BoP Lab / Buttonwillow Raceway Park

FV + P2 at Buttonwillow Raceway Park

No mapCal Club 2024, Cal Club 2023

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.

7 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	Glamdring	Mark Edwards	FV	74	1:44.706 B-P	1:44.592	2:05.638 A-Q1	2:04.892 A-R2	2:06.364 A-R2	+2.303 A-R2	128.9 B-P	28.863 B-P	30.228 B-P	45.501 B-P
4	Caracal C1	Marjorie Lundberg	FV	24, 70	1:51.773 B-P	1:51.773	2:04.579 A-Q2	2:02.255 B-R1	2:02.701 B-R1	+0.787 B-R1	122.3 A-Q2	30.462 B-P	32.246 B-P	49.106 B-P
5	DART II	Mace Gjerman	FV	89	1:58.898 A-R2	1:56.799	2:04.535 A-Q1	1:58.898 A-R2	2:07.262 A-R2	+8.538 A-R2	121.9 A-Q1	26.541 A-R2	35.132 A-Q1	55.126 A-Q2
6	Protoform P4	Gavin Sweeney >115%	FV	107	2:01.197 B-R1	2:00.901	2:02.354 B-Q2	2:01.197 B-R1	2:02.073 B-R2	+0.598 B-R2	124.6 A-Q1	32.871 B-P	34.423 B-R1	53.607 B-R1
7	LYNXX	Donald Manthe >115%	FV	40	2:02.715 B-P	2:02.311	2:06.541 A-Q1	2:05.686 A-R2	2:08.709 A-R2	+3.944 A-R2	117.9 A-Q1	32.587 B-P	35.402 A-R2	54.322 B-P
8	Crusader	Blake Tatum >115%	FV	3	2:04.723 A-R1	2:04.723	2:05.855 A-Q2	2:04.723 A-R1	2:06.212 A-R2	+1.581 A-R2	122.5 A-Q1	34.149 A-R1	35.231 A-R1	55.343 A-R1
9	Mysterian M2	Ronnie Chuck >115%	FV	50, 51	2:06.510 B-R2	2:05.089	2:08.877 B-Q2	2:06.510 B-R2	2:07.002 B-R2	+1.249 B-R2	115.9 A-R2	33.255 B-R2	35.637 B-R2	56.197 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

S1 SF → IM1 0.65 mi
S2 IM1 → IM2 0.75 mi
S3 IM2 → SF 1.17 mi
Spd In → Out 0.03 mi

Sectors are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.

By car

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
Glamdring	FV	1	1:44.706Mark Edwards	2:05.638Mark Edwards	2:04.892Mark Edwards	128.9Mark Edwards	28.863Mark Edwards	30.228Mark Edwards	45.501Mark Edwards
Caracal C1	FV	1	1:51.773Marjorie Lundberg	2:04.579Marjorie Lundberg	2:02.255Marjorie Lundberg	122.3Marjorie Lundberg	30.462Marjorie Lundberg	32.246Marjorie Lundberg	49.106Marjorie Lundberg
DART II	FV	1	1:58.898Mace Gjerman	2:04.535Mace Gjerman	1:58.898Mace Gjerman	121.9Mace Gjerman	26.541Mace Gjerman	35.132Mace Gjerman	55.126Mace Gjerman
Protoform P4	FV	1	2:01.197Gavin Sweeney	2:02.354Gavin Sweeney	2:01.197Gavin Sweeney	124.6Gavin Sweeney	32.871Gavin Sweeney	34.423Gavin Sweeney	53.607Gavin Sweeney
LYNXX	FV	1	2:02.715Donald Manthe	2:06.541Donald Manthe	2:05.686Donald Manthe	117.9Donald Manthe	32.587Donald Manthe	35.402Donald Manthe	54.322Donald Manthe
Crusader	FV	1	2:04.723Blake Tatum	2:05.855Blake Tatum	2:04.723Blake Tatum	122.5Blake Tatum	34.149Blake Tatum	35.231Blake Tatum	55.343Blake Tatum
Mysterian M2	FV	1	2:06.510Ronnie Chuck	2:08.877Ronnie Chuck	2:06.510Ronnie Chuck	115.9Ronnie Chuck	33.255Ronnie Chuck	35.637Ronnie Chuck	56.197Ronnie Chuck

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.

Rule changes between these events

Cal Club 2023 → Cal Club 2024 2023-02-24 to 2024-02-23

2023-04-01 P2 Remove redundant effective date language and update engine table

#34012 from Club Racing Board · Rule change · TB 23-04 (2023-04 Fastrack)

Summary

wordingP2 engine table wording updated; redundant effective date language removed.

