In our results from 2015-09-19 to 2026-09-28.
Wording removed by a change is shown struck through, as in the original. 133 changes, 173 other letters.
#39995 from Kevin Park · Rule change · TB 26-09 (2026-09 Fastrack)
In GT2 Spec Lines, GT2 Engines - GINETTA, Engine Family GM LS V8, change as follows effective 10/1/2026:
Fuel Induction: 72 76mm FPR
Weight (lbs): "3300 3150"
#40325 from Ian Barberi · Rule change · TB 26-09 (2026-09 Fastrack)
In GT2-ST Spec Lines, BMW E46 M3 & E36 / BMW Z3 BMW 5000cc V8, add the following effective 10/1/2026:
"The 3.4 liter 6 cyl. (87.0 bore x 93.0 stroke) is permitted at 2575lbs. 4.0L V8 permitted at 2900lbs. 4.5L V8 permitted at 2950lbs.
5.0L V8 permitted at 3000lbs. BMW B58 V8 is permitted at 3300 lbs. with 47mm TIR."
#40550 from Chris Edens · Rule change · TB 26-09 (2026-09 Fastrack)
In GT2 Spec Lines, GT Engines - MAZDA, classify MAZDA MZR/L5-VE as follows effective 10/1/2026:
GT Engines - MAZDA
Engine Family Engine Type Bore x
A specification table follows in the original; it is not shown here.
#40922 from Grand Touring Committee · Rule change · TB 26-10 (2026-10 Fastrack)
In GT Engines - PANOZ, 2013-2016 Ford EcoBoost Twin Turbo V-6, add to notes the following:
"Must use an engine that is a 2013-2016 variation of the 3.5L twin turbo EcoBoost as used in the Ford F150 truck. All OEM
engine internal specifications must be retained.
Compression ratio 10.5-1.
Ford Turbo model part# FL3Z-6K682-E (Left) FL3Z-6K682-F (Right).
Dry sump system is permitted per GT2 rules."
#38584 from Brian Goldburg · Rule change · TB 26-05 (2026-05 Fastrack)
In GT2 Spec Lines, GT Cars - PANOZ, Esperante GTS, change Notes as follows:
"Cars must be prepared to Panoz Esperante GTS specifications and competitors must have a copy of the current GTS rules intheir possession. Wheels: (F) 18x10 (R) 18x11. Track (F) 64.0 (R) 67.8. Any tire with a diameter of 17” or 18” may be usedprovided the tire does not exceed a maximum cross section width of 11.5” in the front and 12.5” in the rear; or may useconventional GT2 tires and wheels per GTCS 9.1.2.F.4.c.10. Internal modification to stock Penske 7500 shocks are permitted.Shock seals are not required. Brakes are unrestricted. Front and rear anti-roll bars are unrestricted. Shock and springs are free,transmission type and ratios are free, differential gear ratio only is free (all GT2 transmission rules apply), roof vents allowed perGTCS.
Front Track 64.0”
Rear Track 67.8”
Panoz cars are allowed to prep to, and must meet GT2 rule set unless otherwise noted on spec line."
#39923 from Butch Kummer · Rule change · TB 26-05 (2026-05 Fastrack)
In GCR, Section APPENDIX L. 2013 TA2 TECHNICAL REGULATIONS, 4.8.2.1., change as follows:
"Shock Absorbers: $850$1005 each
Front Brake Calipers: $715 each
Rear Brake Calipers: $550$585 each
Brake Pads: $250/axle$330 per axle
Wheels: $175$165 each"
#40125 from Grand Touring Committee · Rule change · TB 26-05 (2026-05 Fastrack)
In GT2 Spec Lines, GT2 Cars - PORSCHE, 991.1 GT3 Cup, change Notes as follows:
"Modifications listed in Grand Am, IMSA Cup and World Challenge or any other rules, except those listed above, are specificallynot allowed are permitted. Factory (OEM manufacturer) Lexan front windows allowed as delivered. ABS is allowed."
#39838 from Andrew AQUILANTE · Rule change · TB 26-04 (2026-04 Fastrack)
In GT2-ST Spec Lines, Chevrolet Corvette (14-19), change as follows:
Minimum Weight: "3100 3000"
Restrictor "80 83mm FPR"
#39936 from Grand Touring Committee · Rule change · TB 26-04 (2026-04 Fastrack)
In GT2 Cars - PORSCHE, 997.2 GT3 Cup, change Notes as follows:
"3.8L flat six. 2800 lbs. Aftermarket header allowed. Cars must be prepared in accordance with the appropriate model/year
Porsche factory 911 GT3 Cup parts catalog/service manual. Cars may not be altered in any way except as authorized below.
Drivers must have the correct year manuals as they apply to their specific car in their possession. Safety, drivers comfort, driver
control and instrumentation items may be modified per the GCR. Original factory installed Matter/IMV roll cages are allowed.
The stock unmodified fuel tank is allowed. Windshield clips must be installed per GCR 9.3 Windshield Clips/Rear Window Straps.
All other SCCA safety standards apply. The following additional modifications are authorized: Alternate hood provided it is a
facsimile of the stock part. Any wheel, including 5 bolt (and the required 5 bolt modification to the hubs). Tires per GCR 9.3 Tires.
Battery size and location is unrestricted. Shocks are unrestricted but they shall be installed in the stock locations with the stock,
unmodified pick up points. Any suspension settings are allowed provided they are achieved without modifications. Machining of
suspension components and pick up points to achieve caster/camber/toe is not allowed. Lubricants, consumable fluids (brake
fluid, coolant etc.) and oil filters are open free. Modifications listed in Grand Am, IMSA Cup, World Challenge may be used. orany other rules, except those listed above, are specifically not allowed. Factory (OEM manufacturer) Lexan front windowsallowed as delivered. ABS is allowed."
#39625 from Kevin Park · Rule change · TB 26-03 (2026-03 Fastrack)
In GT2 Spec Lines, GT Cars - GINETTA, classify Ginetta G56 GT4 (V8) as follows:
GT Cars - GINETTA
Model Years Body Style Drive-
line
Wheel-
base (in)
Notes
Ginetta G56 GT4 (V8) N/A 2 dr. RWD N\A
In GT2 Spec Lines, GT Engines, classify GM LS as follows:
GT Engines - Ginetta
Engine
Family
Engine Type Bore x Stroke
A specification table follows in the original; it is not shown here.
#39862 from SCCA Staff · Rule change · TB 26-03 (2026-03 Fastrack)
In GCR, change as follows:
9.1.2 Page 68: "GT-3U (GT3U)"
9.1.2.F page 320: "9.1.2.F. GT-2, 3, 3U LI TE CATEGORY SPECIFICATIONS"
9.1.3.9 Page 320: "9. All GT3U (Majors and Runoffs) cars using up to 15”x7” wheels limited to 225 section width tires shall run atcurrent GT3 race weight plus 225lbs. All Gt3U cars shall run a DOT approved tire with a maximum section width of 245. GT3Ucars are allowed optional 15”x9” wheels with a 1.5% weight addition or up to 18”x9” wheels with a 3.0% weight addition to thetotal weight including the 225 lbs. TCR cars are ineligible for GT3/GT3U.
Table B: Alternate Vehicle and Engine Allowances Page 461:
“Increase the minimum weight of all GT3/GT3U 2.0 liter unrestricted engines to +75 lbs. All GT3 cars running in STU must meet
the minimum ride height of 3.0” for the main frame rails not including rub blocks and a 2” minimum for the front spoiler and
splitter."
#39864 from Grand Touring Committee · Rule change · TB 26-03 (2026-03 Fastrack)
In GT2/ST Spec Lines, AUDI R8 GT4, change Notes as follows:
"Must have GT4 rules in possession at all race events. Please see note at top of GT2-ST Header."
#39249 from Justin Erion · Rule change · TB 26-02 (2026-02 Fastrack)
In GT Spec Lines, create GT Cars - PORSCHE and classify SC as follows:
GT Cars - PORSCHE
Model Years Body Style Drive- line Wheel- base
(in)
Notes
SC 1978 2 Dr. Rear engine/RWD 89.45 May use alternate engine bore.
4.0L 2V @2275 lbs. 4.0L 4V @ 2350 lbs.
#39408 from Jared Lendrum · Rule change · TB 26-02 (2026-02 Fastrack)
In GT Spec Lines, classify M3 E92 in GT Cars - BMW as follows:
GT Cars - BMW
Model Years Body Style Drive-
line
Wheel-
base (in)
Notes
M3 E92 (08-13) 2 Dr. RWD 108.7 Cannot be built to any other rule set.
In GT Spec Lines, classify M3 E92 in GT Engines - BMW - BMW as follows:
GT Engines - BMW
Engine
Family
Engine Type Bore x Stroke
A specification table follows in the original; it is not shown here.
#39086 from Samuel Daniels · Rule change · TB 26-01 (2026-01 Fastrack)
In GCR, Section 4.8.4.2.1., add the following:
"Cars in the class must use 1997, through current year, commercially available stock car bodywork. The following make/model
bodies are allowed:
1. Cadillac CTS
2. Chevrolet Impala
3. Chevrolet Malibu
4. Chevrolet Monte Carlo
5. Chevrolet SS
6. Dodge Intrepid
7. Ford Fusion
8. Ford Taurus
9. Lincoln MKS
10. Pontiac G8
11. Pontiac GTO
12. Pontiac Grand Prix
13. Toyota Camry
Gen late Model Stock Car Bodies are allows:
1. Chevrolet Camaro
2. Ford Mustang
3. Toyota Camry"
#39365 from Chris Edens · Rule change · TB 26-01 (2026-01 Fastrack)
In GT2 Spec Lines, Engines - MAZDA, classify Engine Family BP as follows:
GT2 Engines - MAZDA
Engine
Family
Engine Type Bore x Stroke
(mm)
Disp.
(CC)
Head Type Valves /
A specification table follows in the original; it is not shown here.
#39537 from Grand Touring Committee · Rule change · TB 26-01 (2026-01 Fastrack)
In GT2 Spec Lines, GT2 Cars – Porsche, classify 992.1 GT3 Cup as follows:
GT2 Cars – Porsche
Model Year Body
Style Driveline Wheel Base Notes
992.1
GT3 Cup
(22-25) 2 Dr RWD 4.0L flat six. 3250lbs. w/60mm Throttle Body Restrictor (TBR).
Cars must be prepared in accordance with the appropriate
model/year Porsche factory 911 GT3 Cup parts
catalog/service manual. Cars may not be altered in any way
except as authorized below. Drivers must have the correct
year manuals as they apply to their specific car in their
possession. Safety, drivers comfort, driver control and
instrumentation items may be modified per the GCR. Original
factory installed Matter/ IMV roll cages are allowed. The
stock unmodified fuel tank is allowed. Windshield clips must
be installed per GCR 9.3 Windshield Clips/Rear Window
Straps. All other SCCA safety standards apply. Tires per GCR
9.3 Tires. Lubricants, consumable fluids (brake fluid, coolant
etc.) and oil filters are open free. Factory (OEM manufacturer)
Lexan front windows allowed as delivered. ABS is allowed.
In GT2 Spec Lines, GT2 Cars – Porsche, change Notes as follows:
991.1 GT3 Cup: "3.8L flat six. 3000lbs. w/72mm Throttle Body Restrictor (TBR). Aftermarket header allowed."
991.2 GT3 Cup: "4.0L flat six. 3000lbs. w/65mm 70mm Throttle Body Restrictor (TBR)."
997.2 GT3 Cup: "3.8L flat six. 2900 2800 lbs. Aftermarket header allowed."
In GT2 Spec Lines, GT2 – ST, Chevy Corvette (-2013), change as follows:
5665:
Restrictor: "81 85mm flat plate"
Notes: "GM LS1, LS6. LS1/LS6 C6 Corvettes using the OEM C6 intake manifold and 90 mm throttle body must use a 78mm flat
plate restrictor. OEM 75mm throttle body and manifold do not require a restrictor. LS6 may reduce weight by 50 lbs. L S1/LS6
alternate intake manifold, DORMAN part # 615-900."
LS2 5967 Restrictor: "83 85mm "
L76 5967 Restrictor: "80 83mm flat plate"
LS3 6162 Restrictor: "80 83mm flat plate"
6162 GM LS3:
Weight: "3250 3150"
Restrictor: "74 80mm flat plate"
6162 GM LT1:
Weight: "3250 3150"
Restrictor: "74 77mm flat plate"
In GT2 Spec Lines, GT2 – ST, Chevy Corvette (14-19), change as follows:
5665:
Restrictor: "83 85mm flat plate"
Notes: "GM LS1, LS6. LS1/LS6 C6 Corvettes using the OEM C6 intake manifold and 90 mm throttle body must use a 78mm flat
plate restrictor. OEM 75mm throttle body and manifold do not require a restrictor. LS6 may reduce weight by 50 lbs. L S1/LS6
alternate intake manifold, DORMAN part # 615-900."
LS2 5967:
Weight: "3100 3000"
Restrictor: "83 85mm flat plate"
L76 5967 Restrictor: "80 83mm flat plate"
6162 Restrictor: "80 83mm flat plate"
6162 LS3:
Weight: "3200 3100"
Restrictor: "77 80mm flat plate"
6162 LT1:
Weight: "3200 3100"
Restrictor: "74 80mm flat plate"
#38506 from Justin Erion · Rule change · TB 25-08 (2025-08 Fastrack)
In GT2 Spec Lines, GT2 Cars-Porsche, 911 Coupe & Targa., add to Notes the following:
"Porsche 911-based race cars (911,963,994), the use of the 993 3.8 RSR rear deck lid/spoiler is permitted. Aftermarket
reproductions of the original Porsche Motorsports deck lid provided they faithfully replicate OEM dimensions and functionality,
are acceptable for use."
#37000 from Gordon Leslie · Rule change · TB 25-03 (2025-03 Fastrack)
In GT2 Spec Lines, GT2 Cars - PONTIAC, Fiero, change as follows:
Drive-line: "FWD RWD"
Add to Notes: "Hood bulge permitted as requested for front engine relocation only."
#37590 from Christopher Childs · Rule change · TB 25-03 (2025-03 Fastrack)
In GCR, Section APPENDIX L. 2013 TA2 TECHNICAL REGULATIONS, B.2.c., change as follows:
"The entire rear wing assembly, including the end plates and any Gurney flap, shall be mounted level with, or below, the peak of
the roof. OEM aerodynamic devices do not need to adhere to the height rule."
In GCR, Section APPENDIX K. 2012 STO GENERAL TECHNICAL REGULATIONS, D.4.b., add the following:
"Factory wings, and spoilers, and roof vortex generators are permitted, but must be removed if an approved aftermarket wing is
installed. OEM aerodynamic devices do not need to adhere to the height rule."
#36538 from Jorge A Nazario · Rule change · TB 25-02 (2025-02 Fastrack)
In GCR, Appendix K. 2012 STO Rules, O.9., change as follows:
"May run OEM ABS or convert to an aftermarket ABS controller with 100 50 lb. weight penalty."
#36686 from Brian Goldburg · Rule change · TB 25-01 (2025-01 Fastrack)
In GT2 SPEC LINES, GT Engines - PANOZ, classify 2013-2016 Ford EcoBoost Twin Turbo as follows:
GT Engines – PANOZ
Engine
Family
Engine Type Bore x
Stroke
(in.)
