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BoP Lab / Classes / CTC

CTC vs FRI vs IT7 pace at every track

Lap times across years say as much about the weather as the class. % of CTC is each class's best lap as a share of CTC'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.

Class · click a class to switch, + to compare alongside (up to 4)
1D+AS+B Spec+B-spec+B-Spec+BS+BSpc+BSpec+C6+CF+CFC+CTA+CTB+CTC×CTD+EP+EPx+F5+F6+F500+F1000+FA+FB+FC+FE+FE 2+FE2+FF+FM+FP+vsFRI×FV+FX+GT-1+GT-2+GT-X+GT1+GT2+GT3+GT3U+GTA+GTL+GTX+HP+vsIT7×ITA+ITB+ITC+ITE+ITE-O+ITR+ITS+P+P1+P2+PX+S7+SM+SM +SMSE+SMSE-T+SMX+SPU+SRF+SRF 3+SRF3+SSM+STL+STU+SUN+T1+T2+T3+T4+TTA+Unknown+Hide inactive classes
Reference · what % is measured against
Tracks · untick to narrow
1:101:201:301:401:503 rule changes between Majors @ Pacific Raceway and SARRC 20203 ▾CTC race best at Majors @ Pacific Raceway: 1:47.167 (William Hendrickson)CTC qualifying best at Majors @ Pacific Raceway: 1:48.686 (William Hendrickson)IT7 race best at Majors May 2016: 1:18.431 (Bill Meyer)IT7 race best at SARRC 2020: 1:53.468 (Alan Faver)IT7 qualifying best at Majors May 2016: 1:13.416 (Steven Burkett)IT7 qualifying best at SARRC 2020: 1:50.830 (Alan Faver)Circuit of St. Louis (formerly Gateway Motorsports · Majors May 2016Majors May2016Pacific Raceways · Majors @ Pacific RacewayMajors @ Pacific Raceway2016Michelin Raceway Road Atlanta · SARRC 2020SARRC2020
CTCFRIIT7solid race · dashed qualifying · slower is lower
100%3 rule changes between Majors @ Pacific Raceway and SARRC 20203 ▾CTC race best at Majors @ Pacific Raceway: 100.0% of CTC's (William Hendrickson)CTC qualifying best at Majors @ Pacific Raceway: 100.0% of CTC's (William Hendrickson)Circuit of St. Louis (formerly Gateway Motorsports · Majors May 2016Majors May2016Pacific Raceways · Majors @ Pacific RacewayMajors @ Pacific Raceway2016Michelin Raceway Road Atlanta · SARRC 2020SARRC2020
CTCFRIIT7solid race · dashed qualifying · each class's best lap as a share of CTC's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventCTCFRIIT7
Qual best Race best Trap Qual best Race best Trap vs CTC % of CTC Qual best Race best Trap vs CTC % of CTC 
Michelin Raceway Road Atlanta SARRC 20202020-07-251:50.830Alan Faver · fastest of 21:53.468Alan Faver · fastest of 2106.4Martin Reiter
3 rule changes (IT7: 3)1 induction · 1 tyres & wheels · 1 weightshowhide
  • IT7 Cleanup 4.f Traction control #28609tyres & wheels
  • IT7 Request clarification 1999 Ford Escort ZX2 S?R #26966weight -45 lbs
  • IT7 Request clarification on 9.1.3 D1.A.2 #26237induction
Pacific Raceways Majors @ Pacific Raceway2016-05-281:48.686William Hendrickson · only car1:47.167William Hendrickson · only car
No rule changes on record between these events
Circuit of St. Louis (formerly Gateway Motorsports Majors May 20162016-05-141:13.416Steven Burkett · fastest of 21:18.431Bill Meyer · only car

By track

TrackEvents Typical % of CTC Best Latest 
Circuit of St. Louis (formerly Gateway Motorsports10 of 1 with CTC
Michelin Raceway Road Atlanta10 of 1 with CTC
Pacific Raceways1100.0%100.0%Majors @ Pacific Raceway100.0%Majors @ Pacific Raceway
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 CTC'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.