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BoP Lab / Classes / CTC

CTC vs ITC vs SSM 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 -SPE C+B Spec+B-spec+B-Spec+B-SPEC+B-SPEC 3+B-SPEC 9+B-SPEC 11+B-SPEC 12+B-SPEC 18+B-SPEC 19+B-SPEC 61+BS+BSpc+BSpec+C6+CF+CFC+CTA+CTB+CTC×CTD+E1 16+E1 43+E1 52+E3 0+E3 2+E3 6+E3 46+E3 101 T+E3 146+E4 19+E4 85+E4 145 T+E4 192+E4 192 P+EP+EP 177+EPx+EX 5+EX 7+EX 36+EX 78+EX 146+F5+F6+F500+F600+F1000+FA+FB+FC+FC 46+FC 85+FE+FE 2+FE2+FF+FF 7+FF 32+FFTS+FM+FP+FP 73+FP 91+FRI+FS+FV+FV 04+FV 4+FV 17+FV 17 #+FV 29+FV 43+FV 49+FV 96+FX+GT-1+GT-2+GT-X+GT1+GT1 6+GT1 6 P+GT1W+GT2+GT2 09+GT2 9+GT2 13+GT2 19+GT2 27+GT2 29+GT2 42+GT2 42 P+GT2 106+GT3+GT3U+GTA+GTL+GTX+GTX #+GTX 178+GTX 190+GTX 190 #+GTX 190 #P+HP+IT7+ITA+ITB+vsITC×ITE+ITE - O+ITE - U+ITE-O+ITJ+ITR+ITS+ITX+MC+P+P1+P2+P2 88+PX+RSR+S7+SM+SM +SM 3+SM 3 #+SM 8+SM 14+SM 18+SM 18 #+SM 29+SM 34+SM 35+SM 40+SM 44+SM 62+SM 72+SM 88+SM 93+SM 95+SM 95 T+SM 132+SM 157+SM 160+SM 166+SMSE+SMSE-T+SMT+SMX+SP+SPM+SPO+SPU+SRF+SRF 3+SRF3+SRF3 0+SRF3 00+SRF3 01+SRF3 9+SRF3 11+SRF3 20+SRF3 26+SRF3 29+SRF3 42+SRF3 60+SRF3 62+SRF3 66+SRF3 68+SRF3 113+SRFH+vsSSM×STL+STL 16+STL 37+STL 79+STU+STU 23+SUN+T1+T1 07+T1 48+T1W+T2+T2 03+T2 03 P+T2 43+T3+T3 8+T3 28+T3 39+T3 72+T4+T4 50+T4 89+T4 166+T4 171+TTA+Unknown+Hide inactive classes
Reference · what % is measured against
Tracks · untick to narrow
1:201:402:002:2012 rule changes between Majors @ Pacific Raceway and Majors Apr 202612 ▾CTC race best at Majors @ Pacific Raceway: 1:47.167 (William Hendrickson)CTC qualifying best at Majors @ Pacific Raceway: 1:48.686 (William Hendrickson)ITC race best at Majors May 2016: 1:23.496 (Edward Nicholson)ITC race best at Southeast SARRC 2026: 1:35.757 (Mark Brackett)ITC qualifying best at Majors May 2016: 1:26.060 (Edward Nicholson)SSM race best at Majors Apr 2016: 1:29.237 (Kevin Kopp)SSM race best at Majors Apr 2026: 2:16.441 (James Powell)SSM qualifying best at Majors Apr 2016: 1:31.569 (Alan Olson)Summit Point Raceway · Majors Apr 2016Majors Apr2016Circuit of St. Louis (formerly Gateway Motorsports · Majors May 2016Majors May2016Pacific Raceways · Majors @ Pacific RacewayMajors @ Pacific Raceway2016Thunderhill Raceway Park · Majors Apr 2026Majors Apr2026Roebling Road · Southeast SARRC 2026Southeast SARRC2026
CTCITCSSMsolid race · dashed qualifying · slower is lower
100%12 rule changes between Majors @ Pacific Raceway and Majors Apr 202612 ▾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)Summit Point Raceway · Majors Apr 2016Majors Apr2016Circuit of St. Louis (formerly Gateway Motorsports · Majors May 2016Majors May2016Pacific Raceways · Majors @ Pacific RacewayMajors @ Pacific Raceway2016Thunderhill Raceway Park · Majors Apr 2026Majors Apr2026Roebling Road · Southeast SARRC 2026Southeast SARRC2026
CTCITCSSMsolid 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
EventCTCITCSSM
Qual best Race best Trap Qual best Race best Trap vs CTC % of CTC Qual best Race best Trap vs CTC % of CTC 
Roebling Road Southeast SARRC 2026results only2026-06-271:35.757Mark Brackett · only car
No rule changes on record between these events
Thunderhill Raceway Park Majors Apr 2026results only2026-04-252:16.441James Powell · fastest of 2
12 rule changes (ITC: 12)4 cars added · 3 weight · 2 induction · 1 engine · 1 tyres & wheels · 1 othershowhide
  • ITC E&O: Turbo Cars in IT #39691induction
  • ITC Requesting Classification of Chevrolet Spark #37834cars added
  • ITC Battery Change #35854weight
  • ITC ABS Weight Penalty for ITC #32696weight
  • ITC Volkswagen New Beetle #31842other
  • ITC Request Spec Line for Mazda 2 in ITC #31289cars added
  • ITC 9.1.3. ITC Spec Line for Honda CRX 1.5 (84-87) Bodywork #30672engine
  • ITC Request to classify a 2003 Honda Accord #28898cars added
  • ITC Cleanup 4.f Traction control #28609tyres & wheels
  • ITC Request clarification 1999 Ford Escort ZX2 S?R #26966weight -45 lbs
  • ITC Request clarification on 9.1.3 D1.A.2 #26237induction
  • ITC Request to Dual-Class Honda Fit and B-Spec Cars Into ITC and #25347cars added
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 20162016-05-141:26.060Edward Nicholson · only car1:23.496Edward Nicholson · only car
No rule changes on record between these events
Summit Point Raceway Majors Apr 20162016-04-291:31.569Alan Olson · fastest of 26 · top 5 within 1.9s1:29.237Kevin Kopp · fastest of 27 · top 5 within 0.3s

By track

TrackEvents Typical % of CTC Best Latest 
Circuit of St. Louis (formerly Gateway Motorsports10 of 1 with CTC
Pacific Raceways1100.0%100.0%Majors @ Pacific Raceway100.0%Majors @ Pacific Raceway
Roebling Road10 of 1 with CTC
Summit Point Raceway10 of 1 with CTC
Thunderhill Raceway Park10 of 1 with CTC
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.