GTX McLaren 720s GT3
#31955 from Demetrio Bilbatua · Rule change · TB 22-03 (2022-03 Fastrack)
In GTX - FIA GT3, classify McLaren as follows:
GTX – FIA GT3
Make Homologation Model
Restrictor
(mm)
Weight (lbs) Notes
McLaren GT3-N/A GT3 720s 3000 lbs.
BoP Lab / Buttonwillow Raceway Park
This track has been raced on 2 configurations (The Circuit, 2.57 mi; 19, 2.92 mi). Laps on different configurations are not comparable, so only events on the 2.57 mile layout are shown; switch above to see the others.
FE has no laps in the events chosen. It ran at Super Tour Apr 2019, Super Tour Apr 2018, Super Tour Apr 2017: add those events.
SRF has no laps in the events chosen. It ran at Super Tour Apr 2017, Majors Apr 2016: add those events.
| Pos | Car | Driver | Class | # | Lap | Theoretical | Qual | Race | 5-lap stint | Consistency | Trap | S1 | S2 | S3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Chevrolet | Bob Blizzard | GTX | 9 | 1:49.569 B-P | 1:49.051 | 124.2 B-P | 29.869 B-P | 31.704 B-P | 47.478 B-P | ||||
| 2 | Ford Mustang GT4 | Rob Scholl | GTX | 22 | 1:49.596 B-R2 | 1:48.800 | 1:49.596 B-R2 | 1:50.003 B-R2 | +0.917 B-R2 | 116.4 B-R2 | 30.070 B-R2 | 31.820 B-R1 | 46.910 B-R2 | |
| 3 | Porsche 981 Cayman | Moze Cowper | GTX | 111 | 1:54.892 A-Q1 | 1:54.066 | 1:54.892 A-Q1 | 1:55.330 A-R2 | 1:55.654 A-R2 | +0.622 A-R2 | 146.0 A-R1 | 31.377 A-R1 | 32.983 A-R2 | 49.706 A-Q1 |
| 4 | Chevrolet Camero | Michael Arnheiter | GTX | 63 | 1:59.339 B-P | 1:56.800 | 124.8 B-P | 32.354 B-P | 33.705 B-P | 50.741 B-P |
One row per driver and car (a driver who changed cars has a row for each). Each cell is that driver's best in that car across the selected events, with the session it was set in. Best 5-lap stint is the mean of the driver's quickest five consecutive race laps, and consistency is how far their median race lap sat behind their best in that race (small is a driver who does it every lap); both come from the race with the best stint. The fastest in each column is purple, and a car whose best lap is more than 115% of the fastest in its class is greyed (marked ">115%" beside the driver) and left out of the colour scale. Click a column to sort, a row to highlight it. Theoretical lap is the sum of the best sectors, whichever laps they came from, and never slower than the best lap (where a car's fastest laps were recorded without sector times, its best lap is used). The 115% mark is about the car's best lap only: a car whose best lap is within 115% of the fastest in its class is never marked. Greyed sectors with no theoretical lap mean the sector times on file do not add up to a believable lap. Letters refer to the events above; Q is qualifying, R a race.
Sectors
- S1 SF → IM1 0.65 mi
- S2 IM1 → IM2 0.75 mi
- S3 IM2 → SF 1.17 mi
- Spd In → Out 0.03 mi
Sectors are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.
By car
| Car | Class | Drivers | Lap | Qual | Race | Trap | S1 | S2 | S3 |
|---|---|---|---|---|---|---|---|---|---|
| Chevrolet | GTX | 1 | 1:49.569Bob Blizzard | 124.2Bob Blizzard | 29.869Bob Blizzard | 31.704Bob Blizzard | 47.478Bob Blizzard | ||
| Ford Mustang GT4 | GTX | 1 | 1:49.596Rob Scholl | 1:49.596Rob Scholl | 116.4Rob Scholl | 30.070Rob Scholl | 31.820Rob Scholl | 46.910Rob Scholl | |
| Porsche 981 Cayman | GTX | 1 | 1:54.892Moze Cowper | 1:54.892Moze Cowper | 1:55.330Moze Cowper | 146.0Moze Cowper | 31.377Moze Cowper | 32.983Moze Cowper | 49.706Moze Cowper |
| Chevrolet Camero | GTX | 1 | 1:59.339Michael Arnheiter | 124.8Michael Arnheiter | 32.354Michael Arnheiter | 33.705Michael Arnheiter | 50.741Michael Arnheiter |
The best any driver of each car managed across the selected events, with who set it. Spellings and model years of the same car are grouped; click a row marked ▸ to see each version. Grouping is worked out from the names, so tell us if two cars are wrongly merged or split.
