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BoP Lab / Buttonwillow Raceway Park

F6 vs FE vs SRF 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 SpecB-SpecBSpcEPF5F6×F500FAFBFCvsFE×FE 2FE2FFFMFPFVvsFX×GT1GT2GT3GT3UGTLGTXHPPP1P2PXSMSMXvsSRF×SRF3STLSTUT1T2T3T4
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: FE 1:47.040 Brandon Chappell, Super Tour Apr 2018 race · SRF 1:44.060 Vince Balch, Super Tour Apr 2017 qualifying · FX 1:48.518 Bill Weaver, Super Tour Feb 2020 race

1:451:501:552:001 rule change between Super Tour Apr 2018 and Super Tour Apr 20191 ▾12 rule changes between Super Tour Apr 2019 and Super Tour Feb 202012 ▾FE race best at Super Tour Apr 2017: 1:48.199 (Brandon Aleckson)FE race best at Super Tour Apr 2018: 1:47.040 (Brandon Chappell)FE race best at Super Tour Apr 2019: 1:50.132 (Jeff Read)FE qualifying best at Super Tour Apr 2017: 1:48.750 (Brandon Aleckson)FE qualifying best at Super Tour Apr 2018: 1:47.596 (John Yeatman)FE qualifying best at Super Tour Apr 2019: 1:49.749 (Jeff Read)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)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 20172017Super Tour Apr 20182018Super Tour Apr 20192019Super Tour Feb 20202020
F6FESRFFXsolid race · dashed qualifying · slower is lower
EventF6FESRFFX
Qual bestRace bestTrapQual bestRace bestTrapvs F6Qual bestRace bestTrapvs F6Qual bestRace bestTrapvs F6
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
12 rule changes (FE: 6, SRF: 5, FX: 1)3 tyres & wheels · 2 suspension & brakes · 2 weight · 1 aero · 1 cars added · 1 induction · 2 other · FE2 Mazda 2.0L MZR engine now permitted in all SCCA events at 1250 lbs minimum; FE 2.3L becomes Regional Only through 2019 Runoffs. · FE minimum weight rises to 1270 lbs; FE2 minimum weight rises to 1270 lbs; new spring options added; tire warmers prohibited. · FE Hoosier wet rear tire width increases from 7.5 to 8.0 inches, part number 44196 W3. · FE removes American Racer tires, mandates Hoosier dry tires 22.0 X 8.0-13 and 22.0 X 10.0-13, wet tires 22.0 X 7.5-13 and 22.0 X 9.0-13. · FE anti-roll bar links may be removed one per end for safety, but bars must stay connected. · FE and FE2 Enterprise bubble tail P/N WM138014 newly allowed for both classes.showhide
  • FX Change to FX Table 1 #28322induction
  • FE Request for FE / FE2 preparation rules update #27722cars addedaddedFE2 Mazda 2.0L MZR engine now permitted in all SCCA events at 1250 lbs minimum; FE 2.3L becomes Regional Only through 2019 Runoffs.
  • SRF SRF Rain / Brake Rule - BoD approved as follows #34958suspension & brakes
  • FE FE / FE2 Update Rules #27624weightslower · weightFE minimum weight rises to 1270 lbs; FE2 minimum weight rises to 1270 lbs; new spring options added; tire warmers prohibited.
  • SRF SRF Tire Warmer Rule #27622tyres & wheels
  • SRF SRF / SRF3 Nose Weight Reduction #27706weight
  • SRF SRF / SRF3 Majors & Regional Class Updates #27723other
  • FE FE Wet Tire E&O #27365tyres & wheelstyres & wheelsFE Hoosier wet rear tire width increases from 7.5 to 8.0 inches, part number 44196 W3.
  • FE FE Tire Update #27029tyres & wheelstyres & wheelsFE removes American Racer tires, mandates Hoosier dry tires 22.0 X 8.0-13 and 22.0 X 10.0-13, wet tires 22.0 X 7.5-13 and 22.0 X 9.0-13.
  • SRF SRF Dash Windscreen Kit #27028other
  • FE FE Anti-Roll Bar Clarification #26912suspension & brakessuspension & brakesFE anti-roll bar links may be removed one per end for safety, but bars must stay connected.
  • FE FE / FE2 Updated Bubble Tail Rule #26913aeroadded · aeroFE and FE2 Enterprise bubble tail P/N WM138014 newly allowed for both classes.
Super Tour Apr 2019 ST19APR262019-04-261:49.749Jeff Read · only car+2.153s (+2.00%)1:50.132Jeff Read · fastest of 2+3.092s (+2.89%)119.6Joe Reppert
1 rule change (FE: 1)1 tyres & wheels · FE Hoosier rain tyre part numbers updated: front 44195 W3, rear 44217 W3.showhide
  • FE Request to Update Hoosier Rain Tire Part Number for the FE cars #26235tyres & wheelstyres & wheelsFE Hoosier rain tyre part numbers updated: front 44195 W3, rear 44217 W3.
Super Tour Apr 2018 BUTTRA182018-04-271:47.596John 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%)
No rule changes on record between these events
Super Tour Apr 2017 BUTTRA172017-04-281:48.750Brandon Aleckson · fastest of 21:48.199Brandon Aleckson · fastest of 21:44.060Vince Balch · fastest of 8 · top 5 within 18.6s2:01.122Mike Miserendino · fastest of 7 · top 5 within 1.8s

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.