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.
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.
| Pos | Car | Driver | Class | # | Lap | Theoretical | Qual | Race | 5-lap stint | Consistency | Trap | S1 | S2 | S3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Stohr WF1 (2004) | Kevin Mitz | P2 | 13 | 1:12.573 D-Q2 | 1:12.573 D-Q2 | ||||||||
| 2 | Stohr WF1 | Tim Day Jr >115% | P2 | 8 | 1:37.278 A-Q1 | 1:37.278 | 1:37.278 A-Q1 | 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 |
| 3 | Mazda RX-7 | Michael Lewis | GT3U | 32 | 1:55.650 B-R2 | 1:55.440 | 2:00.536 B-Q1 | 1:55.650 B-R2 | 1:56.657 B-R2 | +2.951 B-R2 | 129.8 B-P | 31.468 B-R2 | 33.670 B-R2 | 50.302 B-R2 |
| 4 | Mazda RX-7 | Justin Graham | GT3U | 50 | 2:03.073 B-R2 | 2:03.073 | 2:07.538 B-Q1 | 2:03.073 B-R2 | 2:07.183 B-R1 | +2.448 B-R1 | 101.0 B-R1 | 33.001 B-R2 | 35.220 B-R2 | 54.852 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 |
|---|---|---|---|---|---|---|---|---|---|
| Stohr WF1 | P2 | 2 | 1:12.573Kevin Mitz | 1:12.573Kevin Mitz | 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 | |||||
| Stohr WF1 | P2 | 1 | 1:37.278Tim Day Jr | 1:37.278Tim Day Jr | 1:39.758Tim Day Jr | 155.4Tim Day Jr | 26.848Tim Day Jr | 28.010Tim Day Jr | 42.420Tim Day Jr |
| Mazda RX-7 | GT3U | 2 | 1:55.650Michael Lewis | 2:00.536Michael Lewis | 1:55.650Michael Lewis | 129.8Michael Lewis | 31.468Michael Lewis | 33.670Michael Lewis | 50.302Michael 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.
#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.
#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."
#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.
#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."
#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."
#37919 from Club Racing Board · Rule change · TB 25-03 (2025-03 Fastrack)
In STU Spec Lines, Table C: STU-GT3U, change Minimum Weight as follows:
"150 250 pounds"
#37981 from Club Racing Board · Rule change · TB 25-04 (2025-04 Fastrack)
In STU-GT3U Spec Lines, Table C, add the following:
"Table C: STU-GT3U
Refer to section 9.1.2."
In GCR, Section 9.1.4.H.7, change as follows:
"All current STU cars, except TCR cars, may reduce their weight by 4% after all other modifiers"
#38268 from Club Racing Board · Rule change · TB 25-05 (2025-05 Fastrack)
In STU Spec Line, Table C: STU-GT3U, change as follows:
Minimum Weight: “Current GT3 race weight plus 250 225 pounds”
Notes: "DOT approved tire with maximum section width of 245. GT3 cars base wheel is a maximum of 15”x9”. 18”x9” wheelsallowd with a 3% weight addition. GT3 cars utilizing 15”x7” wheels are limited to a maximum section width of 225 with a 25pound weight reduction"
"All GT3U (Majors and Runoffs) cars using up to 15"x7" wheels limited to 225 section width tires shall run at current GT3 race
weight plus 225lbs. All Gt3U cars shall run a DOT approved tire with a maximum section width of 245. GT3U cars are allowed
optional 15"x9" wheels with a 1.5% weight addition or up to 18"x9" wheels with a 3.0% weight addition to the total weight
including the 225 lbs."
What the rules allowed changed as listed; this does not say what any particular car ran.