BoP Lab / Buttonwillow Raceway Park
This track has been raced on 2 configurations (The Circuit, 2.57 mi; 2.92 mi). Laps on different configurations are not comparable, so only events on the 2.57 mile layout are shown; switch above to see the others.
| Pos | Car | Driver | Class | # | Lap | Theoretical | Qual | Race | 5-lap stint | Consistency | Trap | S1 | S2 | S3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Swift 016 | Greg Labadie | FA | 35 | 1:35.792 A-Q1 | 1:35.351 | 1:35.792 A-Q1 | 1:37.275 A-R1 | 1:37.692 A-R1 | +3.958 A-R1 | 163.8 A-R1 | 26.713 A-Q2 | 26.816 A-Q1 | 41.822 A-Q1 |
| 2 | SCCA Ent FE2 | Jon McClintock | FE2 | 23 | 1:39.265 A-Q2 | 1:39.265 | 1:39.265 A-Q2 | 1:40.253 A-R1 | 1:40.602 A-R1 | +1.377 A-R1 | 152.6 A-Q2 | 27.464 A-Q2 | 28.773 A-Q2 | 43.028 A-Q2 |
| 3 | SCCA Ent FE2 | Paul Marino | FE2 | 44 | 1:39.358 B-Q2 | 1:39.209 | 1:39.358 B-Q2 | 1:39.712 B-R1 | 1:40.188 B-R1 | +0.849 B-R1 | 156.6 A-Q1 | 27.234 B-Q2 | 28.582 B-R1 | 43.393 B-Q2 |
| 4 | SCCA Ent FE2 | Tom Hope | FE2 | 18 | 1:39.452 B-Q2 | 1:39.393 | 1:39.452 B-Q2 | 1:39.992 B-R1 | 1:40.186 B-R1 | +0.531 B-R1 | 125.6 B-Q1 | 27.375 B-Q2 | 28.661 B-Q2 | 43.357 B-Q1 |
| 5 | 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 |
| 6 | 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 |
| 7 | SCCA Ent FE2 | Tom Burt | FE2 | 45 | 1:40.774 B-Q1 | 1:40.569 | 1:40.774 B-Q1 | 1:40.955 B-R1 | 1:41.516 B-R1 | +0.989 B-R1 | 154.7 A-R1 | 27.836 B-R1 | 29.021 A-Q2 | 43.712 B-Q1 |
| 8 | SCCA Ent FE2 | Noah Hambayi | FE2 | 64 | 1:40.848 B-Q2 | 1:40.673 | 1:40.848 B-Q2 | 1:41.416 B-R2 | 1:41.703 B-R2 | +1.034 B-R2 | 142.4 B-P | 27.646 B-R2 | 28.966 B-Q2 | 44.061 B-P |
| 9 | 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 |
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 |
|---|---|---|---|---|---|---|---|---|---|
| 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 |
| SCCA Ent FE2 | FE2 | 5 | 1:39.265Jon McClintock | 1:39.265Jon McClintock | 1:39.712Paul Marino | 156.6Paul Marino | 27.234Paul Marino | 28.582Paul Marino | 43.028Jon McClintock |
| 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 |
| 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 |
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.
#35009 from Kristofer Olson · Rule change · TB 24-05 (2024-05 Fastrack)
slowerGT2-ST Acura NSX minimum weight raised to 3000 lbs, restrictor increased to 45mm TIR.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)
neutralGT1 Camaro 1993-2002 classification updated; 2010- model separately classified.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)
neutralGT1 Mazda 26B engine classified at 2850 lbs minimum weight.In GT1 Spec Lines, GT1 Approved Automobile List, Mazda, add the following:
"(Effective 11/1/2024) 26B engine = 2850 lbs."
#36254 from Michael McAleenan · Rule change · TB 24-12 (2024-12 Fastrack)
fasterGT1-ST Lamborghini Huracan GT3 Evo and 2019+ GT3 both shift to Unrestricted from 39mm and 52mm restrictors.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)
neutralGT1 LS1 Limited Prep engine added, 2600 lbs with driver, 383 cubic inches max, hydraulic roller cam, 750 cfm carb.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)
neutralTA2 rear wing height rule clarified: OEM aerodynamic devices exempt from peak-of-roof requirement.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)
unclearGT1-ST restrictor sizes removed for 13 cars; new specs not printed in letter.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"
#37658 from Club Racing Board · Rule change · TB 25-02 (2025-02 Fastrack)
neutralFA adds Tatuus F.3 T-318 or FR-19 as spec line car in Table 2 for Formula Regional European Championship.In FA Table 2, add the following:
Table 2 (Spec Line Cars)
Car Engine
Wheel
Width (in)
± .060
Aero Transmission Weight Notes
A specification table follows in the original; it is not shown here.
