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BoP Lab / Michelin Raceway Road Atlanta

FP + GTL at Michelin Raceway Road Atlanta

Class · click a class to switch, + to compare alongside
Events
PosCarDriverClass#LapTheoreticalQualRace5-lap stintConsistencyTrapS1S2S3
1Honda CRXChris Bovis 2+ carsGTL781:36.868 C-R21:36.7781:38.327 C-Q21:36.868 C-R21:37.971 C-R2+3.547 C-R2114.0 C-R236.854 C-R235.052 C-R224.872 C-R2
2Honda CRXsiPeter ShadowenGTL721:37.372 C-R21:37.3311:39.153 C-Q11:37.372 C-R21:38.778 C-R2+2.803 C-R2118.0 C-R237.621 C-R234.880 C-R224.830 C-R2
3Acura IntegraKen KannardFP511:37.623 C-R2sector data unreliable1:37.924 C-Q21:37.623 C-R21:38.167 C-R2+1.332 C-R2123.6 A-R137.5850.79224.740
4Mazda MiataMason WorkmanFP521:38.226 B-Q21:37.9741:38.226 B-Q21:38.568 D-R11:39.090 C-R2+2.802 C-R2122.6 D-R137.238 C-Q235.576 D-Q225.160 D-Q2
5Honda CRXChris Bovis 2+ carsFP1781:38.576 B-Q11:38.0611:38.576 B-Q11:38.655 B-R21:40.253 B-R1+1.209 B-R1117.3 B-R237.788 B-Q235.332 B-R224.941 B-Q1
6Mazda RX-7Michael LewisGTL1321:38.769 C-R21:38.4351:39.220 C-Q21:38.769 C-R21:39.885 C-R2+2.370 C-R2112.5 C-R237.219 C-R235.828 C-R225.388 C-R2
7BMW 325esMatt ReppertFP881:38.885 D-Q21:38.6561:38.885 D-Q21:38.946 D-R11:39.189 D-R1+0.711 D-R1122.1 D-R137.730 D-R135.717 D-R125.209 D-Q2
8Mazda MiataStephen SimondsFP631:39.332 B-R1sector data unreliable1:40.686 B-Q21:39.332 B-R11:40.971 B-R2+1.297 B-R2113.4 B-R237.7820.77825.477
9Honda Civic Del Sol VTECCliff IraFP361:39.386 A-R11:38.6471:39.502 A-Q11:39.386 A-R11:39.725 A-R1+0.718 A-R1124.2 A-R137.937 A-R135.234 A-Q125.476 A-Q1
10Mazda MiataPerry SimondsFP1641:39.671 D-R11:39.4151:41.729 D-Q11:39.671 D-R11:40.216 D-R1+1.866 D-R1121.1 D-R138.194 D-R135.909 D-R125.312 D-R1
11Mazda MIataSteven PowersFP1451:40.329 A-Q21:40.2261:40.329 A-Q21:41.177 A-R11:41.630 A-R1+1.468 A-R1118.4 A-Q238.142 A-Q236.400 A-Q225.684 A-Q2
12Mazda MiataPeter Tonelli IIFP911:41.072 C-R21:40.8961:41.593 C-Q21:41.072 C-R21:42.201 C-R2+2.934 C-R2106.7 C-R238.226 C-Q236.798 C-R225.872 C-R2
13Toyota TercellGraham FullerGTL221:41.074 C-R21:41.0571:44.073 C-Q21:41.074 C-R21:41.811 C-R2+1.804 C-R2112.9 C-R238.847 C-R236.124 C-R226.086 C-R2
14Mazda MiataRobert GarrisonFP061:41.644 A-Q11:41.5631:41.644 A-Q11:42.165 A-R11:49.665 A-R2+5.548 A-R2119.0 A-R238.892 A-Q136.536 A-Q126.135 A-Q1
15Mazda MiataMark WeberFP251:41.676 B-R11:41.4091:41.786 B-Q21:41.676 B-R11:42.904 B-R2+2.047 B-R2122.4 D-Q239.042 B-Q236.212 B-R126.155 B-Q2
16Acura IntegraLes ChaneyFP331:43.861 D-R11:43.7161:46.823 D-Q21:43.861 D-R11:44.600 D-R1+2.050 D-R1121.7 D-Q2, D-R140.568 D-R136.332 D-R126.816 D-R1
17Mazda MiataDavid BlainGTL371:46.981 C-Q11:46.4881:46.981 C-Q11:47.381 C-R21:48.182 C-R2+1.304 C-R2104.0 D-R140.583 C-Q238.636 C-R227.269 C-Q1
18Mazda MiataGregg SeigartFP481:50.884 D-Q21:50.6521:50.884 D-Q21:52.000 D-R11:52.957 D-R1+4.463 D-R1109.4 D-Q243.023 D-Q239.471 D-Q228.158 D-Q2
19Fiat 124 SpiderDouglas Sanders >115%FP102:08.730 C-R22:07.9792:08.730 C-R22:12.245 C-R2+3.936 C-R291.2 C-R250.604 C-R242.988 C-R234.387 C-R2

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

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

CarClassDriversLapQualRaceTrapS1S2S3
Honda CRXFP/GTL21:36.868Chris Bovis1:38.327Chris Bovis1:36.868Chris Bovis118.0Peter Shadowen36.854Chris Bovis34.880Peter Shadowen24.830Peter Shadowen
Acura IntegraFP21:37.623Ken Kannard1:37.924Ken Kannard1:37.623Ken Kannard123.6Ken Kannard37.585Ken Kannard0.792Ken Kannard24.740Ken Kannard
Mazda MiataFP/GTL91:38.226Mason Workman1:38.226Mason Workman1:38.568Mason Workman122.6Mason Workman37.238Mason Workman0.778Stephen Simonds25.160Mason Workman
Mazda RX-7GTL11:38.769Michael Lewis1:39.220Michael Lewis1:38.769Michael Lewis112.5Michael Lewis37.219Michael Lewis35.828Michael Lewis25.388Michael Lewis
BMW 325esFP11:38.885Matt Reppert1:38.885Matt Reppert1:38.946Matt Reppert122.1Matt Reppert37.730Matt Reppert35.717Matt Reppert25.209Matt Reppert
Honda Civic Del Sol VTECFP11:39.386Cliff Ira1:39.502Cliff Ira1:39.386Cliff Ira124.2Cliff Ira37.937Cliff Ira35.234Cliff Ira25.476Cliff Ira
Toyota TercellGTL11:41.074Graham Fuller1:44.073Graham Fuller1:41.074Graham Fuller112.9Graham Fuller38.847Graham Fuller36.124Graham Fuller26.086Graham Fuller
Fiat 124 SpiderFP12:08.730Douglas Sanders2:08.730Douglas Sanders91.2Douglas Sanders50.604Douglas Sanders42.988Douglas Sanders34.387Douglas Sanders

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

Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta → Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta 2023-03-10 to 2024-03-08

GTL Please classify Fields Cardinal V8

#33784 from James Rogersn · Rule change · TB 23-05 (2023-05 Fastrack)

Summary

cars addedFields Cardinal V8 classified in GT1 with Ford V8 engine, 4.9L displacement, 2100 lbs minimum weight.

