BoP Lab / Buttonwillow Raceway Park
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.
5 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.
| Pos | Car | Driver | Class | # | Lap | Theoretical | Qual | Race | 5-lap stint | Consistency | Trap | S1 | S2 | S3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Van Diemen RF05 (2005) | Peter West | FC | 21 | 1:11.935 D-Q2 | 1:11.935 D-Q2 | ||||||||
| 2 | Van Diemen RF99 | Troy Shooter | FC | 87 | 1:12.478 D-Q2 | 1:12.478 D-Q2 | ||||||||
| 3 | Van Diemen DP08 (2008) | Gary Peterson | FC | 9 | 1:14.576 D-Q2 | 1:14.576 D-Q2 | ||||||||
| 4 | Lamborghini Huracan GT3 Evo | Michael McAleenan | GT1 | 3 | 1:39.857 A-Q1 | 1:39.429 | 1:39.857 A-Q1 | 1:41.045 A-R2 | 1:42.375 A-R2 | +4.109 A-R2 | 167.6 A-Q1 | 27.368 A-Q1 | 29.135 A-Q1 | 42.926 A-Q1 |
| 5 | Jaguar XKR | Michael Lewis 2+ cars | GT1 | 12 | 1:39.901 A-Q1 | 1:39.901 | 1:39.901 A-Q1 | 1:41.635 A-R1 | 1:42.703 A-R1 | +2.651 A-R1 | 151.5 A-R1 | 27.895 A-Q1 | 28.765 A-Q1 | 43.241 A-Q1 |
| 6 | Van Diemen DP-08 | Robert Armington >115% | FC | 11 | 1:45.137 A-Q2 | 1:44.943 | 1:45.137 A-Q2 | 1:45.314 A-R2 | 1:46.641 A-R2 | +1.552 A-R2 | 143.5 A-Q2 | 29.106 A-Q2 | 30.109 A-R1 | 45.728 A-Q2 |
| 7 | Van Diemen RF96 | Shawn Sarbacker >115% | FC | 3 | 1:47.570 A-R2 | 1:47.205 | 1:47.741 A-Q2 | 1:47.570 A-R2 | 1:48.139 A-R2 | +2.423 A-R2 | 146.2 A-Q2 | 29.351 A-Q2 | 30.778 A-R2 | 47.076 A-R2 |
| 8 | Van Diemen RF97 | Bill Wallschlaeger >115% | FC | 0 | 1:47.993 A-R2 | 1:47.766 | 1:51.040 A-Q1 | 1:47.993 A-R2 | 1:48.553 A-R2 | +1.107 A-R2 | 147.5 A-R2 | 29.638 A-R2 | 30.895 A-R2 | 47.233 A-R2 |
| 9 | Van Diemen RF01 | Paul MacFarlane >115% | FC | 53 | 1:48.522 B-R1 | 1:48.481 | 1:50.067 B-Q1 | 1:48.522 B-R1 | 1:49.143 B-R1 | +2.405 B-R1 | 114.4 B-R2 | 29.050 B-R1 | 31.137 B-R1 | 48.294 B-R1 |
| 10 | Mazda RX-7 | Michael Lewis 2+ cars | GT1 | 32 | 1:53.007 B-R2 | 1:52.514 | 1:53.007 B-R2 | 1:56.277 B-R2 | +3.466 B-R2 | 110.9 B-R2 | 30.700 B-R2 | 32.429 B-R2 | 49.385 B-R2 | |
| 11 | Van Diemen RF (2000) | Greg Pizzo >115% | FC | 14 | 1:58.213 A-R2 | 1:57.333 | 2:10.106 A-Q2 | 1:58.213 A-R2 | 2:01.052 A-R2 | +4.196 A-R2 | 127.3 A-R2 | 32.045 A-R2 | 34.162 A-R2 | 51.126 A-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 are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.