Disp.
(CC)
Head Type Valves /
A specification table follows in the original; it is not shown here.
#37137 from Christopher Childs · Rule change · TB 25-01 (2025-01 Fastrack)
In GCR, Section APPENDIX L. 2013 TA2 TECHNICAL REGULATIONS, B.2.c., change as follows:
"B. Aerodynamic Devices
2. Rear wing
c. The entire rear wing assembly, including the end plates and any Gurney flap, shall be mounted level
with, or below, the peak of the roof. OEM aerodynamic devices do not need to adhere to the height rule."
A specification table follows in the original; it is not shown here.
#37198 from Tom Patton · Rule change · TB 25-01 (2025-01 Fastrack)
In GT2 Spec Lines, GT Engines - SUNBEAM, add to Fuel Induction as follows:
"Carburetors(s) Holly 650 cfm PN #80541-1 and PN #80541-2"
#36093 from Dominic Starkweather · Rule change · TB 24-07 (2024-07 Fastrack)
In GCR Section, Appendix K. 2012.M2, add the following:
"After market replacement differential housings are permitted as long as they are an exact equivalent."
#36235 from Grand Touring Committee · Rule change · TB 24-07 (2024-07 Fastrack)
In 9.1.2. GT2 Spec Lines, GT3 Cars, change Note as follows:
"Note: All GT4 cars are permitted to compete in GT2-ST provided they use a factory supplied power stick or Pro Series
required restrictor. Must have GT4 rules in possession at all race events. Cars must comply with 2012 STO rules as
stated in Appendix K of the GCR. Engine Displacements in this table are nominal. Each competitor shall have available
definitive documentation (e.g., factory manual) of the original displacement for the engine used. Slicks allowed on all
GT2/ST cars with a 100-pound weight penalty."
#35009 from Kristofer Olson · Rule change · TB 24-05 (2024-05 Fastrack)
In GT2-ST Spec Lines, Acura NSX, change as follows:
Minimum Weight: "2700 3000"
Restrictor: "43 45mm TIR"
#35878 from Michael Quattlebaum · Rule change · TB 24-05 (2024-05 Fastrack)
In GT2-ST Spec Lines, Chevrolet Corvette (14-19), change Restrictor as follows:
"78 80mm flat plate"
#33759 from Andrew Aquilante · Rule change · TB 24-03 (2024-03 Fastrack)
In GT2 Spec Lines, classify Chevrolet Corvette C8 (20-) as follows:
GT2-ST Maximum Displacement Minimum Weight Restrictor Notes
Chevrolet Corvette C8
(20-)
6162 3300 71mm -
Flat Plate
LT2 engine.
#35408 from Jim Froula · Rule change · TB 24-03 (2024-03 Fastrack)
In GT2 Spec Lines, GT Cars - MITJET ST, classify MITJET ST as follows:
GT Cars – MITJET ST
Model Years Body Style Drive-
line
Wheel-
base (in)
Notes
MITJET ST 2015 RWD 94.5 Must run per VTS specifications. Must have
complete car Specifications (FIA form
CdM008) at every entered race event.
#35261 from Butch Kummer · Rule change · TB 24-02 (2024-01 Fastrack)
In GCR Section 9.1.2.G (GTA Category Specifications), change as follows:
“9.1.2.G.III.I
The single-plane rear spoiler must be mounted at an angel angle from 50 to 75 degrees (perpendicular to the ground
being 90 degrees) and may not extend beyond the rear bumper when viewed from directly above the rear
bumper. Spoilers must be a minimum of .063 aluminum or Lexan and may vary in overall height to match the contours
of the bodywork. The rear spoiler dimensions shall not exceed 59.0 inches wide by 5.0 inches in height, (measured on
the material surface) , or 295.0 square inches total surface area. Braces to prevent spoiler deflection are allowed, but
may serve no other purpose.”
#35437 from Grand Touring Committee · Rule change · TB 24-02 (2024-01 Fastrack)
In GCR, Section 9.1.2.F.7.5.E. change as follows:
“Direct Injection is not permitted only if it came OE and must be installed using only OE high pressure pump(s), hard and
soft hoses and injectors.”
#35385 from Mike McGinley · Rule change · TB 24-02 (2024-02 Fastrack)
In GT2/ST Chevrolet Corvette 7011 OEM change weight as follows:
“3275 3125“
#35439 from Grand Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)
In GT2/3 modify Spec Line notes as follows:
GT2:
Nissan: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E.”
GT3:
Mazda: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E.”
Mitsubishi 4G93: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E. ”
Nissan QR25DE/DD 1988cc: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E.”
Nissan QE25DE/DD 2489cc: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E.”
#35200 from Sean McCann · Rule change · TB 24-01 (2024-01 Fastrack)
In GT2-ST Spec Lines, Dodge Viper, incl Comp Coupe, ACR/ ACR-X change NOTES as follows:
8300 OEM: "Stock OEM engine. Engine long block, valve train, and intake system must meet stock, shop manual specifications.
Hybrid update including Mopar Performance Part #P5156137. May use Mopar part #5038554AF (Gen 5 Intake Manifold
manifold allowed with (2) 55mm flat plates) and 8.4L mechanical throttle body allowed. VRL Front Fascia -100lbs."
8300: "Hybrid update including Mopar Performance Part # P5156137, Mopar part #5038554AF manifold and 8.4L mechanical
throttle body allowed using (2) 50 45mm flat plate restrictors. VRL Front Fascia –100lbs."
8400: "Intake and Throttle Body from Mopar Performance Part # P5156137allowed using (2) 50 45mm flat plate
restrictors. , Mopar part #5038554AF manifold (Gen 5 Intake Manifold allowed with (2) 50mm flat plates) VRL Front Fascia -
100lbs 8400 OEM 3225 Stock OEM engine. Engine long block."
#34453 from David Gomberg · Rule change · TB 23-12 (2023-12 Fastrack)
from the current (or before) Table of Contents (TOC), to what is shown in the after TOC.
GTL spec lines will now be contiguous with GT2 and 3 spec lines.
GTA category and spec lines will be moved and renumbered behind GTL. GTA Section will not change but page numbers will, (as
shown in Red italics).
9.1.2.F. GT-2, 3, LITE Category Specifications 314
GT2 Cars 327
GT2/ST 341
GT3 Cars 348
GTL Cars 364
GTA Cars 377
P2 Engine Table B.1
2010 and older
Stock Kawasaki
38.5mm
minimum width 52 inches. AMAC-AM5:
minimum width 54 inches.
P2 Engine Table B.1
2008 and older
Stock Engine Suzuki,
Yamaha,
Honda, BMW
38.5mm
P2 Engine Table B.2 Not required
P2 Engine Table B.3 38.5mm
Modified Engine
950 lbs.
1005cc max
P2 Engine Table B.1 37mm
P2 Engine Table B.2 Not required
P2 Engine Table B.3 39mm
Stock Engine
1050 lbs.
#34966 from Scotty B White · Rule change · TB 23-10 (2023-10 Fastrack)
RM 23-10 GT2-ST Dodge Viper, incl Comp Coupe, ACR/ACR-X VRL Front Fascia
As an Errors and omissions fix to what was originally intended for these cars, the Club Racing Board and Board of Directors have
approved the following:
In GT2-ST, Dodge Viper, incl Comp Coupe, ACR/ACR-X add VRL front fascia -100lbs to all Spec Lines.
#34765 from Grand Touring Committee · Rule change · TB 23-09 (2023-09 Fastrack)
In GT2 Spec Lines, Engines - MAZDA, combine both 20B to one spec lines and keep the following:
Weight: "2500 2280"
Notes: "Must run +100 lbs. for Grand Am transaxle and independent rear suspension. Must comply with all other GT2 rules."
#34206 from Ian Barberi · Rule change · TB 23-06 (2023-07 Fastrack)
In GT2-ST Spec Lines, BMW E46 M3 & E36 / BMW Z3 / BMW 5000cc V8, change notes as follows:
"The 3.4 liter 6 cyl. (87.0 bore x 93.0 stroke) is permitted at 2575lbs. 4.0L V8 permitted at 2900lbs. 4.5L V8 permitted at 2950lbs.
5.0L V8 permitted at 3000lbs. Flossman body kit permitted as found at http://www.racingpartsbmw.de/start/eng/start.htm.
Trans Am SGT spec: Regular shifter 3000 lbs., paddle shifter plus 150 lbs. 95mm S54 crankshaft @ +150lbs. Lang Racing part#
S54-95mm-StrokerCrk.
S54 engine is permitted a 97mm stroke crankshaft (part #VAC-SC-S54) @2800lbs."
#34342 from Jorge A Nazario · Rule change · TB 23-06 (2023-07 Fastrack)
In GT2/ST, Chevrolet Corvette (2014-2019) change as follows:
Restrictor: "73 7mm flat plate"
#33771 from Coyote Black · Rule change · TB 23-05 (2023-05 Fastrack)
In GT Cars - Porsche, classify Porsche Cayman ‘S’ as follows:
GT Cars - Porsche
Model Years Body Style Drive-
line
Wheel-
base (in)
Notes
Porsche Cayman ‘S’ 09-12 2 dr. Coupe RWD 95.08 3.4L No PDK Transmission
#33784 from James Rogersn · Rule change · TB 23-05 (2023-05 Fastrack)
In GT Spec Lines, GT1 Cars - Fields Cardinal, classify Fields Cardinal V8 as follows:
GT1 Cars – Fields Cardinal
Model Years Body Style Drive-
line
Wheel-
base (in)
Notes
Fields Cardinal V8 2023 2 Dr. RWD 92.0 Roll Cage MUST be modified to comply with
GCR Section 9.4.
In GT Spec Lines, GT1Engines - classify Ford V8 as follows:
GT1 Engines - Ford
Engine
Family
Engine Type Bore x
A specification table follows in the original; it is not shown here.
#33825 from Robert Mueller · Rule change · TB 23-04 (2023-04 Fastrack)
In GT Cars - Ginetta, Ginetta G56 GTA, add to Notes as follows:
"May use Factory installed ProMap ECU Map."
#33729 from Grand Touring Committee · Rule change · TB 23-02 (2023-02 Fastrack)
In GT2 Spec Lines, Engines - Mazda, 13B Street / Bridge Port, change Notes as follows:
"Part# EFR 76/70 BW7670 or Garrett G30-660 Turbocharger-46mm Turbo Inlet Restrictor (TIR), Street Port only @ 2280lbs."
#33337 from Evan Slater · Rule change · TB 23-01 (2023-01 Fastrack)
In GT2 Engines - Porsche, Engine Type SOHC with 2478 Displacement, change Notes as follows:
"2V only: May use Borg Warner EFR 76/70 42 44mm SIR TIR or Garrett G30-660 w/44mm TIR @2280 lbs."
In GT2 Engines - Porsche, Engine Type SOHC with 2681 Displacement, change Notes as follows:
"2V only: May use Borg Warner EFR 76/70 42 44mm SIR TIR or Garrett G30-660 w/44mm TIR @2330 lbs."
In GT2 Engines - Porsche, Engine Type SOHC with 2992 Displacement, change Notes as follows:
"2V only: May use Borg Warner EFR 76/70 42 44mm SIR TIR or Garrett G30-660 w/44mm TIR @2405 lbs."
#33342 from Joe Aquilante · Rule change · TB 23-01 (2023-01 Fastrack)
In GT2-ST, Chevrolet Corvette (14-19) w/ Maximum Displacement L76 5967, change Restrictor as follows:
"70 73"
#33415 from Scott Schick · Rule change · TB 23-01 (2023-01 Fastrack)
In GT2 Spec Lines, Engines - Toyota, add the following Spec Line:
Engines - TOYOTA
Engine
Family
Engine Type Bore x
A specification table follows in the original; it is not shown here.
#33437 from Grand Touring Committee · Rule change · TB 23-01 (2023-01 Fastrack)
In GT2 Spec Lines, Engines - MAZDA, 13B Street / Bridge Port, change Notes as follows:
"Part# EFR 70/76 76/70 Turbocharger-42 46mm"
#33610 from Grand Touring Committee · Rule change · TB 23-01 (2023-01 Fastrack)
In GT2-ST Spec Lines, BMW E36/46, add to Notes as follows:
"In the US. MA Shaw a company that also builds BMW body kits has both E36 and E46 carbon/composite door offerings E36/46:
https;//www.mashaw.com/html/product_info_BMW.html.
-BMW E-36 PTG style wide body kit
-M-3 front bumper with splitter
-Front fenders
-Side rockers
-Rear flairs
-Rear bumper"
#33669 from Grand Touring Committee · Rule change · TB 23-01 (2023-01 Fastrack)
In GT2, 3, LITE Category Specifications, GCR Section 9.1.2.F.13.m., add the following:
" For GT3 only:
1. As an option, induction system "Chokes" may be used where a SIR is required.
Said chokes shall be fitted to each barrel of carburetor/throttle body and all airflow into engine must pass through them. Choke
size will be the same as listed SIR unless noted.
This option is for normally aspirated cars with SIRs only and does not apply to turbo cars with TIRs."
#33670 from Grand Touring Committee · Rule change · TB 23-01 (2023-01 Fastrack)
In GT2, 3, LITE Category Specifications, GCR Section 9.1.2.F.13.m., add the following:
“2. All 2.0 liter 4-valve non-turbo engines currently listed in GT3 shall be permitted to run without any restriction (SIR or chokes)
at 2060lbs.”
#33681 from Grand Touring Committee · Rule change · TB 23-01 (2023-01 Fastrack)
In GT2, Porsche 991.1 GT3 Cup, make changes as follows:70 72mm Throttle body Restrictor (TBR)
ABS is allowed with a 100lb. penalty.
In GT2, Porsche 991.2 GT3 Cup, make Changes as follows:3100 3000lbs. 65 67mm Throttle Body Restrictor (TBR)
In GT2, Porsche 996/997.1 GT3 Cup, make Changes as follow:
ABS is allowed with a 100lb. penalty.
In GT2, Porsche 997.2 GT3 Cup, make changes as follows:
ABS is allowed with a 100lb. penalty.
In GT2-ST, Chevrolet Corvette (-2013), make Changes as follows:
LS1,LS6 5665 75 78mm flat plate
LS2 5967 75 78mm flat plate
LS6 5967 74 77mm flat plate
Stock OEM LS3 6162 74 77mm flat plate
LS3 6162 71 74mm flat plate
LT1 6162 68 71mm flat plate
LS7 7011 65 68mm flat plate
In GT2, Chevrolet Corvette (14-19), make changes as follows:
LS1,LS6 5665 75 78mm flat plate
LS2 5967 75 78mm flat plate
L76 5967 70 73mm flat plate
Stock OEM LS3 6162 74 77mm flat plate
LS3 6162 71 74mm flat plate
LT1 6162 68 71mm flat plate
LS7 7011 65 68mm flat plate
In GT2-ST, Cadillac CTS/CTS-V , Chevrolet Camaro, Pontiac Fiero, Pontiac Firebird, Pontiac Solstice, make changes as follows:
LS7 7011 75 78mm flat plate or 45mm SIR
LS7 7011 80 83mm flat plate
In GT2-ST, Dodge Viper, incl Comp Coupe, ACR/ACR-X, make changes as follows:
7900 3275 3125
8000 3275 3125
OEM 8300 3275 3125
8300 3275 3125
8400 3275 3125
#33315 from Butch Kummer · Rule change · TB 22-12 (2022-12 Fastrack)
In GCR Appendix L-TA2 rules, Addendum A, change A.2. as follows:
"The throttle body must be either a GM 90mm, electronic, part #1257 → 0790, or Edelbrock 90mm, mechanical, part 33869 or
#3870."
