BoP Lab / Buttonwillow Raceway Park
GTX pace at Buttonwillow Raceway Park
Lap times across years say as much about the weather as the class. % of the field is each class's best lap as a share of the field's on the same day (every class that ran that day but the ones shown, each scaled by its usual pace against SM and averaged, with each shown class's own track character taken out, so one figure reads the same across years and tracks), 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: GTX 1:49.596 Rob Scholl, Super Tour Feb 2025 race
| Event | GTX | |||||
|---|---|---|---|---|---|---|
| Qual best | Race best | Trap | % of the field | |||
| Super Tour Feb 2026 CALCL262026-02-21 | 1:54.892Moze Cowper · only car | 1:55.330Moze Cowper · only car+5.734s (+5.23%) | 146.0Moze Cowper+29.6 mph (+25.4%) | 94.2%qual 93.8% | ||
3 rule changes (GTX: 3)2 cars added · 1 engineshow | ||||||
| Super Tour Feb 2025 CALCL252025-02-22 | 1:49.596Rob Scholl · only car | 116.4Rob Scholl | 89.9% | |||
38 earlier rule changes on record, in force before Super Tour Feb 2025 (from 2019)18 cars added · 5 aero · 3 engine · 3 induction · 3 weight · 2 suspension & brakes · 1 wording · 3 othershow
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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 the field" is the class's best as a share of the field's at the same event: every class that ran that day but the ones shown, each scaled by its usual pace against SM and averaged, with each shown class's own track character taken out, so one figure reads the same across years and tracks (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 few classes ran 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.