BoP Lab / Buttonwillow Raceway Park

FE vs FB vs SRF vs GT3 pace at Buttonwillow Raceway Park

Quickest here: FE 1:47.040 Brandon Chappell, Super Tour Apr 2018 race · FB 1:38.870 Gary Hickman, Super Tour Apr 2018 race · SRF 1:44.060 Vince Balch, Super Tour Apr 2017 qualifying · GT3 1:40.093 Michael Lewis, Super Tour Apr 2018 race

Lap times% of FE

FEFBSRFGT3solid race · dashed qualifying · slower is lower

FEFBSRFGT3solid race · dashed qualifying · each class's best lap as a share of FE's at the same event (the reference class, changeable above); 100% is level, higher is quicker

	Event	FE			FB					SRF					GT3
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs FE	% of FE	Qual best	Race best	Trap	vs FE	% of FE	Qual best	Race best	Trap	vs FE	% of FE
	Super Tour Feb 2020 ST20FEB212020-02-21														1:50.937Michael Lewis · fastest of 10 · top 5 within 5.7s-0.936s (-0.84%)	1:51.160Michael Lewis · fastest of 11 · top 5 within 3.8s-3.520s (-3.07%)	139.3Taz Harvey+16.7 mph (+13.6%)
22 rule changes (FE: 6, SRF: 5, GT3: 11)4 cars added · 4 induction · 3 tyres & wheels · 3 weight · 2 suspension & brakes · 1 aero · 1 engine · 4 othershowhide 2020-02-01 GT3 Windshield Clips #27323other 2020-01-01 FE Request for FE / FE2 preparation rules update #27722weight 2020-01-01 GT3 Request Factory Five Daytona coupe classification #26308cars added 2020-01-01 GT3 Request restrictor size change request #26958induction 2020-01-01 GT3 Request to Classify Alfa Romeo 4C #27322cars added 2020-01-01 GT3 Request for Mazda 2.5l MZR/L5-VE #27570induction -245 lbs 2020-01-01 GT3 GT3 turbo engines add Honda #28033induction 2020-01-01 GT3 GT3 wing end plate #28035aero 202-01-01 SRF SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes 2019-12-01 FE FE / FE2 Update Rules #27624weight 2019-12-01 GT3 Request to Add SR16VE to GT-3 Spec Lines #27357cars added 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 2019-10-01 FE FE Wet Tire E&O #27365tyres & wheels 2019-08-31 GT3 Requesting Increase in Choke Diameter for Mazda 12A Bridgeport #27043induction 2019-07-01 FE FE Tire Update #27029tyres & wheels 2019-07-01 SRF SRF Dash Windscreen Kit #27028other 2019-05-31 FE FE Anti-Roll Bar Clarification #26912suspension & brakes 2019-05-31 FE FE / FE2 Updated Bubble Tail Rule #26913other 2019-05-01 GT3 Request GTX Fuel injection for previous GT-1 tube frame cars #26141engine 2019-05-01 GT3 Request to Classify Ligier JS2 R #26535cars added
	Super Tour Apr 2019 ST19APR262019-04-26	1:49.749Jeff Read · only car+2.153s (+2.00%)	1:50.132Jeff Read · fastest of 2+3.092s (+2.89%)	119.6Joe Reppert											1:51.873Michael Lewis · fastest of 11 · top 5 within 6.2s+0.532s (+0.48%)	1:54.680Michael Lewis · fastest of 10 · top 5 within 2.9s+14.587s (+14.57%)	122.7Michael Lewis	+4.548squal +2.124s	104.1%qual 101.9%
6 rule changes (FE: 1, GT3: 5)2 cars added · 2 weight · 1 suspension & brakes · 1 tyres & wheelsshowhide 2019-04-01 GT3 26076 revised Spec line chart #26528weight 2019-04-01 GT3 Request Ride Height Clarification #26600suspension & brakes 2019-03-01 FE Request to Update Hoosier Rain Tire Part Number for the FE cars #26235tyres & wheels 2019-03-01 GT3 Request clarification on bridge porting for rotary #26076weight 2019-03-01 GT3 Request to add 4G69 Mitsubishi #26154cars added 2019-01-01 GT3 GTX Homologation table update #26034cars added
	Super Tour Apr 2018 BUTTRA182018-04-27	1:47.596John Yeatman · fastest of 3 · top 3 within 13.1s-1.154s (-1.06%)	1:47.040Brandon Chappell · fastest of 3 · top 3 within 11.2s-1.159s (-1.07%)		1:39.142Gary Hickman · fastest of 2-3.130s (-3.06%)	1:38.870Gary Hickman · fastest of 2-1.241s (-1.24%)		-8.170squal -8.454s	92.4%qual 92.1%						1:51.341Michael Lewis · fastest of 7 · top 5 within 6.9s+1.772s (+1.62%)	1:40.093Michael Lewis · fastest of 6 · top 5 within 16.8s-12.227s (-10.89%)		-6.947squal +3.745s	93.5%qual 103.5%
No rule changes on record between these events
	Super Tour Apr 2017 BUTTRA172017-04-28	1:48.750Brandon Aleckson · fastest of 2	1:48.199Brandon Aleckson · fastest of 2		1:42.272John LaBrie · fastest of 2	1:40.111Gary Hickman · fastest of 2		-8.088squal -6.478s	92.5%qual 94.0%	1:44.060Vince Balch · fastest of 8 · top 5 within 18.6s	2:01.122Mike Miserendino · fastest of 7 · top 5 within 1.8s		+12.923squal -4.690s	111.9%qual 95.7%	1:49.569Collin Jackson · fastest of 5 · top 5 within 13.8s	1:52.320Collin Jackson · fastest of 5 · top 5 within 12.1s		+4.121squal +0.819s	103.8%qual 100.8%

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