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BoP Lab / Classes / SPU

SPU vs TTA vs SSM vs IT7 pace at every track

Lap times across years say as much about the weather as the class. % of SPU is each class's best lap as a share of SPU'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-SpecBSBSpcBSpecC6CFCFCCTACTBCTCCTDEPEPxF5F6F500F1000FAFBFCFEFE 2FE2FFFMFPFRIFVFXGT-1GT-2GT-XGT1GT2GT3GT3UGTAGTLGTXHPvsIT7×ITAITBITCITEITE-OITRITSPP1P2PXS7SMSM SMSESMSE-TSMXSPU×SRFSRF 3SRF3vsSSM×STLSTUSUNT1T2T3T4vsTTA×UnknownHide inactive classes
Reference · what % is measured against
Tracks · untick to narrow
1:101:201:301:401:503 rule changes between Majors @ Pacific Raceway and SARRC 20203 ▾SPU race best at SARRC 2020: 1:43.713 (Ricky Sanders)SPU qualifying best at SARRC 2020: 1:47.450 (Randy Hutchings)TTA race best at Majors @ Pacific Raceway: 1:46.900 (Darren Glaser)TTA qualifying best at Majors @ Pacific Raceway: 1:45.779 (Darren Glaser)SSM race best at Majors Apr 2016: 1:29.237 (Kevin Kopp)SSM qualifying best at Majors Apr 2016: 1:31.569 (Alan Olson)IT7 race best at Majors May 2016: 1:18.431 (Bill Meyer)IT7 race best at SARRC 2020: 1:53.468 (Alan Faver)IT7 qualifying best at Majors May 2016: 1:13.416 (Steven Burkett)IT7 qualifying best at SARRC 2020: 1:50.830 (Alan Faver)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
SPUTTASSMIT7solid race · dashed qualifying · slower is lower
100%102%104%106%108%110%3 rule changes between Majors @ Pacific Raceway and SARRC 20203 ▾SPU race best at SARRC 2020: 100.0% of SPU's (Ricky Sanders)SPU qualifying best at SARRC 2020: 100.0% of SPU's (Randy Hutchings)IT7 race best at SARRC 2020: 109.4% of SPU's (Alan Faver)IT7 qualifying best at SARRC 2020: 103.1% of SPU's (Alan Faver)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
SPUTTASSMIT7solid race · dashed qualifying · each class's best lap as a share of SPU's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventSPUTTASSMIT7
Qual best Race best Trap Qual best Race best Trap vs SPU % of SPU Qual best Race best Trap vs SPU % of SPU Qual best Race best Trap vs SPU % of SPU 
Michelin Raceway Road Atlanta SARRC 20202020-07-251:47.450Randy Hutchings · only car1:43.713Ricky Sanders · fastest of 2119.9Ricky Sanders1:50.830Alan Faver · fastest of 21:53.468Alan Faver · fastest of 2106.4Martin Reiter+9.755squal +3.380s109.4%qual 103.1%
3 rule changes (IT7: 3)1 induction · 1 tyres & wheels · 1 weightshowhide
  • IT7 Cleanup 4.f Traction control #28609tyres & wheels
  • IT7 Request clarification 1999 Ford Escort ZX2 S?R #26966weight -45 lbs
  • IT7 Request clarification on 9.1.3 D1.A.2 #26237induction
Pacific Raceways Majors @ Pacific Raceway2016-05-281:45.779Darren Glaser · only car1:46.900Darren Glaser · only car
No rule changes on record between these events
Circuit of St. Louis (formerly Gateway Motorsports Majors May 20162016-05-141:13.416Steven Burkett · fastest of 21:18.431Bill Meyer · 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 SPU Best Latest 
Circuit of St. Louis (formerly Gateway Motorsports10 of 1 with SPU
Michelin Raceway Road Atlanta1100.0%100.0%SARRC 2020100.0%SARRC 2020
Pacific Raceways10 of 1 with SPU
Summit Point Raceway10 of 1 with SPU
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 SPU'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.