As printed in 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

Show 6 more lines

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.

FP Classification Request for 1978 Toyota Celica

#34097 from Bob Pharr · Rule change · TB 23-05 (2023-05 Fastrack)

Summary

cars added1978-80 Toyota Celica classified FP Prep Level 2, 2100-2205 lbs, 2190cc SOHC, 11.0:1 compression, .450" valve lift max.

As printed in Fastrack

In FP Spec Lines, classify Toyota Celica (78-80) as follows:

A specification table follows in the original; it is not shown here.

FP Request to Classify Sonic and Fiesta in HP

#34264 from Greg Amy · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

wordingFord Fiesta HP and Chevrolet Sonic FP model year ranges extended from 2016 to 2019.

As printed in Fastrack

In HP, adjust model years of the "Ford Fiesta (11-16)" spec line as follows:
"Ford Fiesta (11-16 9)"
In FP, adjust model years of the "Chevrolet Sonic (12-16)" spec line as follows:
"Chevrolet Sonic (12-16 9)"

FP ITC to FP?

#34286 from David Snow · Rule change · TB 23-06 (2023-07 Fastrack)

Summary

cars addedHP Volkswagen Rabbit Cabriolet 1780 removed; Rabbit 1588 and 1715 reclassified with engine sizes and year ranges specified.

As printed in Fastrack

In HP Spec Lines, Volkswagen Rabbit Cabriolet 1780, delete in its entirely:
In HP, Spec Lines, Volkswagen Rabbit, change Title as follows:
“Volkswagen Rabbit 1588 (includes Cabriolet / convertible)”
“Volkswagen Rabbit 1715 (81-84) (excl. conv.)”
“Volkswagen Rabbit GTI 1780 (83-84)”

FP Correct Intake Valve Size on 1500cc Midget/Spitfire

#34419 from Production Committee · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

wordingFP and HP Sprite, Midget, and Spitfire 1500 intake valve size corrected to 36.6/(1.44).

As printed in Fastrack

In FP Spec Lines, Austin-Healey Sprite Mk. I, II,III, IV MG Midget Mk I,II, III, IV & 1500, change Intake Valve Size as follows:
"(I) 36.65.3/(1.44)"
In FP Spec Lines, Triumph Spitfire Mk. IV & 1500, change Intake Valve Size as follows:
"(I) 36.65.5/(1.440)"
In HP Spec Lines, Triumph Spitfire 1500, change Intake Valve Size as follows:
"(I) 36.65.5/(1.440)"
In HP Spec Lines, Triumph Spitfire Mk. III & IV 1500, change Intake Valve Size as follows:
"(I) 36.65.5/(1.440)"

GTL Weight for Nissan Sentra/200SX A 1400's

#34918 from Wilson Wright Jr · Rule change · TB 23-11 (2023-11 Fastrack)

Summary

fasterGTL Nissan Sentra/200SX A14 engine weight reduced from 1850 lbs to 1800 lbs.

As printed in Fastrack

In GTL Spec Lines, GTL Engines - NISSAN, Engine Family A14, change weight as follows:
"1850 1800"

GTL 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)

Summary

wordingGTL spec lines moved to contiguous position with GT2 and GT3; GTA category and spec lines renumbered and moved behind GTL.

As printed in 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

Show 24 more lines

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.

GTL Small Engines in GT Lite

#34842 from Peter Zekert · Rule change · TB 23-12 (2023-09 Fastrack)

Summary

fasterGTL small unrestricted engines under 1399cc lose 40-50 lbs across Alfa, AMC, Triumph, Mini, Sprite, Fiat, Ford, Honda, Mazda, Nissan, Subaru, Toyota, Volkswagen.

As printed in Fastrack

In GCR, GTL Cars, create new sub chart as follows:
In GTL change weights for unrestricted engines under 1399cc as follows:
Alfa Romeo 1130cc 1605 1565
1290cc 1605 1565
1357cc 1605 1565
AMC/Renault 1289cc 1660 1619
Triumph Spitfire 1147cc 1530 1492
mini 1275cc 1570 1531

Show 29 more lines

1380cc 1650 1609
Sprite/Midget 1275cc 1680 1638
1380cc 1760 1716
1399cc 1780 1738
mini w/X-Flow Head 1275cc 1700 1675
Sprite/Midget w/X-Flow Head 1275cc 1810 1765
Triumph Spitfire 1296cc 1680 1638
Fiat 1116cc 1365 1331
1290cc 1595 1555
Fiat w/1500 block 1290cc 1620 1579
Ford 1198cc 1550 1511
1297cc 1550 1511
Honda 1170cc 1590 1550
1237cc 1675 1633
Mazda 1272cc 1680 1638
1296cc 1645 1604
Nissan 1171cc 1550 1511
1237cc 1645 1604
1310cc 1685 1643
A12 W/a14 block 1237cc 1665 1623
1288cc 1720 1677
Nissan 1368cc 1760 1716
Subaru 1189cc 1545 1506
1267cc 1675 1633
Toyota 1166cc 1610 1570
1290cc 1645 1604
Volkswagen
Siamesed Intake Port 1285cc 1520 1482
Dual Intake Port 1285cc 1615 1575

FP Porsche 944/924S Rule Change Request

#35002 from Adam Achepohl · Rule change · TB 23-12 (2023-12 Fastrack)

Summary

cars addedEP Porsche 944/924S combines 2.5L and 2.7L variants with new weights: 2250–2415 lbs depending on engine and year.

As printed in Fastrack

In EP Spec Lines, delete the Porsche 944/924S 2.5L (2V) (83-88) spec line entirely, and create a new spec line for Porsche
944/924S 2.5L(2V) 2.7L(2V) (83-89) as follows:

A specification table follows in the original; it is not shown here.

GTL Request to Classify Honda Fit body in GTL

#35020 from Peter Zekert · Rule change · TB 23-12 (2023-09 Fastrack)

Summary

cars addedGTL Honda Fit 2009-13 2-door FWD classified with wheelbase options 94.0, 97.0, or 99.0 inches.

As printed in Fastrack

In GTL Honda Cars, classify Honda Fit as follows:
GTL HONDA Cars -
Model Years Body Style Drive-line Wheel-base (in) Notes
FIT 2009-13 2 Dr. FWD 99.0 Alternate wheel bases
94.0”
97.0”

FP FP and HP Toyota Corolla

#35030 from Keith Church · Rule change · TB 23-12 (2023-12 Fastrack)

Summary

fasterFP Toyota Corolla 2TC loses 43 lbs to 1810; HP Corolla loses 50–52 lbs to 1910–2006.

As printed in Fastrack

In FP Spec Lines, Toyota Corolla 2TC (71-74), change weight as follows:
"1853 1810"
In HP Spec Lines, Toyota Corolla (71-74), change weight as follows:
“1960 1910
* 2009 1958
** 2058 2006”

FP Triumph GT6 Adjustments

#35054 from ANTHONY PARKER · Rule change · TB 23-12 (2023-12 Fastrack)

Summary

fasterEP Triumph GT6 minimum weight reduced to 1800 lbs.

