BoP Lab / Laguna Seca

T4 vs F5 vs SM vs FC pace at Laguna Seca

Quickest here: T4 1:45.119 Izzy Sanchez, Super Tour Jul 2019 qualifying · SM 1:46.110 Tristan Littlehale, Super Tour Jul 2019 race · FC 1:28.860 Jason Reichert, Super Tour Jul 2019 qualifying

	Event	T4			F5					SM					FC
	Event	Qual best	Race best	Trap	Qual best	Race best	Trap	vs T4	% of T4	Qual best	Race best	Trap	vs T4	% of T4	Qual best	Race best	Trap	vs T4	% of T4
	Super Tour Jul 2019 ST19JUL262019-07-26	1:45.119Izzy Sanchez · fastest of 3 · top 3 within 6.6s	1:45.643Izzy Sanchez · fastest of 3 · top 3 within 3.3s	92.6Lance Stewart						1:46.159Tristan Littlehale · fastest of 11 · top 5 within 1.9s	1:46.110Tristan Littlehale · fastest of 11 · top 5 within 1.2s	87.0Justin Casey	+0.467squal +1.040s	100.4%qual 101.0%	1:28.860Jason Reichert · fastest of 11 · top 5 within 0.8s	1:29.754Jason Reichert · fastest of 11 · top 5 within 1.2s	110.2James Hakewill	-15.889squal -16.259s	85.0%qual 84.5%
19 earlier rule changes on record, in force before Super Tour Jul 2019 (from 2019)3 cars added · 3 suspension & brakes · 2 engine · 1 induction · 8 wording · 2 other · FC Wiseco piston and Crower rod part numbers updated; minimum weight unchanged at 976 grams. · SM fuel pump and filter now permitted as Mazda or OEM equivalent part. · T4 and T3 Mazda MX-5 hardtop rules clarified: any OEM or aftermarket top permitted if retaining OEM silhouette; specific part numbers listed. · T2, T3, T4 now allow any thermostat serving original equipment intent only. · T3 and T4 Mazda MX-5 Miata eligibility capped at 2016–2018 model years. · 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. · FC Wiseco piston and connecting rod minimum weight corrected to 976 grams. · T4 Celica GT wheelbase 2600 and 15x7 wheels added; Forte years narrowed; Fiesta ST starts 2014; Fiat 124 years 16-18 added; battery rule clarified. · T1–T4 spec car classifications clarified with permitted parts, rule conformance versions, and exclusions of other touring modifications. · T2–T4 subframe bushings now permitted to be replaced with non-spherical bushings of any material.showhide 2019-07-01 T4 MR2 Spyder Year Correction #26936wording 2019-05-31 T4 Request to allow piggy back ECU on 2000 Mazda Protégé #26085engine 2019-05-31 T4 Request helper spring as optional #26678suspension & brakes 2019-05-01 FC E&O Wiseco piston and Crower connecting rod #26659wordingwordingFC Wiseco piston and Crower rod part numbers updated; minimum weight unchanged at 976 grams. 2019-04-01 T4 Request to classify 2000 - 2001 BMW 323 #25096cars added 2019-03-01 SM Request to allow aftermarket fuel filters. #26370otheraddedSM fuel pump and filter now permitted as Mazda or OEM equivalent part. 2019-03-01 T4 Correct Mazda MX-5 Hard Top Notes #26137wordingwordingT4 and T3 Mazda MX-5 hardtop rules clarified: any OEM or aftermarket top permitted if retaining OEM silhouette; specific part numbers listed. 2019-03-01 T4 Consider opening class rules to allow any thermostat #26187engineadded · engineT2, T3, T4 now allow any thermostat serving original equipment intent only. 2019-03-01 T4 Cap 2016 Mazda Miata year at 2018 #26388cars addedremoved · cars addedT3 and T4 Mazda MX-5 Miata eligibility capped at 2016–2018 model years. 2019-02-01 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. 2019-02-01 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. 2019-02-01 SM Strike Tire Tread Language #26123wordingremovedSM tire tread protrusion language removed from GCR 9.1.7.C.5. 2019-02-01 T4 2012-2015 Honda Civic Si Performance Request #26129suspension & brakes 2019-01-01 FC Correct Wiseco piston and connecting rod #25809wordingwordingFC Wiseco piston and connecting rod minimum weight corrected to 976 grams. 2019-01-01 T4 Errors, Omissions, and Updates (Various) #22414wordingwordingT4 Celica GT wheelbase 2600 and 15x7 wheels added; Forte years narrowed; Fiesta ST starts 2014; Fiat 124 years 16-18 added; battery rule clarified. 2019-01-01 T4 Request for Adjustments to fiat 124 specline #25371induction 2019-01-01 T4 Add Clarification to Spec Car Classifications Vehicle Spec #25774wordingwordingT1–T4 spec car classifications clarified with permitted parts, rule conformance versions, and exclusions of other touring modifications. 2019-01-01 T4 Clarify Subframe Bushings Permitted for T2-T4 #25800suspension & brakesadded · suspension & brakesT2–T4 subframe bushings now permitted to be replaced with non-spherical bushings of any material. 2019-01-01 T4 Consider Solo SSC cross over classification into T4 #25802cars added

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 T4" is the class's best as a share of T4'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 T4'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.