Rule changes between these events
Cal Club 2022 → Cal Club 2024 2022-02-17 to 2024-02-23
GTX Add Classification to the accepted Model Table
#31981 from Henry Hill · Rule change · TB 22-05 (2022-04 Fastrack)
In GTX Table 4, add a spec line as follows:
Table 4
Marque Model Engine Restrictor Min Weight (lbs) Notes
Wolf GB08 F1 Ford 52XS V8 NA 1725
Must comply with specifications found here:
https://www.scca.com/pages/
technical-forms-and-downloads
GTX Request to classify C7 Corvette Grand Sport IN GTX Misc
#32254 from Joe Aquilante · Rule change · TB 22-05 (2022-04 Fastrack)
In GTX Spec Lines, classify C7 Corvette Grand Sport as follows:
GTX - MISC
Make Homologation Model
Restrictor
(mm)
Weight
(lbs) Notes
C7 Corvette Grand Sport NA 3200 May remove “displacement on demand” valve train system
GTX E&O list of eligible prototypes
#32511 from Club Racing Board · Rule change · TB 22-05 (2022-04 Fastrack)
In GTX, GCR section 9.1.2.H.B, change as follows:
"10. IMSA GTP (1994-1998 1981-1993)
11. - IMSA Camel Lights (1985-1993)
12. - Le Mans Prototype 1 (1999-2013)
13. - Le Mans Prototype 2 (1999-Present)
14. - Le Mans Prototype 3 (2017-Present)
15. - Le Mans Prototype Challenge (2009-2018)
16. - World Sports Car (1994-1998)
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11. 17. Vehicles listed in Table 4 below."
FE Update FE/FE2 Tire Rule
#32613 from Robey Clark · Rule change · TB 22-06 (2022-06 Fastrack)
wordingFE tires must be run as delivered in sets of 4.As printed in Fastrack
In FE, GCR section 9.1.1.I.2.M, change as follows:
"Tires must be run as delivered in sets of 4 as stated below:"
SRF SRF Tire Rule Update
#32614 from Robey Clark · Rule change · TB 22-06 (2022-06 Fastrack)
In SRF, GCR section 9.1.8.D.1.X.f, change as follows:
"Tires: must be run as delivered."
GTX Classify 992 GT3 Cup
#32649 from SCCA Staff · Rule change · TB 22-06 (2022-06 Fastrack)
In GTX, classify the Porsche 992 GT3 Cup Car as follows:
GTX – MISC.
Make Model Engine
Restrictor
(mm)
FE Master cylinder clarification
#32669 from Club Racing Board · Rule change · TB 22-06 (2022-06 Fastrack)
wordingFE master cylinders clarified: Girling front .700" piston WM802005, rear .750" piston WM802006.As printed in Fastrack
In FE, GCR section 9.1.1.I.2.K.c, change as follows:
"Master cylinders must be the Girling type:
Girling F front master cylinder is .700" piston diameter, Part # WM802005
Girling R rear master cylinder is .750" piston diameter, Part # WM802006"
SRF Brake, seal, and air filter clarifications
#32670 from Club Racing Board · Rule change · TB 22-06 (2022-06 Fastrack)
In SRF, GCR section 9.1.8.D.1.X.g, change as follows:
"Brakes: Hawk Blue 9012 pads P/N 801993 must be used. Wilwood vented rotor P/N 800065 shall be used as delivered with no
machining of any kind. Minimum thickness 13.25 12.20mm (0.522 0.481"). The 1985 Renault Alliance solid front rotor (Reference:
Bendix PRT1318 or Centrix 121.11004) may be used on front, rear, or both axles, but each axle must be paired to the same type
rotor. Rubber caliper bushings may be replaced with bronze bushings P/N 1196185 or P/N 1196185."
In SRF, GCR section 9.1.8.D.2.H, change as follows:
"No performance M modifications of any kind.
SCCA Enterprises’ seals shall be intact.
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(2) on cam cover, (2) on the oil pan, (1) on the each cam shaft. Automatic Drivetrain Violation if removed."
In SRF, GCR section 9.1.8.D.2.H.23, change as follows:
"Air Filter: P/N WM301020 or K&N RC-9160"
GTX Tail lights on all GT category race cars.
#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
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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."