In GTA, GCR Section 9.1.2.G.3., change as follows:
"The throttle body must be either a GM 90mm, electronic, part #1257 → 0790, or Edelbrock 90mm, mechanical, part 33869 or
#3870."
#33357 from Baer Connard · Rule change · TB 22-12 (2022-12 Fastrack)
In GT Cars - Ginetta Spec Lines, Ginetta G56 GTA, add to Notes as follows:
"Optional: May use 18” x 9’’ and 18” x 10” Wheels."
#32447 from Ian Barberi · Rule change · TB 22-11 (2022-11 Fastrack)
In GT2/ST Spec Lines, BMW E46 M3 & E36 / BMW Z3 / BMW 5000cc V8, change Notes as follows:
"In the US, MA Shaw a company that also builds BMW body kits has both E36 and E46 carbon/ composite door offeringsE36/E46: https://www.mashaw.com/html/product_info_BMW.html.
-BMW E-36 PTG style wide body kit
-M-3 front bumper with splitter
-Front fenders
-Side rockers
-Rear flairs
-Rear bumper"
#32982 from Jorge A Nazario · Rule change · TB 22-10 (2022-10 Fastrack)
In GT2/ST Spec Lines, Chevrolet Corvette (-2013), GM L76 5967, change Restrictor as follows:
"73 4mm"
#32799 from John Mills · Rule change · TB 22-09 (2022-09 Fastrack)
In GT, GCR Section 9.1.2.F.7.a.6:
"Glass and/or plastic headlights, front parking lights, front signal lights, lenses, and bulbs shall be removed. Headlight openings
shall be covered with a wire mesh screen or panel having the same contour as the original lens, mounted so that the headlight
bezel/rim remains in place, maintaining the standard appearance of the Production automobile. Side marker light assemblies
shall be removed and the resulting openings covered with a plate whose dimensions do not exceed those of the original parts;
side marker lights that are an integral part of the taillight assembly cannot be removed. Other lighting parts and operating
mechanisms may be removed. In the case of pop-up headlights, the entire assembly may be removed and the opening covered
with a screen or plate (as above, without the headlight bezel/rim requirement) which provides a stock appearance. It is not
permitted to relocate the standard headlight, parking light, signal light, etc., openings. Traditional GT cars only. Not allowed with
any "Spec Car, GT2-ST, or any other added non Traditional GT car. Taillights shall be in the original location and shall may be the
original style/type of taillight for the make, model, and year of car. A rear body panel having the same contour as the original
lens area and in the original location, may be fitted with a tail-light graphic of the original style/type frame/lens adhered to it. If
side marker lights are an integral part of the tail-light assembly they must be represented by the panel graphic. These
panel/graphics shall have a functioning red LED lamp assembly fitted through them on both sides of the car to serve as brake
lights. A 15-watt or equivalent rain light may be included with-in this LED assembly or may be a separately mounted single or
dual LED assembly."
#33076 from Grand Touring Committee · Rule change · TB 22-09 (2022-09 Fastrack)
In GT2 Spec Lines, classify Ginetta GTA G56 as follows:
GT Cars - Ginetta
Model Years Body Style Drive-
line
Wheel-
base (in)
Notes
Ginetta G56 GTA 2021-22 2dr Coupe RWD 96.6” Weight 2600lbs. 3.7L Ford V6 (Sealed)
w/dry sump.W/ 6 speed Quaife sequential.
Must be run as a “Spec Car” as Factory
built and sealed. Must have Factory
manual or Factory Build Sheet in possession
at all race events. May use any brand of
oil, filter, gear oil and brake fluid.
#32682 from Tony Colicchio · Rule change · TB 22-08 (2022-08 Fastrack)
In GT2/ST Spec Lines, add to Notes the following:
"Lang Racing
E46 carbon roof part number E46-2DR-CFROOF
2M Automotive
E46 coupe SKU: 2ME46CR1x1 (coupe 1x1 weave)
E46 coupe SKU: 2ME46CR2x2 (coupe 2x2 weave)
E46 sedan SKU: 2ME46SR1x1 (sedan 1x1 weave)
E46 sedan SKU: 2ME46SR2x2 (sedan 2x2 weave)
E36 coupe SKU: 2ME36CR1x1 (coupe 1x1 weave)
E36 coupe SKU: 2ME36CR2x2 (coupe 2x2 weave)
Flossmann, the maker of the approved GT2-ST body kit makes carbon doors for the E46 model
E46:https://www.flossmann-motorsport.com/en/3-series/e46-gtr/
In the US, MA Shaw a company that also builds BMW body kits has both E36 and E46 carbon/composite door offerings
E36/E46: https://www.mashaw.com/html/product_info_BMW.html"
#32698 from Ian Barberi · Rule change · TB 22-08 (2022-08 Fastrack)
In GT2/ST Spec Lines, BMW E46 M3 & E36 / BMW Z3 / BMW 5000cc V8, add to Notes the following:
"95mm S54 crankshaft @ +150lbs. Lang Racing part# S54-95mm-Stroker-Crk."
#32805 from Tony Ave · Rule change · TB 22-08 (2022-08 Fastrack)
In GT2 Spec Lines, classify AUDI R8 GT4 as follows:
GT2 Maximum
Displacement Minimum Weight Restrictor Notes
AUDI R8 GT4 5.2L 3000 Per factory
specs.
Must have GT4 rules in possession
at all race events.
#32308 from Richard Gray · Rule change · TB 22-05 (2022-04 Fastrack)
In GT-2, 3, LITE CATEGORY SPECIFICATIONS, GCR Section 9.1.2.F.7.c.11., change as follows:
"Shock absorbers: It is not permitted to alter the number of shock absorbers. The make of shock absorber is free and its points of
attachment may be moved."
#32424 from Grand Touring Committee · Rule change · TB 22-05 (2022-04 Fastrack)
In GT2 Spec Lines, Engines - PORSCHE, add to Notes as follows:
SOHC - 100 x 78.9: "2V only: May use Borg Warner EFR 76/70 42mm SIR @2280 lbs. Alt.4 valve head #944 104 013 03 NOTE: 4
valve head is not permitted to use with turbo allowance."
SOHC - 104 x 78.9: "2V only: May use Borg Warner EFR 76/70 42mm SIR @2330 lbs."
SOHC - 95.0 x 70.4: "2V only: May use Borg Warner EFR 76/70 42mm SIR @2405 lbs."
In GT2 Spec Lines, Engines - PORSCHE, change as follows:
Bore x Stroke: “95.0 x 70.4 104.0 x 88.0”
Weight: “1950 2090”
#31597 from Richard Gray · Rule change · TB 22-03 (2022-03 Fastrack)
In GT2 Cars - Ginetta, classify Ginetta G40 as follows:
GT2 Cars - GINETTA
Model Years Body Style Drive-
line
Wheel-
base (in)
Notes
Ginetta G40 2002-
Present
2-Door Coupe RWD 88.6” Must comply all GT2 rules except as noted
on spec line. May use FIA roll cage. Must
have complete build specs in possession at
all race events.
In GT2-Engines - Ginetta, classify Ginetta/Mazda MZR/L5-VE as follows:
GT2 Engines - GINETTA
Engine Family Bore x Stroke (mm) Disp.
A specification table follows in the original; it is not shown here.
#31737 from Dominic Starkweather · Rule change · TB 22-03 (2022-03 Fastrack)
In GT2-ST, classify Toyota Supra GT4 as follows:
GT2-ST Maximum Displacement Minimum Weight Restrictor Notes
Toyota Supra GT4 3000L 3000 Per factory Spec. Must have GT4 rules in
possession at all race
events.
#31900 from Alex McBain · Rule change · TB 22-03 (2022-03 Fastrack)
In GT2/ST Spec Lines, Porsche 944/924, change Notes as follows:
"May use Jayco super 50 ERC 76/70 Turbo."
#31991 from Grand Touring Committee · Rule change · TB 22-02 (2022-02 Fastrack)
In GT2-ST Spec Lines, Porsche Cayman (05-15), change Notes as follows:
"4.0L 70 75mm"
#31451 from Marvin Epps · Rule change · TB 22-01 (2022-01 Fastrack)
In GT2-ST Spec Lines, Porsche Cayman (05-15) , change Notes as follows:
"4.0L 70mm Flat Plate Restrictor Throttle Body Restrictor (TBR) @ 2700lbs. No variable valve timing and no direct injection. 4.2
70mm flat plat restrictor Throttle Body Restrictor (TBR) @ 2700 lbs."
#30656 from Luis Rivera Jr · Rule change · TB 21-10 (2021-10 Fastrack)
In GT2 Engines - Mazda Spec Lines, 13B, add to Notes as follows:
"Part# EFR 70/76 Turbocharger-42mm Turbo Inlet Restrictor (TIR), Street Port only @ 2280lbs."
#31032 from Bryan Scheible · Rule change · TB 21-10 (2021-10 Fastrack)
In GT3 Engines - VOLKSWAGEN, classify Fun Cup Beetle EVO3 as follows:
GT3 Engines - VOLKSWAGON
A specification table follows in the original; it is not shown here.
#31088 from Grand Touring Committee · Rule change · TB 21-09 (2021-09 Fastrack)
In GT2/ST Spec Lines, Dodge Viper, incl Comp Coupe, ACR/ACR-X8300, change weight as follows:
"3275 VRL Spec Front Fascia -100lbs"
#30339 from Keith Kimberly · Rule change · TB 21-08 (2021-08 Fastrack)
In GT2/ST, classify World Challenge Pontiac GTO (04-06) as follows:
GT2-ST Maximum Displacement Minimum Weight Restrictor Notes
04-06 World Challenge
Pontiac GTO
6062 3000 Must be prepared to
World Challenge Pontiac
GTO rules. Competitor
must have build rules in
their possession.
#30615 from Butch Kummer · Rule change · TB 21-08 (2021-08 Fastrack)
In GCR, Section 9.1.2.G.16., change as follows:
"0-80541-1 0-80541-2"
In GCR, Section 9.1.2.G., Appendix Z 5.a. change as follows:
"0-80541-1 0-80541-2"
In GCR, TA2 Appendix B.3.4, change as follows:
"#6010 6014X"
#30973 from Grand Touring Committee · Rule change · TB 21-08 (2021-08 Fastrack)
In GTX Spec Lines, eliminate GRULLON line in its entirety.
In GT2/ST, classify GRULLON as follows:
GT2-ST Maximum Displacement Minimum Weight Restrictor Notes
GRULLON GT 2.0L
2003-2006 Acura K20
2350 lbs. Unrestricted Must comply with factory
specifications, must have
factory spec manual in
possession at each event.
#30472 from Marvin Epps · Rule change · TB 21-07 (2021-07 Fastrack)
In GT2-ST, Porsche Cayman (05-15), change Notes as follows:
"65 75mm Flat Plate Restrictor @ 2700lbs. No variable valve timing and no direct injection. 4.2 70mm flat plat restrictor 2700
lbs."
#30565 from Scotty B White · Rule change · TB 21-07 (2021-07 Fastrack)
In GT2/ST Spec Lines, Dodge Viper, incl Comp Coupe, ACR/ ACR-X - 8300, change Min. Weight as follows:
"3275
VRL Spec -100lbs"
#30641 from Scott Sanda · Rule change · TB 21-07 (2021-07 Fastrack)
In GCR, Appendix L., add the following:
"APPENDIX L: 2013 TA2 TECHNICAL REGULATIONS
Cars must comply with Appendix L. (prior generation TA2 rules) or current Trans Am rules at 2930 lbs. Tire make/size are free."
#30421 from Grand Touring Committee · Rule change · TB 21-04 (2021-04 Fastrack)
In GT2 Engines - SUNBEAM, change as follows:
"Optional engine firing order of later versions of SBF family (302) 1,3,7,2,6,5,4,8.
May use optional firing order of later version of SBF Family (Boss 302) 1,3,7,2,6,5,4,8"
#30029 from Club Racing Board · Rule change · TB 21-01 (2021-01 Fastrack)
In GT2-ST, Spec Lines, classify Chevrolet Corvette (-2013) as follows:
GT2-ST Maximum Displacement Minimum Weight Restrictor Notes
Chevrolet Corvette
(-2013)
L76
5967
3000 73 mm Flat Plate GM L76. May use the
LSX cast iron block with
OEM LS2 bore and
stroke.
In GT2-ST, Spec Lines, Chevrolet Corvette (-2019), change as follows:
Year: "(14-20 19)"
Restrictor:
L76 5967: "70 73 mm flat plate"
In GT2-ST, Spec Lines, Chevrolet Corvette (-2019), change Min. Weight as follows effective 3/1/2021:
LS2 5967: "3000 3100"
L76 5967: "3000 3100"
6162 w/74mm flat plate: "3000 3100"
6162 w/71mm flat plate: "3250 3300"
6162 w/68mm flat plate: "3250 3300"
7011: "3200 3300"
7011 OEM: "3275 3325"
#30121 from Kevin Allen · Rule change · TB 21-03 (2021-03 Fastrack)
In GCR, Section 9.1.2.F.7.b.15.E.3., remove the following:
"The rear engine opening must start after the rear edge of the rear wheel opening."
#30329 from Grand Touring Committee · Rule change · TB 21-03 (2021-03 Fastrack)
In GT2 Spec Lines, Ford Mustang/ Thunderbird (Boss 302), change Notes as follows:
"Firing order is unrestricted" for this engine. Optional engine firing order of later versions of SBF family (302) 1,3,7,2,6,5,4,8."
#30064 from Grand Touring Committee · Rule change · TB 21-02 (2021-02 Fastrack)
In GT2, GCR section 9.1.2.F.7.j.1, add the following:
"ABS braking systems are allowed if shown on the individual Spec Line."
#30192 from SCCA Staff · Rule change · TB 21-02 (2021-02 Fastrack)
In GT2/ST, clarify C6 and C7 spec lines with Race Memo 20-01.
ISSUED: January 05, 2021 NUMBER: RM 21-01
FROM: Board of Directors
TO: All Participants
SUBJECT: GT2/ST Corvette year/model clarifications Letter #30192
To address Errors & Omissions in the January 2021 Fastrack letter #30029, spec lines depicting the model/year/engine
configurations for the C6 and C7 Corvette in GT2/ST need to be split for clarification.
GT2/ST Max. Displacement Min.
A specification table follows in the original; it is not shown here.
#29742 from Tom Patton · Rule change · TB 21-01 (2021-01 Fastrack)
In GT2/ST, Spec Lines, Ford Mustang/ Thunderbird (Boss 302), add to Notes as follows:
"Firing Order is Unrestricted" for this engine."
