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BoP Lab / Buttonwillow Raceway Park

F500 vs SRF vs F5 vs FX pace at Buttonwillow Raceway Park

Class · click a class to switch, + to compare alongside (up to 4: remove one to add another)
ASB-SpecEPvsF5×F500×FAFCFE2FFFPFVvsFX×GT1GT2GTXHPPP2SMSMXvsSRF×SRF3STLSTUT1T2T3T4Show 12 inactive classes
Reference class · the others' laps as a share of this one's at the same event, so years compare despite weather; + a class above to measure against it
Track configuration

Quickest here: SRF 1:44.060 Vince Balch, Super Tour Apr 2017 qualifying · F5 1:51.129 Jeff Jorgenson, Super Tour Apr 2017 race · FX 1:48.518 Bill Weaver, Super Tour Feb 2020 race

1:451:501:552:008 rule changes between Super Tour Apr 2017 and Super Tour Feb 20208 ▾SRF race best at Super Tour Apr 2017: 2:01.122 (Mike Miserendino)SRF qualifying best at Super Tour Apr 2017: 1:44.060 (Vince Balch)F5 race best at Super Tour Apr 2017: 1:51.129 (Jeff Jorgenson)F5 qualifying best at Super Tour Apr 2017: 1:52.268 (Jeff Jorgenson)FX race best at Super Tour Feb 2020: 1:48.518 (Bill Weaver)FX qualifying best at Super Tour Feb 2020: 1:49.320 (Steve Martin)Super Tour Apr 2017Super Tour Apr2017Super Tour Feb 2020Super Tour Feb2020
F500SRFF5FXsolid race · dashed qualifying · slower is lower
EventF500SRFF5FX
Qual bestRace bestTrapQual bestRace bestTrapvs F500Qual bestRace bestTrapvs F500Qual bestRace bestTrapvs F500
Super Tour Feb 2020 ST20FEB212020-02-211:49.320Steve Martin · fastest of 5 · top 5 within 6.7s1:48.518Bill Weaver · fastest of 5 · top 5 within 6.8s129.9Steve Martin
8 rule changes (SRF: 5, F5: 2, FX: 1)2 weight · 1 induction · 1 suspension & brakes · 1 tyres & wheels · 1 wording · 2 other · Pro Formula F 2000 and USF2000 Tube Frame engine and car rules simplified; FC rules and FRP MAZDA MZR F2000 specs now apply directly. · 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
  • FX Change to FX Table 1 #28322wordingunclearPro Formula F 2000 and USF2000 Tube Frame engine and car rules simplified; FC rules and FRP MAZDA MZR F2000 specs now apply directly.
  • F5 Change 600cc restrictor size #27883inductionslower · inductionF500 Honda CBR600RR, Suzuki GSXR600, Yamaha R6 restrictor reduced to 28mm from 29mm.
  • SRF SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes
  • SRF SRF Tire Warmer Rule #27622tyres & wheels
  • SRF SRF / SRF3 Nose Weight Reduction #27706weight
  • SRF SRF / SRF3 Majors & Regional Class Updates #27723other
  • 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.
  • SRF SRF Dash Windscreen Kit #27028other
Super Tour Apr 2017 BUTTRA172017-04-281:44.060Vince Balch · fastest of 8 · top 5 within 18.6s2:01.122Mike Miserendino · fastest of 7 · top 5 within 1.8s1:52.268Jeff Jorgenson · fastest of 21:51.129Jeff Jorgenson · fastest of 2

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. 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.