As printed in Fastrack

In EP Spec Lines, Triumph GT6, change weight as follows:
"1830 1800"

FP FP data

#35060 from Production Committee · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

slowerFP Acura Integra LS and Honda Del Sol VTEC minimum weights increase 25–78 lbs across all configurations.

As printed in Fastrack

In FP Spec Line, Acura Integra LS (94-01), change weight as follows:
"2235 2260
*2291 2317
**2347 2373"
In FP Spec Line, Honda Del Sol VTEC (94-97), change weight as follows:
"2190 2265
*2245 2322
**2300 2378"

Applies to Acura Integra on this page: Ken Kannard, Les Chaney

Applies to Honda Civic Del Sol VTEC on this page: Cliff Ira

FP Request to Review Z3 2.5 Spec Line

#35073 from Tim Schreyer · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

slowerEP BMW Z3 2.5L weight increases to 2500 lbs, 2563 lbs with turbo, 2625 lbs with supercharger.

As printed in Fastrack

In EP spec line, BMW Z3 2.5L, change weight as follows:
"2450 2500
*2511 2563
**2573 2625"

GTL Rotary Engine 12A Rotor Housings

#35131 from Tony Rivera · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

wordingGTL Mazda 12A rotary engines may machine and use 13B housing to O.E. 12A specifications.

As printed in Fastrack

In GT3 Engines - Mazda Spec Lines, add to Notes as follows:
12A Street Port: "Contact National Office for specific details of various allowable port configurations. May machine and use 13B
housing to O.E. 12A spec’s."
12A Bridge Port: "Optional choke size 42mm @2010lbs. May machine and use 13B housing to O.E. 12A spec’s."
12A Peripheral Port @ 2150lbs: "May machine and use 13B housing to O.E. 12A spec’s."
12A Peripheral Port @ 2300lbs: "Disenfranchised GT2* May machine and use 13B housing to O.E. 12A spec’s."

GTL Request to Include Toyota GR86 in GTL

#35198 from Erik Madsen Madsen · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

cars addedGTL Toyota GR86 (DR86, 2021-2024, 2-door RWD, 101.3-inch wheelbase) newly classified.

As printed in Fastrack

In GTL Cars - TOYOTA Spec Lines, classify DR86 as follows:
GTL Cars - TOYOTA
Model Years Body Style Drive-line Wheel-base (in) Notes
DR86 2021-2024 2 DR RWD 101.3

GTL Errors and Omissions, GTL engines & Cars

#35226 from Peter Zekert · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

wordingGTL BMW Mini years corrected to 2002-2013.

As printed in Fastrack

In GTL Cars - BMC thru Rover Group Spec Lines, BMW Mini, change Years as follows:
"2002-2013"

FP Corrections to Honda Spec Lines in FP

#35250 from Jonathan Spiegel · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

unclearFP Honda throttle body specs corrected: Civic 1.5 to 42", Si to 55", CRX variants adjusted.

As printed in Fastrack

In FP Spec Lines, change Fuel Injected Equipped Throttle Body Inside Diameter as follows:
Acura Integra GSR (92-93): "58"
Honda Civic 1.5 (88-91): "NA 42"
Honda Civic EX (90-91): "55"
Honda Civic Si (88-91): “42 55”
Honda CRX 1.5 (88-91): “33 (primary) 42 (secondary) 42”
Honda CRX / CRX Si (84-87): ”42 33 (primary) 42 (secondary)”
Honda CRX Si (88-91): ”NA 55”

FP Miata Alternate Head

#35253 from Don Tucker · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

fasterEP Mazda MX-5 1.8L 1990-97 minimum weight drops to 2150 lbs; 1994-97 variants to 2000, 2050, 2100 lbs respectively.

As printed in Fastrack

In EP Spec Lines, Mazda MX-5 /Miata 1.8L (90-97), change weight as follows:
"2200 2150"
Mazda MX-5 /Miata (94-97)
"2035 2000
*2086 2050
**2137 2100"

FP Triumph GT6 Adjustments

#35255 from Anthony Parker · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

fasterEP Triumph GT6 dual 1.75" carbs weight drops to 1940 lbs; triple Weber 40 DCOE options consolidated.

As printed in Fastrack

In EP spec line, Triumph GT6, make the following change in the Notes section:
"Two (2) 1.75” auto-type carburetors @ 1970 40 lbs. Three (3) Weber 40 DCOE on IR manifold with 28mm chokes @ 1990
lbs. Laycock overdrive, May use 5 speed gearbox w/o overdrive. Three (3) Weber 40mm DCOE w/28mm venturi on individual
runner manifold @ 2020 lb."

FP Honda S2000 throttle body

#35272 from Aaron Johnson · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

fasterEP Honda S2000 fuel injected throttle body inside diameter increases from 62mm to 64mm.

As printed in Fastrack

In EP spec line, Honda S2000, make the following changes to its spec line:
Fuel Injected Equipped Throttle Body Inside Diameter: "62 64"
Notes: "Comp. Ratio limited to 12.0:1. Valve lift limited to .500”. An adaptor plate can be used to mount the 62mm throttle body
from '00-05 to the '06-09 intake manifold. The adaptor plate can be no more than 1.25" thick, and its bore must not exceed the
"Fuel Injected Equipped Throttle Body Inside Diameter" maximum spec of 64mm."

FP Correction within Triumph TR8 Spec Line

#35315 from Production Committee · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

wordingEP Triumph TR8 dry sump allowance moved from carburetor line to notes section.

As printed in Fastrack

In EP spec line, Triumph TR8 (78-81), move the "Dry sump allowed" wording to the appropriate location as follows:
Carburetor. No. & Type: “Zenith Stromberg carbs or fuel injection. Dry sump is allowed.”
Notes: “Comp. Ratio limited to 12.0:1, Valve lift limited to .500”. Dry sump is allowed.”

FP Correction to EP 924S/944 Spec Line

#35317 from Production Committee · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

wordingEP Porsche 944/924S 2.5L and 2.7L weight minimums corrected: 2479cc to 2306/2363 lbs, 2681cc to 2358/2415 lbs.

As printed in Fastrack

In EP spec line, Porsche 944/924S 2.5L (2V) / 2.7L (2V) (83-89), change Weight as follows:

A specification table follows in the original; it is not shown here.

GTL Rear Blade Spoiler Clarification

#35261 from Butch Kummer · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

fasterGT1, GT2, GT3, GTL, GTX rear spoiler maximum surface area limit of 295.0 square inches removed.

As printed in 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.”

FP Update 1988-1991 Civic to Match 1988-1991 CRX

#35399 from Enrik Benazic · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

fasterHP Honda Civic 1.5 (88-91) weight reduced to 2175 lbs base, 2229 lbs with power adder, 2284 lbs with two.