FE Engine Heat Shield & Insulation
#33019 from Robey Clark · Rule change · TB 22-09 (2022-09 Fastrack)
addedFE engine heat shield and insulation between block and exhaust now permitted to protect fuel cell, filter, rail, lines.As printed in Fastrack
In FE, GCR section 9.1.1.I.2.G.a.17, change as follows:
"A heat shield and heat insulation material may be used between the engine block and the exhaust system and is recommended
for the purpose of protecting hoses, shifter cable, and wiring from the heat of the engine and exhaust. Heat insulation material
may also be used to protect the fuel cell, fuel filter, fuel rail, and fuel lines."
FE Brake bias adjuster clarification
#33084 from Robey Clark · Rule change · TB 22-10 (2022-10 Fastrack)
added · suspension & brakesFE drivers may now adjust brake bias manually during the race.As printed in Fastrack
In FE, GCR section 9.1.1.I.2.K, add the following:
"f. Driver adjustable manual brake bias is allowed."
FE FE Front and Rear Wing Update & Clarification
#33089 from Robey Clark · Rule change · TB 22-10 (2022-10 Fastrack)
wordingFE front and rear wing specifications clarified: adjustment ranges, shimming, Gurney flap sizes, mounting hardware, and measurement references refined.As printed in Fastrack
In FE, GCR section 9.1.1.I.2.F.g, change as follows:
"The front wing main plane, front wing secondary elements, front wing support mounts, and front wing endplates assembly and
its related mounting components must be used and mounted as delivered from Enterprises. Any m Modifications to these parts,
except as specifically noted herein, is strictly forbidden are prohibited. The front main wing plane angle is zeroed on the rearupper aft transmission surface measured with a suitable angle gauge, i.e.: digital level on the top main plane 2 inches outwardfrom the nose box mounts element may be adjusted +2.5 to -0.5 degrees. It must meet a minimum measurement of negative .5degrees (angled down in the back) and a maximum measurement of positive 2.5 degrees (angled up in the back). It is acceptableto shim the main plane to obtain this measurement. Shimming 2 of the 4 verticals through the main element mounting points to
achieve adjustment range is allowed. The main element angle is measured relative to the reference plane. The main element is
checked on the upper surface, midway between the vertical mounting and outer secondary elements on both sides. Note: The
reference plane is the machined surface where the shock clevises are attached to the transmission case. Secondary wing
elements may be used in any of the provided adjustment holes. Gurney flaps (0.500" +/- 0.030") are permitted allowed as an
option for installation on the trailing edge upper surface of the front wing on secondary elements only, not the wing mainplane. They Gurney flaps must be securely attached in a secure fashion, without modification to the wing element except formounting hardware. Only .500” +/- .030” flaps are allowed. Maximum number of mounting locations on front flaps is 2 on eachflap and maximum hardware size is with two #8 (.156) hardware or tape. Gurney flaps, where attached, shall be are bent or
formed 90 degrees to have a sharp inner radiusand parallel to the upper surface of the wing element and. no t Tapered or "saw-
toothed" Gurneys flaps are not permitted. Gurney flaps are measured for total height as mounted from the upper surface of the
element."
In FE, GCR section 9.1.1.I.2.F.h, change as follows:
"The rear wing assembly and its related mounting components are to must be used and mounted as delivered. Anym Modifications, except as specifically notedherei n, are strictly prohibited. The lower plane angle, zeroed on the rear upper afttransmission surface, measured with a suitable angle gauge. i.e.; digital level on the top surface of the lower rear wing mustmeet a minimum of –3.0 degrees (angled down in the back) and a maximum of +2.0 degrees (angled up in the back). It isacceptable to adjust the lower rear element to meet these requirements element may be adjusted +2.0 to -3.0
degrees. Chamfering the upper inner corners of the wing mounting brackets to achieve the adjustment range is allowed. The
element angle is measured relative to the reference plane. The element is checked on the top surface, near the center, without a
Gurney flap. Note: The reference plane is the machined surface where the shock clevises are attached to the transmission
case. The upper rear wing element may only be adjusted within the parameter profile of the wing endplates and wing adjustersas provided from Enterprises using any of the provided adjustment holes. No additional holes may be added. Gurney
flaps (0.250" +/- 0.030") are permitted allowed as an optionfor installation on the trailing edge upper surface of the on one or
both wing elements. They Gurney flaps must be securely attached in a secure fashion, without modification to the wing elementexcept for mounting hardware. Only .250” +/- .030” flaps are allowed on one or both elements with five #8 hardware or
tape.The Gurney flaps only, may extend beyond the parameters of the end plate are bent or formed 90 degrees to have a sharp
inner radius. Maximum number of mounting locations is 5 and maximum hardware size is #8 (.156). Gurney flaps, where degreesand parallel to the upper surface of the wing element and no t Tapered or "saw-toothed"
Gurneys flaps are not permitted. Gurney flaps are measured for total height as mounted from the upper surface of the element."
