BoP Lab / Buttonwillow Raceway Park

FE vs FM vs FB vs FX pace at Buttonwillow Raceway Park

Lap times across years say as much about the weather as the class. % of FE is each class's best lap as a share of FE's on the same day, so the conditions drop out: 100% is level, less is quicker, and a move in it is the class getting faster or slower against the field.

Quickest here: FE 1:47.040 Brandon Chappell, Super Tour Apr 2018 race · FM 1:45.954 Mike Anderson, Super Tour Apr 2018 race · FB 1:38.870 Gary Hickman, Super Tour Apr 2018 race · FX 1:48.518 Bill Weaver, Super Tour Feb 2020 race

% of FELap times

FEFMFBFXsolid race · dashed qualifying · slower is lower

FEFMFBFXsolid 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, less is quicker, so up the chart is quicker

	Event	FE			FM					FB					FX
	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 2022 CALCL222022-02-17														1:48.641Max Parker · fastest of 3 · top 3 within 5.1s-0.679s (-0.62%)	1:50.238Max Parker · fastest of 3 · top 3 within 3.9s+1.720s (+1.58%)	117.4Terrance Carraher-12.5 mph (-9.6%)
22 rule changes (FE: 8, FX: 14)8 tyres & wheels · 5 cars added · 2 aero · 2 suspension & brakes · 1 induction · 1 wording · 3 othershowhide 2022-02-01 FX FM Rule Set Clarification #31881tyres & wheels 2022-02-01 FX E&O F4 Tires #31940tyres & wheels 2022-02-01 FX E&O USF2000 Tube Frame #31951tyres & wheels 2022-02-01 FX URGENT - FX- Formula Renault Tire #32058tyres & wheels 2021-12-01 FE Two FE2 Rule Updates #31524other 2021-08-01 FX Rules Adjustment #30950tyres & wheels 2021-07-01 FE FE Tire Rule Changes #30754tyres & wheels 2021-07-01 FE Radiator Screens Clarification #30792wording 2021-06-01 FE FE Radiator Screens #30575other 2021-06-01 FX FX/FRP Tire Rule #30723tyres & wheels 2021-05-01 FX Classify the 2000-2009 Formula Renault 2.0 / Fran-Am 2000 #30460cars added 2021-01-01 FX Request for Car Classification to Compete in Formula X #29933cars added 2020-12-01 FE FE / FE2 Spring Updates #29689suspension & brakes 2020-12-01 FX Update specifications for FormulaSPEED cars #29674induction 2020-10-01 FE FE Gurney Flap Spec Update #29445aero 2020-09-01 FX Follow up to to Letter#28991 Request for FX classification #29281cars added 2020-07-01 FX Request to be added to FX group #28991other 2020-06-01 FE FE Gurney flap wicker clarification #28885aero 2020-05-01 FE FE spring rule update changed to November 1, 2020 #28814suspension & brakes 2020-04-01 FX Request to classify FSV in FX #28057cars added 2020-04-01 FX Classify FormulaSPEED in FX #28715cars added 2020-03-01 FX Request to remove tire marking language from FM #28415tyres & wheels
	Super Tour Feb 2020 ST20FEB212020-02-21														1:49.320Steve Martin · fastest of 5 · top 5 within 6.7s	1:48.518Bill Weaver · fastest of 5 · top 5 within 6.8s	129.9Steve Martin
7 rule changes (FE: 6, FX: 1)2 tyres & wheels · 2 weight · 1 induction · 1 suspension & brakes · 1 othershowhide 2020-02-01 FX Change to FX Table 1 #28322induction 2020-01-01 FE Request for FE / FE2 preparation rules update #27722weight 2019-12-01 FE FE / FE2 Update Rules #27624weight 2019-10-01 FE FE Wet Tire E&O #27365tyres & wheels 2019-07-01 FE FE Tire Update #27029tyres & wheels 2019-05-31 FE FE Anti-Roll Bar Clarification #26912suspension & brakes 2019-05-31 FE FE / FE2 Updated Bubble Tail Rule #26913other
	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	1:49.608Mike 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	-0.723squal -0.141s	99.3%qual 99.9%
1 rule change (FE: 1)1 tyres & wheelsshowhide 2019-03-01 FE Request to Update Hoosier Rain Tire Part Number for the FE cars #26235tyres & wheels
	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%)		1:46.323Mike 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%)		-1.086squal -1.273s	99.0%qual 98.8%	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%
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		1:45.956Mike Anderson · fastest of 8 · top 5 within 2.0s	1:46.271Mike Anderson · fastest of 10 · top 5 within 2.1s		-1.928squal -2.794s	98.2%qual 97.4%	1:42.272John LaBrie · fastest of 2	1:40.111Gary Hickman · fastest of 2		-8.088squal -6.478s	92.5%qual 94.0%

About this data

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.