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 | Stohr WF1 | Tim Day Jr | P2 | 8 | 1:09.928 D-Q2 | 1:09.928 | 1:09.928 D-Q2 | 1:39.758 A-R2 | 1:40.037 A-R2 | +1.010 A-R2 | 155.4 A-R2 | 26.848 A-Q1 | 28.010 A-Q1 | 42.420 A-Q1 |
| 2 | Stohr WF1 (2004) | Kevin Mitz | P2 | 13 | 1:12.573 D-Q2 | 1:12.573 D-Q2 | ||||||||
| 3 | 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 | ||||
| 4 | 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 | |
| 5 | 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 |
| 6 | 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 |
|---|---|---|---|---|---|---|---|---|---|
| Stohr WF1 | P2 | 2 | 1:09.928Tim Day Jr | 1:09.928Tim Day Jr | 1:39.758Tim Day Jr | 155.4Tim Day Jr | 26.848Tim Day Jr | 28.010Tim Day Jr | 42.420Tim Day Jr |
| Stohr WF1 | P2 | 1 | 1:09.928Tim Day Jr | 1:09.928Tim Day Jr | 1:39.758Tim Day Jr | 155.4Tim Day Jr | 26.848Tim Day Jr | 28.010Tim Day Jr | 42.420Tim Day Jr |
| Stohr WF1 (2004) | P2 | 1 | 1:12.573Kevin Mitz | 1:12.573Kevin Mitz | |||||
| Chevrolet | GTX | 2 | 1:49.569Bob Blizzard | 124.8Michael Arnheiter | 29.869Bob Blizzard | 31.704Bob Blizzard | 47.478Bob Blizzard | ||
| Chevrolet | GTX | 1 | 1:49.569Bob Blizzard | 124.2Bob Blizzard | 29.869Bob Blizzard | 31.704Bob Blizzard | 47.478Bob Blizzard | ||
| Chevrolet Camero | GTX | 1 | 1:59.339Michael Arnheiter | 124.8Michael Arnheiter | 32.354Michael Arnheiter | 33.705Michael Arnheiter | 50.741Michael Arnheiter | ||
| 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 |
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.
#34012 from Club Racing Board · Rule change · TB 23-04 (2023-04 Fastrack)
In P2 Engine Table, Spec Line B.1, change as follows:
#34038 from Club Racing Board · Rule change · TB 23-04 (2023-04 Fastrack)
In P2, GCR section 9.1.8.C.D.2, change as follows:
"Height: No part of the vehicle having special or significant aerodynamic function shall exceed a height of 115cm (45.275 inches)
above the ground with the car in normal racing trim, driver aboard."
In P2, GCR section 9.1.8.C.D.3, change as follows:
"However, no portion shall extend more than 10cm (3.937 inches) beyond a plane tangent to the outer face of the front and rear
wheels with tires."
P2 Engine Table
Spec
Line Engine Series
A specification table follows in the original; it is not shown here.
#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.
#34143 from Club Racing Board · Rule change · TB 23-05 (2023-05 Fastrack)
In P2, GCR section 9.1.8.C.D.6, change as follows:
"As viewed from the side, T the outermost surface of side pods body between the front and rear wheel openings and above the
floor must have a minimum height equal to the height of the front axle centerline."
#34144 from Club Racing Board · Rule change · TB 23-05 (2023-05 Fastrack)
In P2, GCR section 9.1.8.C.C, add a section as follows:
"4. Closed cockpit single seat cars are not permitted unless specifically allowed by a spec line in Table 1."
#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.
#35182 from Formula/Sports Racing Committee · Rule change · TB 23-12 (2023-09 Fastrack)
In P2 Table 1, change as follows:
P2 Table 1 (Spec Line Cars)
A specification table follows in the original; it is not shown here.
#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
#35225 from Club Racing Board · Rule change · TB 24-01 (2024-01 Fastrack)
In P2 Table 1, change as follows:
P2 Table 1 (Spec Line Cars)
A specification table follows in the original; it is not shown here.
#35340 from Michael A Reupert · Rule change · TB 24-01 (2024-01 Fastrack)
In P2 Engine Table, Spec Line B.1, add to notes as follows:
"No modifications allowed on engines manufactured after 2008 model year. 2007-2008 Suzuki GSX-R1000 crankcase part
#11300-21860 may be replaced with 2016-2019 Suzuki GSX-S1000 crankcase part #11301-04840."
#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"
#35835 from Bart Wolf · Rule change · TB 24-05 (2024-05 Fastrack)
In P2 Engine Table, Spec Line E, change the notes as follows:
"No engine modifications except for dry sump oil system, ECU mapping, and exhaust system the following: oil system, ECU, and
exhaust are unrestricted."
#35900 from Club Racing Board · Rule change · TB 24-05 (2024-05 Fastrack)
In P2 Table 1, FIA Group CN spec line, change the notes as follows:
"FIA Group CN homologated chassis, brake calipers and discs, hub carriers, and suspension components are required. V de
V European Proto Endurance Series Challenge permitted bodywork, rear diffuser, wing, wheels, and assisted
shifting are allowed. Car M must comply with all other P2 requirements. Competitors must have copies of FIA Group CN
Technical Regulations and V de V European Proto Endurance Series Challenge Sporting and Technical Regulations in theirpossession and present them upon request are available here: https://www.scca.com/pages/technical-forms-and-downloads."
#37187 from Marvin Hodges · Rule change · TB 24-12 (2024-12 Fastrack)
In P2 Engine Table, Line E Note 2, add the following:
"8. Minimum weight 1335 lbs."
#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.