GTX GT2 (TA2)/GTA Part Number Update
#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."
SRF Update SRF Brake Rule
#33469 from Robey Clark · Rule change · TB 23-01 (2023-01 Fastrack)
In SRF, GCR section 9.1.8.D.X.g, change as follows:
"Brakes: Hawk Blue 9012 pads P/N 801993 must be used. Wilwood vented rotor P/N 800065 shall be used as delivered with no
machining of any kind. Minimum thickness 12.20mm (0.481"). The 1985 Renault Alliance solid front rotor (Reference: BendixPRT1318 or Centrix 121.11004) may be used on front, rear, or both axles, but each axle must be paired to the same typerotor. The Renault Alliance solid front rotors may not be used. Rubber caliper bushings may be replaced with bronze bushings P/N
1196185 or P/N 1196185. Original caliper pistons may be replaced with vented caliper piston P/N 1196184; no other
modification allowed. Wilwood caliper with bracket universal fit P/N 800038 may be used as delivered with no modification of
any kind. Wilwood knock back spring (2.63 lbs.) P/N 800045 may be used as delivered with no modification of any kind;
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maximum of one spring per caliper."
P2 Engine Table
Spec
Line Engine Series
A specification table follows in the original; it is not shown here.
FE Update FE SADEV Transmission Rule
#33883 from Robey Clark · Rule change · TB 23-04 (2023-04 Fastrack)
wordingFE SADEV transmission rule removes note that all ratios under review and could be updated prior to sealing.As printed in Fastrack
In FE, GCR section 9.1.1.I.2.G.b.4.b, change as follows:
"(All SADEV ratios are under review and could be updated prior to sealing date)"
GTX Please classify Fields Cardinal V8
#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
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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.
SRF Update SRF Front W2 Rain Tire Part Number
#34118 from Robey Clark · Rule change · TB 23-05 (2023-05 Fastrack)
In SRF, GCR section 9.1.8.D.1.X.f, change as follows:
"Front – Hoosier P/N 46100 1 P185/65R13 W2"
SRF Hoosier SRF Wet Front Tire Rule Update
#34189 from Robey Clark · Rule change · TB 23-06 (2023-06 Fastrack)
In SRF, GCR section 9.1.8.D.1.X.f, change as follows:
"Wet:
Front – Hoosier P/N 46100 P185/60R13 H20 or W2
Rear – Hoosier P/N 46105 P205/60R13 H20 or W2
Ground clearance is 2.5" with driver as raced when P185/60R13 (H20 or W2) tires are used."
GTX Request Ligier LMP3 Classification
#34043 from Alex Kirby · Rule change · TB 23-06 (2023-07 Fastrack)
In GTX Spec Lines, classify Ligier LMP3 as follows:
GTX - MISC
Make Model Engine Restrictor
(mm) Weight (lbs) Notes
Ligier LMP3 3.7L NA 2203
GTX Ligier JSP4 Request
#34173 from Bob Monette · Rule change · TB 23-06 (2023-07 Fastrack)
In GTX Spec Lines, classify Ligier JSP4 as follows:
GTX - MISC
Make Model Engine Restrictor
(mm) Weight (lbs) Notes
SRF SRF Radiator Rule Update
#34805 from Robey Clark · Rule change · TB 23-10 (2023-10 Fastrack)
In SRF, GCR section 9.1.8.D.1.V.j, change as follows:
"Radiator - Enterprises new style P/N 480465 (requires baffle P/N 480464) or P/N 480466 can be used. P/N 480466, may can be
replaced with Automotive P/N 1R698, CU698 or equivalent OEM manufacturer justified by one cross-reference chart equivalent,
as long as the size, shape, and material are the same as the original P/N. The capacity, core thickness, etc., cannot be changedeven if allowed under the above. The competitor is responsible for providing this documentation of the cross-reference P/N."
GTX Errors in GTCS Headings and Use of the Terms Category and ClassChange existing GTL and GTA Rules
#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
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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.
SRF Update SRF Rain / Brake Rule
#34706 from Robey Clark · Rule change · TB 23-09 (2023-09 Fastrack)
In SRF, GCR section 9.1.8.D.1.W.l, change as follows:
"A Super Bright LEDs Inc. rain / brake light comprised of a single standard trailer oval lamp, 2-1/4 inches x 6-1/2 inches, withincandescent or LED illumination, P/N PT-STRB-R24, is required in the original roll hoop mounting location. This rule supersedes
GCR section 9.3.32.B.2 effective 1/1/2024 through 12/31/2024. No changes may be made to the original 3-pin connector on the
wiring harness. The secondary filament of the brake light assembly shall must be connected to a switch enabling its use as a rain
light."
