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BoP Lab / Classes / CTC

CTC vs CTB vs SSM vs ITA 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: remove one to add another)
1DASB SpecB-specB-SpecBSBSpcBSpecC6CFCFCCTAvsCTB×CTC×CTDEPEPxF5F6F500F1000FAFBFCFEFE 2FE2FFFMFPFRIFVFXGT-1GT-2GT-XGT1GT2GT3GT3UGTAGTLGTXHPIT7vsITA×ITBITCITEITE-OITRITSPP1P2PXS7SMSM SMSESMSE-TSMXSPUSRFSRF 3SRF3vsSSM×STLSTUSUNT1T2T3T4TTAUnknownHide inactive classes
Reference · what % is measured against
Tracks · untick to narrow
1:301:351:401:451:503 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)CTB race best at Majors @ Pacific Raceway: 1:38.292 (Greg Fordahl)SSM race best at Majors Apr 2016: 1:29.237 (Kevin Kopp)SSM qualifying best at Majors Apr 2016: 1:31.569 (Alan Olson)ITA race best at SARRC 2020: 1:46.072 (Donald Squirek)ITA qualifying best at Majors Apr 2016: 1:30.560 (Don Wiseman)ITA qualifying best at SARRC 2020: 1:45.443 (Donald Squirek)Hallett Motor Racing Circuit · Majors Apr 2016Majors Apr2016Summit Point Raceway · Majors Apr 2016Majors Apr2016Pacific Raceways · Majors @ Pacific RacewayMajors @ Pacific Raceway2016Michelin Raceway Road Atlanta · SARRC 2020SARRC2020
CTCCTBSSMITAsolid race · dashed qualifying · slower is lower
92%94%96%98%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)CTB race best at Majors @ Pacific Raceway: 91.7% of CTC's (Greg Fordahl)Hallett Motor Racing Circuit · Majors Apr 2016Majors Apr2016Summit Point Raceway · Majors Apr 2016Majors Apr2016Pacific Raceways · Majors @ Pacific RacewayMajors @ Pacific Raceway2016Michelin Raceway Road Atlanta · SARRC 2020SARRC2020
CTCCTBSSMITAsolid 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
EventCTCCTBSSMITA
Qual best Race best Trap Qual best Race best Trap vs CTC % of CTC Qual best Race best Trap vs CTC % of CTC Qual best Race best Trap vs CTC % of CTC 
Michelin Raceway Road Atlanta SARRC 20202020-07-251:45.443Donald Squirek · fastest of 3 · top 3 within 7.5s1:46.072Donald Squirek · fastest of 3 · top 3 within 6.9s110.4Donald Squirek
3 rule changes (ITA: 3)1 induction · 1 tyres & wheels · 1 weightshowhide
  • ITA Cleanup 4.f Traction control #28609tyres & wheels
  • ITA Request clarification 1999 Ford Escort ZX2 S?R #26966weight -45 lbs
  • ITA 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 car1:38.292Greg Fordahl · only car-8.875s91.7%
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
No rule changes on record between these events
Hallett Motor Racing Circuit Majors Apr 20162016-04-091:30.560Don Wiseman · only car

By track

TrackEvents Typical % of CTC Best Latest 
Hallett Motor Racing Circuit10 of 1 with CTC
Michelin Raceway Road Atlanta10 of 1 with CTC
Pacific Raceways1100.0%100.0%Majors @ Pacific Raceway100.0%Majors @ Pacific Raceway
Summit Point Raceway10 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.