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BoP Lab / Buttonwillow Raceway Park

FM vs F6 vs FB vs SMX pace at Buttonwillow Raceway Park

Class · click a class to switch, + to compare alongside (up to 4: remove one to add another)
Reference class · the others' laps as a share of this one's at the same event, so years compare despite weather; + a class above to measure against it
Track configuration

Quickest here: SMX 1:56.431 Ethan Lampe, Super Tour Feb 2025 qualifying

1:561:571:585 rule changes between Super Tour Apr 2019 and Super Tour Feb 20255 ▾4 rule changes between Super Tour Feb 2025 and Super Tour Feb 20264 ▾SMX race best at Super Tour Feb 2025: 1:57.417 (Ethan Lampe)SMX race best at Super Tour Feb 2026: 1:57.973 (William Wallis)SMX qualifying best at Super Tour Feb 2025: 1:56.431 (Ethan Lampe)SMX qualifying best at Super Tour Feb 2026: 1:56.503 (Lincoln Larson)Super Tour Apr 2019Super Tour Apr2019Super Tour Feb 2025Super Tour Feb2025Super Tour Feb 2026Super Tour Feb2026
FMF6FBSMXsolid race · dashed qualifying · slower is lower
EventFMF6FBSMX
Qual bestRace bestTrapQual bestRace bestTrapvs FM% of FMQual bestRace bestTrapvs FM% of FMQual bestRace bestTrapvs FM% of FM
Super Tour Feb 2026 CALCL262026-02-211:56.503Lincoln Larson · fastest of 15 · top 5 within 0.7s+0.072s (+0.06%)1:57.973William Wallis · fastest of 15 · top 5 within 0.8s+0.556s (+0.47%)141.6Joey Andrews+28.0 mph (+24.6%)
4 rule changes (SMX: 4)3 wording · 1 other · SMX drivers must submit data acquisition files on time or face suspension and $250 fine. · SMX penalty language clarified: level 1 and 3 infractions may carry $1,000 fines, level 2 and 4 may carry $500 fines. · SMX tire marking rules clarified: one set Toyo RR P235/40/ZR17 per weekend, impound after first dry session, damaged tires may be replaced with used only. · SMX competitors must submit AiM data files within 60 minutes instead of 30 after timed sessions.showhide
  • SMX SMX Data Submission - Penalties #38248otheraddedSMX drivers must submit data acquisition files on time or face suspension and $250 fine.
  • SMX Committee) SMX Penaly Clarification updated language #38337wordingwordingSMX penalty language clarified: level 1 and 3 infractions may carry $1,000 fines, level 2 and 4 may carry $500 fines.
  • SMX Clarify Tire Marking Regs #38004wordingwordingSMX tire marking rules clarified: one set Toyo RR P235/40/ZR17 per weekend, impound after first dry session, damaged tires may be replaced with used only.
  • SMX SMX Data Submission Timeframe #38039wordingwordingSMX competitors must submit AiM data files within 60 minutes instead of 30 after timed sessions.
Super Tour Feb 2025 CALCL252025-02-221:56.431Ethan Lampe · fastest of 15 · top 5 within 1.5s1:57.417Ethan Lampe · fastest of 15 · top 5 within 1.6s113.6Ryan Gutile
5 rule changes (SMX: 5)1 engine · 3 wording · 1 other · SMX OE instrument cluster must stay unmodified and connected; aftermarket dash allowed if wiring only re-routed; alternate gauges now permitted; foot pedal comfort mods allowed without relocation. · SMX Spec MX-5 camera requirement: non-functioning recorder now will instead of may warrant penalty or disqualification. · SM and SMX must run latest AIM Data Logger Spec MX-5 ECU Protocol, effective 2024-09-01. · SMX Mazda MX-5 OE versus OEM definitions clarified in GCR section 9.1.7.1; wording change only. · SM and SMX now allow an alternate shifter bushing at the bottom of the shift lever.showhide
  • SMX E&O SMX Regs 9.1.7.1.D.5.u-.w #37070wordingwordingSMX OE instrument cluster must stay unmodified and connected; aftermarket dash allowed if wiring only re-routed; alternate gauges now permitted; foot pedal comfort mods allowed without relocation.
  • SMX SMX Camera Rule Correction #36496wordingwordingSMX Spec MX-5 camera requirement: non-functioning recorder now will instead of may warrant penalty or disqualification.
  • SMX Committee) AIM ECU Protocol #36556engineadded · engineSM and SMX must run latest AIM Data Logger Spec MX-5 ECU Protocol, effective 2024-09-01.
  • SMX Committee) OE versus OEM Definitons #36608wordingwordingSMX Mazda MX-5 OE versus OEM definitions clarified in GCR section 9.1.7.1; wording change only.
  • SMX Committee) Shifter Bushing #36611otheraddedSM and SMX now allow an alternate shifter bushing at the bottom of the shift lever.
Super Tour Apr 2019 ST19APR262019-04-26
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 FM" is the class's best as a share of FM'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 FM'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.