BoP Lab / Buttonwillow Raceway Park
FC vs P pace at Buttonwillow Raceway Park
Quickest here: FC 1:11.935 Peter West, Cal Club 2023 qualifying · P 1:32.872 Jim Devenport, Cal Club 2025 qualifying
| Event | FC | P | ||||||||
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| Qual best | Race best | Trap | Qual best | Race best | Trap | vs FC | % of FC | |||
| Cal Club 2026 CALCL262026-02-21 | 1:45.137Robert Armington · fastest of 4 · top 4 within 25.0s-4.930s (-4.48%) | 1:45.314Robert Armington · fastest of 4 · top 4 within 12.9s-3.208s (-2.96%) | 147.5Bill Wallschlaeger+33.0 mph (+28.9%) | 1:38.716Kevin Mitz · fastest of 3 · top 3 within 3.1s+5.844s (+6.29%) | 1:37.287John Manfroy · fastest of 3 · top 3 within 3.5s+3.315s (+3.53%) | 160.4John Manfroy+18.7 mph (+13.2%) | -8.027squal -6.421s | 92.4%qual 93.9% | ||
8 rule changes (FC: 2, P: 6)1 cars added · 1 engine · 1 induction · 1 suspension & brakes · 1 weight · 3 wording · FC USF2000 Tube Frame may use Hewland LD200 4-speed H-pattern as alternative to Hewland JL-200 5-speed sequential. · FC F2000 Metrik ZF2 minimum weight reduced to 1220 lbs. · Prototype carbon-carbon and carbon-ceramic brake rotors now permitted instead of prohibited. · P class 13B rotary engine restrictor changes to 40mm SIR fuel injection or 41.5mm venturi carburetor. · Prototype class adds Radical SR3 spec line to Table 1 effective 9/1/25. · Prototype P2 cars may now run P2 spec or modified Prototype spec in Prototype class; clarified language and added Radical Cup series table. · Prototype Engine Table A 2-cycle restrictor reduces from 40mm to 38mm venturi size. · Class P adds clarification notes on restrictor requirements, throttle bodies, Mazda 12A engine spec, and P2 auto-based engine rules.show
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| Cal Club 2025 CALCL252025-02-22 | 1:50.067Paul MacFarlane · only car+38.132s (+53.01%) | 1:48.522Paul MacFarlane · only car | 114.4Paul MacFarlane | 1:32.872Jim Devenport · fastest of 3 · top 3 within 8.1s | 1:33.972Jim Devenport · fastest of 3 · top 3 within 7.7s | 141.7Jim Devenport | -14.550squal -17.195s | 86.6%qual 84.4% | ||
8 rule changes (FC: 6, P: 2)2 cars added · 1 engine · 1 tyres & wheels · 1 weight · 3 wording · Prototype Staudacher and unrestricted engine notes corrected for minimum weight wording. · Prototype class renamed from P1 to P, affecting designation throughout rules with no performance changes. · FC tire limit reduced to four dry and four wet for Regional/Major/Super Tour, eight for Runoffs. · FF and FC cars with sequential gearbox must add 10 lbs. to minimum weight, down from 25 lbs. · FC adds F2000 Metrik ZF2 with Ford Zetec engine and four-piston Brembo calipers as spec-line car. · F600 Rotax 494, 493, 593 engines now require single expansion chamber and pull starter; electric starter optional. · FC tire marking rule clarified: four dry and wet tires for Regionals, eight each for Runoffs; damaged tire replacement procedures revised. · USF2000 Van Diemen with Mazda MZR LF-DE 2.0L added as spec line car in FC; removed from FX.show
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| Cal Club 2023 CALCL232023-02-24 | 1:11.935Peter West · fastest of 3 · top 3 within 2.6s | |||||||||
13 earlier rule changes on record, in force before Cal Club 2023 (from 2019)3 weight · 10 wording · FC/FF PE3-8400 ECU monitor firmware version reduced from V3.04.50 to V3.04.35. · FC Ford Zetec Performance Electronics ECU model renamed PE-3 to PE3-8400; Monitor firmware updated to V3.04.50. · FC chassis/frame section reorganized: anti-intrusion panels between main tubes clarified, suspension mounting restrictions strengthened, firewall requirements reworded. · FC Zetec ECU requirements clarified: Pectel T2 or Performance PE-3 required with specific communications ports and SCCA tune-file/map. · FC composite anti-intrusion panels of non-uniform thickness limited to eight fasteners per side. · FC tire marking rules clarified: competitor responsible for declaring, marking, and logging tires with Tech before qualifying or race. · FC Pinto engine loses 10 lbs to 1190; Pinto aluminum head loses 10 lbs to 1190; Zetec loses 10 lbs to 1210. · FC: Pectel T2 and Performance PE-3 ECU maps clarified; SCCA Club or 2013 Pro map required. · FC Zetec engine minimum weight increases 20 lbs to 1220 lbs. · FC Zetec connecting rods now allow Eagle #CRS5483F3D in addition to original Ford. · FC adds Mahle #930169439 piston as alternate option to existing Ford, Sealed Power, and United Engine choices. · FC Wiseco piston and Crower connecting rod part numbers updated; minimum weight 976 grams. · FC Wiseco piston and Crower connecting rod assembly minimum weight increases from 555 to 976 grams.show
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Best is the class's fastest lap in that event's qualifying or race sessions, with the driver who set it, how many cars set a time that session and how close the top five were; a best from fewer than three cars is greyed. With two or more classes, "vs" is the gap of each class's best to the first class's at the same event. "% of FC" is the class's best as a share of FC's best at the same event (100% is level, less is quicker): weather and track condition move every class together, so this compares across years where the raw times do not. It still breaks when FC's own field changes or one session was wet and another dry. Newest event first. The coloured figure under each value is the change from the previous event that has one (green is quicker, red slower). Whole laps only, so events with different sector layouts still compare. Weather and track condition are not accounted for.