BoP Lab / Buttonwillow Raceway Park

F5 vs SRF vs FM vs P1 pace at Buttonwillow Raceway Park

Quickest here: F5 1:51.129 Jeff Jorgenson, Super Tour Apr 2017 race · SRF 1:44.060 Vince Balch, Super Tour Apr 2017 qualifying · FM 1:45.954 Mike Anderson, Super Tour Apr 2018 race · P1 1:34.975 Jim Devenport, Super Tour Feb 2020 qualifying

Lap times% of F5

F5SRFFMP1solid race · dashed qualifying · slower is lower

F5SRFFMP1solid race · dashed qualifying · each class's best lap as a share of F5's at the same event (the reference class, changeable above); 100% is level, higher is quicker

	Event	F5			SRF					FM					P1
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs F5	% of F5	Qual best	Race best	Trap	vs F5	% of F5	Qual best	Race best	Trap	vs F5	% of F5
	Super Tour Feb 2020 ST20FEB212020-02-21														1:34.975Jim Devenport · fastest of 4 · top 4 within 7.1s-2.683s (-2.75%)	1:36.224Jim Devenport · fastest of 4 · top 4 within 5.9s-2.632s (-2.66%)	148.8Johnnie Crean+15.3 mph (+11.5%)
18 rule changes (F5: 2, SRF: 5, P1: 11)4 weight · 3 induction · 2 engine · 2 tyres & wheels · 1 removed · 1 suspension & brakes · 1 wording · 4 other · F500 Honda CBR600RR, Suzuki GSXR600, Yamaha R6 restrictor reduced to 28mm from 29mm. · F500 Honda CBR600RR, Suzuki GSXR600, and Yamaha R6 minimum weights increase to 900 lbs.showhide 2020-02-01 P1 Extend date for removing sealed DP02-spec 2.0L option #28046weight 2020-01-01 F5 Change 600cc restrictor size #27883inductionslower · inductionF500 Honda CBR600RR, Suzuki GSXR600, Yamaha R6 restrictor reduced to 28mm from 29mm. 2020-01-01 P1 Remove sealed DP02-spec 2.0 MZR spec #26753induction 2020-01-01 P1 Update Revised Spec Line F #27745weight 202-01-01 SRF SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes 2019-12-01 SRF SRF Tire Warmer Rule #27622tyres & wheels 2019-12-01 SRF SRF / SRF3 Nose Weight Reduction #27706weight 2019-12-01 SRF SRF / SRF3 Majors & Regional Class Updates #27723other 2019-08-31 F5 Request for Weight Increase for Motorcycle Powered Cars #27214weight +25 lbsslower · weightF500 Honda CBR600RR, Suzuki GSXR600, and Yamaha R6 minimum weights increase to 900 lbs. 2019-08-01 P1 E&O Transmissions #27098other 2019-07-01 P1 E&O Transmissions #27005tyres & wheels 2019-07-01 P1 Move minimum height provision to #27031removed 2019-07-01 P1 Remove duplicative fender louver provision #27033induction 2019-07-01 SRF SRF Dash Windscreen Kit #27028other 2019-05-31 P1 Missing word E&O #26919other 2019-05-31 P1 E&O correction to GCR 9.1.8.C.C. #26927wording 2019-05-01 P1 Clean up reference to engine table #26648engine 2019-05-01 P1 Remove redundant spec line #26692engine
	Super Tour Apr 2019 ST19APR262019-04-26									1:49.608Mike Anderson · fastest of 3 · top 3 within 5.6s+3.285s (+3.09%)	1:49.409Mike Anderson · fastest of 3 · top 3 within 4.9s+3.455s (+3.26%)	121.2Mike Anderson			1:37.658Jim Devenport · fastest of 3 · top 3 within 8.6s-1.339s (-1.35%)	1:38.856Jim Devenport · fastest of 3 · top 3 within 4.2s+1.745s (+1.80%)	133.5Jeffrey Lederman
6 rule changes (P1: 6)3 engine · 2 induction · 1 wordingshowhide 2019-04-01 P1 Clean Up Engine Table Language #26590engine 2019-03-01 P1 Move single-seat closed cockpit provision to #26376wording 2019-02-01 P1 Correct errors in GCR section 9.1.8.C.J #26144engine 2019-01-01 P1 Remove redundant inlet restrictor provisions #25877induction 2019-01-01 P1 Clarify Honda K20A-FD2 parts requirement #25949engine 2019-01-01 P1 Correct GCR section 9.1.8.C.J errors #25966induction
	Super Tour Apr 2018 BUTTRA182018-04-27									1:46.323Mike Anderson · fastest of 9 · top 5 within 2.1s+0.367s (+0.35%)	1:45.954Mike Anderson · fastest of 9 · top 5 within 3.3s-0.317s (-0.30%)				1:38.997Chip Romer · fastest of 6 · top 5 within 7.8s+2.677s (+2.78%)	1:37.111Chip Romer · fastest of 6 · top 5 within 13.4s-0.316s (-0.32%)
No rule changes on record between these events
	Super Tour Apr 2017 BUTTRA172017-04-28	1:52.268Jeff Jorgenson · fastest of 2	1:51.129Jeff Jorgenson · fastest of 2		1:44.060Vince Balch · fastest of 8 · top 5 within 18.6s	2:01.122Mike Miserendino · fastest of 7 · top 5 within 1.8s		+9.993squal -8.208s	109.0%qual 92.7%	1:45.956Mike Anderson · fastest of 8 · top 5 within 2.0s	1:46.271Mike Anderson · fastest of 10 · top 5 within 2.1s		-4.858squal -6.312s	95.6%qual 94.4%	1:36.320Jim Devenport · fastest of 5 · top 5 within 6.9s	1:37.427Parker Nicklin · fastest of 5 · top 5 within 6.2s		-13.702squal -15.948s	87.7%qual 85.8%

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 F5" is the class's best as a share of F5'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 F5'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.