BoP Lab / Classes / PX
PX vs FRI vs SSM vs CTC pace at every track
Lap times across years say as much about the weather as the class. % of PX is each class's best lap as a share of PX'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.
| Event | PX | FRI | SSM | CTC | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Qual best | Race best | Trap | Qual best | Race best | Trap | vs PX | % of PX | Qual best | Race best | Trap | vs PX | % of PX | Qual best | Race best | Trap | vs PX | % of PX | |||
| Buttonwillow Raceway Park Super Tour Feb 20222022-02-17 | 1:43.842Dave Tweedlie · only car | 1:44.025Dave Tweedlie · only car-9.156s (-8.09%) | 132.0Dave Tweedlie-1.5 mph (-1.1%) | |||||||||||||||||
| No rule changes on record between these events | ||||||||||||||||||||
| Road America June Sprints 20212021-06-04 | 2:16.070Jim Booth · only car+7.555s (+5.88%) | |||||||||||||||||||
| No rule changes on record between these events | ||||||||||||||||||||
| Virginia International Raceway Super Tour Apr 20212021-04-09 | 2:03.668Jacek Mucha · only car | 1:59.572Jacek Mucha · only car | 168.1Jacek Mucha | |||||||||||||||||
| No rule changes on record between these events | ||||||||||||||||||||
| Michelin Raceway Road Atlanta Super Tour Mar 20212021-03-19 | 1:29.991Jacek Mucha · only car | 1:28.432Jacek Mucha · only car | 171.7Jacek Mucha | |||||||||||||||||
| No rule changes on record between these events | ||||||||||||||||||||
| Buttonwillow Raceway Park Super Tour Feb 20212021-02-19 | 1:53.181Robert Yallen · only car | 133.5Robert Yallen | ||||||||||||||||||
| No rule changes on record between these events | ||||||||||||||||||||
| Road America June Sprints 20202020-06-12 | 2:08.515Judd Miller · fastest of 2 | 2:10.496Judd Miller · fastest of 2 | 166.2Conrad Park | |||||||||||||||||
| No rule changes on record between these events | ||||||||||||||||||||
| Circuit of the Americas Super Tour Feb 20202020-02-07 | 2:11.851Judd Miller · only car | 2:08.836Judd Miller · only car | 162.9Judd Miller | |||||||||||||||||
| No rule changes on record between these events | ||||||||||||||||||||
| Sebring International Raceway Super Tour Jan 20202020-01-10 | 2:11.545Jacek Mucha · only car | 2:11.901Jacek Mucha · only car | 155.9Jacek Mucha | |||||||||||||||||
By track
| Track | Events | Typical % of PX | Best | Latest |
|---|---|---|---|---|
| Buttonwillow Raceway Park | 2 | 100.0% | 100.0%Super Tour Feb 2021 | 100.0%Super Tour Feb 2022 |
| Road America | 2 | 100.0% | 100.0%June Sprints 2020 | 100.0%June Sprints 2021 |
| Circuit of the Americas | 1 | 100.0% | 100.0%Super Tour Feb 2020 | 100.0%Super Tour Feb 2020 |
| Michelin Raceway Road Atlanta | 1 | 100.0% | 100.0%Super Tour Mar 2021 | 100.0%Super Tour Mar 2021 |
| Sebring International Raceway | 1 | 100.0% | 100.0%Super Tour Jan 2020 | 100.0%Super Tour Jan 2020 |
| Virginia International Raceway | 1 | 100.0% | 100.0%Super Tour Apr 2021 | 100.0%Super Tour Apr 2021 |
About this data
Every event the class ran, at any track, oldest to newest on the chart and newest first in the table. Each point is the class's best lap as a share of PX's best on the same day: the weather and the day cancel out, so one figure compares across years where lap times cannot; a class that suits one track more than another still reads differently there. It still moves when the yardstick's own balance changes or its field thins, and an event the yardstick did not run has no point. A best from fewer than three cars is greyed. The rule changes that took effect between two events are folded between their rows.