BoP Lab / Buttonwillow Raceway Park

P2 pace at Buttonwillow Raceway Park

	Event	P2
	Event	Qual best	Race best	Trap
	Cal Club 2026 CALCL262026-02-21	1:37.278Tim Day Jr · 1 car	1:39.758Tim Day Jr · 1 car	155.4Tim Day Jr
47 earlier rule changes on record, in force before Cal Club 2026 (from 2019)17 engine · 7 tyres & wheels · 7 weight · 5 induction · 2 aero · 2 cars added · 2 wording · 5 othershowhide 2024-12-01 2000 cc Pinto Engine Car Weight #37187weight 2024-05-01 CN Spec ECU #35835engine 2024-05-01 E&O - Correct FIA Group CN spec line notes #35900tyres & wheels 2024-01-01 E&O - Clarify B.1 modified engine range in AMAC spec lines #35225engine 2024-01-01 Replacement Engine Crankcase for 07/08 Suzuki GSX-R1000 Engines #35340engine 2023-12-01 Correct Table 1 for Engine Date Range Specifications #35182engine 2023-05-01 Clarify minimum side body height requirement #34143tyres & wheels 2023-05-01 Clarify closed cockpit single seat car allowance #34144wording 2023-04-01 Remove redundant effective date language and update engine table #34012engine 2023-04-01 E&O - Correct dimensional equivalents #34038weight 2023-01-01 Request to Classify Sebeco NP01 #33378cars added 2023-01-01 Radical spec line clarifications #33485weight 2023-01-01 E&O original class intent #33519weight 2023-01-01 Update Engine Table Spec Line B.1 #33608engine 2022-05-01 E&O Clarification of Chassis Construction Requirements #32469tyres & wheels 2022-05-01 Clean up P2 wording #32525wording 2022-04-01 After Market to Aftermarket #32373other 2022-03-01 Add spec line for Beasley B2 #32147weight 2022-03-01 E&O Table 1 spec line wing terminology #32148aero 2022-03-01 E&O class name #32196other 2022-02-01 E&O Engine section #31969engine 2022-01-01 E&O letter #31539 – Control Area definition #31783tyres & wheels 2021-12-01 BoP adjustment effective 1-1-22 #31538engine 2021-12-01 E&O clarification of "Control Area" definition #31539tyres & wheels 2021-09-01 P2 CN Engine Rebuild Clarification #31000engine 2021-08-01 F5 P2 Conversion #30856other 2021-08-01 Clarify minimum body width requirement #30859tyres & wheels 2021-05-01 E&O tonneau cover provision in cockpit opening section #30459other 2021-05-01 Remove effective dates in Table 1 #30468other 2021-05-01 E&O Maximum Valves Per Cylinder #30560engine 2021-03-01 Add a new spec line for a 2-cycle, 3-cylinder engine up to 820cc #30272engine 2020-12-01 Balance of Performance adjustments effective 01-01-2021 #29822induction 2020-09-01 E&O clarification of P2 rear wing requirements #29205aero 2020-06-01 Classify Elan NP01 in P2 Table 1 #28812cars added 2020-05-01 SCCA Enterprises ESR / P2 engine restrictor testing #28669induction 2020-04-01 Add ESR inlet restrictor #27869induction 2020-03-01 Request for Fly by Wire Rule Wording Change #28247engine 2020-01-01 Request for addition of BMW Engine in P2 Engine Table #27821engine 2019-10-01 Update Engine Table Line E notes #27414engine 2019-08-31 Update P2 Engine Table spec lines to reflect 3/1/2019 #27254engine 2019-07-01 E&O Transmissions #27006tyres & wheels 2019-06-01 Request to restrict all cars #26246weight 2019-03-01 Change Engine Table Lines B.1 & B.5 #25777engine 2019-03-01 Change Line A.1 restrictor size #26429induction 2019-01-01 Request to Allow 1345cc Hayabusa Engines for Spec Line P2 Cars #25595engine 2019-01-01 Change CN inlet restrictor implementation date #25816induction 2019-01-01 Clarify Honda K20A-FD2 parts requirement #25950weight

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.