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ITB vs SMSE pace at every track

Lap times across years say as much about the weather as the class. % of ITB is each class's best lap as a share of ITB'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.

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AS+B-Spec+EP+FA+FC+FE2+FF+FP+FV+FX+GT1+GT2+GTX+HP+ITB×P+P2+SM+vsSMSE×SMX+SRF3+STL+STU+T1+T2+T3+T4+Show 49 inactive classes
Reference · what % is measured against
Tracks · untick to narrow

Closest to the field: ITB 100.0% of ITB James Stevens, Circuit of St. Louis (formerly Gateway Motorsports Majors May 2016 race · SMSE 89.6% of ITB Frederick Baker, Michelin Raceway Road Atlanta SARRC 2020 qualifying

1:101:201:301:401:502:005 rule changes between Majors May 2016 and SARRC 20205 ▾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)SMSE race best at SARRC 2020: 1:48.433 (Frederick Baker)SMSE qualifying best at SARRC 2020: 1:47.184 (Frederick Baker)Circuit of St. Louis (formerly Gateway Motorsports · Majors May 2016Majors May2016Michelin Raceway Road Atlanta · SARRC 2020SARRC2020
ITBSMSEsolid race · dashed qualifying · slower is lower
90%92%94%96%98%100%5 rule changes between Majors May 2016 and SARRC 20205 ▾ITB race best at Majors May 2016: 100.0% of ITB's (James Stevens)ITB race best at SARRC 2020: 100.0% of ITB's (Ron Fuller)ITB qualifying best at Majors May 2016: 100.0% of ITB's (James Stevens)ITB qualifying best at SARRC 2020: 100.0% of ITB's (Ron Fuller)SMSE race best at SARRC 2020: 89.8% of ITB's (Frederick Baker)SMSE qualifying best at SARRC 2020: 89.6% of ITB's (Frederick Baker)Circuit of St. Louis (formerly Gateway Motorsports · Majors May 2016Majors May2016Michelin Raceway Road Atlanta · SARRC 2020SARRC2020
ITBSMSEsolid race · dashed qualifying · each class's best lap as a share of ITB's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventITBSMSE
Qual best Race best Trap Qual best Race best Trap vs ITB % of ITB 
Michelin Raceway Road Atlanta SARRC 20202020-07-251:59.654Ron Fuller · only car2:00.725Ron Fuller · only car98.0Ron Fuller1:47.184Frederick Baker · fastest of 4 · top 4 within 4.9s1:48.433Frederick Baker · fastest of 4 · top 4 within 6.3s107.4Ken Steagall-12.292squal -12.470s89.8%qual 89.6%
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
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

By track

TrackEvents Typical % of ITB Best Latest 
Circuit of St. Louis (formerly Gateway Motorsports1100.0%100.0%Majors May 2016100.0%Majors May 2016
Michelin Raceway Road Atlanta1100.0%100.0%SARRC 2020100.0%SARRC 2020
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 ITB'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.