This track has been raced on 4 configurations (The Circuit, 2.57 mi; 19, 2.92 mi; 1.83 mi; 3.02 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.
6 laps are left out as timing errors (far too short to be a lap of this track). The rest of those sessions, sectors included, is used.
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
Pro Formula Mazda
FA
1
1:14.588Greg Labadie
1:14.588Greg Labadie
Swift 016
FA
1
1:35.792Greg Labadie
1:35.792Greg Labadie
1:37.275Greg Labadie
163.8Greg Labadie
26.713Greg Labadie
26.816Greg Labadie
41.822Greg Labadie
Glamdring
FV
1
1:44.706Mark Edwards
2:05.638Mark Edwards
2:04.892Mark Edwards
128.9Mark Edwards
28.863Mark Edwards
30.228Mark Edwards
45.501Mark Edwards
BMW M3
T1
1
1:46.465Ian Barberi
1:46.465Ian Barberi
1:47.434Ian Barberi
114.9Ian Barberi
28.992Ian Barberi
30.811Ian Barberi
46.263Ian Barberi
BMW M4 GT4
T1
1
1:47.084Drew Delmonico
1:47.084Drew Delmonico
1:47.467Drew Delmonico
161.4Drew Delmonico
29.150Drew Delmonico
30.850Drew Delmonico
46.316Drew Delmonico
Caracal C1
FV
1
1:51.773Marjorie Lundberg
2:04.579Marjorie Lundberg
2:02.255Marjorie Lundberg
122.3Marjorie Lundberg
30.462Marjorie Lundberg
32.246Marjorie Lundberg
49.106Marjorie Lundberg
Mazda RX-7
FP
1
1:55.440Michael Lewis
1:56.121Michael Lewis
1:55.440Michael Lewis
128.8Michael Lewis
31.255Michael Lewis
33.299Michael Lewis
50.847Michael Lewis
Nissan Sentra SE-R
FP
1
1:55.722Brian Linn
1:57.239Brian Linn
1:55.722Brian Linn
128.3Brian Linn
31.416Brian Linn
33.400Brian Linn
50.478Brian Linn
Volkswagen GTI
FP
1
1:56.016Tim Linerud
2:06.156Tim Linerud
93.4Tim Linerud
33.738Tim Linerud
35.656Tim Linerud
55.246Tim Linerud
Mazda MIata
FP
1
1:56.276Steven Powers
1:57.032Steven Powers
1:56.276Steven Powers
134.3Steven Powers
31.570Steven Powers
33.696Steven Powers
50.716Steven Powers
DART II
FV
1
1:58.898Mace Gjerman
2:04.535Mace Gjerman
1:58.898Mace Gjerman
121.9Mace Gjerman
26.541Mace Gjerman
35.132Mace Gjerman
55.126Mace Gjerman
Pontiac GTO
T1
1
1:59.123Ed Gless
1:59.760Ed Gless
1:59.123Ed Gless
120.7Ed Gless
32.383Ed Gless
34.587Ed Gless
51.370Ed Gless
Fiat X 1/9
FP
1
1:59.128Daniel Snow
2:00.398Daniel Snow
1:59.128Daniel Snow
137.8Daniel Snow
31.878Daniel Snow
34.053Daniel Snow
52.221Daniel Snow
Ford Mustang
T1
1
1:59.261Pratt Cole
1:59.261Pratt Cole
98.6Pratt Cole
32.624Pratt Cole
34.661Pratt Cole
51.577Pratt Cole
Protoform P4
FV
1
2:01.197Gavin Sweeney
2:02.354Gavin Sweeney
2:01.197Gavin Sweeney
124.6Gavin Sweeney
32.871Gavin Sweeney
34.423Gavin Sweeney
53.607Gavin Sweeney
LYNXX
FV
1
2:02.715Donald Manthe
2:06.541Donald Manthe
2:05.686Donald Manthe
117.9Donald Manthe
32.587Donald Manthe
35.402Donald Manthe
54.322Donald Manthe
Crusader
FV
1
2:04.723Blake Tatum
2:05.855Blake Tatum
2:04.723Blake Tatum
122.5Blake Tatum
34.149Blake Tatum
35.231Blake Tatum
55.343Blake Tatum
Mysterian M2
FV
1
2:06.510Ronnie Chuck
2:08.877Ronnie Chuck
2:06.510Ronnie Chuck
115.9Ronnie Chuck
33.255Ronnie Chuck
35.637Ronnie Chuck
56.197Ronnie Chuck
Porsche 914-4
FP
1
2:15.932Garey Raymond
2:21.274Garey Raymond
2:15.932Garey Raymond
84.8Garey Raymond
37.237Garey Raymond
39.091Garey Raymond
59.604Garey Raymond
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 2023 → Cal Club 2024 2023-02-24 to 2024-02-23
wordingT1 cars with aftermarket sequential transmissions get 10-inch max bellhousing; non-sequential cars gain 100 lbs weight break.
