BoP Lab / Buttonwillow Raceway Park
F500 vs F6 vs SRF vs FF pace at Buttonwillow Raceway Park
Quickest here: FF 1:51.118 Eric Poulsen, Cal Club 2025 race
| Event | F500 | F6 | SRF | FF | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Qual best | Race best | Trap | Qual best | Race best | Trap | vs F500 | Qual best | Race best | Trap | vs F500 | Qual best | Race best | Trap | vs F500 | |||
| Cal Club 2026 CALCL262026-02-21 | 1:53.098Edward Erlandson · fastest of 2+1.054s (+0.94%) | 1:54.741Edward Erlandson · fastest of 2+3.623s (+3.26%) | 133.7Edward Erlandson+19.0 mph (+16.5%) | ||||||||||||||
6 rule changes (SRF: 3, FF: 3)3 tyres & wheels · 3 other · FF clarifies alternative tire eligibility: homologated 1989 or earlier with rocker or outboard suspension all four corners; push-rod/pull-rod cars may seek approval. · FF adds rocker arm and outboard suspension cars option to use Hoosier bias ply slicks or VFF tyres; clarifies mixing rules. · FF adds alternative tire options for older cars with rocker arm or outboard suspension: bias ply slicks or VFF radials.show
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| Cal Club 2025 CALCL252025-02-22 | 1:52.044Eric Poulsen · only car | 1:51.118Eric Poulsen · only car | 114.7Eric Poulsen | ||||||||||||||
43 earlier rule changes on record, in force before Cal Club 2025 (from 2019)9 tyres & wheels · 8 engine · 8 suspension & brakes · 5 weight · 1 aero · 6 wording · 6 other · FF and FC sequential gearbox weight penalty reduces from 25 lbs to 10 lbs minimum weight addition. · FF Honda Fit pistons: OEM 0.25mm oversize PN 13020-RB7-Z00 or Fast Forward PN FF800-110 now both allowed; standard diameter 73.240mm (2.8835 inches), minimum weight 198.0g. · FF EGR blanking plate rule clarified: VTEC activation valve must be retained and functioning, no modifications permitted. · FE and SRF protest fee rules redirected to GCR section 8.3.1.D for fees and procedure. · FF Honda Fit gains Fast Forward oversize piston ring option PN FF800-100 as alternative to Riken or Nippon. · FF Honda Fit engine adds Fast Forward part number alternatives for intake, exhaust, oil system, and scavenge pump components. · FF block relief permitted only as needed to fit an allowed crankshaft. · FF class cylinder head now permits optional coolant bleed line pipe thread fitting to swirl tower. · FF Honda LC1 ECU supplied by HPD is permitted effective 12/1/2020 with HPD lambda sensor. · FF Honda LC1 ECU implementation date clarified to pending, contingent on SCCA receiving sufficient support materials. · FF Kent Engine alternator becomes optional instead of not required. · FF permits HPD LC1 ECU with lambda sensor; E1 ECU no longer supported but existing units may continue. · FF rain tyres now allow Hoosier W3 Radial 185/60R13 front and 205/60R13 rear. · FF Honda Fit cylinder honing increased to 73.315mm and oversize pistons PN 13020-RB7-Z00 now permitted with matching ring packs. · FF intake manifold thermal wrap now permitted if easily removable for inspection; no coating allowed. · FF clarifies coolant and oil catch tank capacity requirements: coolant minimum one U.S. pint, oil minimum one U.S. quart per system.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. 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.