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BoP Lab / Buttonwillow Raceway Park

FE2 + P at Buttonwillow Raceway Park

No mapCal Club 2024, Cal Club 2023

Track map: sectors and speed trap

Track map with timing sectors and speed trap
Shown for: Cal Club 2026 (practice, qualifying, race) · Cal Club 2025 (practice, qualifying, race)
Class · click a class to switch, + to compare alongside
Track configuration
Events

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.

PosCarDriverClass#LapTheoreticalQualRace5-lap stintConsistencyTrapS1S2S3
1SCCA Ent FE (2007)Caleb ShraderFE2991:08.250 D-Q21:08.250 D-Q2
2Formula Enterprise (2023)Blake PigeonFE21081:12.402 D-Q21:12.402 D-Q2
3SCCA Ent FE2 (2007)John YeatmanFE2221:13.988 D-Q21:13.988 D-Q2
4SCCA Ent FE2 (2010)Thomas W BurtFE2451:14.003 D-Q21:14.003 D-Q2
5Elan DP02/MazdaJim DevenportP23, 281:32.576 A-P1:32.2841:32.872 B-Q21:33.972 B-R21:35.195 B-R1+1.742 B-R1171.9 A-P25.461 B-Q226.606 A-P40.217 A-P
6Dauntless StohrJohnnie CreanP3, 1351:36.516 B-Q11:36.5161:36.516 B-Q11:39.209 B-R11:40.027 B-R1+1.943 B-R1157.4 B-P25.956 B-Q128.143 B-Q142.417 B-Q1
7Dauntless-Stohr P07dJohn ManfroyP081:37.287 A-R21:36.3391:41.818 A-Q11:37.287 A-R21:39.027 A-R2+2.902 A-R2160.4 A-R226.696 A-R227.257 A-R242.386 A-R2
8Stohr WF1Kevin MitzP131:38.716 A-Q21:38.6671:38.716 A-Q21:39.638 A-R21:40.087 A-R2+0.641 A-R2155.4 A-Q126.934 A-Q228.397 A-Q243.336 A-Q2
9SCCA Ent FE2Jon McClintock >115%FE2231:39.265 A-Q21:39.2651:39.265 A-Q21:40.253 A-R11:40.602 A-R1+1.377 A-R1152.6 A-Q227.464 A-Q228.773 A-Q243.028 A-Q2
10Penton Norma M20FCJoseph MoranP71:39.296 A-Q21:38.8681:39.296 A-Q21:40.832 A-R11:42.328 A-R1+3.544 A-R1149.0 A-Q227.106 B-Q128.111 A-Q143.651 A-Q1
11SCCA Ent FE2Paul Marino >115%FE2441:39.358 B-Q21:39.2091:39.358 B-Q21:39.712 B-R11:40.188 B-R1+0.849 B-R1156.6 A-Q127.234 B-Q228.582 B-R143.393 B-Q2
12SCCA Ent FE2Tom Hope >115%FE2181:39.452 B-Q21:39.3931:39.452 B-Q21:39.992 B-R11:40.186 B-R1+0.531 B-R1125.6 B-Q127.375 B-Q228.661 B-Q243.357 B-Q1
13SCCA Ent FE2Tom Burt >115%FE2451:40.774 B-Q11:40.5691:40.774 B-Q11:40.955 B-R11:41.516 B-R1+0.989 B-R1154.7 A-R127.836 B-R129.021 A-Q243.712 B-Q1
14SCCA Ent FE2Noah Hambayi >115%FE2641:40.848 B-Q21:40.6731:40.848 B-Q21:41.416 B-R21:41.703 B-R2+1.034 B-R2142.4 B-P27.646 B-R228.966 B-Q244.061 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

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

CarClassDriversLapQualRaceTrapS1S2S3
SCCA Ent FE2FE281:08.250Caleb Shrader1:08.250Caleb Shrader1:39.712Paul Marino156.6Paul Marino27.234Paul Marino28.582Paul Marino43.028Jon McClintock
Formula EnterpriseFE211:12.402Blake Pigeon1:12.402Blake Pigeon
Elan DP02/MazdaP11:32.576Jim Devenport1:32.872Jim Devenport1:33.972Jim Devenport171.9Jim Devenport25.461Jim Devenport26.606Jim Devenport40.217Jim Devenport
Dauntless StohrP21:36.516Johnnie Crean1:36.516Johnnie Crean1:37.287John Manfroy160.4John Manfroy25.956Johnnie Crean27.257John Manfroy42.386John Manfroy
Stohr WF1P11:38.716Kevin Mitz1:38.716Kevin Mitz1:39.638Kevin Mitz155.4Kevin Mitz26.934Kevin Mitz28.397Kevin Mitz43.336Kevin Mitz
Penton Norma M20FCP11:39.296Joseph Moran1:39.296Joseph Moran1:40.832Joseph Moran149.0Joseph Moran27.106Joseph Moran28.111Joseph Moran43.651Joseph Moran

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

No changes on record for these classes.

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

P Correct text in engine table notes

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

Summary

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

As printed in Fastrack

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."

P Update Prototype class designation

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

Summary

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

As printed in Fastrack

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:

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"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, FB, 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

FE2 Driver Safety & Comfort

#37965 from Robey Clark · Rule change · TB 25-04 (2025-04 Fastrack)

Summary

wordingFE2 allows driver safety and comfort modifications for disabled drivers with SCCA approval, not transferable to other drivers.

As printed in Fastrack

In FE2, GCR section 9.1.1.G.2.E, add the following:
"g. Driver Safety and Comfort modifications to seat and controls for drivers with disabilities may be made only by approval. These
modifications must be reported to SCCA Enterprises and noted in the car logbook. The modifications are approved only for the
noted driver with disabilities. If the car is used by or sold to another driver, it must be returned to the previous standard
configuration."

P Add missing punctuation marks

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

Summary

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

As printed in Fastrack

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:

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"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."

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)

Summary

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

As printed in Fastrack

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

P 13B Rotary Engine Rules Change Request

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

Summary

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

As printed in Fastrack

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"

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)

Summary

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

As printed in Fastrack

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

P Clarify spec line cars language

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

Summary

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

As printed in Fastrack

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.

FE2 FE & FE2 Bubble Tail

#38978 from Robey Clark · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

wordingFE and FE2 Enterprises must use bubble tail P/N WM138014; FE2 allows only this configuration.

As printed in Fastrack

In FE, GCR section 9.1.1.G.2.F.k, change as follows:
"Enterprises bubble tail P/N: WM138014 is allowed for FE and is the only configuration for FE2."

P Request to Continue to Allow Carbon Brakes

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

Summary

suspension & brakesPrototype carbon-carbon and carbon-ceramic brake rotors now permitted instead of prohibited.

As printed in Fastrack

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.