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BoP Lab / Laguna Seca

SM vs FM vs SRF3 vs AS pace at Laguna Seca

Class · click a class to switch, + to compare alongside (up to 4: remove one to add another)
Reference class · the yardstick the % column and chart are measured against

Quickest here: SM 1:46.110 Tristan Littlehale, Super Tour Jul 2019 race · FM 1:31.060 Bill Weaver, Super Tour Jul 2019 qualifying · SRF3 1:37.644 TJ Acker, Super Tour Jul 2019 qualifying · AS 1:40.712 Clark Nunes, Super Tour Jul 2019 qualifying

EventSMFMSRF3AS
Qual bestRace bestTrapQual bestRace bestTrapvs SM% of SMQual bestRace bestTrapvs SM% of SMQual bestRace bestTrapvs SM% of SM
Super Tour Jul 2019 ST19JUL262019-07-261:46.159Tristan Littlehale · fastest of 11 · top 5 within 1.9s1:46.110Tristan Littlehale · fastest of 11 · top 5 within 1.2s87.0Justin Casey1:31.060Bill Weaver · fastest of 7 · top 5 within 3.0s1:32.101Bill Weaver · fastest of 7 · top 5 within 1.0s109.0Randy Sturgeon-14.009squal -15.099s86.8%qual 85.8%1:37.644TJ Acker · fastest of 25 · top 5 within 0.8s1:38.588Steve Fogg · fastest of 25 · top 5 within 0.7s99.9Mike Miserendino-7.522squal -8.515s92.9%qual 92.0%1:40.712Clark Nunes · fastest of 4 · top 4 within 7.9s1:40.914Clark Nunes · fastest of 4 · top 4 within 8.0s103.0Michael Thompson-5.196squal -5.447s95.1%qual 94.9%
9 earlier rule changes on record, in force before Super Tour Jul 2019 (from 2019)2 aero · 1 cars added · 1 weight · 2 wording · 3 other · SRF drivers may now use Dash Windscreen Kit P/N 1180103 or P/N 180102. · AS Ford Mustang 79-93 non-Cobra drops 100 lbs to 3150; over 313 CID Cobra drops 100 lbs to 3450. · SRF3 multi-piece nose assembly approved for use; no other nose modifications allowed. · SRF3 brakes now accept Hawk Blue 9012 pads P/N 801993 only; Wilwood vented rotor P/N 800065 minimum 13.25mm as delivered; caliper bushings P/N 1196185 A or B permitted. Shock absorbers: Penske P/N 280396 only, sealed, with SCCA bump rubber… · SM fuel pump and filter now permitted as Mazda or OEM equivalent part. · AS adds Spec Mustang SMG classification with 107.1 wheelbase, 3.73 gears, 355mm front and 300mm rear brakes. · SM allows factory Mazda ECU and injector harnesses (P/N 0000-10-020E-99, 0000-10-080D-99) on 1999–2000 model year cars, unmodified. · SM electrical rules reorganized and clarified; alternator now externally regulated only by OEM ECU or master kill switch; harness repair by splicing permitted. · SM tire tread protrusion language removed from GCR 9.1.7.C.5.showhide
  • SRF3 SRF Dash Windscreen Kit #27028aeroadded · aeroSRF drivers may now use Dash Windscreen Kit P/N 1180103 or P/N 180102.
  • AS Request to Revert to 2017 Weights #25885weightfaster · weightAS Ford Mustang 79-93 non-Cobra drops 100 lbs to 3150; over 313 CID Cobra drops 100 lbs to 3450.
  • SRF3 New SRF Sectional Nose Rule Addition #26914aeroadded · aeroSRF3 multi-piece nose assembly approved for use; no other nose modifications allowed.
  • SRF3 SRF Brakes and Shock Rule Changes #26629otherotherSRF3 brakes now accept Hawk Blue 9012 pads P/N 801993 only; Wilwood vented rotor P/N 800065 minimum 13.25mm as delivered; caliper bushings P/N 1196185 A or B permitted. Shock absorbers: Penske P/N 280396 only, sealed, with SCCA bump rubber…
  • SM Request to allow aftermarket fuel filters. #26370otheraddedSM fuel pump and filter now permitted as Mazda or OEM equivalent part.
  • AS SMG Mustang eligibility in American sedan #26224cars addedaddedAS adds Spec Mustang SMG classification with 107.1 wheelbase, 3.73 gears, 355mm front and 300mm rear brakes.
  • SM Request 99-00 replacement Wire harnesses #25602otheraddedSM allows factory Mazda ECU and injector harnesses (P/N 0000-10-020E-99, 0000-10-080D-99) on 1999–2000 model year cars, unmodified.
  • SM Organize and Clarify 9.1.7.C.1.o. #25913wordingwordingSM electrical rules reorganized and clarified; alternator now externally regulated only by OEM ECU or master kill switch; harness repair by splicing permitted.
  • SM Strike Tire Tread Language #26123wordingremovedSM tire tread protrusion language removed from GCR 9.1.7.C.5.
About this data
Best is the class's fastest lap in that event's qualifying or race sessions, with the driver who set it, how many cars set a time that session and how close the top five were; a best from fewer than three cars is greyed. With two or more classes, "vs" is the gap of each class's best to the first class's at the same event. "% of SM" is the class's best as a share of SM's best at the same event (100% is level, less is quicker): weather and track condition move every class together, so this compares across years where the raw times do not. It still breaks when SM's own field changes or one session was wet and another dry. Newest event first. The coloured figure under each value is the change from the previous event that has one (green is quicker, red slower). Whole laps only, so events with different sector layouts still compare. Weather and track condition are not accounted for.