BoP Lab / Buttonwillow Raceway Park

FE vs F5 vs GTL pace at Buttonwillow Raceway Park

Quickest here: FE 1:47.040 Brandon Chappell, Super Tour Apr 2018 race · F5 1:51.129 Jeff Jorgenson, Super Tour Apr 2017 race · GTL 1:58.269 Joe Huffaker, Super Tour Feb 2020 race

Lap times% of FE

FEF5GTLsolid race · dashed qualifying · slower is lower

FEF5GTLsolid 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			F5					GTL
	Event	Qual best	Race best	Trap	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									1:59.062Joe Huffaker · fastest of 5 · top 5 within 10.7s-1.294s (-1.08%)	1:58.269Joe Huffaker · fastest of 5 · top 5 within 13.1s-1.806s (-1.50%)	125.6Joe Huffaker+15.1 mph (+13.6%)
19 rule changes (FE: 6, F5: 2, GTL: 11)6 weight · 4 cars added · 3 tyres & wheels · 2 engine · 1 induction · 1 suspension & brakes · 2 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 GTL Windshield Clips #27323other 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 FE Request for FE / FE2 preparation rules update #27722weight 2020-01-01 GTL Request Factory Five Daytona coupe classification #26308cars added 2020-01-01 GTL Request to Classify the MK1 two door Jetta #27648cars added 2019-12-01 FE FE / FE2 Update Rules #27624weight 2019-12-01 GTL 88-91 Honda CRX Spec Line Correction #27233weight 2019-10-01 FE FE Wet Tire E&O #27365tyres & wheels 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. 2019-08-31 GTL Fun Cup Beetle #27334weight 2019-08-01 GTL GTL #26960weight 2019-07-01 FE FE Tire Update #27029tyres & wheels 2019-07-01 GTL Request CRZ wheelbase change #26896tyres & wheels 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 GTL Request to Classify VW Fun Cup Beetle #25986cars added 2019-05-01 GTL Request GTX Fuel injection for previous GT-1 tube frame cars #26141engine 2019-05-01 GTL Request to Classify Ligier JS2 R #26535cars added 2019-05-01 GTL Request for GTL Mazda 13B SIR Increase with Penalty #26572engine
	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						2:00.356Joe Huffaker · fastest of 2+1.537s (+1.29%)	2:00.075Joe Huffaker · fastest of 2+1.716s (+1.45%)	110.6Taz Harvey	+9.943squal +10.607s	109.0%qual 109.7%
7 rule changes (FE: 1, GTL: 6)2 cars added · 2 weight · 1 induction · 1 suspension & brakes · 1 tyres & wheelsshowhide 2019-04-01 GTL 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 GTL Request Mazda 12a Rotary SIR Increase #26081induction 2019-03-01 GTL Request to Classify Mustang 2 Body in GTL #26222cars added 2019-01-01 GTL Request for GTL Mini Adjustments #25754weight 2019-01-01 GTL BMC thru Rover Group remove long inactive mini #25771weight 2019-01-01 GTL 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%)							1:58.819Joe Huffaker · fastest of 4 · top 4 within 11.5s-6.719s (-5.35%)	1:58.359Joe Huffaker · fastest of 5 · top 5 within 10.8s-7.836s (-6.21%)		+11.319squal +11.223s	110.6%qual 110.4%
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		1:52.268Jeff Jorgenson · fastest of 2	1:51.129Jeff Jorgenson · fastest of 2		+2.930squal +3.518s	102.7%qual 103.2%	2:05.538John Bower · fastest of 4 · top 4 within 7.0s	2:06.195Bill Okell · fastest of 4 · top 4 within 6.1s		+17.996squal +16.788s	116.6%qual 115.4%

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.