| Car | Class | Drivers | Lap | Qual | Race | Trap | S1 | S2 | S3 |
|---|---|---|---|---|---|---|---|---|---|
| Van Diemen RF05 | FC | 1 | 1:11.935Peter West | 1:11.935Peter West | |||||
| Van Diemen RF99 | FC | 1 | 1:12.478Troy Shooter | 1:12.478Troy Shooter | |||||
| Van Diemen DP08 | FC | 1 | 1:14.576Gary Peterson | 1:14.576Gary Peterson | |||||
| Lamborghini Huracan GT3 Evo | GT1 | 1 | 1:39.857Michael McAleenan | 1:39.857Michael McAleenan | 1:41.045Michael McAleenan | 167.6Michael McAleenan | 27.368Michael McAleenan | 29.135Michael McAleenan | 42.926Michael McAleenan |
| Jaguar XKR | GT1 | 1 | 1:39.901Michael Lewis | 1:39.901Michael Lewis | 1:41.635Michael Lewis | 151.5Michael Lewis | 27.895Michael Lewis | 28.765Michael Lewis | 43.241Michael Lewis |
| Van Diemen RF01 | FC | 2 | 1:45.137Robert Armington | 1:45.137Robert Armington | 1:45.314Robert Armington | 143.5Robert Armington | 29.050Paul MacFarlane | 30.109Robert Armington | 45.728Robert Armington |
| Van Diemen DP-08 | FC | 1 | 1:45.137Robert Armington | 1:45.137Robert Armington | 1:45.314Robert Armington | 143.5Robert Armington | 29.106Robert Armington | 30.109Robert Armington | 45.728Robert Armington |
| Van Diemen RF01 | FC | 1 | 1:48.522Paul MacFarlane | 1:50.067Paul MacFarlane | 1:48.522Paul MacFarlane | 114.4Paul MacFarlane | 29.050Paul MacFarlane | 31.137Paul MacFarlane | 48.294Paul MacFarlane |
| Van Diemen RF96 | FC | 1 | 1:47.570Shawn Sarbacker | 1:47.741Shawn Sarbacker | 1:47.570Shawn Sarbacker | 146.2Shawn Sarbacker | 29.351Shawn Sarbacker | 30.778Shawn Sarbacker | 47.076Shawn Sarbacker |
| Van Diemen RF97 | FC | 1 | 1:47.993Bill Wallschlaeger | 1:51.040Bill Wallschlaeger | 1:47.993Bill Wallschlaeger | 147.5Bill Wallschlaeger | 29.638Bill Wallschlaeger | 30.895Bill Wallschlaeger | 47.233Bill Wallschlaeger |
| Mazda RX-7 | GT1 | 1 | 1:53.007Michael Lewis | 1:53.007Michael Lewis | 110.9Michael Lewis | 30.700Michael Lewis | 32.429Michael Lewis | 49.385Michael Lewis | |
| Van Diemen RF | FC | 1 | 1:58.213Greg Pizzo | 2:10.106Greg Pizzo | 1:58.213Greg Pizzo | 127.3Greg Pizzo | 32.045Greg Pizzo | 34.162Greg Pizzo | 51.126Greg Pizzo |
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.
#33804 from Gary D'Abate · Rule change · TB 23-04 (2023-04 Fastrack)
In GT1-ST Spec Lines, Mercedes Benz AMG GT3 (16-19), change Notes as follows:
"Car must be prepared to per its FIA GT3 homologation. except as specified differently within the GT1 class rules."
#33784 from James Rogersn · Rule change · TB 23-05 (2023-05 Fastrack)
In GT Spec Lines, GT1 Cars - Fields Cardinal, classify Fields Cardinal V8 as follows:
GT1 Cars – Fields Cardinal
Model Years Body Style Drive-
line
Wheel-
base (in)
Notes
Fields Cardinal V8 2023 2 Dr. RWD 92.0 Roll Cage MUST be modified to comply with
GCR Section 9.4.
In GT Spec Lines, GT1Engines - classify Ford V8 as follows:
GT1 Engines - Ford
Engine
Family
Engine Type Bore x
A specification table follows in the original; it is not shown here.
#34329 from Formula/Sports Racing Committee · Rule change · TB 23-06 (2023-06 Fastrack)
RM 23-07, USF2000 Van Diemen with Mazda MZR LF-DE 2.0L in FC, GCR section 9.1.1.B.1, add a new section and re-letter the
following sections accordingly:
"c. The USF2000 tube frame Van Diemen car powered by the Mazda MZR LF-DE 2 liter engine is added as a "spec line" car in
Formula Continental. Additional "spec line" cars are disfavored, and Balance of Performance (BoP) adjustments to keep "spec
line" cars competitive with cars that meet the class formula are likewise disfavored."
