BoP Lab / Buttonwillow Raceway Park
This track has been raced on 2 configurations (The Circuit, 2.57 mi; 19, 2.92 mi). Laps on different configurations are not comparable, so only events on the 2.57 mile layout are shown; switch above to see the others.
| Pos | Car | Driver | Class | # | Lap | Theoretical | Qual | Race | 5-lap stint | Consistency | Trap | S1 | S2 | S3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Chevrolet | Bob Blizzard | GTX | 9 | 1:49.569 B-P | 1:49.051 | 124.2 B-P | 29.869 B-P | 31.704 B-P | 47.478 B-P | ||||
| 2 | Ford Mustang GT4 | Rob Scholl | GTX | 22 | 1:49.596 B-R2 | 1:48.800 | 1:49.596 B-R2 | 1:50.003 B-R2 | +0.917 B-R2 | 116.4 B-R2 | 30.070 B-R2 | 31.820 B-R1 | 46.910 B-R2 | |
| 3 | Porsche 981 Cayman | Moze Cowper | GTX | 111 | 1:54.892 A-Q1 | 1:54.066 | 1:54.892 A-Q1 | 1:55.330 A-R2 | 1:55.654 A-R2 | +0.622 A-R2 | 146.0 A-R1 | 31.377 A-R1 | 32.983 A-R2 | 49.706 A-Q1 |
| 4 | Chevrolet Camero | Michael Arnheiter | GTX | 63 | 1:59.339 B-P | 1:56.800 | 124.8 B-P | 32.354 B-P | 33.705 B-P | 50.741 B-P |
One row per driver and car (a driver who changed cars has a row for each). Each cell is that driver's best in that car across the selected events, with the session it was set in. Best 5-lap stint is the mean of the driver's quickest five consecutive race laps, and consistency is how far their median race lap sat behind their best in that race (small is a driver who does it every lap); both come from the race with the best stint. The fastest in each column is purple, and a car whose best lap is more than 115% of the fastest in its class is greyed (marked ">115%" beside the driver) and left out of the colour scale. Click a column to sort, a row to highlight it. Theoretical lap is the sum of the best sectors, whichever laps they came from, and never slower than the best lap (where a car's fastest laps were recorded without sector times, its best lap is used). The 115% mark is about the car's best lap only: a car whose best lap is within 115% of the fastest in its class is never marked. Greyed sectors with no theoretical lap mean the sector times on file do not add up to a believable lap. Letters refer to the events above; Q is qualifying, R a race.
Sectors 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 |
|---|---|---|---|---|---|---|---|---|---|
| Chevrolet | GTX | 1 | 1:49.569Bob Blizzard | 124.2Bob Blizzard | 29.869Bob Blizzard | 31.704Bob Blizzard | 47.478Bob Blizzard | ||
| Ford Mustang GT4 | GTX | 1 | 1:49.596Rob Scholl | 1:49.596Rob Scholl | 116.4Rob Scholl | 30.070Rob Scholl | 31.820Rob Scholl | 46.910Rob Scholl | |
| Porsche 981 Cayman | GTX | 1 | 1:54.892Moze Cowper | 1:54.892Moze Cowper | 1:55.330Moze Cowper | 146.0Moze Cowper | 31.377Moze Cowper | 32.983Moze Cowper | 49.706Moze Cowper |
| Chevrolet Camero | GTX | 1 | 1:59.339Michael Arnheiter | 124.8Michael Arnheiter | 32.354Michael Arnheiter | 33.705Michael Arnheiter | 50.741Michael Arnheiter |
The best any driver of each car managed across the selected events, with who set it. Spellings and model years of the same car are grouped; click a row marked ▸ to see each version. Grouping is worked out from the names, so tell us if two cars are wrongly merged or split.
#31955 from Demetrio Bilbatua · Rule change · TB 22-03 (2022-03 Fastrack)
In GTX - FIA GT3, classify McLaren as follows:
GTX – FIA GT3
Make Homologation Model
Restrictor
(mm)
Weight (lbs) Notes
McLaren GT3-N/A GT3 720s 3000 lbs.
#31981 from Henry Hill · Rule change · TB 22-05 (2022-04 Fastrack)
In GTX Table 4, add a spec line as follows:
Table 4
Marque Model Engine Restrictor Min Weight (lbs) Notes
Wolf GB08 F1 Ford 52XS V8 NA 1725
Must comply with specifications found here:
https://www.scca.com/pages/
technical-forms-and-downloads
#32254 from Joe Aquilante · Rule change · TB 22-05 (2022-04 Fastrack)
In GTX Spec Lines, classify C7 Corvette Grand Sport as follows:
GTX - MISC
Make Homologation Model
Restrictor
(mm)
Weight
(lbs) Notes
C7 Corvette Grand Sport NA 3200 May remove “displacement on demand” valve train system
#32511 from Club Racing Board · Rule change · TB 22-05 (2022-04 Fastrack)
In GTX, GCR section 9.1.2.H.B, change as follows:
"10. IMSA GTP (1994-1998 1981-1993)
11. - IMSA Camel Lights (1985-1993)
12. - Le Mans Prototype 1 (1999-2013)
13. - Le Mans Prototype 2 (1999-Present)
14. - Le Mans Prototype 3 (2017-Present)
15. - Le Mans Prototype Challenge (2009-2018)
16. - World Sports Car (1994-1998)
11. 17. Vehicles listed in Table 4 below."
