BoP Lab / Buttonwillow Raceway Park
FB vs F6 vs F5 vs BSpc pace at Buttonwillow Raceway Park
Lap times across years say as much about the weather as the class. % of FB is each class's best lap as a share of FB'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: FB 1:38.870 Gary Hickman, Super Tour Apr 2018 race · F6 1:59.670 Jeff Jorgenson, Super Tour Feb 2024 race · F5 1:51.129 Jeff Jorgenson, Super Tour Apr 2017 race
| Event | FB | F6 | F5 | BSpc | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Qual best | Race best | Trap | Qual best | Race best | Trap | vs FB | % of FB | Qual best | Race best | Trap | vs FB | % of FB | Qual best | Race best | Trap | vs FB | % of FB | |||
| Super Tour Feb 2024 CALCL242024-02-23 | 2:00.926Jeff Jorgenson · only car | 1:59.670Jeff Jorgenson · only car | 104.7Jeff Jorgenson | |||||||||||||||||
16 rule changes (F5: 16)3 engine · 1 cars added · 1 induction · 1 weight · 8 wording · 2 other · F500 Rotax 493 and 593 intake boots: removed Moto Tassinari V3124-873B-2 from 493/593 non-HO allowance, added Moto Tassinari V3120-794A-2 option for non-HO. · F500 Rotax engines now permit Ingi Tech Sparker ignition DCP-CDI-P2 as alternate ECU. · F500 clarifies stepped diameter exhaust headers prohibited except at cylinder head flange area. · F500 Rotax 593 intake boot options clarified; oil injection pump removal now permitted. · F500 Majors and Runoffs cars must install AIM part #X47KPFSOLO2R0 data box mount for Solo or Solo 2. · F5 cars must install AIM part #X47KPFSOLO2R0 data box mount for Majors and Runoffs. · F5 clarifies mechanical shifting only; throttle-cut and flat-shifter devices permitted if driver retains full control. · F5 single-seat open-wheel cars: rigid suspension becomes limited suspension in class definition. · F500 Rotax 593 HO engine now permitted; 875 lbs minimum weight, MA0242SP1020A or MA0242SP1063A restrictor, specific intake boots and piston required. · F500 Suzuki GSXR600 engine years extended from 2003-2013 to 2003-2019. · F5 request to adjust external jetting device cockpit control denied; no rule change made. · F5 driver adjustable carburettor mixture: refer to separate Fastrack letter #28359 for ruling. · F5 cockpit adjustment request response published in Fastrack letter 28359. · 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.show
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| Super Tour Apr 2018 BUTTRA182018-04-27 | 1:39.142Gary Hickman · fastest of 2-3.130s (-3.06%) | 1:38.870Gary Hickman · fastest of 2-1.241s (-1.24%) | ||||||||||||||||||
| No rule changes on record between these events | ||||||||||||||||||||
| Super Tour Apr 2017 BUTTRA172017-04-28 | 1:42.272John LaBrie · fastest of 2 | 1:40.111Gary Hickman · fastest of 2 | 1:52.268Jeff Jorgenson · fastest of 2 | 1:51.129Jeff Jorgenson · fastest of 2 | +11.018squal +9.996s | 111.0%qual 109.8% | ||||||||||||||
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 FB" is the class's best as a share of FB'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 FB'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.