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BoP Lab / Classes / CF

CF vs FRI vs SSM vs ITA 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-SpecB-SPECBSBSpcBSpecC6CF×CFCCTACTBCTCCTDEPEPxF5F6F500F600F1000FAFBFCFEFE 2FE2FFFMFPvsFRI×FSFVFXGT-1GT-2GT-XGT1GT1WGT2GT3GT3UGTAGTLGTXHPIT7vsITA×ITBITCITEITE-OITRITSPP1P2PXRSRS7SMSM SMSESMSE-TSMXSPUSRFSRF 3SRF3vsSSM×STLSTUSUNT1T1WT2T3T4TTAUnknownHide 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

1:301:401:502:002:103 rule changes between Majors May 2016 and SARRC 20203 ▾12 rule changes between SARRC 2020 and Palm Tree Winter 202612 ▾1 rule change between Palm Tree Winter 2026 and Majors Apr 20261 ▾CF race best at Majors May 2016: 1:37.406 (David Loken)CF race best at Colorado Home Heroes Grand Prix 2026: 1:37.686 (Levi Zeidlhack)CF race best at Southeast SARRC 2026: 1:26.210 (W. L. Manofsky)CF race best at Colorado Freedom Sprints 2026: 1:57.321 (Levi Zeidlhack)CF race best at Last Chance 2026: 1:54.780 (Levi Zeidlhack)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 race best at Majors Apr 2026: 2:11.606 (Abmed Shmara)ITA race best at Southeast 2026: 1:51.273 (Steffen Clark)ITA race best at Southeast SARRC 2026: 1:27.922 (Roger Heaton)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 2016MA2016Summit Point Raceway · Majors Apr 2016MA2016Pueblo Motorsports Park · Majors May 2016MM2016Michelin Raceway Road Atlanta · SARRC 2020S2020Homestead-Miami Speedway · Palm Tree Winter 2026PTW2026Thunderhill Raceway Park · Majors Apr 2026MA2026Carolina Motorsports Park · Southeast 2026S2026Pueblo Motorsports Park · Colorado Home Heroes Grand Prix 2026CHHGP2026Roebling Road · Southeast SARRC 2026SS2026High Plains Raceway · Colorado Freedom Sprints 2026CFS2026High Plains Raceway · Last Chance 2026LC2026
CFFRISSMITAsolid race · dashed qualifying · slower is lower
100%100.5%101%101.5%102%3 rule changes between Majors May 2016 and SARRC 20203 ▾12 rule changes between SARRC 2020 and Palm Tree Winter 202612 ▾1 rule change between Palm Tree Winter 2026 and Majors Apr 20261 ▾CF race best at Majors May 2016: 100.0% of CF's (David Loken)CF race best at Colorado Home Heroes Grand Prix 2026: 100.0% of CF's (Levi Zeidlhack)CF race best at Southeast SARRC 2026: 100.0% of CF's (W. L. Manofsky)CF race best at Colorado Freedom Sprints 2026: 100.0% of CF's (Levi Zeidlhack)CF race best at Last Chance 2026: 100.0% of CF's (Levi Zeidlhack)ITA race best at Southeast SARRC 2026: 102.0% of CF's (Roger Heaton)Hallett Motor Racing Circuit · Majors Apr 2016MA2016Summit Point Raceway · Majors Apr 2016MA2016Pueblo Motorsports Park · Majors May 2016MM2016Michelin Raceway Road Atlanta · SARRC 2020S2020Homestead-Miami Speedway · Palm Tree Winter 2026PTW2026Thunderhill Raceway Park · Majors Apr 2026MA2026Carolina Motorsports Park · Southeast 2026S2026Pueblo Motorsports Park · Colorado Home Heroes Grand Prix 2026CHHGP2026Roebling Road · Southeast SARRC 2026SS2026High Plains Raceway · Colorado Freedom Sprints 2026CFS2026High Plains Raceway · Last Chance 2026LC2026
CFFRISSMITAsolid 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
EventCFFRISSMITA
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 
High Plains Raceway Last Chance 2026results only2026-08-221:54.780Levi Zeidlhack · fastest of 2-2.541s (-2.17%)
No rule changes on record between these events
High Plains Raceway Colorado Freedom Sprints 2026results only2026-07-041:57.321Levi Zeidlhack · fastest of 2
No rule changes on record between these events
Roebling Road Southeast SARRC 2026results only2026-06-271:26.210W. L. Manofsky · only car1:27.922Roger Heaton · only car+1.712s102.0%
No rule changes on record between these events
Pueblo Motorsports Park Colorado Home Heroes Grand Prix 2026results only2026-05-231:37.686Levi Zeidlhack · fastest of 3 · top 3 within 7.2s+0.280s (+0.29%)
No rule changes on record between these events
Carolina Motorsports Park Southeast 2026results only2026-05-231:51.273Steffen Clark · fastest of 2
No rule changes on record between these events
Thunderhill Raceway Park Majors Apr 2026results only2026-04-252:11.606Abmed Shmara · fastest of 8 · top 5 within 1.4s
1 rule change (ITA: 1)1 inductionshowhide
  • ITA E&O: Turbo Cars in IT #39691induction
Homestead-Miami Speedway Palm Tree Winter 2026results only2026-01-02
12 rule changes (ITA: 12)7 cars added · 1 engine · 1 weight · 1 wording · 2 othershowhide
  • ITA Change 90-93 Miata Diff Housing Upgrade Wording in Notes #38965wording
  • ITA Allow NA Miata to Upgrade to NB Miata Rear Suspension Uprights #38478other
  • ITA 1998-2002 Honda Accord 2.3L #38075cars added
  • ITA 90-93 Miatas to use 94-97 Differential Allowance In #35989other
  • ITA Battery Change #35854weight
  • ITA Request to Classify Chevrolet Beretta #35163cars added
  • ITA Spec LIne Error #33130cars added
  • ITA Request for Porsche 924S Reclassification to ITA #32441cars added
  • ITA Request to Move 83-88 Porsche 944 to ITA #30376cars added
  • ITA Request 2nd Generation Camry to ITB #30007cars added
  • ITA Request to clarify ITA Civic Si 92-95 #28868engine
  • ITA Request to classify a 2003 Honda Accord #28898cars added
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
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
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 CF Best Latest 
High Plains Raceway2100.0%100.0%Colorado Freedom Sprints 2026100.0%Last Chance 2026
Pueblo Motorsports Park2100.0%100.0%Majors May 2016100.0%Colorado Home Heroes Grand Prix 2026
Carolina Motorsports Park10 of 1 with CF
Hallett Motor Racing Circuit10 of 1 with CF
Homestead-Miami Speedway10 of 1 with CF
Michelin Raceway Road Atlanta10 of 1 with CF
Roebling Road1100.0%100.0%Southeast SARRC 2026100.0%Southeast SARRC 2026
Summit Point Raceway10 of 1 with CF
Thunderhill Raceway Park10 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.