As printed in Fastrack

In HP, make the following weight change:
Honda Civic 1.5 (88-91)
“2245 2175
*2301 2229
**2357 2284”

GTL GT Direct Injection allowance and rules

#35437 from Grand Touring Committee · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

fasterGT1/GT2/GT3/GTL/GTX Direct Injection now permitted if OE, using only OE pump, hoses, injectors.

As printed in 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.”

GTL GT2/3 remove Direction Injection not allowed in Spec line notes

#35439 from Grand Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)

Summary

fasterGT2/3 Nissan, Mazda, Mitsubishi 4G93, QR25DE/DD, QE25DE/DD Direct Injection now permitted per 9.1.2.F.7.5.E.

As printed in 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.”

FP GCR Correction - Redundant HP Spec Lines

#35623 from Production Committee · Rule change · TB 24-03 (2024-03 Fastrack)

Summary

wordingHP removes four redundant VW spec lines: Rabbit Cabriolet 1780, Scirocco 1588, Scirocco 1780 8-valve, Scirocco 1588.

As printed in Fastrack

In HP Spec Lines, delete the following redundant spec lines in their entirety:
Spec line #10 - VW Rabbit Cabriolet 1780
Spec line #3 - VW Scirocco 1588
Spec line #4 - VW Scirocco 1780 (8-valve) (83-88)
Spec line #5 - VW Scirocco 1588

FP Update FP Protege (01-03) Model Info

#35715 from Production Committee · Rule change · TB 24-03 (2024-03 Fastrack)

Summary

wordingFP Mazda Protégé ES (01-03) model designation updated to include /5 variant.

As printed in Fastrack

In FP Spec Lines, Mazda Protégé ES (01-03) change vehicle as follows:
"Mazda Protégé ES/5 (01-03)"

Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta → Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta 2024-03-08 to 2025-03-07

GTL Request for Spec Line 1010 Reconsideration

#35009 from Kristofer Olson · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

slowerGT2-ST Acura NSX minimum weight raised to 3000 lbs, restrictor increased to 45mm TIR.

As printed in Fastrack

In GT2-ST Spec Lines, Acura NSX, change as follows:
Minimum Weight: "2700 3000"
Restrictor: "43 45mm TIR"

GTL Allow 34 mm chokes for the Datsun 510

#35661 from James Bell · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

slowerGTL Datsun 510 L16 Limited Prep allows 34 mm chokes, minimum weight rises to 2000 lbs.

As printed in Fastrack

In GTL Engines-NISSAN Spec Lines, change L16 (Limited Prep) as follows:
Fuel Induction: "32 34mm"
Weight: "1950 2000"

FP Request to Replace CRX Plastic Panels

#35876 from Darryl Saylor · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

wordingFP Honda CRX 84-87 can replace plastic front header, rocker skirt, door cap panels with stock-appearance replicas in alternate materials.

As printed in Fastrack

In FP spec line "Honda CRX / CRX Si (84-87)", add the following wording to the Notes section:
"The plastic OE front header/nose body panel, lower rocker side-skirt, and lower door cap panel can be replaced by a
replica, which may be constructed of an alternate material, provided its appearance remains stock."

FP FP data and parity

#35896 from Production Committee · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

slowerFP Acura Integra and Honda Civic models now require 55mm Flat Plate Intake Restrictor.

As printed in Fastrack

In the following FP spec lines, add the following wording to the Notes section:
Acura Integra (90-93)
Acura Integra LS (94-01)
Acura Integra GSR (92-93)
Honda Civic Del Sol VTEC (94-97)
Honda Civic Si (99-00)
"55mm Flat Plate Intake Restrictor is required."

FP NIssan 300ZX Z31 to EP

#35830 from Murphy Nichols · Rule change · TB 24-06 (2024-06 Fastrack)

Summary

cars addedNissan 300ZX 84-89 classified to EP at 2550 lbs minimum, 2960cc 6-cyl SOHC, fuel injection, 12.0:1 compression limit, 0.500" valve lift limit.

As printed in Fastrack

In EP Spec Lines, classify Nissan 300ZX (84-89), as follows:

A specification table follows in the original; it is not shown here.

FP RX7 1993 and Up Request In EP Spec Lines, classify

#36031 from Edward Zabinski · Rule change · TB 24-06 (2024-06 Fastrack)

Summary

cars addedMazda RX-7 92-97 newly classified EP Prep Level 2 at 2200–2310 lbs with 13B 6-port rotary engine.

As printed in Fastrack

Mazda RX-7 (92-97) as follows:

A specification table follows in the original; it is not shown here.

FP Clean-up Multiple EP RX-8 Spec Lines In EP

#36156 from Production Committee · Rule change · TB 24-06 (2024-06 Fastrack)

Summary

wordingEP Mazda RX-8 (04-11) alternate spec line removed; one primary line remains.

As printed in Fastrack

Spec Lines, make the following changes to the two Mazda RX-8 spec lines.
Remove spec line entirely:
Mazda RX-8 (04-11)
Remove the wording "alternate":
Mazda RX-8 (04-11)(alternate)
Spec Mazda (SM/SMX) None.

GTL Add GTL to GT3 choke option line.

#36236 from Grand Touring Committee · Rule change · TB 24-07 (2024-07 Fastrack)

Summary

unclearGTL added to GT3 choke option line for induction control.

As printed in Fastrack

In GCR, Section 9.1.2.E.13.n. after 8, change as follows:
"For GT3 and GTL (GTLite) only:"

FP Errant entry in HP production line item

#36231 from Angus Crome · Rule change · TB 24-08 (2024-08 Fastrack)

Summary

wordingHP Volkswagen Golf and Jetta 85-92 track correction: front 1537mm (60.5in), rear 1529mm (60.2in).

As printed in Fastrack

In HP Spec Lines, change Track (F/R)mm/(in.) as follows:
Volkswagen Golf (GTI, GT, GL) (85-92): "2 1537/1529 (60.5/60.2)"
Volkswagen Jetta (GLI, GL) (85-92): "2 1537/1529 (60.5/60.2)"

GTL Request to Include Toyota GR86 in GTL

#36324 from Erik Madsen · Rule change · TB 24-09 (2024-09 Fastrack)

Summary

cars addedGTL adds Toyota GR86 2021-2023, 2dr RWD, 101.3 in wheelbase.

As printed in Fastrack

In GTL Spec Lines, Cars - Toyota, classify GR86 as follows:
GTL Cars -TOYOTA
Model Years Body Style Drive-line Wheelbase (in) Notes
GR86
(Effective
11/1/2024)
2021-2023 2dr RWD 101.3

GTL Inclusion of Modified Spec Miata for GTL competition

#36325 from Erik Madsen · Rule change · TB 24-09 (2024-09 Fastrack)

Summary

cars addedGTL adds Spec Miata 1990-2005 with legal Spec Miata engine and intake system.

As printed in Fastrack

In GTL Spec Lines, Cars - Mazda, classify=Spec Miata as follows:
GT3 Cars - MAZDA
Model Years Body Style Drive-line Wheelbase (in) Notes

A specification table follows in the original; it is not shown here.