#29833 from Nathan McBride · Rule change · TB 21-01 (2021-01 Fastrack)
In GT2/ST, Spec Lines, BMW E46 M3 & E36 / BMW Z3 / BMW 5000cc V8, change weight as follows:
"2600 2500"
#29380 from Gregory Bailiff · Rule change · TB 20-12 (2020-12 Fastrack)
In GT2, classify the Chrysler/Dodge/Plymouth engine as follows:
GT2 Engines - CHRYSLER/DODGE/PLYMOUTH
Engine
Family
Engine Type Bore x
Stroke
(mm)
Disp.
(CC)
Head Type Valves /
Cyl.
Fuel Induction Weight
(lbs)
Notes
DOHC 87.5 x 101.0 2429 Alum,
Crossflow
2 Unrestricted
automotive
type
1950
#29219 from Grand Touring Committee · Rule change · TB 20-10 (2020-10 Fastrack)
In Appendix L, TA2, GCR Section 4.8.4.2.1., change as follows:
"Cars in the class must use 1997 through current year commercially available stock car bodywork. The following make/model
bodies are allowed:All Stock Car bodies are being removed from GT2 in 2021."
#29447 from Butch Kummer · Rule change · TB 20-10 (2020-10 Fastrack)
In GCR, Appendix L, 4.8.4.2.10.3.6, renumber after .6, eliminating .17 - .19.
#29469 from Grand Touring Committee · Rule change · TB 20-10 (2020-10 Fastrack)
In Appendix L. TA2, GCR section 4.8.4.2.10.2.3, add wing width as follows:
"The maximum wing width, including end plates, is TBD 65 -5/16 inches."
#29193 from Randall Smart · Rule change · TB 20-09 (2020-09 Fastrack)
In GCR, Section 9.1.2.F.3.5., Specifications, change as follows:
"Turbocharging/supercharging is not permitted. unless listed on the spec line."
#29221 from Grand Touring Committee · Rule change · TB 20-09 (2020-09 Fastrack)
In GCR, Chevrolet Corvette (-2019) with 5665 Max Displacement, add to Notes as follows:
"LS1/LS6 alternate intake manifold, DORMAN part # 615-900."
#29373 from Grand Touring Committee · Rule change · TB 20-09 (2020-09 Fastrack)
In GT2 Spec Lines, 997.2 GT3 Cup, change Notes as follows:
"3000 2900lbs"
#28951 from Greg Anthony · Rule change · TB 20-08 (2020-08 Fastrack)
In GT2/ST Spec Lines, BMW E46 M3 & E36 / BWM Z3 / BMW 5000cc V8, add to notes as follows:
"Trans Am SGT spec: Regular shifter 3000 lbs., paddle shifter plus 150 lbs."
#29171 from Grand Touring Committee · Rule change · TB 20-08 (2020-08 Fastrack)
In GT, GCR section 9.1.2.F.7.b.15., add as follows:
"F. Up to four hood/fender louvered panels are allowed. Total measurement area of panels shall not
exceed 600 sq inches with a minimum of five slots (louvers) for each panel. All louvered panels must be
mounted in front of the windscreen."
#28874 from SCCA Staff · Rule change · TB 20-07 (2020-07 Fastrack)
In Appendix L TA2 Rules, clarify wording as follows:
“4.8.4.1.10.1.1: The maximum height of the wing, including end plates and wicker Gurney flap, can be
no greater than the highest point on the roof. The roof may not be altered or pushed up to increase its
height.”
“4.8.4.1.10.1.5: The wing end plates must fit within a rectangle measuring 11.00 inches long by 4.00
inches tall. All wing elements, including the wicker bill Gurney flap, must be kept within the profile of the
end plates. The endplates must be mounted parallel to the vehicle centerline, and must be
perpendicular to the ground. Endplates must be flat, with no curvature or Gurney tabs flap. “
“4.8.4.1.10.1.6: A wicker bill (Gurney) Gurney flap may be added to the wing element. It must be a
uniform shape across the complete width of the wing. No air may pass between the wicker bill Gurney
flap and the wing. It must form a 90 degree angle with the wing surface. The size of the wicker bill
Gurney flap cannot exceed 0.50 inch high as measured from the wing surface. The thickness of thewicker Gurney flap material must be 0.625 inch.”
“4.8.4.1.10.2.4: The dog leg style Howe endplates must be used without modification. All wing
elements, including the wicker bill Gurney flap, must be kept within the profile of the end plates. The
endplates must be mounted parallel to the vehicle centerline, and must be perpendicular to the ground.
Endplates must be flat, with no curvature or Gurney tabs flap. “
“4.8.4.1.10.2.5: A wicker bill (Gurney) Gurney flap may be added to the upper wing element. It must be
a uniform shape across the complete width of the wing. No air may pass between the wicker bill Gurney
flap and the wing. It must form a 90 degree angle with the wing surface. The size of the wicker bill
Gurney flap cannot exceed 0.375 inch. The thickness of the wicker bill Gurney flap must be 0.0625
inches.”
“4.8.4.2.10.3.4: The dog leg style Howe endplates must be used without modification. All wing
elements, including the wicker bill Gurney flap, must be kept within the profile of the end plates. The
endplates must be mounted parallel to the vehicle centerline, and must be perpendicular to the ground.
Endplates must be flat, with no curvature or Gurney tabs flap. “
“4.8.4.2.10.3.5: A wicker bill (Gurney flap) Gurney flap may be added to the upper wing element. It must
be a uniform shape across the complete width of the wing, and must be kept within the profile of the
end plates. It must form a 90 degree angle with the wing surface. The size of the wicker bill Gurney flap
cannot exceed 0.375 inch high as measured from the wing surface. The thickness of the wicker Gurney
flap material must be 0.0625 inch.”
#28883 from SCCA Staff · Rule change · TB 20-07 (2020-07 Fastrack)
In Appendix K, STO, clarify wording as follows:
B.2.a.: "Wings shall be a single element with a maximum chord length of 12.00 inches, including anywicker Gurney flap."
B.2.c.: "The entire rear wing assembly, including the end plates and any wicker Gurney flap, shall be
mounted level with, or below, the peak of the roof."
#28909 from SCCA Staff · Rule change · TB 20-07 (2020-07 Fastrack)
In GT, GCR section 9.1.2.F.7.b.12., clarify Gurney flap as follows:
"D. The use of fences, end rails, Gurney flaps, wickerbills,or other forward facing lips or aerodynamic
devices is prohibited."
"E. A maximum 0.50 inch Gurney tab flap is allowed at the trailing edge of the wing element. The tab
must be mounted 90 degrees to the upper wing surface. No air may pass between the tab and the wing.
The endplates must be mounted parallel to the vehicle centerline, and must be perpendicular to the
ground. Endplates must be flat, with no curvature or Gurney tabs flaps."
"GT3: The maximum width of the entire wing assembly (wing element, endplates, Gurney tab flap and
mounting hardware) is 64.00 inches, but no wider than the rear body width including fender flares."
In GT, GCR section 9.1.2.F.7.b.13., clarify Gurney flap as follows:
"A. Endplates must be flat, with no curvature or Gurney tabs flap. A maximum 0.5-inch wicker-bill Gurney flap may be employed."
In GT, GCR section 9.1.2.F.7.b.15.D., clarify Gurney flap as follows:
"2. Rear Wing: Wings shall be a single element with a maximum chord length of 12.00 inches, including
any wicker Gurney flap."
"4. The entire rear wing assembly, including the end plates and any wicker Gurney flap, shall be
mounted level with, or below, the peak of the roof."
#28739 from Christopher Childs · Rule change · TB 20-06 (2020-06 Fastrack)
In GT2/ST, Dodge Viper, incl Comp Coupe, ACR/ ACR-X 8400 OEM, change Min. Weight as follows:
"3325 3275"
#28896 from Club Racing Board · Rule change · TB 20-06 (2020-06 Fastrack)
In GT2/ST, Chevrolet Corvette (-2019) 7011 OEM, change Min. Weight as follows:
"3325 3275"
#28576 from Craig Anderson · Rule change · TB 20-05 (2019-05 Fastrack)
In GT2, Chevrolet Corvette (-2019) 5665, add to the notes as follows:
"LS6 may reduce weight by 50 lbs."
#28280 from R. Paul Evans · Rule change · TB 20-04 (2020-04 Fastrack)
In GT2, add to Engines - PANOZ as follows:
GT Engines - PANOZ
A specification table follows in the original; it is not shown here.
#28583 from Grand Touring Committee · Rule change · TB 20-04 (2020-04 Fastrack)
In GT2-ST, Chevrolet Corvette (-2019), change Spec Line as follows:
GT2-ST Maximum
Displacement
Minimum
Weight Restrictor Notes
LS2 5967 3000 70 75mm flat
plate
GM LS2/L76. May use the LSX cast iron
block with OEM LS2 bore and stroke.
#28584 from Grand Touring Committee · Rule change · TB 20-04 (2020-04 Fastrack)
In GT2-ST, Chevrolet Corvette (-2019), add to Spec Line as follows:
GT2-ST Maximum
Displacement
Minimum
Weight Restrictor Notes
L76 5967 3000 70 mm flat
plate
GM L76. May use the LSX cast iron block
with OEM LS2 bore and stroke.
#28194 from Nathan McBride · Rule change · TB 20-03 (2020-03 Fastrack)
In GT2, Porsche 991.2 GT3 Cup Car, change engine displacement as follows:
"3.8L 4.0L"
#27323 from Todd Oppermann · Rule change · TB 20-02 (2020-02 Fastrack)
In GCR section 9.1.2.F.6.c.1, add as follows:
Alternatively, the bottom may be captured in a channel.
"No clips or straps are required if bonded-glass factory windshields and/or rear windows are attached to
chassis per original specifications (i.e., glass-bonding adhesive).”
#27898 from Christopher DeShong · Rule change · TB 20-02 (2020-02 Fastrack)
In GCR Appendix L, section 4.8.4.2.1, add the following:
"All Stock Car bodies are being removed from GT2 in 2021."
In GCR Appendix L, section 4.8.4.2.1, change as follows and renumber:
"5. Dodge Charger Chevrolet SS"
#26308 from Andrew Wickline · Rule change · TB 20-01 (2020-01 Fastrack)
In GTX - MISC., Classify and add as follows:
GTX – MISC.
Make Model Engine Restrictor
mm Weight (lbs) Notes
Factory Five Type 65
Coupe R
Ford
302/351
NA 2600
Factory Five Type 65
A specification table follows in the original; it is not shown here.
#27701 from Matt Jensen · Rule change · TB 20-01 (2020-01 Fastrack)
In GT2, classify the 991.2 GT3 Cup Car as follows:
GT2 Cars -
Model Years Body Style Drive-
A specification table follows in the original; it is not shown here.
#27755 from Shad Huntley · Rule change · TB 20-01 (2020-01 Fastrack)
In GT2/ST, Acura NSX, change weight as follows:"3000 2700"
#27914 from Grand Touring Committee · Rule change · TB 20-01 (2020-01 Fastrack)
In GT2. Porsche 991.1 GT3 Cup, change restrictor size in the notes as follows:
"67 70 mm"
#27915 from Grand Touring Committee · Rule change · TB 20-01 (2020-01 Fastrack)
In GT2, Porsche 996/997.1 GT3 Cup, change the weight in the notes as follows:
"2900 2800"
#27920 from Grand Touring Committee · Rule change · TB 20-01 (2020-01 Fastrack)
In GT2/ST, Chevrolet Corvette (-2019), with Max. Displacement of 5967, change restrictor size as
follows:
"75 70 mm"
#27077 from SCCA Staff · Rule change · TB 19-07 (2019-07 Fastrack)
In GT2 TA2 Cars, add weight to the spec line as follows:
Cars must comply with Appendix L. (prior generation TA2 rules) or current Trans Am
rules at 2930 lbs. Tire make/size are free.
#25185 from Amir Haleem · Rule change · TB 19-06 (2019-06 Fastrack)
In GT2/ST, classify the Toyota Supra with 3SGTE engine as follows:
GT2-ST Maximum
Displacement Minimum Weight Restrictor Notes
Toyota Supra with
3SGTE engine
2.0L 2900 lbs. 43mm TIR
#26121 from Shad Huntley · Rule change · TB 19-06 (2019-06 Fastrack)
In GT2/ST, classify the Acura NSX (All Years), as follows:
GT2-ST Maximum
Displacement
Minimum
Weight Restrictor Notes
ACURA NSX
(All Years)
3.5L w/Turbo 3000 lbs. 43mm TIR TURBO:Garrett GTX4088R or BorgWarner EFR 8474
Driving Ambition Wide body kit #DA-4000-2
Front Nose #DA-4100
Front Lip with splitter #DA-4110
Front Hood #DA-2010
Left Front Fender #DA-4100LF
Right Front Fender #DA-4100RF
Left lower side skirt #DA-4110L
Right Lower side skirt #DA-4110R
Left Rear Fender #DA-4100LR
Right rear Fender #DA-4100RR
Rear trunk/deck lid #DA-1040
Rear Bumper #DA-1030
APR Rear Wing GTC-500
#26509 from Don McMillon · Rule change · TB 19-06 (2019-06 Fastrack)
In Appendix L, GCR section 4.8.3.1, change the weight as follows:
"The minimum weight for all TA2 cars is 2830 2930 pounds."
#26106 from Mike McAleenan · Rule change · TB 19-05 (2019-05 Fastrack)
In GT2/ST, BMW E46 M3 & E36 / BMW Z3 /BMW 5000cc V8, delete notes and add as follows:
“The 3.4 liter 6 cyl. (87.0 bore x 93.0 stroke) is permitted at 2575lbs. 4.0L V8 permitted at
2900lbs. 4.5L V8 permitted at 2950lbs. 5.0L V8 permitted at 3000lbs. Flossman body kit
permitted as found at http://www.racingpartsbmw.de/start/eng/start.htm.”
#26141 from Michael Major · Rule change · TB 19-05 (2019-05 Fastrack)
In GTX, GCR section 9.1.2.H.I.3, add throttle body size as follows:
“GTX tube frame cars may install fuel injection system, maximum throttle body
size TBD 90mm.”
#26535 from Jeffery Smisek · Rule change · TB 19-05 (2019-05 Fastrack)
In GTX, classify the Ligier JS2 R as follows:
GTX- MISCModel Homologation Model Restrictor Weight Notes
#26159 from Tom Dewitt · Rule change · TB 19-04 (2019-04 Fastrack)
In GT2/ST, classify the Ford Mustang (2005-) as follows:
GT2-ST Maximum
Displacement Minimum Weight Restrictor Notes
Ford Mustang
(2005-)
5.2L 3300 lbs. Single 82mm
Throttle Body
Mustang only: Allow lightweight Carbon
Fiber fenders, fascias, doors, and roof
panels so as to help this car to meet
minimum weight. Parts must meet original
profile of OEM components. Part numbers
to be provided.
#26600 from SCCA Staff · Rule change · TB 19-04 (2019-04 Fastrack)
In GT1, GCR section 9.1.2.D.5.a.1, omit ride height and re-number section as follows:
“a. Ride Height1. No part of the car to the rear of the front tire opening, including the exhaust, may touch theground when two (2) tires on the same side of the vehicle are deflated.”
In GT-2, 3, LITE, GCR section 9.1.2.F.7.b, remove and re-number section as follows:
“3. No part of the bodywork or chassis, to the rear of the front wheel opening, shall touch theground when both tires on the same side of the car are deflated.”
