Lap times across years say as much about the weather as the class. % of F5 is each class's best lap as a share of F5'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:F5 1:51.129 Jeff Jorgenson, Super Tour Apr 2017 race · SRF 1:44.060 Vince Balch, Super Tour Apr 2017 qualifying · F6 1:59.670 Jeff Jorgenson, Super Tour Feb 2024 race · GTL 1:57.623 Brian Linn, Super Tour Feb 2022 race
F5SRFF6GTLsolid race · dashed qualifying · slower is lower
F5SRFF6GTLsolid 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, less is quicker, so up the chart is quicker
Event
F5
SRF
F6
GTL
Qual best
Race best
Trap
Qual best
Race best
Trap
vs F5
% of F5
Qual best
Race best
Trap
vs F5
% of F5
Qual best
Race best
Trap
vs F5
% of F5
Super Tour Feb 2024 CALCL242024-02-23
2:00.926Jeff Jorgenson · only car
1:59.670Jeff Jorgenson · only car
104.7Jeff Jorgenson
1:57.793Brian Linn · fastest of 3 · top 3 within 7.8s-1.723s (-1.44%)
1:59.526Brian Linn · fastest of 3 · top 3 within 8.6s+1.903s (+1.62%)
1:58.819Joe Huffaker · fastest of 4 · top 4 within 11.5s-6.719s (-5.35%)
1:58.359Joe Huffaker · fastest of 5 · top 5 within 10.8s-7.836s (-6.21%)
No rule changes on record between these events
Super Tour Apr 2017 BUTTRA172017-04-28
1:52.268Jeff Jorgenson · fastest of 2
1:51.129Jeff Jorgenson · fastest of 2
1:44.060Vince Balch · fastest of 8 · top 5 within 18.6s
2:01.122Mike Miserendino · fastest of 7 · top 5 within 1.8s
+9.993squal -8.208s
109.0%qual 92.7%
2:05.538John Bower · fastest of 4 · top 4 within 7.0s
2:06.195Bill Okell · fastest of 4 · top 4 within 6.1s
+15.066squal +13.270s
113.6%qual 111.8%
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 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.