GTL Include Mazda MX5 RF 2017- in GTL

#36428 from Erik Madsen · Rule change · TB 24-09 (2024-09 Fastrack)

Summary

cars addedMazda MX5 RF 2017- added to GTL with 91.0 inch wheelbase.

As printed in Fastrack

In GTL Spec Lines, Cars - MAZDA, classify MX5 RF as follows:
GTL Cars -MAZDA
Model Years Body Style Drive-line Wheelbase (in) Notes
MX5 RF
(Effective
11/1/2024)
2017- 91.0

FP Errors/emissions Honda Civic/CRX

#36700 from Martin Burk · Rule change · TB 24-10 (2024-10 Fastrack)

Summary

fasterFP Honda CRX/CRX Si 84-87 block material changes from Iron to Alum.

As printed in Fastrack

In FP Spec Lines, Honda CRX / CRX Si (84-87), change Block Mat'l as follows:
"Iron Alum"

Applies to Honda CRX on this page: Chris Bovis

FP 1275 HP Spridget Level 2 Only

#36518 from Darryl Saylor · Rule change · TB 24-09 (2024-09 Fastrack)

Summary

fasterHP Sprite and Midget 1275cc and 1098cc Level 2 compression ratio raised to 12.0:1.

As printed in Fastrack

In HP Spec Lines, Austin-Healey Sprite MkI, II, III, IV MG Midget (ALL) - Level 2 - 1275cc, change Notes as follows:
"(Effective 11/1/2024) Compression ratio limited to 11 12.0:1"
In HP Spec Lines, Austin-Healey Sprite MkI, II, III, IV MG Midget (ALL) - Level 2 - 1098cc, change Notes as follows:
"(Effective 11/1/2024) Compression ratio limited to 11 12.0:1"

GTL G16E-GTS Fuel Injection Spec Line Change

#36588 from Isaac Preston · Rule change · TB 24-10 (2024-10 Fastrack)

Summary

unclearGTL Toyota G16E-GTS removes direct injection ban wording, effective 11/1/2024.

As printed in Fastrack

In GTL Spec Lines, Engines - Toyota, G16E-GTS, change Notes as follows:
"No Turbo, (Effective 11/1/2024)No Direct injection."

GTL GTL Alternate Weight and Choke Option for L16 engine

#36653 from Roger Welling · Rule change · TB 24-10 (2024-10 Fastrack)

Summary

fasterGTL Nissan L16 limited prep gains alternate 32mm choke option at 1910 lbs minimum weight.

As printed in Fastrack

In GTL Spec Lines, Engines - NISSAN, L16 (limited Prep), change notes as follows:
"(Effective 11/1/2024) Alt. chokes: 32mm @1910 lbs. Comp. Ratio limited to 12.0:1. Valve lift limited to .450”. Valve size: (I)
41.9mm (E) 33.0mm. Drysump and alternate connecting rods allowed. Refer to PCS 9.1.5.E.2.a.e.f.g.h.i for permitted limited
level 2 build specs."

FP Request to Reduce Weight of BMW 325i/is E30 (84-91) Spec Line

#37119 from Tim Schreyer · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

fasterEP BMW 325i/is E30 (84-91) weight reduced 50–52 lbs across three spec lines to 2150, 2204, 2258.

As printed in Fastrack

In EP SPEC LINES, BMW 325i/is (E30) (84-91), change Weight as follows:
"2200 2150
*2255 2204
**2310 2258"

GTL Correct language regarding OEM Areo Devices

#37137 from Christopher Childs · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

wordingTA2 rear wing height rule clarified: OEM aerodynamic devices exempt from peak-of-roof requirement.

As printed in 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.

FP Fix Error in Spridget Spec Line

#37437 from Jason Stine · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

wordingFP Spridget and Midget 1275cc and 1500cc spec line corrections to bore, stroke, displacement, and valve sizes.

As printed in Fastrack

In FP SPEC LINES, Austin-Healey Sprite Mk. I, II,III, IV MG Midget Mk I,II, III, IV & 1500, change the following:
1275cc:
Bore x Stroke: "68.1x78.4 (2.68x3.09) 70.6x81.3 (2.78x3.20)"
Displacement: "(77.78) 1275"
Valves IN & EX: "(I) 32.1/(1.26) (E) 28.4/(1.12) (I) 33.3/(1.31) (E) 29.5/(1.16)"
1500cc:
Bore x Stroke: "1.1x84.3 73.7x87.4 (2.90x3.44)"
Displacement: "1491 (90.95) 1493"

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Valves IN & EX: "(I) 36.6/(1.44) (E) 28.7 29.7/(1.17)"

FP Create ruleset that allows GTL cars to run in FP

#37485 from Club Racing Board · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

cars addedF Production now allows GT-Lite cars meeting Appendix N specifications to compete, effective 2025-01-01.

As printed in Fastrack

“(Effective January 1, 2026) (Effective January 1, 2025)." Any GT-Lite (GTL) car meeting all of the requirements of Appendix N
GT-LITE CATEGORY SPECIFICATIONS for inclusion into F PRODUCTION" may compete in the F-Production class. For GTL cars
competing in FP, the level of preparation and modifications will be determined by Appendix N and not by PCS 9.1.5.”

FP Effective date for Jan 2025 GCR updates

#37654 from Doug Piner · Rule change · TB 25-02 (2025-02 Fastrack)

Summary

slowerEP BMW Z3 2.5L requires 52mm flat plate intake restrictor; Z3 2.8L 55mm; 328i/is E36 58mm; 328i/ci E46 58mm; 325i/is E46 56mm; 325i/is E36 56mm; 325is M-Technic 56mm.

As printed in Fastrack

In EP Spec Lines, add to Notes as follows:
BMW Z3 2.5LL "(Effective 2/21/2025) 52mm Flat Plate Intake Restrictor is required."
BMW Z3 2.8L (97-00): "(Effective 2/21/2025) 55mm Flat Plate Intake Restrictor is required."
BMW 328i/is E36 (96-99): "(Effective 2/21/2025) 58mm Flat Plate Intake Restrictor is required."
BMW 328i/ci E46 (01-06): "(Effective 2/21/2025) 58mm Flat Plate Intake Restrictor is required."
BMW 325i/is E46 (01-06): "(Effective 2/21/2025) 56mm Flat Plate Intake Restrictor is required."
BMW 325i/is E-36 (92-95): "(Effective 2/21/2025) 56mm Flat Plate Intake Restrictor is required."
BMW 325is M-Technic (1994): "(Effective 2/21/2025) 56mm Flat Plate Intake Restrictor is required."

FP Request Competition Adjustment to BMW Z3 2.5L

#37120 from Tim Schreyer · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

slowerEP BMW Z3 and 3-series models get smaller intake restrictors: Z3 2.5L to 52mm, Z3 2.8L to 55mm, 328i to 58mm, 325i to 56mm.