#26241 from marvin epps · Rule change · TB 19-03 (2019-03 Fastrack)
In GT2/ST, Porsche Cayman, change model years as follows:
“(05 - 11 15)”
#26250 from Grand Touring Committee · Rule change · TB 19-03 (2019-03 Fastrack)
In GT2/ST, Porsche Cayman, add to the notes as follows:
“4.0L 65mm Flat Plate Restrictor @ 2700lbs.”
#22138 from Joe Harlan · Rule change · TB 19-01 (2019-01 Fastrack)
In GT2/ST, BMW E46 M3 & E36 / BMW Z3 / BMW 5000cc V8, add to notes as follows:
“Flossman body kit is permitted as found here: http://www.racingparts-bmw.de/start/eng/start.
htm.”
#25110 from Butch Kummer · Rule change · TB 19-01 (2019-01 Fastrack)
In GT2, make changes to Appendix L. as follows:
Article 4.8: TRANS AM AMERICAN MUSCLE CLASS Previous Generations of TransAm
TA2 Cars
4.8.1: CLASSIFICATION Purpose
4.8.1.1: This class will consist of all cars meeting Appendix L or the 2017 Trans AM TA2 rulesas published by TransAm. Competitors running under the 2017 rules are required to have acopy of the rules on hand and available to presentto tech on request.
These rules are intended to summarize all previous generations of the TransAm TA2 rules
for inclusion in the Club Racing GT2 class.
4.8.2: Cost Control
4.8.2.1: The following items have cost caps. Teams must submit a “COST CONTROLINSPECTION” form prior to the team’s first race of the season (form available from the TransAm Technical Manager). Information the team must provide will include the Make; Model; Part#; Supplier contact information; and the commercially available cost.
Teams must (a) have a “COST CONTROL INSPECTION” form from the Trans Am Technical
Manager or (b) provide the Make; Model; Part #; Supplier contact information; and the
commercially available cost for the following items:Maximum Cost
Shock Absorbers $800 $850 each
Brake Calipers $500 $550 each
Brake Pads $200 $250 per axle
Wheels $500 $175 each
4.8.2.3: No titanium components are allowed. All metal components shall be steel or
aluminum.
4.8.2.4: No carbon fiber components are allowed, except for the driver seat. Only the driver
seat and rear wing may be constructed of carbon fiber.
4.8.3.1: The minimum weight for all American Muscle Class TA2 cars is 2830 pounds.
4.8.4: Body
The body rules are divided into two sections. The “American Muscle” (2010+ Camaro-Mustang Challenger) body rules are found in Article 4.8.7.1. The “Stock Car” body rulesare found in 4.8.7.2. Either body type may be used in 2013, but the stock car bodies will bephased out at some time in the future (TBD). The 2010+ Camaro-Mustang-Challenger body
rules are found in Article 4.8.4.1. The “Stock Car” body rules are found in 4.8.4.2. Either body
type may be used, but no “mixing and matching” between the two sets of rules is allowed.
4.8.4.1: American Muscle Bodies 2010+ Camaro-Mustang-Challenger Bodies
4.8.4.1.1 The following 2010+ make/model bodies are allowed:
1. Chevrolet Camaro (Howe, and ARBodies, FiveStar are approved manufacturers)
2. Ford Mustang (Howe approval pending, ARBodies, FiveStar are approved
manufacturers)
3. Dodge Challenger (no manufacturers approved at this time Howe is the approved
manufacturer)
4.8.4.1.10.1.3: The maximum wing width, including end plates, is TBD 65 5/16 inches.
4.8.4.2: Stock Car Bodies
4.8.4.2.10.2.3: The maximum wing width, including end plates, is TBD 65 5/16 inches.
(Various updates/clarifications):
4.8.5.9.1: For 2013-TBD, race cars that competed in the Trans Am 2 Race cars that were
eligible to compete in the TA2 class during 2010-2012, may continue to run the chassis/
suspension combination that was used during that time period. Cars built in 2012 meeting the2012 rules will also be allowed. Entrants must provide evidence of the rules when asked under
which the car was prepared.
4.8.6.2: American Muscle cars must compete on Goodyear TBD race tires.
TA2 cars competing as GT2 cars in Club Racing events may use any tire that fits a TA2-
compliant rim.
4.8.8: ENGINES
The “base” engine for TransAm’s American Muscle TA2 class is the GM LS3 as described
in Addendum A. This engine can be used in all body types. Other engine packages are
described in Addendums B, C and D B-X. Specific rules for these engine packages are found
in:
ADDENDUM A: American Muscle TA2 “Base” Engine
ADDENDUM B: American Muscle TA2 GM LS1 Engine
ADDENDUM C: American Muscle TA2 Traditional Carbureted Engine
ADDENDUM D: American Muscle TA2 Restricted Carbureted Engine
ADDENDUM E: Additional New American Muscle Engine Packages TA2 EFI Ford Engine
ADDENDUM F: TA2 Carbureted Ford Engine
ADDENDUM G: TA2 Dodge Engine
4.8.8.3: Engine setback is a maximum setback of TBD inches, measured from the left sidetop ball joint to the engine bellhousing flange. measured perpendicular to a line connecting
the front suspension, left and right side, lower ball-joints to the engine bellhousing flange. The
maximum setback for engines in Addendums A through F is 21.75-inches. The maximum
setback for engines in Addendum G is 24-inches.
4.8.8.4: Engine height for Addendum A through F engines is a minimum of 9.5-inches above
the ground, measured from the center of the crankshaft centerline to the ground. Engine height
for Addendum G engines is a minimum of 8.5-inches above the ground, measured from the
crankshaft centerline to the ground.
ADDENDUM A:AMERICAN MUSCLE TA2 “BASE” ENGINE:
A.3: An unmodified LS3 GM part # TBD (short), or L92 GM part # TBD (tall) intake manifold
must be used. Identically equivalent GM part number intake manifolds may also be used.These part numbers include TBD.
ADDENDUM B:AMERICAN MUSCLE TA2 GM LS1”ENGINE:
ADDENDUM C:AMERICAN MUSCLE TA2 TRADITIONAL CARBURETED ENGINE
C.5: The maximum compression ratio is 10.5 2:1.NOTE: It is Trans Am’s intention to phase out this engine category in TBD
ADDENDUM D:AMERICAN MUSCLE TA2 RESTRICTED CARBURETED ENGINE
D.7: Engine displacement can be a maximum of 362 366 cubic inches.NOTE: It is Trans Am’s intention to phase out this engine category in TBD
ADDENDUM E:ADDITIONAL NEW AMERICAN MUSCLE ENGINE PACKAGES
TA2 EFI Ford EngineSpecific rules for any new American Muscle engine packages will be established afterthe Trans Am Technical Manager has evaluated the proposed American Muscle EngineComponent Build Sheet, and determined, through engine dynamometer testing, that the newengine package does not exceed the American Muscle “Base” engine’s average power andtorque levels ov Am Technical Manager for details on the engine approvalprocess.
TA2 EFI Ford Engine
E.1: Only Spectre plenum (part # 9849), SLP air filter housing (part #21044), with Howe
air filter base (part # E147), and AC Delco air filter (part # 25042562) are approved for
competition. The air filter must be mounted on the top of the radiator air box and draw air
through the nose of the car. A single inlet tube between the air filter and throttle body must
be metal (except unions used to connect intake tubes). Nothing may direct or force air to
air filter, or housing. The filter must be installed into housing, and just the filter hanging thru
with no scoops, deflectors, or funnels directing air. Single inlet tube must be 4” OD with a
wall thickness of 0.055”-0.085”. Absolutely nothing can be located inside of the tube with the
exception of an air temperature sensor, or a mass air flow sensor. No devices, or strategies,
that attempt to alter the air flow are allowed. It is strongly suggested that any air intake
systems, or alteration, that competitors would like to run be approved in writing by the TA2
Technical Director.
E.2: An unaltered Governor 1” Base Plate (Part #: ALL26060) with unaltered 1.250” inserts
(Part #: ALL26066) must be in place during all practice, qualification, and race sessions.
Other than 0.063” normal gaskets, no part other than the Governor Plate 1” spacer may
be placed between the throttle body base and the intake manifold. It is mandatory that two
throttle return springs be used.
E.3: Fuel injectors must be a Bosch part # 0 280 158 051, or GM 12576341, 42 lbs/hr @ 58
PSIG. The fuel pressure must be set to 58 PSIG.
E.4: The Ford EFI Kit (P/N: 50P-0015) must be used. This kit contains an EFI intake
manifold, Ilmor part # 50P-0019, fuel rails and brackets, and ignition coils with brackets/
spacers. Also included in the kit are the fuel pressure sensor, oil pressure sensor, water
temperature sensor, air temperature sensor, MAP sensor, EPM, injectors, throttle body, and
engine wiring harness. Individual parts from the kit will also be available for sale from Koury
Race Engines . No modifications to the intake manifold, or other components, are allowed. A
crank triggering sensor may replace the EPM.
E.5: Dart Pro 1, CNC ported aluminum cylinder heads, part # 13072040 (with 5/16” valve
guides) must be used. Additional port modification (porting/polishing) is not allowed. The Dart
(Tech Sheet H33, 3/31/15) supplied five-angle intake valve seat (32 – 45 – 60 – 70 - 80 deg.)
and exhaust seat (37 - 45 deg. - radius) may be used. As an alternative, a three-angle valve
job with a bottom cut of 60-degrees having a maximum of 0.250” from the head of the valve
seat to the bottom of the 60-degree bottom cut is allowed. No grinding in the combustion
chamber bowl area is allowed. The minimum combustion chamber volume is 62cc (+/- 2-cc).
No interior, or exterior, coatings are permitted. Valve covers are unrestricted. Intake rocker
arms must be Comp Cams part # 1834 with a 1.7:1 ratio. Exhaust rocker arms must be
Comp Cams part # 1832 with a 1.6:1 ratio. Intake valves may be REV part # CL8003, Manley
part #11712, or Ferrea part # 2341P. The intake valves must have a 2.08” head diameter,
and 5/16” stem diameter. Exhaust valves must be REV part # CL80031171, Manley part
#11231, or Ferrea part # 2300 with a 1.60” head diameter and 5/16” stem diameter. The
valves may not be modified. The valve springs must be PSI part # LS1511ML, # LS1717ML,
or PAC part #1207X. Any retainers and locks may be used.
E.6: The maximum compression ratio is 10.8:1.
E.7: The spec “Trans Am 2” Ford camshaft must be used. Prior to initial use, each cam must
be measured by the TA2 TECHNICAL DIRECTOR. A Trans Am serial number will then
be applied. The cam must be ordered through ,Koury Race Engines (386.547.4311). The
hydraulic roller lifters must be Crain, part #36532, or Johnson part # 2212SBR – standard
travel.
E.8: An aluminum engine block, Dart part # 31345295, or Ford Racing part # M6010-Z35192
must be used. The engine bore is 4.125”. Cylinders may be honed as part of the normal
freshening procedure, but the engine displacement cannot exceed 376 cubic inches (0.010”
overbore).
E.9: The following crankshafts, with a 3.500” stroke, are allowed: Callies part # EFG-71T-DS,
Scat part # 4351c16-2, or Molnar part # 351-3500HB6F-RN. The crankshaft may not be
modified. The minimum weight is 47 pounds.
E.10: Mahle pistons, piston pins, and rings (older part # ‘s; SBF245125FO6, SBF245130FO6,
or SBF245135FO6 or the newer part #’s 930244425, 930244428, 930244430, 930244432,
or 930244435) must be used. As of May 2018, a Mahle Spec TA2 piston part #197722725-
197722735 should be used on new and rebuilt engines. No modifications of the pistons
(including gas porting) are allowed. The connecting rods must be 6.2” center-to-center, and
must be Callies Compstar part # CSA6200DS2A2AH, Scat part # 2-ICR6200-7/16A, Oliver
part # C6200STUL8, or Molnar part # FH6200NLB8-A. The connecting rods may not be
modified.
E.11: Aftermarket fasteners, including rod bolts are allowed (no titanium).
E.12: The oil pan is unrestricted, but the oiling system may not exceed four-stages (three
scavenge, one pressure).
E.13: All Ford engines must use the Trans Am AEM 508 Infinity ECU must be used (AEM
part # 30-7108TA). The ECU is only available from Trans Am, or approved TA2 engine
builders, and will come loaded with the current TA2 Ford “spec” calibration. As of June 1,
2018, the file for the spec calibration is; TA2-REV08-FORD-KATECH (created 5/17/2018).
Fuel and ignition calibration is locked from 3500-6800 RPM. At RPM below 3500, engine
builders and team tuners will be given some control. Traction Control is locked out, and the
engine speed limit is set at 6800 RPM. The AEM TA2 chassis wiring harness (AEM part #
36-3820), and AEM Ford engine wiring harness (AEM part # 36-3826), must be used. The
harnesses are only available from Trans Am, or approved TA2 engine builders.
ADDENDUM F:
TA2 Carbureted Ford Engine
F.1: Air cleaners are required at all times. The air filter housing must be centered on the
carburetor and all air entering the engine shall pass through the filter. The air filter element
may not exceed 15.00 inches in diameter and the maximum element height is 4.00 inches.
F.2: An unaltered Governor 1” Base Plate (Part #: ALL26060) with unaltered 1.250” inserts
(Part #: ALL26066) must be in place during all practice, qualification, and race sessions.
Other than 0.063” normal gaskets, no part other than the Governor Plate 1” spacer may be
placed between the carburetor and the intake manifold. It is mandatory that two throttle return
springs be used.
F.3: The carburetor must be a Holley, 650 CFM, double pumper, part #0-80541.The
carburetor must be completely unmodified except for changing of jets and changes (safety
wire or epoxy) to keep the booster nozzles from falling into the intake manifold. No porting,
polishing or addition of any other material is permitted.
F.4: Dart Pro 1, CNC ported aluminum cylinder heads, part # 13072040 (with 5/16” valve
guides) must be used. Additional port modification (porting/polishing) is not allowed. The Dart
(Tech Sheet H33, 3/31/15) supplied five-angle intake valve seat (32 – 45 – 60 – 70 - 80 deg.)
and exhaust seat (37 - 45 deg. - radius) may be used. As an alternative, a three-angle valve
job with a bottom cut of 60-degrees having a maximum of 0.250” from the head of the valve
seat to the bottom of the 60-degree bottom cut is allowed. No grinding in the combustion
chamber bowl area is allowed. The minimum combustion chamber volume is 62cc (+/- 2-cc).
No interior, or exterior, coatings are permitted. Valve covers are unrestricted. Intake rocker
arms must be Comp Cams part # 1834 with a 1.7:1 ratio. Exhaust rocker arms must be
Comp Cams part # 1832 with a 1.6:1 ratio. Intake valves may be REV part # CL8003, Manley
part #11712, or Ferrea part # 2341P. The intake valves must have a 2.08” head diameter,
and 5/16” stem diameter. Exhaust valves must be REV part # CL80031171, Manley part
#11231, or Ferrea part # 2300 with a 1.60” head diameter and 5/16” stem diameter. The
valves may not be modified. The valve springs must be PSI part # LS1511ML, # LS1717ML,
or PAC part #1207X. Any retainers and locks may be used.
F.5: The maximum compression ratio is 10.8:1.