In FC, GCR section 9.1.1.B.11, add the following:
"The only permitted engines are:
a. The Ford 2 liter single overhead camshaft "NE" series engine or the 1971-74 Pinto/Capri 2 liter single overhead camshaft
engine. The specifications are contained in B.15.
b. The Ford Zetec ZX3 2 liter dual overhead camshaft engine. The specifications are contained in B.16.
c. The Mazda MZR LF-DE 2 liter for use only in USF2000 cars, as described in the Spec Line Cars Table below."
In FC, GCR section 9.1.1.B, add the following:
In FX, GCR section 9.1.1.J.B, change as follows and renumber the remaining lines accordingly:
"3. USF2000 (tube frame) – Shall comply with FRP F2000 Technical Specifications (2018)4. Pro Formula F2000 (tube frame) – Engine must be prepared to current FC rules."
In FX Table 1, remove the USF2000 Tube Frame and Pro Formula F2000 Tube Frame spec lines in their entirety.
Spec Line Cars Table
A specification table follows in the original; it is not shown here.
#34274 from SCCA Staff · Rule change · TB 23-06 (2023-05 Fastrack)
In FC, GCR section 9.1.1.B.10.h, change as follows:
"FC shall be is permitted a maximum of four (4) dry tires and four (4) wet tires for all Regional, Major, and Super Tour events;
eight (8) dry tires and eight (8) wet tires are permitted for the Runoffs. This rule shall be is effective beginning with the first (1st)
qualifying session of the event. Marked tires are not required for testing or practice. It is the competitor's responsibility to
ensure that the tires are declared, marked, and logged by Tech in advance of the tire(s) being used in a qualifying session or
race. Failure to participate on marked tires will result in a penalty.1. Use of an undeclared tire shall automatically result in all times being disallowed in that session or finishing position in thatrace.
2. If a tire is damaged during a qualifying session or a race, the competitor may replace the damaged tire with a used tire upon
approval by the Chief Steward without loss of time or finishing position. Second or subsequent damaged tires may similarly be
replaced upon approval by the Chief Steward, however but such shall will result in the loss of grid position in the subsequent race
or session; the competitor shall will start at the back of the grid. Replacement of a damaged tire with a new tire upon approval by
the Chief Steward will result in loss of grid position in the subsequent race or session."
#34453 from David Gomberg · Rule change · TB 23-12 (2023-12 Fastrack)
from the current (or before) Table of Contents (TOC), to what is shown in the after TOC.
GTL spec lines will now be contiguous with GT2 and 3 spec lines.
GTA category and spec lines will be moved and renumbered behind GTL. GTA Section will not change but page numbers will, (as
shown in Red italics).
9.1.2.F. GT-2, 3, LITE Category Specifications 314
GT2 Cars 327
GT2/ST 341
GT3 Cars 348
GTL Cars 364
GTA Cars 377
P2 Engine Table B.1
2010 and older
Stock Kawasaki
38.5mm
minimum width 52 inches. AMAC-AM5:
minimum width 54 inches.
P2 Engine Table B.1
2008 and older
Stock Engine Suzuki,
Yamaha,
Honda, BMW
38.5mm
P2 Engine Table B.2 Not required
P2 Engine Table B.3 38.5mm
Modified Engine
950 lbs.
1005cc max
P2 Engine Table B.1 37mm
P2 Engine Table B.2 Not required
P2 Engine Table B.3 39mm
Stock Engine
1050 lbs.
#34890 from Club Racing Board · Rule change · TB 23-10 (2023-09 Fastrack)
In Cars and Equipment, GCR section 9.3.33.B.2, add the following:
"(Effective 1/1/2024) A red taillight meeting FIA Standard 8874-2019, Technical List No. 76, is required on all Formula (open
wheel) and Sports Racing cars."
In Appendix F. Technical Glossary, Minimum Weight, change as follows:
"Minimum Weight: – Weight specified with driver, exactly as they come off the race circuit, at the conclusion of any race or
qualifying session."