As printed in Fastrack
In GCR, Section 9.1.9.1.I.4., change as follows: "Aftermarket sequential transmissions are permitted. Cars with aftermarket sequential shift transmissions shall utilize a 1:1 (or greater/overdriven) ratio in top gear. Transmission location must be OEM. Maximum bellhousing length is 10 inches. Cars that don’t use an aftermarket sequential transmission may decrease their competition weight by 100 lbs."
wordingT1 GT4 weights clarified for nine cars, ranging from 3200 lbs Porsche 718 Cayman to 3575 lbs Aston Martin.
As printed in Fastrack
RM 23-04 – Touring 1 weights dated 3/21/2023 As an E&O to the February Fastrack, in T1-GT4 leave weights as follows: Aston Martin Vantage AMR GT4: 3575 Audi R8 GT4: 3550 BMW M4 GT4: 3500 Ford Mustang GT4: 3550 Maclaren 570S GT4: 3450 Mercedes AMG GT4: 3450
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Porsche 718 Cayman GT4 CS MR: 3200 Porsche 718 GT4 RS Clubsport: 3450 Toyota Supra GR GT4: 3350
FA E&O - Correct Pro Formula Mazda spec line dimensional equivalent
fasterFA Pro Formula Mazda maximum bodywork width behind front wheels increases to 51.97 inches.
As printed in Fastrack
In FA Table 2, Pro Formula Mazda spec line, change as follows: "The overall maximum width of the bodywork behind the front wheels shall not exceed 132cm (51.17 51.97 inches)."
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)"
slowerT1 Chevrolet Camaro Gen 5, Corvette C5 and C6: engine resleeve restricted to stock parameters only, no longer LS3 bore/stroke.
As printed in Fastrack
In T1 NEW Spec Lines, Chevrolet Camaro Gen 5 (10-15) Including SS, Z28, change Engine Notes as follows: 1130: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair or replacement." 1135: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement.May resleeve to stock parameters for engine repair or replacement." In T1 NEW Spec Lines, Chevrolet Corvette C5 (‘97-’04) – Includes: Z06, Coupe, Convertible, change Engine Notes as follows: 1132: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair or replacement."
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1134: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair or replacement." 1136: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair or replacement." 1138: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair or replacement." In T1 NEW Spec Lines, Chevrolet Corvette C6 (05-13) - Includes Z51, GrandSport, Z06, Z06 Carbon, change Engine Notes as follows: 1150: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair or replacement." 1160: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair or replacement." 1170: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair or replacement." 1180: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair or replacement." 1190: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair or replacement."
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)"
fasterT1 Corvette C5 gains approved aero parts: carbon rear spoiler, vented front splitter, side skirts, with 50 lb weight reduction allowed.
As printed in Fastrack
In T1 NEW Spec Lines, Chevrolet Corvette C5 (‘97-’04) – Includes: Z06, Coupe, Convertible, Spec Lines 1132-1138, add to Notes as follows: "Any option of OEM Bodywork parts may be used as basis for aero measurements. Rear spoiler max 5” Above bumper allowed. +50lbs. The following parts are permitted, with a 50lb decrease from base weight, in lieu of the aero options permitted in 9.1.9.1.B: (C7Carbon Rear- Spoiler CCC5 EX- RSB-GB, Vented Front Splitter CCC5-FS-GB, Side Skirts CCC5 SS-GB.)"
wordingT1 Dodge Viper ACR / SRT RT-10 and ACR/ACR-X spec lines 1350 and 1370 remove 12/23 expiration.