F.6: The spec “Trans Am 2” Ford camshaft must be used. Prior to initial use, each cam must
be measured by the TA2 TECHNICAL DIRECTOR. A Trans Am serial number will then
be applied. The cam must be ordered through ,Koury Race Engines (386.547.4311). The
hydraulic roller lifters must be Crain, part #36532, or Johnson part # 2212SBR – standard
travel.
F.7: An aluminum engine block, Dart part # 31345295, or Ford Racing part # M6010-Z35192
must be used. The engine bore is 4.125”. Cylinders may be honed as part of the normal
freshening procedure, but the engine displacement cannot exceed 376 cubic inches (0.010”
overbore).
F.8: The following crankshafts, with a 3.500” stroke, are allowed: Callies part # EFG-71T-DS,
Scat part # 4351c16-2, or Molnar part # 351-3500HB6F-RN. The crankshaft may not be
modified. The minimum weight is 47 pounds.
F.9: Mahle pistons, piston pins, and rings (older part # ‘s; SBF245125FO6, SBF245130FO6,
or SBF245135FO6 or the newer part #’s 930244425, 930244428, 930244430, 930244432,
or 930244435) must be used. As of May 2018, a Mahle Spec TA2 piston part #197722725-
197722735 should be used on new and rebuilt engines. No modifications of the pistons
(including gas porting) are allowed. The connecting rods must be 6.2” center-to-center, and
must be Callies Compstar part # CSA6200DS2A2AH, Scat part # 2-ICR6200-7/16A, Oliver
part # C6200STUL8, or Molnar part # FH6200NLB8-A. The connecting rods may not be
modified.
F.10: Aftermarket fasteners, including rod bolts are allowed (no titanium).
F.11: The oil pan is unrestricted, but the oiling system may not exceed four-stages (three
scavenge, one pressure).
F.12: The engine speed rev limit is set at 6800 RPM. <also placeholder for ignition specs
coming from Tony Ave>
ADDENDUM G:
TA2 Dodge Engine
G.1: Only a SLP air filter housing (part #21044), with Howe air filter base (part # E147),
and AC Delco air filter (part # 25042562) are approved for competition. The air filter must
be mounted on the top of the radiator air box and draw air through the nose of the car. A
Single Inlet Tube between the air filter and throttle body must be metal (except unions used
to connect intake tubes). Nothing may direct, or force air, to the air filter, or housing. The filter
must be installed into housing, with just the filter hanging through with no scoops, deflectors
or funnels directing air. The single inlet tube must be 4” OD with a wall thickness of 0.055”-
0.085”. Absolutely nothing can be located inside of the tube except for an air temperature
sensor, or a mass air flow sensor. No devices, or strategies that attempt to alter the air flow
are allowed. It is strongly suggested that any air intake systems or alteration that competitors
would like to run be approved by the TA2 Technical Director.
G.2: The throttle body must be a F.A.S.T. 87mm throttle body (part #54088). The throttle
body may not be modified. It is mandatory that two throttle return springs be used.
G.2.1: A 2.150” diameter flat plate restrictor must be in place during all practice,
qualification, and race sessions. The restrictor must be mounted in the inlet side of the
throttle body.
G.2.2: Fuel injectors must be Chrysler, part # 05038337AA. The fuel pressure must be set
to 75 PSIG.
G.3: An intake manifold assembly, (PREFIX part # ARR-9105) must be used. It may not be
modified.
G.4: Aluminum cylinder head assemblies (PREFIX part #’s ARR-6556HO (right) and
ARR 6555HO(left) must be used. Porting and/or polishing is not allowed. No more than a
three-angle valve job with a bottom cut of 60-degrees is permitted. A maximum of 0.250”
from the head of the valve seat to the bottom of the 60-degree bottom cut is allowed. No
grinding in the combustion chamber bowl area is allowed. No interior or exterior coatings
are permitted. Valve covers are unre-stricted. Rocker arm assemblies (Chrysler part #’s
53021552AA-intake, and 53021553AA-exhaust) with a 1.68:1 ratio must be used. Intake and
exhaust valves (Chrysler part # ARR-CAS-1340, and # 05038332AB) must be used. The
intake valve diameter is 2.14” and the exhaust valve diameter is 1.65”. Both valves have a
7.95mm stem diameter. Any valve springs, retainers, and locks are allowed.
G.5: The maximum compression ratio is 11.0:1.
G.6: The “spec” Trans Am 2 camshaft assembly (PREFIX part # ARR-12674-694) must be
used. Prior to use, each cam must be measured by the TA2 TECHNICAL DIRECTOR. A
Trans Am serial number will then be applied.
G.7: An aluminum cylinder block (PREFIX part # ARR-TA2-3897) must be used. The stock
engine bore is 4.095”. Cylinders may be honed as part of the normal freshening procedure,
but the engine displacement cannot exceed 392 cubic inches.
G.8: A crankshaft (PREFIX part # ARR-TA2-8339) with a 3.720” stroke must be used. The
minimum weight is 55 pounds (with tone wheel and bolts).
G.9: Pistons assemblies (piston, pin, rings) (PREFIX part # ARR-197804695) must be used.
Connecting rods (PREFIX part # ARR-X-DH6200TNB8; 6.2” length) must be used.
G.10: Aftermarket fasteners, including rod bolts are allowed (no titanium).
G.11: The oil pan is unrestricted, but the oiling system may not exceed five-stages (four
scavenge, one pressure).
G.12: All Dodge Hemi engines must use the Trans Am AEM 508 Infinity ECU must be used
(AEM part # 30-7108TA) The ECU is only available from Trans Am or approved TA2 engine
builders and will come loaded with the TA2 Dodge Hemi “spec” calibration. Fuel and ignition
calibration is locked from 3500-6800 RPM. At RPM below 3500 engine builders and team
tuners will be given some control. Traction Control is locked out, and the engine speed limit
is set at 6800 RPM. The AEM TA2 chassis wiring harness (AEM part # 36-3820) and AEM
Dodge Hemi engine wiring harness (AEM part # 36-3825) must be used. The harnesses are
only available from Trans Am or approved TA2 engine builders.
SUMMARY OF ENGINE COMPLIANCE PARAMETERS
There are items specific to each engine option, but here are the ones common to all that can
be verified by non-invasive means:
Addendum / Description Max cubic inches Restrictor Max Compression Max RPM
A: TA2 “Base” Engine 378 2.250” 10.7:1 6800
B: TA2 GM LS1 Engine 350 None 10.1:1 6800
C: TA2 Traditional Carbureted Engine 358 None 10.5.1 7000
D: TA2 Restricted Carbureted Engine
. with “spec” 650 Holley
. with any other carburetor
366 None 9.5:1
7000
6500
E: TA2 EFI Ford Engine 376 1.250” 10.8:1 6800
F: TA2 Carbureted Ford Engine 376 1.250” 10.8:1 6800
G: TA2 Dodge Engine 392 2.150” 11.0:1 6800
#25539 from Mark Uhlmann · Rule change · TB 19-01 (2019-01 Fastrack)
In GT2, classify the BMW 1 Series (E82) as follows:
GT Cars -Model Years Body Style Drive-
line
Wheel-
base (in)
Notes
1 Series (E82) 08-12 2dr RWD 104.7
A specification table follows in the original; it is not shown here.
#25545 from marvin epps · Rule change · TB 19-01 (2019-01 Fastrack)
In GT2/ST, Porsche Cayman (05-11), Make changes to weight and add to notes as follows:2875 2800
“2950 lbs w/3.8L motor built to STO spec. 2850 lbs w/X51 spec motor as delivered as a sealed
motor.”
#25716 from Adrian Wlostowski · Rule change · TB 19-01 (2019-01 Fastrack)
In GT2/ST, classify the Ford Mustang (05-) as follows:
GT2-ST Maximum
Displacement Minimum Weight Restrictor Notes
Ford Mustang
(05-)
5200 3400 2 X 41mm Flat
Plate Restrictor
Ford Racing 5.2l
“Aluminator” crate
engine part #
M-6007-A52XS
#25765 from Grand Touring Committee · Rule change · TB 19-01 (2019-01 Fastrack)
exhaust note
In GT2, Porsche 996/997.1 GT3 Cup, add to the notes as follows:
“3.6L flat six. 2900 lbs. Cars must be prepared in accordance with the appropriate model/year
Porsche factory 911 GT3 Cup parts catalog/service manual.”
In GT2, Porsche 996/997.1 GT3 Cup, delete the notes as follows:
“Aftermarket exhaust header is allowed (996 only). Paddle shift system allowed with 100 lb.
weight penalty.”
#25806 from David Woodle · Rule change · TB 19-01 (2019-01 Fastrack)
In GT2/ST, Ford Mustang FP350S (2018-), make changes to weight and add to notes as
follows:3500 3400
“Springs and shocks are free. Fuel cell allowed. Alternate drive shaft permitted. Wheels are
free. Header and exhaust permitted. Alternate rotor and hat permitted 380 mm max. Alternate
shifter permitted. Lexan windows permitted.”
#25842 from Scotty B White · Rule change · TB 19-01 (2019-01 Fastrack)
In GT2/ST, classify the Ford Mustang (05-) as follows:
GT2-ST Maximum
Displacement Minimum Weight Restrictor Notes
Ford Mustang
(05-)
3500 3200 41mm TIR Eco Boost option as
delivered from the factory,
including turbo and ECU.
Dry Sump allowed.
#26024 from Glen Jung · Rule change · TB 19-01 (2019-01 Fastrack)
In GT2, Mazda RX7, change notes as follows:
Downing GTS body kit allowed with 75 lbs. weight increase.
#26034 from Club Racing Board · Rule change · TB 19-01 (2019-01 Fastrack)
In GTX, FIA GT3, classify the Audi R8, BMW Z4, and Ferrari 488 Challenge as follows:
FIA GT3 -
Make Homologation Model Restrictor
mm Weight (lbs) Notes
Acura GT3- 047 NSX (2) 35 TIR 3015
Aston Martin GT3-O32 Vantage (2) 41.5 2980
Audi GT3-017 R8 (2) 40 TIR 2900
Audi GT3-038 R8 LMS (2) 39 TIR 2980
Bentley GT3-035 Continental (2) 38 TIR 3070
BMW GT3-043 M6 (2) 34 TIR TBD
BMW GT3-023 Z4 70 2800
Chevrolet GT3-045 Corvette C7 52 3070
Dodge GT3-036 Viper (2) 39 3120
Ferrari GT3-029 458 (2) 40 3025
Ferrari GT3-044 488 (2) 35 TIR 3025
Lamborghini GT3-040 Huracan (2) 39 TIR 3015
Mclaren GT3-037 650S (2) 36 TIR 2915
Mercedes GT3-042 AMG GT (2) 34.5 TIR 3090
Porsche GT3-041 991 (2) 41.5 2960
Nissan GT3-030 GT-R (2) 40 TIR 3050
A specification table follows in the original; it is not shown here.
#40467 from Thomas Haronian · Taken care of · Minutes (2026-10 Fastrack)
Please see RRCC response to Letter #40326 in the Sept 2026 Fastrack.
#40339 from Glenn Kurkjian · Taken care of · Minutes (2026-10 Fastrack)
Please see RRCC response to Letter #40326 in the Sept 2026 Fastrack.
#39996 from Bruce Bergeron · Taken care of · Minutes (2026-09 Fastrack)
Please see RRCC response to letter #39995 in the current Fastrack.
#39932 from Ray Houle · Taken care of · Minutes (2026-09 Fastrack)
Please see RRCC response to letter #39995 in the current Fastrack.
#39961 from Dennis Troemel · No action required · Minutes (2026-05 Fastrack)
The Cars "Spec Line" takes precedence over what may be written in the GCR.
#39487 from Joe Stadelmann · Taken care of · Minutes (2026-05 Fastrack)
Please see response to letter #38584 in current Fastrack.
#39156 from Brian Goldburg · Taken care of · Minutes (2026-05 Fastrack)
Please see response to letter #38584 in current Fastrack.
#38568 from KunWoo Park · Taken care of · Minutes (2026-05 Fastrack)
Please see response to letter #38584 in current Fastrack.
#39863 from Grand Touring Committee · Recommended to the Board · Minutes (2026-03 Fastrack)
In GCR, Section 9.1.2.F.7.l, change as follows and re-letter:
"(Effective 3/1/2026) l. GT2 Rules Concerning Alternate Weights and SIRs 1. Traditional GT2 cars that are currently required torun an SIR may run unrestricted induction with a 350 lb. weight penalty. This weight penalty is to be added prior to any “add-on”penalties, such as sequential shifting, IRS, etc."
#39562 from Tom Scarpello · No action required · Minutes (2026-02 Fastrack)
With the information that you have provided, 3300 lbs. with a 71mm flat plate restrictor as shown in the December 2025 GCR is
listed. Your 3500 lbs. weight question cannot be found.
#38023 from Andrew Aquilante · Taken care of · Minutes (2026-02 Fastrack)
Please see letter #39537 in January Fastrack.
#38972 from Richard Grant · No action required · Minutes (2026-01 Fastrack)
This car is already classified in GT2-ST.
#38496 from Culbertson Brian · Not recommended · Minutes (2025-08 Fastrack)
Thank you for your letter. All SCCA classes have at their root a class philosophy that does, for the most part, govern the class, it is
not applied as an absolute and there are exceptions. The CRB strives to always consider class philosophy when evaluating
requests from competitors. When submitting requests members should also consider their requests’ impact on the class
philosophy and if it is a reasonable request.
This request for classifications of a GM engine in a Nissan exceeds the class philosophy. The combination requested is permitted
in GTX.
#38495 from Terrence Gilles · Taken care of · Minutes (2025-08 Fastrack)
Thank you for your letter. Please see CRB response to letter #38496 in current Fastrack.
#38494 from Brian Goldburg · Not recommended · Minutes (2025-08 Fastrack)
Thank you for your letter. Louvers in hood or elsewhere are only permitted in accordance with current GT2 rules.
#38484 from Robert Lentz · Taken care of · Minutes (2025-08 Fastrack)
Thank you for your letter. Please see CRB response to letter #38496 in current Fastrack.
#38425 from Jorge A Nazario · Not recommended · Minutes (2025-07 Fastrack)
Thank you for your letter. Please see Fastrack response to letter #37950. There was insufficient data collected at the NOLA and
Road Atlanta Super Tour event, however the CRB will continue to collect and make adjustments as necessary.
#38375 from Joseph Zanavich · Not recommended · Minutes (2025-07 Fastrack)
Thank you for your letter. The photo does not appear to be GT2 Panoz Spec-car-compliant. With the exception of the allowed
Spec car rules, if an aftermarket part is available with a part number, it may be submitted for approval.
#38284 from Andrew Aquilante · No action required · Minutes (2025-07 Fastrack)
Thank you for your letter. Please see Fastrack response to letter #37950 in current Fastrack. There was insufficient data collected
at the NOLA and Road Atlanta Super Tour event, however the CRB will continue to collect and make adjustments as necessary.
#38275 from Michael Quattlebaum · Not recommended · Minutes (2025-07 Fastrack)
Thank you for your letter. Please see response to letter #37763 in June Fastrack.
#37950 from Armen Megregian · Not recommended · Minutes (2025-07 Fastrack)
Thank you for your letter. The balance of performance (BOP) is based on the performance potential of any car in any given class.
