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BoP Lab / Classes / TTA

TTA vs ITB vs SSM vs CTD pace at every track

Lap times across years say as much about the weather as the class. % of TTA is each class's best lap as a share of TTA'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-SpecBSBSpcBSpecC6CFCFCCTACTBCTCvsCTD×EPEPxF5F6F500F1000FAFBFCFEFE 2FE2FFFMFPFRIFVFXGT-1GT-2GT-XGT1GT2GT3GT3UGTAGTLGTXHPIT7ITAvsITB×ITCITEITE-OITRITSPP1P2PXS7SMSM SMSESMSE-TSMXSPUSRFSRF 3SRF3vsSSM×STLSTUSUNT1T2T3T4TTA×UnknownHide inactive classes
Reference · what % is measured against
Tracks · untick to narrow
1:101:201:301:401:502:005 rule changes between Majors @ Pacific Raceway and SARRC 20205 ▾TTA race best at Majors @ Pacific Raceway: 1:46.900 (Darren Glaser)TTA qualifying best at Majors @ Pacific Raceway: 1:45.779 (Darren Glaser)ITB race best at Majors May 2016: 1:15.234 (James Stevens)ITB race best at SARRC 2020: 2:00.725 (Ron Fuller)ITB qualifying best at Majors May 2016: 1:14.498 (James Stevens)ITB qualifying best at SARRC 2020: 1:59.654 (Ron Fuller)SSM race best at Majors Apr 2016: 1:29.237 (Kevin Kopp)SSM qualifying best at Majors Apr 2016: 1:31.569 (Alan Olson)CTD qualifying best at Majors @ Pacific Raceway: 1:49.215 (Rick Shaw)Summit Point Raceway · Majors Apr 2016Majors Apr2016Circuit of St. Louis (formerly Gateway Motorsports · Majors May 2016Majors May2016Pacific Raceways · Majors @ Pacific RacewayMajors @ Pacific Raceway2016Michelin Raceway Road Atlanta · SARRC 2020SARRC2020
TTAITBSSMCTDsolid race · dashed qualifying · slower is lower
100%101%102%103%5 rule changes between Majors @ Pacific Raceway and SARRC 20205 ▾TTA race best at Majors @ Pacific Raceway: 100.0% of TTA's (Darren Glaser)TTA qualifying best at Majors @ Pacific Raceway: 100.0% of TTA's (Darren Glaser)CTD qualifying best at Majors @ Pacific Raceway: 103.2% of TTA's (Rick Shaw)Summit Point Raceway · Majors Apr 2016Majors Apr2016Circuit of St. Louis (formerly Gateway Motorsports · Majors May 2016Majors May2016Pacific Raceways · Majors @ Pacific RacewayMajors @ Pacific Raceway2016Michelin Raceway Road Atlanta · SARRC 2020SARRC2020
TTAITBSSMCTDsolid race · dashed qualifying · each class's best lap as a share of TTA's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventTTAITBSSMCTD
Qual best Race best Trap Qual best Race best Trap vs TTA % of TTA Qual best Race best Trap vs TTA % of TTA Qual best Race best Trap vs TTA % of TTA 
Michelin Raceway Road Atlanta SARRC 20202020-07-251:59.654Ron Fuller · only car2:00.725Ron Fuller · only car98.0Ron Fuller
5 rule changes (ITB: 5)2 weight · 1 cars added · 1 induction · 1 tyres & wheelsshowhide
  • ITB Cleanup 4.f Traction control #28609tyres & wheels
  • ITB Request clarification 1999 Ford Escort ZX2 S?R #26966weight -45 lbs
  • ITB Request to allow 07-11 Mini in ITB as BPSEC configuration #26997weight
  • ITB Request clarification on 9.1.3 D1.A.2 #26237induction
  • ITB Request to Dual-Class Honda Fit and B-Spec Cars Into ITC and #25347cars added
Pacific Raceways Majors @ Pacific Raceway2016-05-281:45.779Darren Glaser · only car1:46.900Darren Glaser · only car1:49.215Rick Shaw · fastest of 2+3.436s qual103.2% qual
No rule changes on record between these events
Circuit of St. Louis (formerly Gateway Motorsports Majors May 20162016-05-141:14.498James Stevens · fastest of 3 · top 3 within 4.4s1:15.234James Stevens · fastest of 3 · top 3 within 2.1s
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 TTA Best Latest 
Circuit of St. Louis (formerly Gateway Motorsports10 of 1 with TTA
Michelin Raceway Road Atlanta10 of 1 with TTA
Pacific Raceways1100.0%100.0%Majors @ Pacific Raceway100.0%Majors @ Pacific Raceway
Summit Point Raceway10 of 1 with TTA
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 TTA'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.