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BoP Lab / Buttonwillow Raceway Park

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

Class · click a class to switch, + to compare alongside (up to 4: remove one to add another)
ASB SpecB-SpecBSpcEPF5×F6vsF500×FAFBFCvsFE×FE 2FE2FFFMFPFVFXGT1GT2GT3GT3UGTLGTXHPPP1P2PXSMSMXvsSRF×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

Quickest here: F5 1:51.129 Jeff Jorgenson, Super Tour Apr 2017 race · SRF 1:44.060 Vince Balch, Super Tour Apr 2017 qualifying · FE 1:47.040 Brandon Chappell, Super Tour Apr 2018 race

1:451:501:552:001 rule change between Super Tour Apr 2018 and Super Tour Apr 20191 ▾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)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)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)Super Tour Apr 20172017Super Tour Apr 20182018Super Tour Apr 20192019
F5SRFF500FEsolid race · dashed qualifying · slower is lower
92%94%96%98%100%102%104%106%108%110%1 rule change between Super Tour Apr 2018 and Super Tour Apr 20191 ▾F5 race best at Super Tour Apr 2017: 100.0% of F5's (Jeff Jorgenson)F5 qualifying best at Super Tour Apr 2017: 100.0% of F5's (Jeff Jorgenson)SRF race best at Super Tour Apr 2017: 109.0% of F5's (Mike Miserendino)SRF qualifying best at Super Tour Apr 2017: 92.7% of F5's (Vince Balch)FE race best at Super Tour Apr 2017: 97.4% of F5's (Brandon Aleckson)FE qualifying best at Super Tour Apr 2017: 96.9% of F5's (Brandon Aleckson)Super Tour Apr 20172017Super Tour Apr 20182018Super Tour Apr 20192019
F5SRFF500FEsolid race · dashed qualifying · each class's best lap as a share of F5's at the same event (the reference class, changeable above); 100% is level, higher is quicker
EventF5SRFF500FE
Qual bestRace bestTrapQual bestRace bestTrapvs F5% of F5Qual bestRace bestTrapvs F5% of F5Qual bestRace bestTrapvs F5% of F5
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 & wheelsshowhide
  • FE Request to Update Hoosier Rain Tire Part Number for the FE cars #26235tyres & wheels
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 BUTTRA172017-04-281:52.268Jeff Jorgenson · fastest of 21:51.129Jeff Jorgenson · 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+9.993squal -8.208s109.0%qual 92.7%1:48.750Brandon Aleckson · fastest of 21:48.199Brandon Aleckson · fastest of 2-2.930squal -3.518s97.4%qual 96.9%

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 F5" is the class's best as a share of F5'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 F5'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.