#37144 from Terry Gilles · Not recommended · Minutes (2025-06 Fastrack)
Thank you for your letter. Car is permitted in GTX, but not allowed in GT2 due to class philosophy.
#37462 from Grand Touring Committee · No action required · Minutes (2025-01 Fastrack)
Thank you for your letter. This letter had a 2nd request asking for a Ford Coyote V8! I have made contact for more information.
#37283 from Kevin Park · No action required · Minutes (2025-01 Fastrack)
Thank you for your letter. Car is currently classified in GT2 and may also be classifying in T1 at a future date.
#37106 from Brian Goldburg · Taken care of · Minutes (2025-01 Fastrack)
Thank you for your letter. Please see CRB response to your letter #36686 in current Fastrack.
#36558 from Jorge A Nazario · Not recommended · Minutes (2024-10 Fastrack)
Thank you for your letter. Your request cannot be recommended at this time! The CRB will continue to monitor the SCCA
collected Data as well as race results.
#36454 from Michael Quattlebaum · No action required · Minutes (2024-10 Fastrack)
Thank you for your letter. A competition wet is currently legal with a 100 lb. weight penalty.
#36666 from Grand Touring Committee · Recommended to the Board · Minutes (2024-09 Fastrack)
In GCR, Section Appendix K.1 2012 STO Rules, add the following:
"K. Approved slicks (competition wets) with 100 lb. penalty."
#36511 from Ken Gassin · Recommended to the Board · Minutes (2024-09 Fastrack)
In GCR, Section 9.1.2.F.7.k., change the following:
"k. GTLite Rules Concerning Alternate Weights, Chokes and SIRs"
In GCR, Section 9.1.2.F.7.k., add the following:
"Competitors running the alternate choke option must display the word "CHOKE" as well as size in mm next to the weight."
#36475 from Lou Gigliotti · Not recommended · Minutes (2024-09 Fastrack)
Thank you for your letter. This request is not recommended at this time. The performance of the TA2 cars is constantly being
monitored by the CRB.
#36097 from Jonathan Greco · Not recommended · Minutes (2024-07 Fastrack)
Thank you for your letter. The CRB believes there are numerous ways to duct cold air without going through the
headlight opening.
#35898 from Bob Monette · Taken care of · Minutes (2024-07 Fastrack)
Thank you for your letter. Please see letter #36235 in current Fastrack Technical Bulletins.
#35856 from Kristofer Olson · No action required · Minutes (2024-05 Fastrack)
Thank you for your letter. Please see CRB response to your request letter #35009 in current Fastrack.
#35838 from Kristofer Olson · No action required · Minutes (2024-05 Fastrack)
Thank you for your letter. Please see the CRB response to your request letter #35009 in current Fastrack.
#35747 from Andrew Aquilante · No action required · Minutes (2024-05 Fastrack)
Thank you for your letter and for your comments.
#33522 from Dominic Starkweather · Not recommended · Minutes (2024-05 Fastrack)
Thank you for your letter. The CRB believes that this car is properly classed in GTX.
#35457 from Gordon Leslie · Not recommended · Minutes (2024-03 Fastrack)
Thank you for your letter. This request is outside of the GT body work allowances. For reference: Per GTCS the wing is allowed
to be roof height no further rearward of the rear bumper.
#35295 from Alex Peitz · Not recommended · Minutes (2024-01 Fastrack)
Thank you for your letter. The CRB currently have a one year old C8 request in limbo because the GT2-ST rules create
running issues. So the CRB is requesting that this car stay in T1 until which time the C8 rules get sorted out. You could
also request to be classified GT1-ST.
#35232 from John Hansen · No action required · Minutes (2024-01 Fastrack)
Thank you for your letter. Please see the CRB's response to letter #35124 in current Fastrack.
#35228 from Jonathan Stalzer · Not recommended · Minutes (2024-01 Fastrack)
Thank you for your letter. As an already classified SCCA class with rules of their own the Bspec cars do not comply with the GTL
rules.
#35207 from Lou Gigliotti · Not recommended · Minutes (2024-01 Fastrack)
Thank you for your letter. The CRB feels that the weight are correct and will continue to monitor SCCA supplied Data. What you
are asking for is a complete shift of BOP of the GT2-ST class and the CRB feels that this drastic of an action is not justified.
#35196 from Erik Madsen Madsen · Not recommended · Minutes (2024-01 Fastrack)
Thank you for your letter. The CRB feels that this request is inappropriate for the class.
#35124 from John Hansen · Not recommended · Minutes (2024-01 Fastrack)
Thank you for your letter. The engine in this request is felt by the CRB to be outside the parameters of GT2.
#35118 from Ken Gassin · Member feedback requested · Minutes (2024-01 Fastrack)
Thank you for your resume. The GTAC would like to accept your offer to join the GT Advisory Committee.
DATE: December 20, 2023
#35078 from Michael MCALEENAN · Not recommended · Minutes (2024-01 Fastrack)
Thank you for your letter. The CRB believes that this car is already appropriately classed in T1. With your requested spec's we
would classify this car in GTX. Please review the GTX rules and write a letter requesting GTX classification.
#34954 from Steve Davis · Not recommended · Minutes (2024-01 Fastrack)
Steve- The "data" that is compiled from the SOLO boxes is available only to the Data Team who prepare reports for review by
the AC's and CRB. We do not believe that putting that information into the public domain would result in any appreciable
improvement in the road racing program. Thank you for your interest in the program.
#35170 from David Gomberg · Taken care of · Minutes (2023-12 Fastrack)
Thank you for your letter. Please see letter #34453 in current Fastrack.
#35160 from Grand Touring Committee · Recommended to the Board · Minutes (2023-12 Fastrack)
In GCR, Section 9.1.2.15.D.1., change as follows:
"The wing shall be mounted to the trunk/deck lid trunk lid upper surface / deck lid upper surface with 2 mounting brackets. Each
mounting bracket shall attach to the wing at a point that is at least 2.0 between 4.0 and 30.0 inches inboard of
endplates, including the entire exposed vertical structure. The wing, and the portion of the mounting brackets located externally
to the trunk/deck lid trunk lid upper surface / deck lid upper surface, may only be reinforced by a diagonal strut having no
aerodynamic effect, and/or by affixing the external parts of the brackets within the trunk/cargo area. The internal parts of the
brackets may protrude through the trunk/deck lid trunk lid upper surface / deck lid upper surface to allow the two parts of each
bracket to be fastened together. The exposed side view portion of the wing mounting brackets / posts shall not exceed 100
square inches each. Curved brackets / posts will be measured as if they are in a flat plane as viewed from the side. Mounting
brackets / posts must have no additional aerodynamic purpose."
#34901 from CJ Cramm · No action required · Minutes (2023-12 Fastrack)
Thank you for your letter. TA2 in GT2, all and including current year TA2 rules must run at 2930 lbs.
#34906 from Robert Kacprowicz · Not recommended · Minutes (2023-11 Fastrack)
Thank you for your letter. This car is classified correctly. We will continue to monitor the SCCA collected DATA.
#34819 from Karl Heath · Not recommended · Minutes (2023-11 Fastrack)
Thank you for your letter. The CRB would like to invite you to take another look at the T1 rules for your car as there have been
many recent changes to the T1 class rule sets.
#34713 from Philip Di Pippo · No action required · Minutes (2023-11 Fastrack)
Thank you for your letter. Please see letter #34815 in current Fastrack.
#34593 from William Moore · Not recommended · Minutes (2023-09 Fastrack)
Thank you for your letter. The CRB will continue to monitor the TA2 class by means of collected SCCA data as well as official
qualifying and race results.
#34166 from Mitchell Bender · Not recommended · Minutes (2023-06 Fastrack)
Thank you for your letter. Not Recommended at this time. The CRB will continue to monitor the on track performance of TA2 as
well as the SCCA collected data.
#34034 from Jonathan Start · Not recommended · Minutes (2023-06 Fastrack)
Thank you for your letter. The CRB will continue to monitor the GT2-ST class as well as available SCCA collected data.
#33795 from Paul Easy · No action required · Minutes (2023-06 Fastrack)
Thank you for your letter. The letter writer has not responded to the committee’s previous requests for information.
#34013 from William Moore · Not recommended · Minutes (2023-05 Fastrack)
Thank you for your letter. TA2 cars in GT2 are classified correctly. The CRB will continue to monitor the class and available Data.
#33911 from Tim Myers · No action required · Minutes (2023-05 Fastrack)
Thank you for your letter and your comments.
#33828 from Marcos Vento · Not recommended · Minutes (2023-05 Fastrack)
Thank you for your letter. The CRB will continue to monitor the class.
#33631 from Scott Simpson · Not recommended · Minutes (2023-03 Fastrack)
Thank you for your letter. Your requested Porsche engine displacement is too large for a turbo application in the GT2 or GT2-ST
class.
#32951 from Andrew Aquilante · Taken care of · Minutes (2023-03 Fastrack)
Thank you for your letter. Please see letter #32274 in current Fastrack.
#32397 from Matthew Miller · Taken care of · Minutes (2023-03 Fastrack)
Thank you for your letter. Please see letter #32274 in current Fastrack.
#32276 from Tim Myers · Taken care of · Minutes (2023-03 Fastrack)
Thank you for your letter. Please see letter #32274 in current Fastrack.
#32275 from Tim Myers · Taken care of · Minutes (2023-03 Fastrack)
Thank you for your letter. Please see letter #32274 in current Fastrack.
#32274 from Tim Myers · Taken care of · Minutes (2023-03 Fastrack)
Thank you for your letter. Most of the GT4 cars classed in GT2 have been moved into T1. A few older lower performance GT4
classifications have remained in GT2-ST.
#33635 from Ian Barberi · Not recommended · Minutes (2023-02 Fastrack)
Thank you for your letter. Your request is not consistent with GT2-ST class philosophy.
#33602 from Nathan McBride · Not recommended · Minutes (2023-02 Fastrack)
Thank you for your letter. It is not recommended for GT2 to be added to GT1 w/GTX rules for Porsche 992 @2950lbs. Please see
letter #33730 in current Fastrack.
#33510 from Michael McAleenan · Not recommended · Minutes (2023-02 Fastrack)
Thank you for your letter. This car exceeds GT2-ST performance perimeters. The CRB suggest that you request classification in
GTX.
#33330 from Luis Rivera · No action required · Minutes (2023-02 Fastrack)
Thank you for your letter. Please see the response to letter #33080 in current Fastrack.
#33112 from Sterling Cole · No action required · Minutes (2023-02 Fastrack)
Thank you for your letter. Please response to letter #33080 in current Fastrack.
#33080 from Luis Rivera · Not recommended · Minutes (2023-02 Fastrack)
Thank you for your letter. As requested however a BW7670 or Garrett G30-60 w/46mm TIR may be used. In addition to these
choices, alternate turbos with similar HP capacity may be considered. Please see letter #33729 in current Fastrack.
#33392 from Joe Aquilante · No action required · Minutes (2023-01 Fastrack)
Thank you for your letter. Please see letter #33342 in current Fastrack.
#33329 from Kevin Allen · Recommended to the Board · Minutes (2022-12 Fastrack)
In Grand Touring Category Specifications, GCR Section 9.1.2.F.7.b.15.E.2, change as follows:
"Regardless of front, rear or mid-engine placement, flat underbody panel are permitted. Underbody panels may start behind thefront wheel openings. A minimum engine opening of 12' front to back and 14" side to side must remain open."
#33170 from Peter Zekert · Recommended to the Board · Minutes (2022-12 Fastrack)
In GT-2, 3, LITE CATEGORY SPECIFICATIONS, GCR section 9.1.2.F.7.n.4.D, add as follows:
"Carburetors shall incorporate a butterfly-type throttle plate for engine speed control. For GTLite only: Carburetors shall
incorporate a butterfly or slide-type throttle plate for engine speed control."
#33169 from Peter Zekert · Not recommended · Minutes (2022-11 Fastrack)
Thank you for your letter. The CRB feels that the current method of competitors requesting an alternate wheel base be added
to their "spec line" is the best way to deal with this!
#33095 from Philip DI Pippo · No action required · Minutes (2022-11 Fastrack)
Thank you for your letter. In all SCCA classes a race car is weighed with driver! When a new classification is created, a nominal
175 lbs. is added to the base weight to compensate for the drivers weight.
#32702 from Philip Di Pippo · No action required · Minutes (2022-11 Fastrack)
Thank you for your letter. Please see letter #33076 in September 2022 Fastrack.
#32794 from Scotty B White · Not recommended · Minutes (2022-10 Fastrack)
Thank you for your letter. The CRB will continue to monitor the SCCA collected data for GT2-TA2.
#32699 from Philip Di Pippo · No action required · Minutes (2022-10 Fastrack)
Thank you for your letter. Please see letter #33076 in September 2022 Fastrack.
#32681 from Evan Slater · Not recommended · Minutes (2022-10 Fastrack)
Thank you for your letter. Every approved GT2 turbo engine must run the same approved BW 7670 turbo.
#32932 from Thomas Herb · No action required · Minutes (2022-09 Fastrack)
Thank you for your letter. Please see letter #32803 in current Fastrack.
#32910 from Robert Weston · Not recommended · Minutes (2022-09 Fastrack)
Thank you for your letter. The car referenced in your request would have to be built to conform to all GT2-ST rules.
#32837 from Andrew Aquilante · Not recommended · Minutes (2022-09 Fastrack)
Thank you for your letter. The wording as shown in 9. Cars and Equipment: 9.3.35 is satisfactory wording for all GT car mirror
placement if used and enforced!
#32815 from Greg Anthony · Not recommended · Minutes (2022-09 Fastrack)
Thank you for your letter. The CRB will continue to monitor SCCA collected data for all of the different "class with-in a class" in
GT2.
#32809 from Mark Boden · No action required · Minutes (2022-09 Fastrack)
Thank you for your letter. Please recent response to letter #32803 in current Fastrack.
#32803 from Patrick Womack · Not recommended · Minutes (2022-09 Fastrack)
Thank you for your letter. The CRB will continue to monitor SCCA collected data for all of different "class with-in a class" GT2
cars.
#32474 from Tristan Littlehale · No action required · Minutes (2022-09 Fastrack)
Thank you for your letter. Please see response to letter #32682 in August 2022 Fastrack.
#32353 from Andrew Aquilante · No action required · Minutes (2022-09 Fastrack)
Thank you for your letter. The CRB is working on a new GT4/GT2 Table to be implemented January 2023.
#32687 from Dan Mayer · Not recommended · Minutes (2022-08 Fastrack)
Thank you for your letter. Your current 2.7L engine does not appear to be built to take advantage of the full GT rules.
#32683 from Tony Colicchio · Taken care of · Minutes (2022-08 Fastrack)
Thank you for your letter. Please see letter #32682 in current Fastrack.
#32505 from Sean Wheeler · Taken care of · Minutes (2022-08 Fastrack)
Thank you for your letter. Please see response to letter #32457 posted in the June Fastrack.
#32479 from Ian Barberi · Taken care of · Minutes (2022-08 Fastrack)
Thank you for your letter. Please see response to letter #32457 posted in the June Fastrack.
#32476 from Tristan Littlehale · Taken care of · Minutes (2022-08 Fastrack)
Thank you for your letter. Pease see response to letter #32457 posted in the June Fastrack.