In FA Table 1, Spec Line E notes, add the following:
"Any BD series iron or alloy cylinder block and alternate crankshaft permitted."
In FC, GCR section 9.1.1.B.11.c, change as follows:
"The Mazda MZR LF-DE 2 liter for use only in USF2000 cars, as described in the Spec Line Cars Table below.""
In F600, GCR section 9.1.1.D.14, add the following:
"Rotax Model 494, Model 493, and Model 593 must use a single expansion chamber and must be equipped with a pull starter;
an electric starter may be added."
In P1, GCR section 9.1.8.B.J.2, add the following:
"Where a flat plate intake restrictor, restricted venturi, or Single Inlet Restrictor (SIR) is required, all intake air for each cylinder
or the entire fuel-air mixture, if prepared before this point, must pass through the restrictor."
#34929 from Michael McAleenan · Rule change · TB 24-01 (2024-01 Fastrack)
In GT1-ST Spec Lines, classify Lamborghini Huracan GT3 EVO(1) (2018-) as follows:
GT1-ST Maximum Displacement Minimum Weight Restrictor Notes
Lamborghini Huracan
GT3 EVO(1)
(2018-)
5204 3000 2 X39mm Per FIA Homologation
GT3-040
In GT1-ST Spec Lines, classify Lamborghini Huracan GT3 (2019-) as follows:
GT1-ST Maximum Displacement Minimum Weight Restrictor Notes
Lamborghini
Huracan GT3
2019-
5204 3100 52mm Per FIA Homologation
GT3-040
#35040 from Pater Mumford · Rule change · TB 24-01 (2024-01 Fastrack)
In GCR, Section 9.1.2.D.1.e.3., add at the end of section add the follows:
"Trick Flow Specialties Ultra 18 Degree GM Cylinder Head assembly Part #TFS-3181T001-CO1 is allowed."
#35261 from Butch Kummer · Rule change · TB 24-02 (2024-01 Fastrack)
In GCR Section 9.1.2.G (GTA Category Specifications), change as follows:
“9.1.2.G.III.I
The single-plane rear spoiler must be mounted at an angel angle from 50 to 75 degrees (perpendicular to the ground
being 90 degrees) and may not extend beyond the rear bumper when viewed from directly above the rear
bumper. Spoilers must be a minimum of .063 aluminum or Lexan and may vary in overall height to match the contours
of the bodywork. The rear spoiler dimensions shall not exceed 59.0 inches wide by 5.0 inches in height, (measured on
the material surface) , or 295.0 square inches total surface area. Braces to prevent spoiler deflection are allowed, but
may serve no other purpose.”
#35437 from Grand Touring Committee · Rule change · TB 24-02 (2024-01 Fastrack)
In GCR, Section 9.1.2.F.7.5.E. change as follows:
“Direct Injection is not permitted only if it came OE and must be installed using only OE high pressure pump(s), hard and
soft hoses and injectors.”
#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.”
#35481 from Steve Jenks · Rule change · TB 24-04 (2024-04 Fastrack)
In FC Table FC Charts, add the following:
In FC, GCR section 9.1.1.B.1.c, change as follows:
"The USF2000 tube frame Van Diemen car powered by the Mazda MZR LF-DE 2 liter engine and the F2000 Metrik ZF2 car
equipped with 4-piston calipers is are added as a "spec line" cars in Formula Continental. Additional "spec line" cars are
disfavored, and Balance of Performance (BoP) adjustments to keep "spec line" cars competitive with cars that meet the class
formula are likewise disfavored."
FC Charts
Car Engine Wheel Width
(in) ± .060 Aero Transmission Weight Notes
A specification table follows in the original; it is not shown here.
#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"
#35652 from John Bodnar · Rule change · TB 24-05 (2024-05 Fastrack)
In GCR, Section 9.1.2.E.1.b.3., change as follows:
"Camaro (1993-2002)"
#36230 from Wayne Graham · Rule change · TB 24-09 (2024-09 Fastrack)
In GT1 Spec Lines, GT1 Approved Automobile List, Mazda, add the following:
"(Effective 11/1/2024) 26B engine = 2850 lbs."