As printed in Fastrack

In EP Spec Lines, change Notes as follows:
BMW Z3 2.5LL "(Effective 3/1/2025) 56mm 52mm Flat Plate Intake Restrictor is required."
BMW Z3 2.8L (97-00): "(Effective 3/1/2025) 59mm 55mm Flat Plate Intake Restrictor is required."
BMW 328i/is E36 (96-99): "(Effective 3/1/2025) 62mm 58mm Flat Plate Intake Restrictor is required."
BMW 328i/ci E46 (01-06): "(Effective 3/1/2025) 62mm 58mm Flat Plate Intake Restrictor is required."
BMW 325i/is E46 (01-06): "(Effective 3/1/2025) 60mm 56mm Flat Plate Intake Restrictor is required."
BMW 325i/is E-36 (92-95): "(Effective 3/1/2025) 60mm 56mm Flat Plate Intake Restrictor is required."
BMW 325is M-Technic (1994): "(Effective 3/1/2025) 60mm 56mm Flat Plate Intake Restrictor is required."

FP Interpretation of Production Rules on Mirrors

#37235 from Lawrence Slivinski · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

wordingEP, FP, HP: interior or exterior mirrors meeting rule 9.3.36 now permitted.

As printed in Fastrack

In GCR, add new rule as Section 9.1.5.E.10.f:
"Any interior or exterior mirror(s) that meets rule 9.3.36 may be used."

FP FP Class Adjustments

#37458 from Production Committee · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

slowerFP Acura Integra and Honda Civic models get smaller 51mm intake restrictors, down from 55mm; Del Sol VTEC weight increases to 2290–2405 lbs.

As printed in Fastrack

In FP SPEC LINES, change Notes as follows:
Acura Integra (90-93): "(Effective 3/1/2025) 55mm 51mm Flat Plate Intake Restrictor is required."
Acura Integra LS (94-01): "(Effective 3/1/2025) 55mm 51mm Flat Plate Intake Restrictor is required."
Acura Integra GSR (92-93): "(Effective 3/1/2025) 55mm 51mm Flat Plate Intake Restrictor is required."
Honda Civic Si (99-00): "(Effective 3/1/2025) 55mm 51mm Flat Plate Intake Restrictor is required.
In FP SPEC LINES, change as follows:
Honda Civic Del Sol VTEC (94-97): "
Weight: "(Effective 3/1/2025) 2265 *2322 **2378 2290 *2347 **2405

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Notes: "(Effective 3/1/2025) 55mm 51mm Flat Plate Intake Restrictor is required."

FP Weight Reduction for Honda S2000

#37466 from Michael Unger · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

fasterEP Honda S2000 1997cc base loses 75 lbs to 2375; 2157cc base loses 60 lbs to 2450.

As printed in Fastrack

In EP, Spec Lines make the following weight changes:

A specification table follows in the original; it is not shown here.

FP Mazda 1999 Miata 1.8L

#37488 from Joe Carr · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

fasterEP Mazda MX-5/Miata 99-05 minimum weight drops to 2100 lbs, 2153 lbs with power adder, 2205 lbs with two adders.

As printed in Fastrack

In EP Spec Lines, make the following weight change:
Mazda MX-5 /Miata (99-05):
"2150 2100
*2204 2153
**2258 2205"

FP Errors & Omissions

#37648 from Bryan Floyd · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

cars addedFP GTL Volkswagen Jetta Mark IV 4dr FWD 98.2 wheelbase newly classified.

As printed in Fastrack

In FP Spec Lines, Appendix N, GTL-FP Cars - Volkswagen, classify Jetta Mark - IV as follows:
GTL-FP Cars - VOLKSWAGEN
Model Years Body Style Drive-line Wheelbase (in) Notes
Jetta Mark - IV 4dr FWD 98.2

FP GTL/FP consolidation 2025 Rules

#37659 from James Gregorius · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

inductionFP Spec Lines option: carburettor chokes permitted as alternative to SIR, same size as listed SIR.

As printed in Fastrack

In FP Spec Lines, Appendix N: L.9, Fuel Injection System, add the following:
"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."

Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta → Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta 2025-03-07 to 2026-03-06

FP Request for Classification of Chevrolet Spark

#37755 from Kristian Smith · Rule change · TB 25-04 (2025-04 Fastrack)

Summary

cars addedChevrolet Spark 16-22 classified HP Pre at 1850 lbs minimum weight, fuel injected, 1399 cc.

As printed in Fastrack

In HP Spec Lines, classify the Chevrolet Spark (16-22):

A specification table follows in the original; it is not shown here.

FP Request to Lower Ford Festiva Minimum Weight to 1600 LBS

#37939 from Doug DeRonne · Rule change · TB 25-04 (2025-04 Fastrack)

Summary

fasterHP Ford Festiva 88-93 minimum weight drops to 1600 lbs, variants to 1640 and 1680 lbs; compression ratio raised to 11.0:1.

As printed in Fastrack

In HP Spec Lines "Ford Festiva (88-93)" change as follows:
Weight:
"1700 1600
*1743 1640
**1785 1680"
Notes:
"Compression ratio limited to 10.5 11.0:1. Valve lift limited to .450”."

FP Base Weight Adjustment for H-Production X1/9 Spec Lines

#38255 from Matthew Brannon · Rule change · TB 25-06 (2025-06 Fastrack)

Summary

fasterHP Fiat X-1/9 base weights reduced 50–53 lbs across 1300 and 1500 spec lines.

As printed in Fastrack

In HP Spec Lines, change Weight as follows:
Fiat X-1/9 & Bertone1500: “1790 1740 *1835 1784 **1880 1827”
Fiat X-1/9 1300: “1650 1600 *1691 1640 **1733 1680”
Fiat X-1/9 1300: “2060 2010”
Fiat X-1/9 1500: “1950 1900”

FP BMW Z4 update

#38490 from Bryce McGuire · Rule change · TB 25-07 (2025-07 Fastrack)

Summary

slowerEP BMW Z4 03-05 restricted to 52mm flat plate intake restrictor.

As printed in Fastrack

In EP Spec Lines, BMW Z4 (03-05), add to Notes the following:
“52mm Flat Plate Intake Restrictor.”

FP EP Fiat 124 Spider Competition Adjustment Request

#38498 from John Baucom · Rule change · TB 25-07 (2025-07 Fastrack)

Summary

fasterEP Fiat 124 Spider 1600 & 2000 weight drops 50 lbs to 2000; carburetors gain 2mm chokes to 36mm.

As printed in Fastrack

In EP Spec Lines, Fiat 124 Sport Spider 1600 & 124 Spider 2000, change as follows:
Weight: "2050 2000"
Carburetor No. & Type: "(2) Weber 40 IDF-40IFI, (2) Solex C40P116, 34 36mm choke(s) req’d, (2) Weber 45DCOE w/ 34 36 mm
choke(s) on I.R. manifold or fuel injection."

FP HP Plymouth Arrow spec omission

#38995 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

wordingHP Plymouth Arrow transmission max speeds clarified to 4 or 5.

As printed in Fastrack

In HP Spec Lines, Plymouth Arrow (76-80), add the following wording to Trans. Speeds(max):
"4 or 5"

FP Add Wheel Diameter to Appendix G

#39008 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

wordingEP, FP, HP wheel diameter added to Appendix G as absolute maximum specification.