#32444 from Tony Colicchio · Taken care of · Minutes (2022-08 Fastrack)
Thank you for your letter. Please see letter #32682 in current Fastrack.
#32643 from Greg Anthony · Taken care of · Minutes (2022-07 Fastrack)
Thank you for your letter. The CRB will install data boxes on these cars to so that their performance may be monitored.
#32457 from Tony Colicchio · Not recommended · Minutes (2022-06 Fastrack)
Thank you for your letter. This request is not recommended. GT2 has a different set of rules from GT2/ST etc. Additionally, to
clarify your statement, the Porsche cup cars are a "Spec" car within the GT2 class.
#32443 from Tony Colicchio · No action required · Minutes (2022-06 Fastrack)
Thank you for your letter. Must be exact copies of OE. Please furnish manufacturer and part numbers for consideration.
#32442 from Alex McBain · Not recommended · Minutes (2022-06 Fastrack)
Thank you for your letter. Not consistent with GT2 rules. This particular car has been recently classified with a set of rules along
with 3 different turbo engine displacement options!
#32083 from Zachary Slater · No action required · Minutes (2022-04 Fastrack)
Thank you for your letter. Please see letter #32424 in current Fastrack for further details concerning your request.
#32044 from Alex McBain · No action required · Minutes (2022-03 Fastrack)
Thank you for your letter. Please see the response to your letter #31898 in current Fastrack.
#31898 from Alex McBain · Not recommended · Minutes (2022-03 Fastrack)
Thank you for your letter. This request is to far outside the realm of the GT philosophy.
#31452 from William Moore · Not recommended · Minutes (2022-01 Fastrack)
Thank you for your letter. The CRB does not feel that this requested weight reduction is justified. We will continue to collect
data.
#30879 from Nathan McBride · Not recommended · Minutes (2021-09 Fastrack)
Thank you for your letter. The CRB will continue to collect data and monitor the class.
#30675 from Jozsef Petkes · Not recommended · Minutes (2021-07 Fastrack)
Thank you for your letter. The Porsche GT4 Clubsport (982) is currently classified in GTX where the CRB feels it is properly
classified.
#30621 from Thomas DeWitt · No action required · Minutes (2021-07 Fastrack)
Thank you for your letter. Your request to classify the BMW E92 M3 is not necessary as it is already classified in GT2/ST.
#30579 from Marvin Epps · No action required · Minutes (2021-07 Fastrack)
Thank you for your letter, please see response to letter #30472 in current Fastrack.
#30593 from Nathan McBride · No action required · Minutes (2021-06 Fastrack)
Thank you for your letter. All GT2 and ST cars with the exception of various GT2 "spec" classifications can already have
an ECU of their choice!
#30279 from John Schertzer · No action required · Minutes (2021-04 Fastrack)
Thank you for your letter, GT2/ST only spec cars that are equipped from the factory with paddle shifters are allowed on cars with
a Spec Line added for that car.
#30199 from Joe Aquilante · Not recommended · Minutes (2021-03 Fastrack)
Thank you for your letter. The data collected supports this weight adjustment.
#30184 from William J. Moore · Not recommended · Minutes (2021-03 Fastrack)
Thank you for your letter. The CTB will continue to collect data and monitor the overall performance of the class.
#30141 from Andrew Aquilante · Not recommended · Minutes (2021-03 Fastrack)
Thank you for your letter. The data collected supports this weight adjustment.
#29840 from Andrew Aquilante · Not recommended · Minutes (2021-01 Fastrack)
Thank you for your letter. The rule is adequate as written "Mirrors shall provide driver visibility to the rear of both sides of the
car."
#26004 from Luis Rivera · Taken care of · Minutes (2021-01 Fastrack)
Thank you for your letter. Please refer to Technical Forms and Downloads on the SCCA website.
#29163 from Butch Kummer · No action required · Minutes (2020-10 Fastrack)
Thank you for your letter. Please see the response to letter #29219 in current Fastrack.
#29165 from Robert Finlayson · Not recommended · Minutes (2020-09 Fastrack)
Thank you for your letter. We will continue to monitor all cars in class, and data provided, to make any adjustments to this car.
#29051 from TIM KEZMAN · Not recommended · Minutes (2020-09 Fastrack)
Thank you for your letter, it is believed that the 991.1 cars are appropriate as classed, we will continue to monitor the
performance of these cars in class.
#29032 from Craig Anderson · Not recommended · Minutes (2020-09 Fastrack)
Thank you for your letter. Please see letter #29221 regarding the Intake Manifold. The CRB does not recommend Dive planes
(canards). A weight reduction is not recommended. We will continue to monitor the class.
#28878 from Mitch Marvosh · Not recommended · Minutes (2020-07 Fastrack)
Thank you for your letter. The CRB will continue to monitor the performance within GT2/ST
#28395 from Lou Gigliotti · No action required · Minutes (2020-04 Fastrack)
Thank you for your letter. The balance of performance between the various rule sets are competitive,
the CRB will continue to monitor performance and make adjustments as necessary.
#28362 from Paul Fairchild · Not recommended · Minutes (2020-04 Fastrack)
Thank you for your letter. This car is not a good fit for GT3.
#28361 from Tyler Kicera · No action required · Minutes (2020-04 Fastrack)
Thank you for your letter. The CRB will continue to monitor the performance of the class.
#28334 from Craig Anderson · No action required · Minutes (2020-04 Fastrack)
Thank you for your letter. The CRB will continue to monitor class performance.
#28257 from Lou Gigliotti · No action required · Minutes (2020-04 Fastrack)
Thank you for your letter. The balance of performance between the various rule sets are competitive,
the CRB will continue to monitor performance and make adjustments as necessary.
#28246 from Lou Gigliotti · Taken care of · Minutes (2020-04 Fastrack)
Thank you for your letter. The balance of performance between the various rule sets are competitive,
the GTAC will continue to monitor performance and make adjustments as necessary.
#28122 from Craig Anderson · Not recommended · Minutes (2020-04 Fastrack)
Thank you for your letter. Aero and power to weight rules are adequate as written.
#28181 from Samuel Fouse · Member feedback requested · Minutes (2020-03 Fastrack)
Thank you for your resume. We will keep your resume on file for future needs on the GTAC AdCom.
DATE: February 20, 2020
#28180 from Jon Anderson · No action required · Minutes (2020-03 Fastrack)
Thank you for your letter. Please see letter #27961 in February 2020 Fastrack.
#28127 from Alex Phelps · No action required · Minutes (2020-03 Fastrack)
Thank you for your letter. Please see letter #28119 in current Fastrack.
#28084 from Barry Boes · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The car is competitive as classed and the CRB will continue to monitor
performance at the Super Tour and Runoffs for all drivers/cars combinations in class.
#28069 from Brad McAllister · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The car is competitive as classed and the CRB will continue to monitor
performance at the Super Tour and Runoffs for all drivers/cars combinations in class.
#28042 from Phillip Reith · No action required · Minutes (2020-03 Fastrack)
Thank you for your letter. A rear spoiler has not been prohibited in GT2.
#28028 from Barry Boes · Not recommended · Minutes (2020-03 Fastrack)
Thank you for your letter. The car is competitive as classed and the CRB will continue to monitor
performance at the Super Tour and Runoffs for all drivers/cars combinations in class.
#27652 from Danny Lowry · No action required · Minutes (2020-01 Fastrack)
Thank you for your letter. Paddle shifter is already allowed with a 100 lb. weight penalty.
#27323 from Todd Oppermann · Recommended to the Board · Minutes (2020-01 Fastrack)
In GCR section 9.1.2.F.6.c.1, add as follows:
Alternatively, the bottom may be captured in a channel.
"No clips or straps are required if bonded-glass factory windshields and/or rear windows are attached to
chassis per original specifications (i.e., glass-bonding adhesive).”
#27373 from Gordon Kinney · Recommended to the Board · Minutes (2019-12 Fastrack)
In GT2 GCR section 9.1.2.F.3, add new section as follows:
"7. Automatic Transmissions (10 forward speeds max.) are allowed in GT2 with a 100# weight penalty."
#27215 from Tyler Kicera · No action required · Minutes (2019-09 Fastrack)
Thank you for your letter, the Club Racing Board will continue to collect data in GT2 class and make
adjustments as necessary.
#27149 from Brad Gross · No action required · Minutes (2019-09 Fastrack)
Thank you for your letter, the Club Racing Board will continue to collect date from the class and monitor
performance and make adjustments as required.
#26279 from John Mueller · No action required · Minutes (2019-09 Fastrack)
Thank you for your letter. Competitor may request classification in GTX after supplying updated Lotus
Exige S info.
#27086 from Barry Boes · No action required · Minutes (2019-08 Fastrack)
Thank you for your letter. The Club Racing Board will continue to collect data in GT2 class and make
adjustments as necessary.
#27085 from Scott Rettich · No action required · Minutes (2019-08 Fastrack)
Thank you for your letter. The Club Racing Board will continue to collect data in GT2 class and make
adjustments as necessary.
#27081 from Joseph Wolf · No action required · Minutes (2019-08 Fastrack)
Thank you for your letter. The Club Racing Board will continue to collect data in GT2 class and make
adjustments as necessary.
#27064 from D. Jeff Wood · No action required · Minutes (2019-08 Fastrack)
Thank you for your letter. The Club Racing Board will continue to collect data in GT2 class and make
adjustments as necessary.
#27060 from Barry BOES · No action required · Minutes (2019-08 Fastrack)
Thank you for your letter. The Club Racing Board will continue to collect data in GT2 class and make
adjustments as necessary.
#27058 from Joe Harlan · Not recommended · Minutes (2019-08 Fastrack)
Thank you for your letter. Allowing alternate fuel sources is beyond the GTAC's ability.
#27035 from Lou Gigliotti · Not recommended · Minutes (2019-08 Fastrack)
Thank you for your letter. If you would like to run the requested carbon parts you must run GTX.
#26981 from Jeff Burck · Not recommended · Minutes (2019-08 Fastrack)
Thank you for your letter. The Club Racing Board is not recommending any new Stock Car bodies for
GT2/ST.
#26923 from Lou Gigliotti · Not recommended · Minutes (2019-08 Fastrack)
Thank you for your letter. If you would like to run the requested carbon parts you must run GTX.
#26713 from Kristofer Olson · Taken care of · Minutes (2019-06 Fastrack)
Thank you for your letter. Please reference letter #26121.
#26614 from Lou Gigliotti · No action required · Minutes (2019-06 Fastrack)
Thank you for your letter. Please refer to letter #26509. Weight has been increased to 2930.
#26612 from Lou Gigliotti · No action required · Minutes (2019-06 Fastrack)
Thank you for your letter. Please refer to letter #26509. Weight has been increased to 2930.
#26609 from Lou Gigliotti · No action required · Minutes (2019-06 Fastrack)
Thank you for your letter. Please refer to letter #26509. Weight has been increased to 2930.
#26582 from Lou Gigliotti · No action required · Minutes (2019-06 Fastrack)
Thank you for your letter. Please refer to letter #26509. Weight has been increased to 2930.
#26428 from Shad Huntley · Taken care of · Minutes (2019-06 Fastrack)
Thank you for your letter. Please reference letter #26121.
#28654 from Craig Anderson · Not recommended · Minutes (2019-05 Fastrack)
Thank you for your letter. The CRB sees the competition in GT2 as being level and will continue to
monitor the performance of the class.
#28500 from Lou Gigliotti · No action required · Minutes (2019-05 Fastrack)
Thank you for your letter. The balance of performance between the various rule sets are competitive,
the CRB will continue to monitor performance and make adjustments as necessary.
#28423 from Lou Gigliotti · No action required · Minutes (2019-05 Fastrack)
Thank you for your letter. The balance of performance between the various rule sets are competitive,
the CRB will continue to monitor performance and make adjustments as necessary.
#28048 from Tim Horrell · No action required · Minutes (2019-05 Fastrack)
Thank you for your letter. This car is already classified in GT2-ST.
#26507 from Oscar Jackson · Not recommended · Minutes (2019-05 Fastrack)
Thank you for your letter. This car is over the potential abilities for GT2 and should be
classified in GTX.
#26605 from Thomas Dewitt · No action required · Minutes (2019-04 Fastrack)
Thank you for your letter. Please see response to letter #26159 in Tech Bulletin.
#26377 from David Tuaty · No action required · Minutes (2019-04 Fastrack)
Thank you for your letter. The Club Racing Board feels the 991.1 is properly classified at
current weight.
#26286 from John Schertzer · Member advisory · Minutes (2019-04 Fastrack)
Thank you for your letter. You may fabricate a splitter to the exact measurements as the Howe
item but not in Carbon Fiber.
#26134 from marvin epps · Not recommended · Minutes (2019-03 Fastrack)
Thank you for your letter. Wheel fans are allowed for purpose built GT2 cars, but not for GT2/
ST cars.
#26065 from Bob Monette · Not recommended · Minutes (2019-03 Fastrack)
Thank you for your letter. The car is competitive as classed. Club Racing Board will continue
to monitor performance.
#25185 from Amir Haleem · Member feedback requested · Minutes (2019-03 Fastrack)
The CRB is requesting feedback for introducing small displacement engines with properly
sizes TIRs as an entry point into GT2.
#25333 from marvin epps · Taken care of · Minutes (2019-02 Fastrack)
Thank you for your letter. This is taken care of in letter #26029. See January Fastrack.
#26029 from Club Racing Board · Recommended to the Board · Minutes (2019-01 Fastrack)
Effective 1/1/2019, change as noted below:
APPENDIX K. 2012 STO GENERAL TECHNICAL REGULATIONS
C. Bodywork
10. Fenders and wheel openings shall remain unmodified. OEM base model fenders may
be flared to allow for tire clearance up to 2”. They must maintain the OEM profile and
appearance, seamlessly around the wheel arch. It is permitted to roll under or flatten any
interior lip on the wheel opening for tire clearance. Cars with plastic/composite fenders may
remove any interior wheel opening lip, but the resulting material edge shall be no thinner than
the basic fender material thickness. Non-metallic inner fender liners may be removed
#25958 from Matt Jensen · Not recommended · Minutes (2019-01 Fastrack)
Thank you for your letter. The CRB does not plan to classify this car in GT3. It is currently
classified in GTX.
#25957 from Matt Jensen · Taken care of · Minutes (2019-01 Fastrack)
Thank you for your request. This car is being classified in GTX in letter #26034, Technical
Bulletin.
#25956 from Matt Jensen · Not recommended · Minutes (2019-01 Fastrack)
Thank you for your letter. The car is competitive as classified.
#25667 from Craig Anderson · Not recommended · Minutes (2019-01 Fastrack)
Thank you for your request. GT2/ST is a class that allows engines to be raced in a chassis
that they may not have been available in from OEM.
#24785 from Mike McAleenan · Not recommended · Minutes (2019-01 Fastrack)
Thank you for your input. The CRB does not recommend this change.
#24784 from Mike McAleenan · Not recommended · Minutes (2019-01 Fastrack)
s65
Thank you for your letter. The CRB does not recommend this change as it is competitive as
classed.
#23944 from Scotty B White · Taken care of · Minutes (2019-01 Fastrack)
Thank you for your request. Please see the response to letter #21466, Technical Bulletin.