#37367 from Taz Harvey · Rule change · TB 25-03 (2025-03 Fastrack)
neutralAcura NSX GT3 EVO 22 classified in GT1 with 3500cc twin turbo V-6, 3100 lbs, max RPM 7500.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.
#37853 from Club Racing Board · Rule change · TB 25-03 (2025-03 Fastrack)
neutralFA Formula Renault 2.0 (10-17) spec notes clarified: engine sealed, manual compliance required, tire choice unrestricted, no alterations except repairs.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."
#37965 from Robey Clark · Rule change · TB 25-04 (2025-04 Fastrack)
neutralFE2 allows driver safety and comfort modifications for disabled drivers with SCCA approval, not transferable to other drivers.In FE2, GCR section 9.1.1.G.2.E, add the following:
"g. Driver Safety and Comfort modifications to seat and controls for drivers with disabilities may be made only by approval. These
modifications must be reported to SCCA Enterprises and noted in the car logbook. The modifications are approved only for the
noted driver with disabilities. If the car is used by or sold to another driver, it must be returned to the previous standard
configuration."
#38434 from Rocco Magni · Rule change · TB 25-07 (2025-07 Fastrack)
neutralFA Ligier JS F3 front tires may be Hoosier 43363 240/580R13 MS, rear 43368 300/590R13 MS.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."
#38902 from Robert Logsdon · Rule change · TB 25-09 (2025-09 Fastrack)
neutralGT1 LS Limited Prep Engine expands to include LS1, LS2, LS3, LS6 with 11:1 max compression.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."
#38978 from Robey Clark · Rule change · TB 25-10 (2025-10 Fastrack)
neutralFE and FE2 Enterprises must use bubble tail P/N WM138014; FE2 allows only this configuration.In FE, GCR section 9.1.1.G.2.F.k, change as follows:
"Enterprises bubble tail P/N: WM138014 is allowed for FE and is the only configuration for FE2."
#39101 from Club Racing Board · Rule change · TB 25-10 (2025-10 Fastrack)
neutralAcura NSX GT3 EVO 22 reclassified from GT1 to GT1-ST with 3100 lbs minimum weight.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
#38783 from Augie Pabst · Rule change · TB 25-09 (2025-09 Fastrack)
neutralFA class adds USF Pro 2000 car eligibility for Formula Atlantic racing.Effective 11/1/25 in FA Table 2, add the following:
#38223 from Ove Olsson · Rule change · TB 26-01 (2026-01 Fastrack)
unclearFA MZR gains alternate Noor P/N 0088-8-00 intake manifold with AT Power runners as option to Elan or Mazda Speed Elite.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 beused between the intake manifold and cylinder head castings; minimum spacer length is 2.200”."
#39302 from Reilly Harris · Rule change · TB 26-01 (2026-01 Fastrack)
fasterFA Formula 1000 motorcycle-based engine loses maximum compression ratio 14.5:1 limit.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."
#39311 from Taz Harvey · Rule change · TB 26-01 (2026-01 Fastrack)
fasterGT1-ST Acura NSX GT3 EVO 22 weight drops 100 lbs to 3000 lbs.In GT1-ST, Acura NSX GT3 EVO 22, change Weight as follows:
"3100 3000"
#39608 from Club Racing Board · Rule change · TB 26-01 (2026-01 Fastrack)
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.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
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."
#39322 from Erik Madsen · Rule change · TB 26-02 (2026-02 Fastrack)
neutralGT1 adds Porsche 992.1 GT3 Cup (2022-2025) with OEM ABS, traction control, RSR bumper, canards, and any exhaust allowed.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."
#39411 from Stephen Lamana · Rule change · TB 26-02 (2026-02 Fastrack)
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.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)."
What the rules allowed changed as listed; this does not say what any particular car ran.