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BoP Lab / Classes / CF

CF vs ITR vs SSM vs SPU pace at every track

Lap times across years say as much about the weather as the class. % of CF is each class's best lap as a share of CF'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-SpecBSBSpcBSpecC6CF×CFCCTACTBCTCCTDEPEPxF5F6F500F1000FAFBFCFEFE 2FE2FFFMFPFRIFVFXGT-1GT-2GT-XGT1GT2GT3GT3UGTAGTLGTXHPIT7ITAITBITCITEITE-OvsITR×ITSPP1P2PXS7SMSM SMSESMSE-TSMXvsSPU×SRFSRF 3SRF3vsSSM×STLSTUSUNT1T2T3T4TTAUnknownHide inactive classes
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: CF 100.0% of CF David Loken, Pueblo Motorsports Park Majors May 2016 race

1:101:201:301:401:506 rule changes between Majors May 2016 and SARRC 20206 ▾CF race best at Majors May 2016: 1:37.406 (David Loken)ITR race best at Majors May 2016: 1:13.673 (Robert G Wright)ITR qualifying best at Majors May 2016: 1:12.883 (Robert G. Wright)SSM race best at Majors Apr 2016: 1:29.237 (Kevin Kopp)SSM qualifying best at Majors Apr 2016: 1:31.569 (Alan Olson)SPU race best at SARRC 2020: 1:43.713 (Ricky Sanders)SPU qualifying best at SARRC 2020: 1:47.450 (Randy Hutchings)Summit Point Raceway · Majors Apr 2016Majors Apr2016Circuit of St. Louis (formerly Gateway Motorsports · Majors May 2016Majors May2016Pueblo Motorsports Park · Majors May 2016Majors May2016Michelin Raceway Road Atlanta · SARRC 2020SARRC2020
CFITRSSMSPUsolid race · dashed qualifying · slower is lower
100%6 rule changes between Majors May 2016 and SARRC 20206 ▾CF race best at Majors May 2016: 100.0% of CF's (David Loken)Summit Point Raceway · Majors Apr 2016Majors Apr2016Circuit of St. Louis (formerly Gateway Motorsports · Majors May 2016Majors May2016Pueblo Motorsports Park · Majors May 2016Majors May2016Michelin Raceway Road Atlanta · SARRC 2020SARRC2020
CFITRSSMSPUsolid race · dashed qualifying · each class's best lap as a share of CF's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventCFITRSSMSPU
Qual best Race best Trap Qual best Race best Trap vs CF % of CF Qual best Race best Trap vs CF % of CF Qual best Race best Trap vs CF % of CF 
Michelin Raceway Road Atlanta SARRC 20202020-07-251:47.450Randy Hutchings · only car1:43.713Ricky Sanders · fastest of 2119.9Ricky Sanders
6 rule changes (ITR: 6)2 cars added · 2 weight · 1 induction · 1 tyres & wheelsshowhide
  • ITR Cleanup 4.f Traction control #28609tyres & wheels
  • ITR Request to Classify 2008-2013 BMW 128i #26724cars added
  • ITR Request clarification 1999 Ford Escort ZX2 S?R #26966weight -45 lbs
  • ITR Please Classify the '13-'14 Subaru BRZ/ Scion FRS in IT #27242cars added
  • ITR Request Reduction of Minimum weight for 2000-2003 Honda S2000 #26096weight +20 lbs
  • ITR Request clarification on 9.1.3 D1.A.2 #26237induction
Pueblo Motorsports Park Majors May 20162016-05-281:37.406David Loken · fastest of 10 · top 5 within 2.2s
No rule changes on record between these events
Circuit of St. Louis (formerly Gateway Motorsports Majors May 20162016-05-141:12.883Robert G. Wright · only car1:13.673Robert G Wright · 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 CF Best Latest 
Circuit of St. Louis (formerly Gateway Motorsports10 of 1 with CF
Michelin Raceway Road Atlanta10 of 1 with CF
Pueblo Motorsports Park1100.0%100.0%Majors May 2016100.0%Majors May 2016
Summit Point Raceway10 of 1 with CF
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 CF'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.