BoP Lab / Buttonwillow Raceway Park

FV + P at Buttonwillow Raceway Park

No mapCal Club 2024, Cal Club 2023

This track has been raced on 4 configurations (The Circuit, 2.57 mi; 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.

Pos	Car	Driver	Class	#	Lap	Theoretical	Qual	Race	5-lap stint	Consistency	Trap	S1	S2	S3
1	Elan DP02/Mazda	Jim Devenport	P	23, 28	1:32.576 A-P	1:32.284	1:32.872 B-Q2	1:33.972 B-R2	1:35.195 B-R1	+1.742 B-R1	171.9 A-P	25.461 B-Q2	26.606 A-P	40.217 A-P
2	Dauntless Stohr	Johnnie Crean	P	3, 135	1:36.516 B-Q1	1:36.516	1:36.516 B-Q1	1:39.209 B-R1	1:40.027 B-R1	+1.943 B-R1	157.4 B-P	25.956 B-Q1	28.143 B-Q1	42.417 B-Q1
3	Dauntless-Stohr P07d	John Manfroy	P	08	1:37.287 A-R2	1:36.339	1:41.818 A-Q1	1:37.287 A-R2	1:39.027 A-R2	+2.902 A-R2	160.4 A-R2	26.696 A-R2	27.257 A-R2	42.386 A-R2
4	Stohr WF1	Kevin Mitz	P	13	1:38.716 A-Q2	1:38.667	1:38.716 A-Q2	1:39.638 A-R2	1:40.087 A-R2	+0.641 A-R2	155.4 A-Q1	26.934 A-Q2	28.397 A-Q2	43.336 A-Q2
5	Penton Norma M20FC	Joseph Moran	P	7	1:39.296 A-Q2	1:38.868	1:39.296 A-Q2	1:40.832 A-R1	1:42.328 A-R1	+3.544 A-R1	149.0 A-Q2	27.106 B-Q1	28.111 A-Q1	43.651 A-Q1
6	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
7	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
8	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
9	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
10	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
11	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
12	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
Elan DP02/Mazda	P	1	1:32.576Jim Devenport	1:32.872Jim Devenport	1:33.972Jim Devenport	171.9Jim Devenport	25.461Jim Devenport	26.606Jim Devenport	40.217Jim Devenport
Dauntless Stohr	P	2	1:36.516Johnnie Crean	1:36.516Johnnie Crean	1:37.287John Manfroy	160.4John Manfroy	25.956Johnnie Crean	27.257John Manfroy	42.386John Manfroy
Dauntless Stohr	P	1	1:36.516Johnnie Crean	1:36.516Johnnie Crean	1:39.209Johnnie Crean	157.4Johnnie Crean	25.956Johnnie Crean	28.143Johnnie Crean	42.417Johnnie Crean
Dauntless-Stohr P07d	P	1	1:37.287John Manfroy	1:41.818John Manfroy	1:37.287John Manfroy	160.4John Manfroy	26.696John Manfroy	27.257John Manfroy	42.386John Manfroy
Stohr WF1	P	1	1:38.716Kevin Mitz	1:38.716Kevin Mitz	1:39.638Kevin Mitz	155.4Kevin Mitz	26.934Kevin Mitz	28.397Kevin Mitz	43.336Kevin Mitz
Penton Norma M20FC	P	1	1:39.296Joseph Moran	1:39.296Joseph Moran	1:40.832Joseph Moran	149.0Joseph Moran	27.106Joseph Moran	28.111Joseph Moran	43.651Joseph Moran
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

2023-12-01 FV FV Wheel Bearing Clarification

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

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

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

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

2024-10-01 FV Disc Brakes

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

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

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."

2025-02-01 P Correct text in engine table notes

#37606 from Club Racing Board · Rule change · TB 25-02 (2025-02 Fastrack)

neutralPrototype Staudacher and unrestricted engine notes corrected for minimum weight wording.

In Prototype Engine Table, Spec Line B, change the notes as follows:
"Staudacher cars may run 950 lb ~~min. wt.~~ minimum weight with 38.5mm flat plate intake restrictor."
In Prototype Engine Table, Spec Line D, change the notes as follows:
"No restrictor required at 1150 lb ~~min. wt.~~ minimum weight."

2025-02-01 P Update Prototype class designation

#37653 from Club Racing Board · Rule change · TB 25-02 (2025-02 Fastrack)

neutralPrototype class renamed from P1 to P, affecting designation throughout rules with no performance changes.

