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BoP Lab / Classes / CTD

CTD vs BS vs SSM vs SRF 3 pace at every track

Lap times across years say as much about the weather as the class. % of CTD is each class's best lap as a share of CTD'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×BSpcBSpecC6CFCFCCTACTBCTCCTD×EPEPxF5F6F500F1000FAFBFCFEFE 2FE2FFFMFPFRIFVFXGT-1GT-2GT-XGT1GT2GT3GT3UGTAGTLGTXHPIT7ITAITBITCITEITE-OITRITSPP1P2PXS7SMSM SMSESMSE-TSMXSPUSRFvsSRF 3×SRF3vsSSM×STLSTUSUNT1T2T3T4TTAUnknownHide inactive classes
Reference · what % is measured against
Tracks · untick to narrow
1:301:401:502:002:102:20CTD qualifying best at Majors @ Pacific Raceway: 1:49.215 (Rick Shaw)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)SSM race best at Majors Apr 2016: 1:29.237 (Kevin Kopp)SSM qualifying best at Majors Apr 2016: 1:31.569 (Alan Olson)SRF 3 qualifying best at Majors May 2016: 2:06.800 (Scott Rettich)Thunderhill Raceway Park · Majors @ ThunderhillMajors @ Thunderhill2016Summit Point Raceway · Majors Apr 2016Majors Apr2016Pittsburgh International Race Complex · Majors May 2016Majors May2016Pacific Raceways · Majors @ Pacific RacewayMajors @ Pacific Raceway2016NOLA Motorsports Park · Voodoo Quartre 2017Voodoo Quartre2017
CTDBSSSMSRF 3solid race · dashed qualifying · slower is lower
100%CTD qualifying best at Majors @ Pacific Raceway: 100.0% of CTD's (Rick Shaw)Thunderhill Raceway Park · Majors @ ThunderhillMajors @ Thunderhill2016Summit Point Raceway · Majors Apr 2016Majors Apr2016Pittsburgh International Race Complex · Majors May 2016Majors May2016Pacific Raceways · Majors @ Pacific RacewayMajors @ Pacific Raceway2016NOLA Motorsports Park · Voodoo Quartre 2017Voodoo Quartre2017
CTDBSSSMSRF 3solid race · dashed qualifying · each class's best lap as a share of CTD's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventCTDBSSSMSRF 3
Qual best Race best Trap Qual best Race best Trap vs CTD % of CTD Qual best Race best Trap vs CTD % of CTD Qual best Race best Trap vs CTD % of CTD 
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
Pacific Raceways Majors @ Pacific Raceway2016-05-281:49.215Rick Shaw · fastest of 2
No rule changes on record between these events
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
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
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 CTD Best Latest 
NOLA Motorsports Park10 of 1 with CTD
Pacific Raceways1100.0%100.0%Majors @ Pacific Raceway100.0%Majors @ Pacific Raceway
Pittsburgh International Race Complex10 of 1 with CTD
Summit Point Raceway10 of 1 with CTD
Thunderhill Raceway Park10 of 1 with CTD
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 CTD'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.