FE Update FE Rain Light Rule
#34707 from Robey Clark · Rule change · TB 23-09 (2023-09 Fastrack)
wordingFE rain light now must meet FIA Standard 8874-2019, Technical List No. 76, effective 1/1/2024.As printed in Fastrack
In FE, GCR section 9.1.1.I.2.N.f, change as follows:
"Any rain light is allowed. Effective 1/1/2024, a rain light that meets FIA Standard 8874-2019, Technical List No. 76, is required as
specified in GCR section 9.3.32.B.2."
SRF Update SRF Brake Light Rule v1
#34853 from Robey Clark · Rule change · TB 23-10 (2023-10 Fastrack)
In SRF, GCR section 9.1.8.D.1.W.l, change as follows:
"A Super Bright LEDs Inc. P/N PT-STRB-R24 (SCCA Enterprises P/N 180427A) rain / brake light, P/N PT-STRB-R24, is required in the
original roll hoop mounting location. This rule supersedes GCR section 9.3.32.B.2 effective 1/1/2024 through 12/31/2024. No
changes may be made to the original 3-pin connector on the wiring harness. An SCCA Enterprises P/N 1190503 Strobing Brake
Light Pigtail is required. The secondary filament of the brake light assembly must be connected to a switch enabling its use as
a strobing rain light. A Strobing Brake Light Kit P/N 1168003 is available, which includes the brake light and pigtail."
GTX KTM X Bow GTX
#34956 from Demetrio Bilbatua · Rule change · TB 24-01 (2024-01 Fastrack)
In GTX Spec Lines, classify KTM as follows:
GTX – KTM
Make Homologation Model Restrictor
(mm) Weight (lbs) Notes
SRF SRF / SRF3 Rule Updates
#35268 from Robey Clark · Rule change · TB 24-01 (2024-01 Fastrack)
In SRF, GCR section 9.1.8.D.1.H, add the following:
"NO MODIFICATIONS ALLOWED. Front brake ducts are required, attached to the openings in the lower radiator baffles, any
flexible 4" duct material allowed, installed length minimum 12" maximum 36" in length. Must be securely fastened, Bracket Part# P/N 800368 can be used. Shall Must serve no other purpose. An extension may be welded to the side of the throttle pedal to
improve heel-and-toe braking. Master cylinder casting / location must be used as delivered on P/N 180110 Pedal Mounting
support. Aeroquip style -3 braided stainless flex lines only, must attach to all brake components without modification. Brake pad
"anti-rattle" clips must be removed."
In SRF, GCR section 9.1.8.D.1.V, add the following:
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"ii. Rear SADEV shift cable aluminum two-piece style clamp may be used. The P/N WM302007A clamp must serve no other
purpose."
In SRF, GCR section 9.1.8.D.1.X.k, add the following:
"Negative camber shall must not exceed 5.0 degrees absolute maximum front and rear."
In SRF, GCR section 9.1.8.D.1.AA.b, add the following:
"2. Height of the radiator opening vertical surface 3 1/2“ +/- 1/2"."
P2 Engine Table B.1
2008 and older Stock
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
2008 and older 37mm
P2 Engine Table B.2 Not required
P2 Engine Table B.3 39mm
Stock Engine
1050 lbs.
FE FE/FE2 rule update
#35269 from Robey Clark · Rule change · TB 24-01 (2024-01 Fastrack)
wordingFE allows racer's tape for crash repair, panel security, and heat exchanger opening control; seam taping banned.As printed in Fastrack
In FE, GCR section 9.1.1.I.2.P.c, add the following:
"Racer's tape may be used to repair crash damage, or as a precautionary means of securing the body panels or
retaining latches fasteners only. Crash-damage is defined as having occurred during the current event, and the tape should be of
an appropriate color if possible. Taping of body seams is not allowed. Taping across heat exchanger openings as a way to control
temperature is allowed and may serve no other purpose."
GTX Rear Blade Spoiler Clarification
#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.”
GTX GT Direct Injection allowance and rules
#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.”
GTX GT2/3 remove Direction Injection not allowed in Spec line notes
#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.”