#36533 from SCCA Staff · Rule change · TB 24-09 (2024-09 Fastrack)
In FC, GCR section 9.1.1.B.10.h, change as follows:
"(Effective 11/1/2024) FC is permitted a maximum of four (4) dry tires and four (4) wet tires for all Regional, Major, and Super
Tour events; eight (8) dry tires and eight (8) wet tires are permitted for the Runoffs. This is effective beginning with the first (1st)
qualifying session of the event. Marked tires are not required for The tire limit does not apply to testing or practice. It is the
competitor's responsibility to ensure that the tires are declared, marked, and logged by Tech immediately upon conclusion of the
first qualifying session, as provided in the event supplemental regulations, or per the instructions of the Race Director or Chief
Steward. in advance of the tire(s) being used in a qualifying session or race. Failure to participate on marked Use of tires in
excess of the number allowed will result in a penalty. Failure to participate on declared/marked/logged tires after the time
prescribed for the same may result in a penalty. If a tire is damaged during a qualifying session or a race, the competitor may
replace the damaged tire with a used tire upon approval by the Race Director or Chief Steward without loss of time or finishing
position. Second or subsequent damaged tires may similarly be replaced upon approval by the Race Director or Chief Steward,
but such will result in the loss of grid position in the subsequent race or session; the competitor will start at the back of the grid.
Replacement of a damaged tire with a new tire upon approval by the Race Director or Chief Steward will result in loss of grid
position in the subsequent race or session; the competitor will start at the back of the grid."
#36651 from Robert Wright · Rule change · TB 24-11 (2024-11 Fastrack)
In FF, GCR section 9.1.1.B.20.A.3, change as follows:
"Cars running with a sequentially shifted gear box shall must add 25 10 lbs. to minimum weight."
In FC, GCR section 9.1.1.B.20.B.4, change as follows:
"Cars running with a sequentially shifted gear box shall must add 25 10 lbs. to minimum weight."
#36254 from Michael McAleenan · Rule change · TB 24-12 (2024-12 Fastrack)
In GT1-ST Spec Lines, Lamborghini Huracan GT3 EVO(1) (2018-), change Restrictor as follows:
"2 X 39mmUnrestricted"
In GT1-ST Spec Lines, Lamborghini Huracan GT3 (2019-), change Restrictor as follows:
"52mm Unrestricted"
#37045 from Robert Logsdon · Rule change · TB 25-01 (2025-01 Fastrack)
In GCR, Section 9.1.2. GT1 Spec Lines, GT1 Approved Automobile List, LS1 V8 engine allowed with stock intake, add the
following:
"LS1 Limited Prep GT1 motor
2600 # with driver
Blocks : GM castings or aftermarket, no lightening, Max volume 383 cubic inches
Cylinder Heads: GM LS castings or aftermarket, stock valve angle, intake and exhaust ports must be in stock location, porting
and polishing allowed
Valves: No titanium valves, must be stock size for head part number
Rockers: Factory 1.7 rockers only, aftermarket trunion mod allowed
Pushrods: Free
Intake manifold: stock EFI for variant used or GM 525 carb intake or Edelbrock carb variants ie: Performer RPM, Victor, Victor Jr.
or similar.
Camshaft: Hydraulic roller only, standard journal size, lift and duration free
Timing chain: single or double roller type only
water pump: stock or aftermarket in stock location
Harmonic dampener: SFI approved,
Pistons: Factory or aftermarket flat top pistons only, valve reliefs allowed, coatings allowed
Crankshaft: Factory or forged steel aftermarket, 50 lb min. weight
Rods: GM stock or aftermarket forged steel
Carburetor: one 4150 type 750 cfm max"
#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.
