BoP Lab / Buttonwillow Raceway Park

SM pace at Buttonwillow Raceway Park

SMsolid race · dashed qualifying · slower is lower

	Event	SM
	Event	Qual best	Race best	Trap
	Cal Club 2026 CALCL262026-02-21	2:01.392Ryan Busk · 18 cars+0.561s (+0.46%)	2:02.486William Rasmussen · 18 cars+0.836s (+0.69%)	127.3Sam Rezai+23.4 mph (+22.6%)
3 rule changes (SM: 3)1 tyres & wheels · 1 wording · 1 othershowhide 2025-06-01 SMX Data Submission - Penalties #38248other 2025-06-01 Committee) SMX Penaly Clarification updated language #38337wording 2025-05-01 Clarify Tire Marking Regs #38005tyres & wheels
	Cal Club 2025 CALCL252025-02-22	2:00.831William Wallis · 16 cars	2:01.650Nick Leverone · 16 cars	103.9Evan Jacobs
14 earlier rule changes on record, in force before Cal Club 2025 (from 2019)3 engine · 3 suspension & brakes · 2 weight · 1 tyres & wheels · 2 wording · 3 othershowhide 2024-12-01 E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other 2024-09-01 SMX Camera Rule Correction #36496wording 2024-09-01 Committee) AIM ECU Protocol #36556engine 2024-09-01 Committee) OE versus OEM Definitons #36608other 2024-09-01 Committee) Shifter Bushing #36611suspension & brakes 2023-01-01 BOP for NB1 and NB2 #32309weight 2022-04-01 Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes 2021-04-01 Updates - Obsolete Parts & BOP Parts #30438other 2020-10-01 Radiator E&O Clarifications #29294engine 2020-08-01 Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes 2019-03-01 Request to allow aftermarket fuel filters. #26370wording 2019-02-01 Request 99-00 replacement Wire harnesses #25602engine 2019-02-01 Organize and Clarify 9.1.7.C.1.o. #25913weight 2019-02-01 Strike Tire Tread Language #26123tyres & wheels

Best is the class's fastest lap in that event's qualifying or race sessions, with the driver who set it and how many cars set a time. 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.