As printed in Fastrack

In Appendix G.2.3, change as follows:
"Rim width and diameter are is absolute maximums."

FP Add TB ID tolerance to general Prod rules

#39009 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

wordingEP, FP, HP throttle body inside dimensions must remain stock with +/-.25mm tolerance; butterfly dimensions stock in FP, HP only.

As printed in Fastrack

In GCR, Section 9.1.5.E., change as follows:
9.1.5.E.1.b.4: "The inside dimensions of the throttle body casting/housing (as measured at the throttle butterfly) must remain
stock (tolerance of +/-.25mm), but the throttle body can otherwise be ported and polished."
9.1.5.E.2.b.4: "The inside dimensions of the throttle body casting/housing and all dimensions of the throttle butterfly must
remain stock (tolerance of +/-.25mm)."

FP Please Lower Weight of 280Z

#38871 from Matthew Miller · Rule change · TB 25-09 (2025-09 Fastrack)

Summary

fasterEP Nissan 280Z minimum weight reduced from 2560 to 2400 lbs.

As printed in Fastrack

In EP Spec Lines, Nissan 280Z, change Weight (lbs) as follows:
"(Effective 11/1/2025) 2560 2400
*2624 2460
**2688 2520"

FP Miata Weight Adjustment Follow Up

#38949 from Don Tucker · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

fasterEP Mazda MX-5 1.8L 90-97 weight reduced to 2125 lbs from 2150 lbs.

As printed in Fastrack

In EP Spec Lines, Mazda MX-5 / Miata 1.8L (90-97), Effective 11/1/2025 make the following weight change:
"2150 2125"

FP Weight Break for 1098 Midget / Sprite

#38970 from Kendall Jones · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

fasterHP Austin-Healey Sprite/Midget 1098cc minimum weight drops 80 lbs to 1550.

As printed in Fastrack

In HP Spec Lines, Austin-Healey Sprite/Midget 1098cc, Effective 11/1/2025make the following weight change:
"1630 1550"

FP HP Volvo 142 spec omission

#38994 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

slowerHP Volvo 142/142E gains compression ratio limit 12.0:1 and valve lift limit .425".

As printed in Fastrack

In HP Spec Lines, Volvo 142/142E P-1800 Engine, Effective 11/1/2025 add the following wording to Notes:
"Comp. Ratio limited to 12.0:1. Valve lift limited to .425”."

FP HP Mini DOHC 1.6

#38996 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

slowerHP Mini Cooper 07-15 valve lift reduced to .390", from .450".

As printed in Fastrack

In HP Spec Lines, Mini Cooper (07-13) (includes 09-15 convertible and 12-15 Coupe), Effective 11/1/2025 make the following
changes to the Notes:
"Compression ratio limited to 11.0:1, Valve lift limited to .450”.390"."

FP 83-88 FP Scirocco Spec Line Creation

#38997 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

cars addedFP Scirocco 83-88 established as spec line with 1733–1803 lbs, 1715–1780 cc SOHC, 40/33 mm valves, Solex carbs or fuel injection.

As printed in Fastrack

In FP Spec Lines, classify Volkswagen Scirocco (83-88) as follows:

A specification table follows in the original; it is not shown here.

FP Add to Rabbit description

#39019 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

wordingFP and HP Volkswagen Rabbit descriptions updated: Convertible changed to Cabriolet in FP; Cabriolet added to three HP engine variants.

As printed in Fastrack

In FP Spec Lines, make the following spec line correction:
"Volkswagen Rabbit (Includes Convertible Cabriolet)"
In HP Spec Lines, make the following spec line correction:
"Volkswagen Rabbit 1588 (Includes Cabriolet)"
"Volkswagen Rabbit 1715 (Includes Cabriolet)"
"Volkswagen Rabbit 1780 (Includes Cabriolet)"

FP Clean-up 9.1.5.E.7e

#39025 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

wordingEP, FP, HP: rear drum brake to disc conversion clarified; rotors solid, diameter limited to largest front rotor permitted.

As printed in Fastrack

In GCR, Section 9.1.5.E.7., change as follows:
"e. Cars fitted with rear drum brakes, can convert to rear disc brakes without penalty. Note that the “Brakes Std.” and “Brakes
Alt.” listings on a vehicle’s spec line do not prohibit a car that was fitted with rear drum brakes stock, from converting to rear
disc brakes under this rule. When converting from rear drum brakes to rear disc brakes:
1. Rear brake rotors must be solid and can be no larger in diameter than the largest permitted front brake rotor, as defined on
the vehicle’s spec line.
2. Rear calipers and mounting brackets are unrestricted but must be made of a ferrous or aluminum material. The standard and
alternate brake listings on a vehicle’s specification line, does not prohibit a car that was fitted with rear drum brakes as stock

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from converting to rear disc brakes under this rule.
3. The “Brakes Std.” and “Brakes Alt.” listings on a vehicle’s spec line do not prohibit a car that was fitted with rear drum brakes
as stock from converting to rear disc brakes under this rule."

FP Add TB size to Ford Mustang (94-98) Spec Line

#39130 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

wordingEP Ford Mustang (94-98) fuel injected throttle body inside diameter specified at 60.

As printed in Fastrack

In EP Spec Lines, Ford Mustang (94-98) add the following to the Fuel Injected Equipped Throttle Body Inside Diameter column:
"60"

FP Correct Existing VW Scirocco Spec Line

#39140 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

fasterFP Volkswagen Scirocco: remove two engine variants (1715cc and 1780cc), lighten one variant to 1663 lbs, allow 15×7 wheels instead of 13×7.

As printed in Fastrack

In FP Spec Lines, Volkswagen Scirocco, change spec line as follows:

A specification table follows in the original; it is not shown here.

FP TR2 Notes E&O

#39180 from Anthony Parker · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

unclearEP Triumph TR2-TR4A allows 5-speed gearbox without overdrive; removes Weber carb and weight specification.

As printed in Fastrack

In EP Spec Lines, Triumph TR2, 3, 3A, 4, 4A, TR4, TR4A, IRS, make the following change to the Notes:
"Front apron assembly may be made of alternate material. Three (3) Weber 40 DCOE on IR manifold with 28mm chokes @ 1990
lbs. Laycock overdrive, may use 5 speed gearbox without overdrive."

FP Balance of Power

#39187 from Jim Simaras · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

slowerEP BMW Z3 2.5L restrictor reduced 52mm to 50mm, weight increased to 2550 lbs base; five other BMW models get smaller restrictors.

As printed in Fastrack

In EP Spec Lines, make the following changes to Restrictors:
BMW Z3 2.5L: "52mm 50mm Flat Plate Intake Restrictor"
BMW Z3 2.8L (97-00): "55mm 53mm Flat Plate Intake Restrictor"
BMW 328i/is E36 (96-99): "58mm 55mm Flat Plate Intake Restrictor"
BMW 328i/ci E46 (01-06): "58mm 55mm Flat Plate Intake Restrictor"
BMW 325i/is (E46) (01-06): "56mm 53mm Flat Plate Intake Restrictor"
BMW 325is M-Technic (1994): "56mm 53mm Flat Plate Intake Restrictor"
BMW 325i/is E-36 (92-95): "56mm 53mm Flat Plate Intake Restrictor"

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In EP Spec Lines, BMW Z3 2.5L, change Weight as follows:
"2500 2550
*2563 2614
**2625 2678"

FP Competition Adjustment Request

#39259 from David Strittmatter · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

fasterFP Lancia Scorpion minimum weight drops 80 lbs, to 1950.