#32649 from SCCA Staff · Rule change · TB 22-06 (2022-06 Fastrack)
In GTX, classify the Porsche 992 GT3 Cup Car as follows:
GTX – MISC.
Make Model Engine
Restrictor
(mm)
#32799 from John Mills · Rule change · TB 22-09 (2022-09 Fastrack)
In GT, GCR Section 9.1.2.F.7.a.6:
"Glass and/or plastic headlights, front parking lights, front signal lights, lenses, and bulbs shall be removed. Headlight openings
shall be covered with a wire mesh screen or panel having the same contour as the original lens, mounted so that the headlight
bezel/rim remains in place, maintaining the standard appearance of the Production automobile. Side marker light assemblies
shall be removed and the resulting openings covered with a plate whose dimensions do not exceed those of the original parts;
side marker lights that are an integral part of the taillight assembly cannot be removed. Other lighting parts and operating
mechanisms may be removed. In the case of pop-up headlights, the entire assembly may be removed and the opening covered
with a screen or plate (as above, without the headlight bezel/rim requirement) which provides a stock appearance. It is not
permitted to relocate the standard headlight, parking light, signal light, etc., openings. Traditional GT cars only. Not allowed with
any "Spec Car, GT2-ST, or any other added non Traditional GT car. Taillights shall be in the original location and shall may be the
original style/type of taillight for the make, model, and year of car. A rear body panel having the same contour as the original
lens area and in the original location, may be fitted with a tail-light graphic of the original style/type frame/lens adhered to it. If
side marker lights are an integral part of the tail-light assembly they must be represented by the panel graphic. These
panel/graphics shall have a functioning red LED lamp assembly fitted through them on both sides of the car to serve as brake
lights. A 15-watt or equivalent rain light may be included with-in this LED assembly or may be a separately mounted single or
dual LED assembly."
#33315 from Butch Kummer · Rule change · TB 22-12 (2022-12 Fastrack)
In GCR Appendix L-TA2 rules, Addendum A, change A.2. as follows:
"The throttle body must be either a GM 90mm, electronic, part #1257 → 0790, or Edelbrock 90mm, mechanical, part 33869 or
#3870."
In GTA, GCR Section 9.1.2.G.3., change as follows:
"The throttle body must be either a GM 90mm, electronic, part #1257 → 0790, or Edelbrock 90mm, mechanical, part 33869 or
#3870."
#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.
#34043 from Alex Kirby · Rule change · TB 23-06 (2023-07 Fastrack)
In GTX Spec Lines, classify Ligier LMP3 as follows:
GTX - MISC
Make Model Engine Restrictor
(mm) Weight (lbs) Notes
Ligier LMP3 3.7L NA 2203
#34173 from Bob Monette · Rule change · TB 23-06 (2023-07 Fastrack)
In GTX Spec Lines, classify Ligier JSP4 as follows:
GTX - MISC
Make Model Engine Restrictor
(mm) Weight (lbs) Notes
#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.
#34956 from Demetrio Bilbatua · Rule change · TB 24-01 (2024-01 Fastrack)
In GTX Spec Lines, classify KTM as follows:
GTX – KTM
Make Homologation Model Restrictor
(mm) Weight (lbs) Notes
#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.”
#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"
#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.
#37972 from Paul Fairchild · Rule change · TB 25-05 (2025-05 Fastrack)
In GTX, Classify Porsche GT2 RS Clubsport, as follows:
GTX
Make Homologation Model Restrictor
(mm)
Weight
(lbs) Notes
Porsche GT2 RS Clubsport Must have factory specifications available at all race events
#38164 from Bart Wolf · Rule change · TB 25-06 (2025-06 Fastrack)
In GTX Spec Lines, GTX-MISC., Ligier, LMP3, 3.0L, Add to Notes the following:
"Allow any normally aspirated LS Chevrolet engine may be used."
#39470 from Peter Jankovskis · Rule change · TB 26-01 (2026-01 Fastrack)
In GTX-Misc. Table 4, classify RCR70 Coupe:
GTX – MISC. TABLE 4
Make Homologation Model Restrictor
A specification table follows in the original; it is not shown here.
What the rules allowed changed as listed; this does not say what any particular car ran.