Cal Club 2024 → Cal Club 2025 2024-02-23 to 2025-02-22
GTX Request for Spec Line 1010 Reconsideration
#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"
FE Hoosier Tire Decal Placement
#36435 from Robey Clark · Rule change · TB 24-08 (2024-08 Fastrack)
addedFE requires five Hoosier decals: one small on nose or front shock cover, one 12" on each front wing plate, one 12" on each lower floor panel before rear wheels.As printed in Fastrack
In FE, GCR section 9.1.8.I.2.M, add the following:
"b. Hoosier FE/FE2 Decal Placement:
Five (5) "Hoosier" decals are required in the following locations: One (1) small "Hoosier" decal on the nose or the front shock
cover of the car. One (1) 12" "Hoosier" decal on the outside vertical plane of each front wing plate. One (1) 12" "Hoosier" decal
on the vertical plane of each of the lower floor panels just in front of the rear wheels. Hoosier decals are available, free of charge,
from all Hoosier tire distributors and SCCA Enterprises."
SRF Update Rain Tire Rule and Hoosier Decal Placement
#36436 from Robey Clark · Rule change · TB 24-08 (2024-08 Fastrack)
In SRF, GCR section 9.1.8.D.1.X.f, change as follows:
"Wet:Front – Hoosier P/N 46100 P185/60R13 H20 or W2Rear – Hoosier P/N 46105 P205/60R13 H20 or W2Ground clearance is 2.5” with driver as raced when P185/60R13 (H20 or W2) tires are used.OR
Front – Hoosier P/N 46101 P185/65R13 W2
Rear – Hoosier P/N 46105 P205/60R13 W2
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1. It is forbidden to regroove tires.
2. The use of tire warmers or cooling methods other than natural air convection or conduction is prohibited. The penalty for
violation will be the loss of qualifying times and/or the disqualification of race results.
3. Hoosier SRF/SRF3 Decal Placement:
Four (4) "Hoosier" decals are required in the following locations: Two (2) 11" X 3" decals on the vertical plane of the front nose to
the outside of the cooling opening on each side and two (2) 18" X 5" decals, one on each side of the engine cover or above the
rear wheel openings on the vertical plane. Hoosier decals are available, free of charge, from all Hoosier tire distributors including
SCCA Enterprises."
FE Protest Fee Clarification
#36540 from SCCA Staff · Rule change · TB 24-09 (2024-09 Fastrack)
wordingFE and SRF protest fee rules redirected to GCR section 8.3.1.D for fees and procedure.As printed in Fastrack
In FE, GCR section 9.1.1.I.2.U.b.3, change as follows:
"Protest Fee: Regional -$25.00, National -$50.00. See GCR section 8.3.1.D for fees and payment procedure."
In SRF, GCR section 9.1.8.D.1.U.b.3, change as follows:
"Protest Fee: Regional -$25.00, National -$50.00. See GCR section 8.3.1.D for fees and payment procedure. Item 1 will be done by
the CSR or other shop that is equipped for this type of work and will be paid directly."
SRF Protest Fee Clarification
#36540 from SCCA Staff · Rule change · TB 24-09 (2024-09 Fastrack)
wordingFE and SRF protest fee rules redirected to GCR section 8.3.1.D for fees and procedure.As printed in Fastrack
In FE, GCR section 9.1.1.I.2.U.b.3, change as follows:
"Protest Fee: Regional -$25.00, National -$50.00. See GCR section 8.3.1.D for fees and payment procedure."
In SRF, GCR section 9.1.8.D.1.U.b.3, change as follows:
"Protest Fee: Regional -$25.00, National -$50.00. See GCR section 8.3.1.D for fees and payment procedure. Item 1 will be done by
the CSR or other shop that is equipped for this type of work and will be paid directly."
SRF Update to Letter 36619 with new Hoosier Contingency Decal Info
#36624 from Robey Clark · Rule change · TB 24-09 (2024-09 Fastrack)
In SRF, GCR section 9.1.8.D.1.X.f.3, change as follows:
"Four (4) "Hoosier" decals are required in the following locations: Two (2) 11" X 3" decals on the vertical plane of the front noseto the outside of the cooling opening on each side and two (2) 18" X 5" decals, one on each side of the engine cover or above therear wheel openings on the vertical plane. Hoosier decals are available, free of charge, from all Hoosier tire distributors includingSCCA Enterprises Per Hoosier's contingency program, three (3) decals are required to qualify for contingency awards. One (1)
decal must be located on each side of the car and one (1) decal must be visible on the front."