As printed in Fastrack
In T1 NEW Spec Lines, Dodge Viper ACR / SRT RT-10, change Spec Line Number as follows: "1350 *Spec line Expires 12/23*" In T1 NEW Spec Lines, Dodge Viper ACR/ACR-X, change Spec Line Number as follows: "1370 *Spec line Expires 12/23*"
cars addedT1 Porsche 997-1 GT3 Cup added at spec line 4210, minimum weight 3050 lbs.
As printed in Fastrack
In T1 Spec Lines, delete the Porsche 996 GT3 Cup car from the standard spec lines and classify "Homologated car" section as follows: T1 – Homologated Cars
A specification table follows in the original; it is not shown here.
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.
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”
unclearT1-GT4 batch adjustments: five cars lighter, two heavier, restrictors and ECU maps changed, five models now eligible for Runoffs.
As printed in Fastrack
In GCR, Section 9.1.9.1.A.T., change as follows: "Tires- Tires must conform to GCR section 9.3.TIRES and als o must conform to spec line requirements. DOT approved tires are permitted. Slicks conforming to the spec line are permitted." In Touring 1 - Homologated Cars Spec Lines, 4100- BMW M2 ClubSport Racing, change Must Conform To as follows: "Tires conforming to SRO TCX rules allowed. Must meet factory specs." In Touring 1 - Homologated Cars Spec Lines, 4120- Ford Mustang FP350S 2017, change as follows: Must Conform To: "Tires conforming to Trans Am SGT tire rules allowed Must meet factory specs." Chassis Notes: "VIN not required. Additional permitted allowances: DOT tires required. Other consumables are open, alternate
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driveshaft permitted, aftermarket wheels and fuel cell per Touring category rules permitted. Shocks conforming to T1 rules permitted. Alternative rear toe links permitted." In T1-GT4 Spec Lines, change Chassis Notes as follows: Aston Martin Vantage AMR GT4: "**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)** Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted." Audi R8 GT4: "**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)**Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted." BMW M4 GT4: "**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)**Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted." Chevrolet Camaro GT4-R: "**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)**Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted." Ford Mustang GT4: "**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)**Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted." Maclaren 570S GT4: "Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted." Mercedes AMG GT4: "Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted." Porsche 718 Cayman GT4 CS MR: "Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted." Porsche 718 GT4 RS Club-sport: "Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted." Toyota Supra GR GT4: "**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)**Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted." In T1-GT4 Spec Lines, change as follows: Aston Martin Vantage AMR GT4: Weight: “3575 3490” Performance Control: “SRO power level ECU Map 3 IMSA Map id 11” Chevrolet Camaro GT4-R: Weight: “3375 3435” Performance Control: “63 62mm” Ford Mustang GT4: Weight: “3550 3535” Performance Control: “63 71mm SRO compliant restrictor IMSA ECU Cal” Maclaren 570S GT4: Weight: “3450 3250” Performance Control: “SRO 2019 BOP ECU map SRO Rest 1” Mercedes AMG GT4: Weight: “3450 3470” Performance Control: “Power level 2 map 5” Porsche 718 Cayman GT4 CS MR: Weight: “3200 3250” Performance Control: “54 53.7mm” Toyota Supra GR GT4: Weight: “3350 3315”
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."
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."
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.”
removedT1 NEW class removes 23 spec lines including Acura NSX, Ferrari, Porsche 996, Nissan Z cars, and others; Porsche 997 spec line 1680 expiration removed.