In Categories and Classes, GCR section 9.1, change as follows:
"9.1.8. SPORTS RACING CATEGORY CLASSES
A Sports Racing (ASR) Regional Class
Prototype 1 (P1)"
In Homologation Requirements, GCR section 9.2.2, change as follows:
"All Formula, Sports Racing, ~~and~~ P1, and P2 cars must be constructed in strict accordance with the rules and regulations
contained in the current GCR unless specifically excepted."
In Non-Metallic Wheel/Chassis Construction, GCR section 9.3.37, change as follows:

Show 20 more lines

"Non-metallic wheel construction is prohibited. Non-metallic chassis construction is prohibited, except in ASR, P1, FS and FA."
In Appendix B, GCR section 1.4.2.G, change as follows:
"It is preferable not to combine GT1, AS, T1, T2, T3, and STU with P1, P2, SRF, FP, HP, or GTL."
In Appendix C, GCR section 2.6.G, change as follows:
"A 14 or 15 year-old must complete his first SCCA driver school in a car not classed in GT1, GT2, FA, F~~B, F~~ S, ITR, ASR, P1, P2, or
T1."
In Appendix E, section 1, change as follows:
"Depending on the length and banking of the oval course being used, it is recommended that Regions consider restricting the
faster classes (GT1, FA, and P 1) from competition at oval track events."
In Sports Racing Category, GCR section 9.1.8.1, change as follows:
"The SCCA Sports Racing Category shall be for automobiles which are designed and constructed for road racing competition,
offering provisions for a driver and passenger, or a driver alone (single-seater). They shall conform to the following
requirements. Sports Racers Cars except SRF & SRF3 homologated prior to 1-1-2014 are eligible to compete as P1 or P2 as long
as they meet applicable class rules,; no re-homologation is required."
"Single seat Formula car chassis (Ex.: FA, FC, FF, FV) fitted with enclosed bodies (as specified in these rules) may run in a Sports
Racing/Prototype Class (ASR, P 1, P2) provided they comply with the requirements of the Classification Specification and GCR
Section 9."
In Sports Racing Category, GCR section 9.1.8.2, change as follows:
"In an effort to control shock/damper technology and cost to a level reasonable for Road Racing, in ASR, P1, and P2, any fluid
dampers are allowed with the following restrictions:"

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

2025-05-01 P Add missing punctuation marks

#38150 from Club Racing Board · Rule change · TB 25-05 (2025-05 Fastrack)

neutralClass P adds clarification notes on restrictor requirements, throttle bodies, Mazda 12A engine spec, and P2 auto-based engine rules.

In P Engine Table, Spec Line D notes, add the following:
"No restrictor required at 1150 lbs. minimum weight."
In P Engine Table, Spec Line G notes, add the following:
"Group CN non-composite chassis with Honda K20A-FD2 may use unrestricted individual throttle bodies at 1500 lbs. minimum
weight."
In P Table 1, Beasley B2 spec line notes, add the following:
"Engine must be Mazda 12A rotary with 40.5mm venturi. Car must comply with all other Prototype requirements."
In P Table 1, P2 cars built to 2000cc auto-based specification spec line notes, add the following:

Show 3 more lines

"Car must comply with all other P2 rules applicable to cars using stock production-based four-cylinder automotive engines.
Note: Competitors are also free to modify their cars to comply with the general Prototype rules and Engine Table Spec Line H
instead."

2025-08-01 P RM 25-05 - Prototype Engine Table A, 2 Cycle Restrictor Change

#38929 from Club Racing Board · Rule change · TB 25-09 (2025-09 Fastrack)

slowerPrototype Engine Table A 2-cycle restrictor reduces from 40mm to 38mm venturi size.

Effective 8/1/25 in Prototype Engine Table, Spec Line A, change the restrictor as follows:
"~~40mm~~ 38mm Restricted Venturi Size"

2025-09-01 P 13B Rotary Engine Rules Change Request

#38856 from Jason Vinkemulder · Rule change · TB 25-09 (2025-09 Fastrack)

unclearP class 13B rotary engine restrictor changes to 40mm SIR fuel injection or 41.5mm venturi carburetor.

Effective 9/1/25 in Prototype Engine Table, Spec Line K, change the restrictor as follows:
"40mm SIR with fuel injection or 41.5mm venturi with carburetor"

2025-09-01 P Add Radical Cup series Radical SR3 spec line to Table 1

#38916 from Club Racing Board · Rule change · TB 25-09 (2025-09 Fastrack)

neutralPrototype class adds Radical SR3 spec line to Table 1 effective 9/1/25.

Effective 9/1/25 in Prototype Table 1 (Spec Line Cars), add the following:

2025-09-01 P Clarify spec line cars language

#38943 from Club Racing Board · Rule change · TB 25-09 (2025-09 Fastrack)

neutralPrototype P2 cars may now run P2 spec or modified Prototype spec in Prototype class; clarified language and added Radical Cup series table.

Effective 9/1/25, in Prototype, GCR section 9.1.8.B.K, change as follows:
"~~P2 cars may compete in either the Prototype class or the P2 class but must participate in the Prototype class to the extent~~
~~necessary to qualify for an invitation to the Runoffs in Prototype.~~ P2 cars may be modified to comply with the general Prototype
rules and Prototype Engine Table or may continue to run in P2 specification in the Prototype class as permitted in Table 1 below."
Table 1 (Spec Line Cars)

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

2026-01-01 P Request to Continue to Allow Carbon Brakes

#39476 from Jeffrey Lederman · Rule change · TB 26-01 (2026-01 Fastrack)

neutralPrototype carbon-carbon and carbon-ceramic brake rotors now permitted instead of prohibited.

In Prototype, GCR section 9.1.8.B.F.2, change as follows:
"Brake calipers may be ferrous or aluminum alloy. ~~Effective 1/1/2026, carbon-carbon and carbon-ceramic brake rotors are~~
~~prohibited and rotors must be ferrous.~~ Brake rotor material is unrestricted."

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