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BoP Lab / Classes / SSM

SSM vs IT7 vs SMSE vs SRF 3 pace at every track

Lap times across years say as much about the weather as the class. % of SSM is each class's best lap as a share of SSM'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)
ASB-SpecEPF600FAFCFE2FFFPFVFXGT1GT2GTXHPvsIT7×PP2SMvsSMSE×SMXvsSRF 3×SRF3SSM×STLSTUT1T2T3T4Show 49 inactive classes
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: SSM 100.0% of SSM Kevin Kopp, Summit Point Raceway Majors Apr 2016 race

1:201:402:003 rule changes between Majors May 2016 and SARRC 20203 ▾2 rule changes between SARRC 2020 and Palm Tree Winter 20262 ▾1 rule change between Palm Tree Winter 2026 and Southeast SARRC 20261 ▾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 race best at Southeast SARRC 2026: 1:28.563 (Evan Hexter)IT7 qualifying best at Majors May 2016: 1:13.416 (Steven Burkett)IT7 qualifying best at SARRC 2020: 1:50.830 (Alan Faver)SMSE race best at SARRC 2020: 1:48.433 (Frederick Baker)SMSE qualifying best at SARRC 2020: 1:47.184 (Frederick Baker)SRF 3 qualifying best at Majors May 2016: 2:06.800 (Scott Rettich)Summit Point Raceway · Majors Apr 2016Majors Apr2016Circuit of St. Louis (formerly Gateway Motorsports · Majors May 2016Majors May2016Pittsburgh International Race Complex · Majors May 2016Majors May2016Michelin Raceway Road Atlanta · SARRC 2020SARRC2020Homestead-Miami Speedway · Palm Tree Winter 2026Palm Tree Winter2026Roebling Road · Southeast SARRC 2026Southeast SARRC2026
SSMIT7SMSESRF 3solid race · dashed qualifying · slower is lower
100%3 rule changes between Majors May 2016 and SARRC 20203 ▾2 rule changes between SARRC 2020 and Palm Tree Winter 20262 ▾1 rule change between Palm Tree Winter 2026 and Southeast SARRC 20261 ▾SSM race best at Majors Apr 2016: 100.0% of SSM's (Kevin Kopp)SSM qualifying best at Majors Apr 2016: 100.0% of SSM's (Alan Olson)Summit Point Raceway · Majors Apr 2016Majors Apr2016Circuit of St. Louis (formerly Gateway Motorsports · Majors May 2016Majors May2016Pittsburgh International Race Complex · Majors May 2016Majors May2016Michelin Raceway Road Atlanta · SARRC 2020SARRC2020Homestead-Miami Speedway · Palm Tree Winter 2026Palm Tree Winter2026Roebling Road · Southeast SARRC 2026Southeast SARRC2026
SSMIT7SMSESRF 3solid race · dashed qualifying · each class's best lap as a share of SSM's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventSSMIT7SMSESRF 3
Qual best Race best Trap Qual best Race best Trap vs SSM % of SSM Qual best Race best Trap vs SSM % of SSM Qual best Race best Trap vs SSM % of SSM 
Roebling Road Southeast SARRC 2026results only2026-06-271:28.563Evan Hexter · fastest of 3 · top 3 within 3.3s
1 rule change (IT7: 1)1 inductionshowhide
  • IT7 E&O: Turbo Cars in IT #39691induction
Homestead-Miami Speedway Palm Tree Winter 2026results only2026-01-02
2 rule changes (IT7: 2)1 cars added · 1 weightshowhide
  • IT7 Battery Change #35854weight
  • IT7 Request to classify a 2003 Honda Accord #28898cars added
Michelin Raceway Road Atlanta SARRC 20202020-07-251:50.830Alan Faver · fastest of 21:53.468Alan Faver · fastest of 2106.4Martin Reiter1:47.184Frederick Baker · fastest of 4 · top 4 within 4.9s1:48.433Frederick Baker · fastest of 4 · top 4 within 6.3s107.4Ken Steagall
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
Pittsburgh International Race Complex Majors May 20162016-05-142:06.800Scott Rettich · fastest of 13 · top 5 within 4.5s
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 SSM Best Latest 
Circuit of St. Louis (formerly Gateway Motorsports10 of 1 with SSM
Homestead-Miami Speedway10 of 1 with SSM
Michelin Raceway Road Atlanta10 of 1 with SSM
Pittsburgh International Race Complex10 of 1 with SSM
Roebling Road10 of 1 with SSM
Summit Point Raceway1100.0%100.0%Majors Apr 2016100.0%Majors Apr 2016
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 SSM'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.