As printed in Fastrack
In GCR Contents, change as follows: "9.1.9.1 TOURING (T1) CATEGORY NEW T1 NEW" In GCR, Section 9.1.9.1.Touring (T1) NEW Category Specifications, change as follows: "9.1.9.1.Touring (T1) NEW Category Specifications" In T1 NEW Spec Lines, change as follows: "9.1.9.1.A T1 NEW Spec Lines" "T1 NEW"
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In T1 NEW Spec Lines, delete the following Spec Lines in their entirety: "Acura NSX (Spec Line 1000) Acura NSX Turbo (Spec Line 1010) Acura NSX Turbo World Challenge (Spec Line 1020) Audi TTRS (GTS 2011 Spec) (Spec Line 1040) Dodge Viper ACR/ACR-X (Spec Line 1360) Ferrari 360 (Spec Line 1400) Ferrari 430 (Spec Line 1410) Ferrari 430 Challenge (Spec Line 1420) Mazda MX-5 (06-15) (Spec Line 1520 and 1530) Mazda RX-7 (Spec Line 1540) Nissan GTR (Spec Line 1550) Nissan 350/370Z (Spec Line 1560) Nissan 370Z Supercharged (Spec Line 1570) Nissan 350Z (Spec Line 1580) Nissan 350Z/370Z (Spec Line 1590) Porsche Cayman/S/GTS (05-15) (Spec Line 1600, 1610 and 1620) Porsche Cayman GTS (2011) (Spec Line 1630) Porsche 928 S4 Porsche 928 GTS-R (Spec Line 1640) Porsche 996 (Spec Line 1650) Porsche 996 TT OEM (Spec Line 1660) Subaru WRX, WRX STI (05-2020) (Spec Line 1700) Toyota Celica All-Trac (Spec Line 1710) Toyota Supra MK4 (Spec Line 1720)" In T1 NEW Spec Lines, Porsche 997, change Spec Line Number as follows: "1680 *Spec line Expires 12/23*"
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
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."
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."
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.
suspension & brakesFV ferrous rotor no longer required to be smooth; may have up to three pad cleaning grooves per side.
As printed in Fastrack
In FV, GCR section 9.1.1.C.4.D, change as follows: "Any ferrous alloy, unvented rotor may be used, but must have a maximum diameter of 11.75 in. and a minimum thickness of 0.20 in. The otherwise smooth rotor may not be cross-drilled and may have a maximum of three pad cleaning grooves per side."
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"
cars addedBMW M4 GT4 (G82) added to T1 GT4 at 3525 lbs minimum weight with Red power stick control.
As printed in Fastrack
In T1 GT4 Spec Lines, SL#4030, change as follows: Model: "BMW M4 GT4 (F82)" Performance Control: "Gold power stick Red power stick" In T1 GT4 Spec Lines, classify BMW M4 GT4 (G82) as follows:
A specification table follows in the original; it is not shown here.
fasterT1 GT4 Spec Line 4020 restrictor opens from 44mm to 45mm, minimum weight drops to 3400 lbs.
As printed in Fastrack
In T1 GT4 Spec Lines, Spec Line 4020, change as follows: Performance Control: Power level 2020, 44mm 45mm SRO compliant restrictor" Min. Weight with driver (LBS): "3550 3400"
wordingT1 Corvette may roll or flatten wheel opening lips for tire clearance; plastic fenders may remove lips if edge thickness matches basic material.
As printed in Fastrack
In GCR, Section 9.1.9.1.A.2,, add the following: "It is permitted to roll under or flatten any interior lip on the wheel opening for tire clearance. Cars with plastic/composite fenders may remove any interior wheel opening lip, but the resulting material edge shall be no thinner than the basic fender material thickness. Non-metallic inner fender liners may be removed. Vents may be added to fenders."
T1 Increased Bore Throttle Bodies for E46 M3 S54 Engine
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.”
unclearT1 E46 M3 Spec Line 1050 allows VAC Motorsports throttle body VAC-TB-S54 on 3.250L engine instead of Dinan.
As printed in Fastrack
In T1 Spec Lines, E46 M3 Spec Line # 1050, change Engine Notes as follows: "Dinan Throttle Body #D760-3400 VAC Motorsports #VAC-TB-S54 allowed on the 3.250L."
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
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."
unclearT1 Mustang Spec 1430 restrictor opens 60mm to 65mm; Spec 1460 weight rises to 3500 lbs, restrictor 70mm; Corvette 1190 restrictor opens 67mm to 70mm; BMW 1090 restrictor narrows 40mm to 35mm; BMW 1100 weight rises to 3350 lbs.