As printed in Fastrack

In P2 Engine Table, Spec Line B.1, change as follows:

2023-04-01 P2 E&O - Correct dimensional equivalents

#34038 from Club Racing Board · Rule change · TB 23-04 (2023-04 Fastrack)

Summary

slowerP2 motorcycle engines: 2011+ Kawasaki restrictor reduced to 34mm, minimum weight raised to 1100 lbs; 2009+ other brands weight raised to 1100 lbs.

As printed in 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

Show 1 more lines

Line Engine Series

A specification table follows in the original; it is not shown here.

2023-05-01 P2 Clarify minimum side body height requirement

#34143 from Club Racing Board · Rule change · TB 23-05 (2023-05 Fastrack)

Summary

wordingP2 side body height requirement clarified: outermost surface between wheel openings must equal front axle centerline height.

As printed in 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."

2023-05-01 P2 Clarify closed cockpit single seat car allowance

#34144 from Club Racing Board · Rule change · TB 23-05 (2023-05 Fastrack)

Summary

wordingP2 closed cockpit single seat cars now prohibited unless specifically allowed in Table 1.

As printed in 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."

2023-12-01 FV FV Wheel Bearing Clarification

#35150 from Formula/Sports Racing Committee · Rule change · TB 23-12 (2023-12 Fastrack)

Summary

wordingFV front wheel bearings wording clarified in GCR 9.1.1.C.10.G.

As printed in Fastrack

In FV, GCR section 9.1.1.C.10.G, change as follows:
"Front W wheel bearings"

2023-12-01 P2 Correct Table 1 for Engine Date Range Specifications

#35182 from Formula/Sports Racing Committee · Rule change · TB 23-12 (2023-09 Fastrack)

Summary

wordingP2 Table 1 corrects engine date ranges and brand specifications for Stock and Modified engines across multiple car models.

As printed in 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.

2024-01-01 P2 E&O - Clarify B.1 modified engine range in AMAC spec lines

#35225 from Club Racing Board · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

wordingP2 AMAC modified engine range clarified to 2008 and older stock engines only, restrictor 38mm, weight 1025 lbs.

As printed in 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.

2024-01-01 P2 Replacement Engine Crankcase for 07/08 Suzuki GSX-R1000 Engines

#35340 from Michael A Reupert · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

unclearP2 Suzuki GSX-R1000 07/08 engine crankcase may swap to GSX-S1000 16/19 part #11301-04840.

As printed in 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."

Cal Club 2024 → Cal Club 2025 2024-02-23 to 2025-02-22

2024-05-01 P2 CN Spec ECU

#35835 from Bart Wolf · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

wordingP2 Spec ECU engine modifications clarified: oil system, ECU, and exhaust unrestricted only.

As printed in Fastrack

In P2 Engine Table, Spec Line E, change the notes as follows:
"No engine modifications except f~~or dry sump oil system, ECU mapping, and exhaust system~~ the following: oil system, ECU, and
exhaust are unrestricted."

2024-05-01 P2 E&O - Correct FIA Group CN spec line notes

#35900 from Club Racing Board · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

wordingP2 FIA Group CN spec notes clarified: Series changed to Challenge, documentation requirement moved to online link.

As printed in 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 their~~
~~possession and present them upon request~~ are available here: https://www.scca.com/pages/technical-forms-and-downloads."

2024-10-01 FV Disc Brakes

#36822 from Guy Bellingham · Rule change · TB 24-10 (2024-10 Fastrack)

Summary

suspension & brakesFV ferrous rotor no longer required to be smooth; may have up to three pad cleaning grooves per side.

As printed in Fastrack

In FV, GCR section 9.1.1.C.4.D, change as follows:
"Any ferrous alloy, unvented rotor may be used, but must have a maximum diameter of 11.75 in. and a minimum thickness of
0.20 in. The ~~otherwise smooth~~ rotor may not be cross-drilled and may have a maximum of three pad cleaning grooves per side."

2024-12-01 P2 2000 cc Pinto Engine Car Weight

#37187 from Marvin Hodges · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

slowerP2 2000cc Pinto engine car minimum weight set to 1335 lbs.

As printed in Fastrack

In P2 Engine Table, Line E Note 2, add the following:
"8. Minimum weight 1335 lbs."

Cal Club 2025 → Cal Club 2026 2025-02-22 to 2026-02-21

No changes on record for these classes.

What the rules allowed changed as listed; this does not say what any particular car ran.