FE Update on Letter 36620 with new Hoosier Contingency Decal Info
#36625 from Robey Clark · Rule change · TB 24-09 (2024-09 Fastrack)
wordingFE Hoosier contingency decal requirement reduced from five decals in specific locations to three decals on sides and front.As printed in Fastrack
In FE, GCR section 9.1.1.I.2.M.b, change as follows:
"Five (5) "Hoosier" decals are required in the following locations: One (1) small "Hoosier" decal on the nose or the front shockcover of the car. One (1) 12" "Hoosier" decal on the outside vertical plane of each front wing plate. One (1) 12" "Hoosier" decalon the vertical plane of each of the lower floor panels just in front of the rear wheels. Hoosier decals are available, free ofcharge, from all Hoosier tire distributors and SCCA Enterprises Per Hoosier's contingency program, three (3) decals are required to
qualify for contingency awards. One (1) decal must be located on each side of the car and one (1) decal must be visible on the
front."
SRF Update SRF3 Air Filter Rule
#36681 from Robey Clark · Rule change · TB 24-10 (2024-10 Fastrack)
In SRF, GCR section 9.1.8.D.2.H.23, change as follows:
"Air Filter: P/N WM301020 or K&N RC-9160"
SRF Update SRF Brake Rotor Thickness
#36687 from Robey Clark · Rule change · TB 24-10 (2024-10 Fastrack)
In SRF, GCR section 9.1.8.D.1.X.g, change as follows:
"Brakes: Hawk Blue 9012 pads P/N 801993 must be used. Wilwood vented rotor P/N 800065 shall must be used as delivered with
no machining of any kind. Minimum thickness 12.20mm (0.481”) 13.25mm (0.522”)."
SRF Hoosier Tire Decal Placement
#36739 from Robey Clark · Rule change · TB 24-10 (2024-10 Fastrack)
In SRF, GCR section 9.1.8.D.2.B, change as follows:
"Mandatory identification: "SRF3" near the side car numbers. "Hoosier" logo (4) on both sides front lower outer corners of thenose and each side of the tail. Three (3) "Hoosier" logos, one (1) on each side of the car and one (1) on the center front of the car."
FE Brake Line to A-Arm Covers
#37110 from Robey Clark · Rule change · TB 24-12 (2024-12 Fastrack)
addedFE must use SCCA Part # WM803010 Brake Line to Control Arm covers if used, as delivered, fastened with zip ties or tape only.As printed in Fastrack
In FE, GCR section 9.1.1.G.2.K, add the following:
"g. If used, SCCA Enterprises Part # WM803010 Brake Line to Control Arm covers must be used as delivered and must be securely
fastened with zip ties/tie straps or tape. Part # WM803010 is the only approved part and may serve no other purpose."
GTX Correct language regarding OEM Areo Devices
#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.
Cal Club 2025 → Cal Club 2026 2025-02-22 to 2026-02-21
SRF Driver Safety & Comfort
#37966 from Robey Clark · Rule change · TB 25-04 (2025-04 Fastrack)
In SRF, GCR section 9.1.8.D.1.D, add the following:
"f. Driver Safety and Comfort modifications to seat and controls for drivers with disabilities may be made only by approval. These
modifications must be reported to SCCA Enterprises and noted in the car logbook. The modifications are approved only for the
noted driver with disabilities. If the car is used by or sold to another driver, it must be returned to the previous standard
configuration."
SRF Update SADEV transmission specs
#37992 from Club Racing Board · Rule change · TB 25-04 (2025-04 Fastrack)
In SRF, GCR section 9.1.8.D.2.K, change as follows:
"OR
SADEV-SRF3 6-Speed Sequential (beginning from Oct. 4, 2021 onward):
1st 12-36 3.0000 : 1
2nd 15-31 2.0667 : 1
3rd 18-28 1.5556 : 1
4th 22-28 1.2727 : 1
5th 24-26 1.0833 : 1
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6th 25-23 0.9200 : 1
Final Drive Ratio: 15-48 3.20"
GTX Request to Classify Porsche GT2 RS Clubsport
#37972 from Paul Fairchild · Rule change · TB 25-05 (2025-05 Fastrack)
In GTX, Classify Porsche GT2 RS Clubsport, as follows:
GTX
Make Homologation Model Restrictor
(mm)
Weight
(lbs) Notes
Porsche GT2 RS Clubsport Must have factory specifications available at all race events
GTX Ligier P3 LS Swap
#38164 from Bart Wolf · Rule change · TB 25-06 (2025-06 Fastrack)
In GTX Spec Lines, GTX-MISC., Ligier, LMP3, 3.0L, Add to Notes the following:
"Allow any normally aspirated LS Chevrolet engine may be used."
