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BoP Lab / Classes / SPU

SPU vs ITA vs SSM vs BS 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-SpecvsBS×BSpcBSpecC6CFCFCCTACTBCTCCTDEPEPxF5F6F500F1000FAFBFCFEFE 2FE2FFFMFPFRIFVFXGT-1GT-2GT-XGT1GT2GT3GT3UGTAGTLGTXHPIT7vsITA×ITBITCITEITE-OITRITSPP1P2PXS7SMSM SMSESMSE-TSMXSPU×SRFSRF 3SRF3vsSSM×STLSTUSUNT1T2T3T4TTAUnknownHide inactive classes
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: ITA 98.1% of SPU Donald Squirek, Michelin Raceway Road Atlanta SARRC 2020 qualifying

1:301:401:502:002:102:203 rule changes between Voodoo Quartre 2017 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)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)SSM race best at Majors Apr 2016: 1:29.237 (Kevin Kopp)SSM qualifying best at Majors Apr 2016: 1:31.569 (Alan Olson)BS race best at Majors @ Thunderhill: 2:15.714 (Kyle Keenan)BS race best at Voodoo Quartre 2017: 2:06.427 (John Phillips)BS qualifying best at Majors @ Thunderhill: 2:15.069 (Kyle Keenan)BS qualifying best at Voodoo Quartre 2017: 2:06.994 (John Phillips)Thunderhill Raceway Park · Majors @ ThunderhillMajors @ Thunderhill2016Hallett Motor Racing Circuit · Majors Apr 2016Majors Apr2016Summit Point Raceway · Majors Apr 2016Majors Apr2016NOLA Motorsports Park · Voodoo Quartre 2017Voodoo Quartre2017Michelin Raceway Road Atlanta · SARRC 2020SARRC2020
SPUITASSMBSsolid race · dashed qualifying · slower is lower
98%99%100%101%102%3 rule changes between Voodoo Quartre 2017 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)ITA race best at SARRC 2020: 102.3% of SPU's (Donald Squirek)ITA qualifying best at SARRC 2020: 98.1% of SPU's (Donald Squirek)Thunderhill Raceway Park · Majors @ ThunderhillMajors @ Thunderhill2016Hallett Motor Racing Circuit · Majors Apr 2016Majors Apr2016Summit Point Raceway · Majors Apr 2016Majors Apr2016NOLA Motorsports Park · Voodoo Quartre 2017Voodoo Quartre2017Michelin Raceway Road Atlanta · SARRC 2020SARRC2020
SPUITASSMBSsolid 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
EventSPUITASSMBS
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 Sanders1:45.443Donald Squirek · fastest of 3 · top 3 within 7.5s1:46.072Donald Squirek · fastest of 3 · top 3 within 6.9s110.4Donald Squirek+2.359squal -2.007s102.3%qual 98.1%
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
NOLA Motorsports Park Voodoo Quartre 20172017-03-032:06.994John Phillips · fastest of 6 · top 5 within 9.4s2:06.427John Phillips · fastest of 5 · top 5 within 6.9s
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
No rule changes on record between these events
Thunderhill Raceway Park Majors @ Thunderhill2016-04-082:15.069Kyle Keenan · fastest of 22:15.714Kyle Keenan · fastest of 3 · top 3 within 4.8s

By track

TrackEvents Typical % of SPU Best Latest 
Hallett Motor Racing Circuit10 of 1 with SPU
Michelin Raceway Road Atlanta1100.0%100.0%SARRC 2020100.0%SARRC 2020
NOLA Motorsports Park10 of 1 with SPU
Summit Point Raceway10 of 1 with SPU
Thunderhill Raceway Park10 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.