As printed in Fastrack
In T1 Spec Lines, change Weight, Restrictor Required and/or Notes as follows: Mustang - Spec Line 1430: Restrictor Required: "60mm 65mm - FPR" Mustang - Spec Line 1460: Weight: "3425 3500" Restrictor Required: "70mm - FPR" Corvette Spec Line 1190: Restrictor Required: "67mm 70mm - Flat Plate"
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BMW - Spec Line 1090: Required Restrictor: "(2) X 40mm 35mm diameter hole inlet restrictor plate required" Chassis Notes: "This spec line is set to expire 12/31/25." BMW - Spec Line 1100: Minimum Weight: "3150 3350”
wordingFA Formula Renault 2.0 (10-17) spec notes clarified: engine sealed, manual compliance required, tire choice unrestricted, no alterations except repairs.
As printed in Fastrack
In FA Table 2, Formula Renault 2.0 (10-17) spec line, change the notes as follows: "Engine must remain sealed. Car must comply with year-specific Formula Renault 2.0 manual, technical regulations, and all applicable bulletins found here:. Competitors must have copies of these materials in their possession and present them upon request. https://sites.google.com/a/renault-sport.com/formule-renault-2-0-en/bulletins-techniques/2017, https://sites.google.com/a/renault-sport.com/formule-renault-2-0-en/manuel-d-utilisateur/2017. The following exceptions apply: Tire choice is unrestricted. No part of the car may be altered from original Formula Renault 2.0 components, except for necessary repairs that do not affect performance."
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”."
fasterT1 Honda S2000 minimum weight reduced from 2950 lbs to 2900 lbs.
As printed in Fastrack
In T1 Spec Lines, Honda S2000, Spec Line 1530, change as follows: Minimum Weight: "2950 2900" Chassis Notes: "This spec line is set to expire as of 12/31/2025 if not represented in Majors competition in 2025."
wordingT1 BMW E46 M3 permits BMW #GS7D36SG aftermarket sequential transmission in SL# 1060 and 1070.
As printed in Fastrack
In T1 Spec Lines, BMW E46 M3, add to Chassis Notes the following: SL# 1060: "BMW #GS7D36SG transmission permitted as an aftermarket sequential option." SL# 1070: "BMW #GS7D36SG transmission permitted as an aftermarket sequential option."
fasterT1 Mustang Darkhorse R gets 315 front and rear tyres, loses 500 lbs minimum weight to 3600.
As printed in Fastrack
In T1 Spec Lines, Mustang Darkhorse R (Mustang Challenge) Spec Line- 4119, change as follows: Tire size: "305 315 (f) 315(r)" Performance Control: "TBD" Min. Weight with driver (LBS): "10.5 (f) 11 (r) 3600" Chassis Notes: "Must conform to Mustang Challenge Rules. Tires conforming to Mustang Challenge rules are permitted. **This car is not eligible for the Runoffs until it has competed in 3 Super Tour events.**"
FP Base Weight Adjustment for H-Production X1/9 Spec Lines
tyres & wheelsFA Ligier JS F3 front tires may be Hoosier 43363 240/580R13 MS, rear 43368 300/590R13 MS.
As printed in Fastrack
In FA Table 2, FR Americas Ligier JS F3 spec line, change the notes as follows: "Engine must be sealed in compliance with FR Americas or prior F3 Americas requirements. Car must comply with FR Americas rules, with the following exception: front tires may be Hoosier P/N 43363, size 240/580R13 in MS compound, and rear tires may be Hoosier P/N 43368, size 300/590R13 in MS compound. Competitors must have current copies of Formula Regional Americas Championship Sporting Regulations, Onroak Automotive Ligier JS F3 Information Manual, and HPD engine-related specifications and instructions in their possession and present them upon request."
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)."
FA Re-Consider USF Pro 2000 Car for Formula Atlantic Class
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”."
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"."
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)"
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."
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."
unclearFA MZR gains alternate Noor P/N 0088-8-00 intake manifold with AT Power runners as option to Elan or Mazda Speed Elite.