FE FE & FE2 Rule Updates
#38901 from Robey Clark · Rule change · TB 25-09 (2025-09 Fastrack)
wordingFE2 minimum weight stays 1270 lbs; intake manifold part number changes to WM301061; ECU to G992012; mandatory spec parts expanded; bubble tail WM138014 now FE only; SADEV transmission no modifications allowed; brake rotor part numbers to W…As printed in Fastrack
Effective 9/1/25 in FE, GCR section 9.1.1.G.1.A, change as follows:
"DefinitionFE’s with the Mazda 2.0L MZR engine will be classed as “FE2” and will use the class designation FE2. The Mazda 2.0L MZR motorcan be used in all SCCA events. It shall run under all FE Preparation rules except as noted below:a. 2.0L MZR may be run with an Elite 5SPD or a Complete SADEV 6SPD transmission KitMust use the following:b. 2.0L only Intake Manifold Part # WM30106c. Throttle Body Part # WM591930-Jenveyd. PE ECU Kit Part # 1192012e. Nippon-Denso Alternator Part # WM902127f. Oil Filter Adaptor Part # WM301050 & Oil Filter Part # G301022g. PCV Valve Part # WM391502h. The car shall weigh 1270 lbs. minimum, including the driver.i. 16” MAZDA logo on each side of the engine cowling and the Mazda wing & name logo on the front center of the nose cone.These are mandatory decals.j. 2.0L MZR required Spark Plug Part# ND ITV 24
Formula Enterprises cars "FE" with Mazda 2.0L MZR engine are classed as "FE2." FE2 is the primary class in all SCCA events and
must run under all FE Preparation rules except as noted below:
Mandatory items
16” MAZDA logo, each side of the engine cowling, Mazda wing logo, front center of the nose cone.
Table 2 (Spec Line Cars)
Car Engine
Wheel
Width
(in)
± .060
Aero Transmission Weight Notes
A specification table follows in the original; it is not shown here.
FE FE & FE2 Bubble Tail
#38978 from Robey Clark · Rule change · TB 25-10 (2025-10 Fastrack)
addedFE and FE2 Enterprise bubble tail part WM138014 now allowed; FE2 must use this configuration only.As printed in Fastrack
In FE, GCR section 9.1.1.G.2.F.k, change as follows:
"Enterprises bubble tail P/N: WM138014 is allowed for FE and is the only configuration for FE2."
SRF Add HD Oil Cooler
#38979 from Robey Clark · Rule change · TB 25-10 (2025-10 Fastrack)
In SRF, GCR section 9.1.8.D.1.V.ff, change as follows:
"SRF3 Oil Cooler, P/N G480503 or HD Oil Cooler P/N G1148500 may be used as mounted per the GEN3 Assembly Manual. No fan
permitted for SRF. HD Oil Cooler kit P/N G1148500 may be used as mounted per the GEN3 Conversion Manual."
GTX Please Consider Adding a Spec Line to GTX Table 4 for the RCR T70
#39470 from Peter Jankovskis · Rule change · TB 26-01 (2026-01 Fastrack)
In GTX-Misc. Table 4, classify RCR70 Coupe:
GTX – MISC. TABLE 4
Make Homologation Model Restrictor
A specification table follows in the original; it is not shown here.
FE FE & FE2 Rule Updates
#39484 from Robey Clark · Rule change · TB 26-01 (2026-01 Fastrack)
wordingFE adds engine modification restrictions, testing requirements, and drivetrain violation penalties with competition suspension.As printed in Fastrack
In FE, GCR section 9.1.1.G.2.G.a.1, add the following:
"NO MODIFICATIONS ARE ALLOWED EXCEPT WHERE SPECIFICALLY AUTHORIZED WITHIN THESE RULES. This includes all fuel
injection and engine management components, including exhaust, cooling, electrical and lubrication systems. All systems are
subject to test procedures and must conform to OEM / SCCA Enterprises specifications as stated and supplied by Enterprises. All
fluids, except fuel, are unrestricted."
In FE, GCR section 9.1.1.G.2.T, add the following:
"If a competitor refuses to give their engine and/or unlabeled parts for testing per a request of the Class Compliance Chief (CCC)
or Chief Steward, the following penalties will automatically be imposed:"
In FE, GCR section 9.1.1.G.2.T.d, add the following:
"The car and drivetrain are suspended from competition until the unit(s) specified by the CCC or Chief Steward are replaced."
In FE, GCR section 9.1.1.G.2.T, add a new section as follows:
"g. Any drivetrain part found to be out of spec, during voluntary or involuntary inspection, will constitute a Drivetrain Violation.
Penalties may be assessed post event."
What the rules allowed changed as listed; this does not say what any particular car ran.