As printed in Fastrack

In FP Spec Lines, Lancia Scorpion, change Weight as follows:
"2030 1950"

FP Factory Roll Bar Removal on VW Convertible

#39268 from Tim Linerud · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

wordingFP Volkswagen Rabbit Convertible no longer required to remove factory roll bar.

As printed in Fastrack

In FP Spec Line, Volkswagen Rabbit (Includes Convertible), remove the following wording in Notes:
"Factory roll bar must be removed on Cabriolet."

FP FP Parity Request

#39325 from Mason Workman · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

slowerFP Acura Integras and Honda Civics gain 50–79 lbs; Mazda Miata and Mercury Capri compression ratio to 11.0:1, valve lift to .425".

As printed in Fastrack

In FP, change Weight as follows:
Acura Integra (90-93):
"2235 2285
*2291 2342
**2347 2399"
Acura Integra LS (94-01):
"2260 2310
*2317 2368

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**2373 2426"
Acura Integra GSR (92-93):
"2325 2375
*2383 2434
**2441 2494"
Honda Civic Del Sol VTEC (94-97):
"2290 2340
*2347 2399
**2378 2457"
Honda Civic Si (99-00):
"2250 2300
*2306 2358
**2363 2415"
FP Spec Lines, change Notes as follows:
Mazda Miata 1.6L (90-97): "Comp. Ratio limited to 10.0:1 11.0:1, Valve lift limited to .390” .425"."
Mercury Capri 1.6L (91-94): "Comp. Ratio limited to 10.0:1 11.0:1, Valve lift limited to .390” .425"."

FP Adjust former-GTL Honda's with B/D-Series Engines

#39374 from Production Committee · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

slowerFP Honda B/D-series engines gain 105–120 lbs minimum weight across seven variants.

As printed in Fastrack

In GCR, Appendix N GTL inclusion into FP, Engines - HONDA, change Disp. (cc) – Weight (lbs) as follows:
"D15 – 1493cc – 1895 2000
D15b7 – 1493cc – 1895 2000
D16 – 1590cc – 1945 2055
D16A – 1590cc – 1945 2055
B16A – 1595cc – 1950 2065
B18 – 1797cc – 2050 2170
B18 – 1834cc – 2065 2185"

FP Request Toyota 5E Series Engines

#38208 from Scott Schick · Rule change · TB 26-02 (2026-02 Fastrack)

Summary

cars addedFP class adds Toyota 5E DOHC 1497cc engine, 1900 lbs minimum weight, 23mm SIR induction.

As printed in Fastrack

In FP Appendix N, add spec line for the Toyota 5E engine to the "Engines - TOYOTA" section:

A specification table follows in the original; it is not shown here.

FP Request for Toyota 4E Series Engines

#38209 from Scott Schick · Rule change · TB 26-02 (2026-02 Fastrack)

Summary

cars addedFP Toyota 4E DOHC 1331cc engine added to Appendix N with 1900 lbs minimum weight.

As printed in Fastrack

In FP Appendix N, add spec line for the Toyota 4E engine to the "Engines - TOYOTA" section:

A specification table follows in the original; it is not shown here.

FP Dual Carbs for the Fiat X1/9

#39593 from Daniel Snow · Rule change · TB 26-02 (2026-02 Fastrack)

Summary

unclearFP Fiat X1/9 gains dual carburetor options with 28mm side-draft alternates and revised valve/transmission specs.

As printed in Fastrack

In FP Spec Lines, change as follows:
Fiat X-1/9 & Bertone 1300:
"(1) Weber 32 DMTR or DATRA/100 w/32mm bores
(1) 40 DCNF w/32mm choke(s)
(2) auto-type side-draft w/28mm choke(s) on I.R. manifold
Orientation of the alternate carburetor is unrestricted. The alternate carb adapter may not be thicker than 1.25”. The adapter
may have a bore larger than the throttle bore of the approved alternate carburetor.
Valve Size: (I) 35.5/(1.40) (E) 31.3/(1.23)30.5/(1.20) (E) 1.23

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Trans. Speeds: 5"
Fiat X-1/9 & Bertone:
"Fuel Injection
(1) 34 DMTR, (1) 36 DCNF w/34mm choke(s), or (1) 40DCNF w/34mm choke(s)
(1) 36 or 40 DCNF w/34mm choke(s)
(2) auto-type side-draft w/28mm choke(s) on I.R. manifold
Orientation of the alternate carburetor is unrestricted. The alternate carb adapter may not be thicker than 1.25”. The adapter
may have a bore larger than the throttle bore of the approved alternate carburetor.
Valve Size: (I) 35.5/(1.40) (E) 33.0/(1.30)
Trans. Speeds: 5 or 4"

FP Correct Valve Sizes on FP Fiat x19 1300 and 1500

#39850 from DANIEL SNOW · Rule change · TB 26-03 (2026-03 Fastrack)

Summary

fasterFP Fiat X-1/9 1300 and 1500 intake valves increased to 36.3mm, exhaust valves corrected to 31.2mm and 33.3mm.

As printed in Fastrack

In FP Spec Lines, change Drivetrain Notes as follows:
Fiat X-1/9 & Bertone 1300:
Valve Size: "(I) 35.5/(1.40) (E) 31.3/(1.23) (I) 36.3/(1.43) (E) 31.2/(1.23)"
Fiat X-1/9 & Bertone:
Valve Size: "(I) 35.5/(1.40) (E) 33.0/(1.30) (I) 36.3/(1.43) (E) 33.3/(1.31)"

FP Dual Carburetor Adjustments

#39851 from DANIEL SNOW · Rule change · TB 26-03 (2026-03 Fastrack)

Summary

fasterFP Fiat X-1/9 & Bertone dual carburetors increase from 28mm to 30mm choke.

As printed in Fastrack

In FP Spec Lines, Fiat X-1/9 & Bertone, change Drivetrain Notes as follows:
"(2) auto-type side-draft w/28 30mm choke(s) on I.R. manifold"

GTL Remove GT3U from GCR as it is now in STU

#39862 from SCCA Staff · Rule change · TB 26-03 (2026-03 Fastrack)

Summary

cars addedGT3U class removed from GCR; GT3U cars now run in STU with 3.0" main frame and 2" front spoiler minimum ride height.

As printed in 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 at
current GT3 race weight plus 225lbs. All Gt3U cars shall run a DOT approved tire with a maximum section width of 245. GT3U
cars 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 the
total weight including the 225 lbs. TCR cars are ineligible for GT3/GT3U.
Table B: Alternate Vehicle and Engine Allowances Page 461:

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“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."

What the rules allowed changed as listed; this does not say what any particular car ran.