#37481 from Grand Touring Committee · Rule change · TB 25-01 (2025-01 Fastrack)
In GT1-ST SPEC LINES, change as follows:
Aston Martin Vantage GT3 (2012) :
Restrictor: "2 x 41.5mm"
Audi R8 LMS Ultra GT3 (10-14) :
Restrictor: "2 x 49mm"
BMW Z4 GT3 (10-13):
Restrictor: "70mm"
Chevrolet Corvette C8 (20-):
Restrictor: "71mm- Flat Plate"
Dodge Viper GT3R (2012-):
Restrictor: "2 x 40mm"
Dodge Viper, incl Comp Coupe, ACR/ACR-X Max Displacement 8400, Weight 3200:
Restrictor: "68mm flat plate"
Ferrari 458 GT3 (2011-):
Restrictor: "2 x 43mm"
Lamborghini Gallardo GT3 (2013):
Restrictor: "2 x 47mm"
Lamborghini Huracan GT3 EVO(1) (2018-):
Restrictor: "2 X39mm"
McLaren MP12C GT3 (2013-):
Restrictor: "2 x 36mm 1.50 bar"
Lamborghini Huracan GT3 (2019-):
Restrictor: "2 x 40 mm"
McLaren MP12C GT3 (2013-):
Restrictor: "2 x 40 mm"
Mercedes Benz SLS GT3 (2011-):
Restrictor: "2 x 36 mm"
Porsche 991 GT3-R (2016):
Restrictor: "(2) 35 mm"
Porsche 997 GT3 R (2013-):
Restrictor: "65mm"
#37367 from Taz Harvey · Rule change · TB 25-03 (2025-03 Fastrack)
In GT1 Spec Lines, GT 1 Cars - ACURA, classify Acura NSX GT3 EVO 22 as follows:
GT 1 Cars - ACURA
Model Years Body Style Drive-
line
Wheel-
base (in)
Notes
Acura NSX GT3 EVO 22 N/A 2dr RWD 103.5 Ground Clearance 50mm
In GT1 Spec Lines, GT 1 Engines - ACURA, classify Crossflow V-6 as follows:
GT 1 Engines - ACURA
Engine
Family
Engine Type Bore x
A specification table follows in the original; it is not shown here.
#38902 from Robert Logsdon · Rule change · TB 25-09 (2025-09 Fastrack)
In GCR, Section 9.1.2. GT1 Spec Lines, GT1 Approved Automobile List, LS1 engine allowed with stock intake, make the following
change:
"LS1 Limited Prep GT1 Motor Chevy LS Limited Prep Engine including LS1, LS2, LS3 and LS6."
"Pistons: Factory or aftermarket flat top pistons only, valve reliefs allowed, coatings allowed. Maximum compression ratio
11:1."
#39101 from Club Racing Board · Rule change · TB 25-10 (2025-10 Fastrack)
IN GT1 reclassify the Acura NSX GT3 EVO 22 to GT1-ST as follows:
GT1 Approved Automobile List
Make/Model WheelbaseACURANSX GT3 EVO 22 103.5”DOHC 4v per cylinder EFI Twin Turbo Crossflow V-6 Displacement 3500cc Bore and Stroke 91x90MAX RPM 7500 MAX BOOST 2.1 bar Weight 3100 lbs
GT1-ST Maximum
Displacement
Minimum
Weight Restrictor Notes
ACURA NSX GT3 EVO 22 3500cc 3100 Per FIA Homologation GT3-047
#38927 from Rock Beauchamp · Rule change · TB 26-01 (2026-01 Fastrack)
In FC Charts table, USF2000 Tube Frame spec line, add the following to the Notes:
"Cars originally built with the Hewland LD200 4-speed H-pattern may use that transmission as an alternative to the Hewland JL-
200 5-speed sequential transmission."
#39311 from Taz Harvey · Rule change · TB 26-01 (2026-01 Fastrack)
In GT1-ST, Acura NSX GT3 EVO 22, change Weight as follows:
"3100 3000"
#39612 from Club Racing Board · Rule change · TB 26-01 (2026-01 Fastrack)
In FC Charts table, F2000 Metrik ZF2 spec line, change the Weight as follows:
"1240 1220"
#39322 from Erik Madsen · Rule change · TB 26-02 (2026-02 Fastrack)
In 9.1.2. GT1 Spec Lines, add the following:
"992.1 GT3 Cup (2022-2025)
OEM ABS and Traction Control allowed. Porsche OEM RSR bumper and canards allowed. Any exhaust system may be utilized."
What the rules allowed changed as listed; this does not say what any particular car ran.