As printed in Fastrack
In FA, GCR section 9.1.1.2.d, modify as follows: "9. Intake manifold must be unmodified Elan DP02-60-003 or Mazda Speed equivalent Elite USF2015AT, 1.882” maximum bore diameter at throttle plates. Elan or Mazda Speed equivalent Elite intake manifold may be replaced with unmodified intake Noor P/N 0088-8-00 with intake runners AT Power P/N 13624." "10. Elan DP02-60-003 or Mazda Speed equivalent Elite USF2015AT intake manifold must use an A aluminum spacer must be used between the intake manifold and cylinder head castings; minimum spacer length is 2.200”."
fasterFA Formula 1000 motorcycle-based engine loses maximum compression ratio 14.5:1 limit.
As printed in Fastrack
In FA Table 2, Formula 1000 spec line, change the Engine as follows: "Motorcycle-based 4-cycle up to 1000cc, maximum compression ratio 14.5:1;. o Otherwise, current FA engine rules apply."
fasterFA Formula 1000 allows carbon fiber external panels, forward-facing gaps, raises floor to 125mm, adds eight 75×125mm rub blocks, expands diffuser to 110cm with 75mm radius transitions.
As printed in Fastrack
In FA Table 2, Formula 1000 spec line, change the Notes as follows: "Car must comply with December 2019 GCR Formula 1000 (FB) Preparation Rules, https://www.scca.com/downloads/48184- gcr-december-2019/download, except as modified by this spec line. The prohibition of using carbon fiber in any external panels or any panels licked by the airstream in Part 3.C of the December 2019 GCR F1000 (FB) Preparation Rules is removed, with the exception that the car's floor pan/undertray must comply with the requirements of Part 2.D of the December 2019 GCR F1000 (FB) Preparation Rules. The prohibition of forward-facing gaps or openings in the bodywork in Part 3.I of the December 2019 GCR F1000 (FB) Preparation Rules is removed. Part 3.D of the December 2019 GCR F1000 (FB) Preparation Rules is modified as follows: "Between the rear of the front tire and the front of the rear tire, no point on the lower surface of the car (the surface
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licked by the air stream) shall be more than 125mm above the plane determined by the reference area designated by the entrant and on a line perpendicular to that reference plane." Part 3.D of the December 2019 GCR F1000 (FB) Preparation Rules is also modified as follows: "A maximum of eight (8) rub blocks of maximum dimension 75mm by 125mm are allowed anywhere on the lower surface of the chassis and may extend below the reference plane." Part 3.E of the December 2019 GCR F1000 (FB) Preparation Rules is modified as follows: "The radius of transitions between the diffuser sides and adjacent horizontal structures may be up to 75mm. The width of the diffuser, as measured between its sides and above any radiused transitions, may not exceed 110cm in any lateral section." The CRB may require the use of Flat Plate Intake Restrictors at any time."
fasterFA Pro Mazda: lower intake manifold now unrestricted, throttle body raised to 80mm, wing height must not exceed 99cm, bodywork width must not exceed 132cm.
As printed in Fastrack
In FA Table 2, Pro Formula Mazda spec line, change the notes as follows: "All current FA rules apply to areas not covered by this spec line. Apex seals unrestricted. Street port or bridge port allowed. Unmodified OEM l Lower intake manifold required unrestricted, upper intake manifold unrestricted. Balance tube not permitted. Fuel injection only. Maximum 70 80mm T throttle B body. The maximum height of the wing and/or endplates shall must not exceed 99cm (38.98 inches). The overall maximum width of the bodywork behind the front wheels shall must not exceed 132cm (51.97 inches)."
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"
T1 LS1 into Corvette C6 Spec Line Request
#39716 from Danny Kellermeyerhttps://crbscca.com/secu · Rule change · TB 26-02 (2026-02 Fastrack)
In T1 Spec Lines, reinstate Spec Line # 1139, Chevrolet Corvette C6 (05-13) Includes Z51, GrandSport, Z06, Z06 Carbon, as follows: Max Displ: "LS1, LS6 OEM" Min Weight: "3200" Required Restrictor: "70mm"
What the rules allowed changed as listed; this does not say what any particular car ran.