Lap times across years say as much about the weather as the class. % of AS is each class's best lap as a share of AS'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.
Quickest here:AS 1:34.231 Tom Ellis, Super Tour Mar 2021 qualifying · HP 1:40.458 Steve Sargis, Super Tour Mar 2025 race
ASSRFHPsolid race · dashed qualifying · slower is lower
ASSRFHPsolid race · dashed qualifying · each class's best lap as a share of AS's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
Event
AS
SRF
HP
Qual best
Race best
Trap
Qual best
Race best
Trap
vs AS
% of AS
Qual best
Race best
Trap
vs AS
% of AS
Super Tour Mar 2026 ST26MAR062026-03-06
2:28.404Michael Kamalian · only car+52.937s (+55.45%)
1:34.642Michael Kamalian · only car-0.709s (-0.74%)
140.9Michael Kamalian+2.4 mph (+1.7%)
1:42.769Steve Sargis · fastest of 6 · top 5 within 15.3s+0.408s (+0.40%)
1:45.802Steve Sargis · fastest of 5 · top 5 within 11.1s+5.344s (+5.32%)
114.0Steve Sargis+2.3 mph (+2.1%)
+11.160squal -45.635s
111.8%qual 69.2%
40 rule changes (AS: 11, SRF: 4, HP: 25)10 weight · 5 cars added · 5 engine · 5 induction · 3 tyres & wheels · 1 suspension & brakes · 5 wording · 6 other · AS Spec Lines reorganized for 2026; detailed chassis, engine, weight, wheelbase, tire and brake specifications moved to main rules and engine build sheets. · AS GM LM7 5.3L gains Edelbrock 71187 intake manifold, MSD 6014 ignition box, Holly 4776 carb option under full prep spec line. · AS Ford Mustang and Mercury Capri with Restricted Prep engines get 61 mm restrictor, down from 64 mm. · AS Ford Mustang GT 94-04 Restricted Prep Engine now permits Ford Motorsport M-6250-F303 camshaft. · AS Cadillac CTS-V 04-07 Restricted Prep minimum weight drops to 3400 lbs. · AS Ford Mustang GT 5.0 2018- minimum weight reduced to 3525 lbs. · AS Ford Mustang GT 05-14 Restricted Prep Engine gains additional gear ratio option: 3.66, 2.43, 1.69, 1.32, 1.00, .65. · AS Ford Mustang GT 5.0L 15-17 flat plate restrictor reduces from 67mm to 64mm. · AS LS1/LS6 intakes added for 5.3L truck engine: part numbers 12561269 and 88894095. · AS Flotek head value seat cutting dimensions figure updated for consistency. · AS class notes cleaned: fuel cell and ECM specifications removed from multiple Camaro, Firebird, Challenger and Mustang variants.showhide
AS Re-Organization of AS Spec lines for 2026 #39887wordingwordingAS Spec Lines reorganized for 2026; detailed chassis, engine, weight, wheelbase, tire and brake specifications moved to main rules and engine build sheets.
HP Clarification On Oil Cooler Ducting #39604tyres & wheels
HP Honda Fit 2015-19 Error in Engine Classification #39853engine
AS Edelbrock manifold (& timing kit) to Chevy LS Spec Lines Request #39055cars addedaddedAS GM LM7 5.3L gains Edelbrock 71187 intake manifold, MSD 6014 ignition box, Holly 4776 carb option under full prep spec line.
HP Triumph Spitfire 1296cc Compression Ratio Increase to 12:1 #39589engine
AS Restrictor Plate Change for Gen 2 Ford Coyote Engine #39501inductionslowerinductionAS Ford Mustang and Mercury Capri with Restricted Prep engines get 61 mm restrictor, down from 64 mm.
HP E/O: Improve Consistency of the Spec Lines #39500other
HP Request to Reclassify BMW 2002 Into H Production #39567cars added
AS 1994 Mustang Spec Line Request #39104engineaddedengineAS Ford Mustang GT 94-04 Restricted Prep Engine now permits Ford Motorsport M-6250-F303 camshaft.
HP Request to Re-Classsify Datsun SPL-311 to HP from FP #39116cars added
HP EP Fiat 124 Spider Competition Adjustment Request #38498weight -50 lbs
AS Errors and Omissions #38234otheraddedAS Ford Mustang GT 05-14 Restricted Prep Engine gains additional gear ratio option: 3.66, 2.43, 1.69, 1.32, 1.00, .65.
HP Base Weight Adjustment for H-Production X1/9 Spec Lines #38255weight -50 lbs
AS Errors and Omission #38055inductionslowerinductionAS Ford Mustang GT 5.0L 15-17 flat plate restrictor reduces from 67mm to 64mm.
AS Request to Add LS1/LS6 Intakes for 5.3L Truck Engine EnO #38197cars addedaddedAS LS1/LS6 intakes added for 5.3L truck engine: part numbers 12561269 and 88894095.
AS Flotek Head Plunge Cut Inconsistencies #37502wordingwordingAS Flotek head value seat cutting dimensions figure updated for consistency.
AS Notes clean up #37693wordingwordingAS class notes cleaned: fuel cell and ECM specifications removed from multiple Camaro, Firebird, Challenger and Mustang variants.
HP Request for Classification of Chevrolet Spark #37755cars added
HP Request to Lower Ford Festiva Minimum Weight to 1600 LBS #37939weight -100 lbs
1:35.467Thomas J Ellis · fastest of 4 · top 4 within 2.7s-8.834s (-8.47%)
1:35.351Thomas J Ellis · fastest of 4 · top 4 within 1.1s-24.914s (-20.72%)
138.6James Jost+8.6 mph (+6.6%)
1:42.361Steve Sargis · fastest of 13 · top 5 within 2.0s-3.696s (-3.48%)
1:40.458Steve Sargis · fastest of 11 · top 5 within 3.0s-7.101s (-6.60%)
111.7Jesse Prather+8.7 mph (+8.5%)
+5.107squal +6.894s
105.4%qual 107.2%
35 rule changes (AS: 12, SRF: 6, HP: 17)6 cars added · 5 engine · 5 weight · 4 tyres & wheels · 2 induction · 2 suspension & brakes · 3 wording · 8 other · AS removes 'Any ECM maybe used' note from five Cadillac and Chevrolet/Pontiac V8 Restricted Prep models. · AS Ford Mustang and Cobra Coyote engine restrictor increases to 80mm from 67mm or 64mm. · AS Mustang GT 05-14 Restricted loses 300 lbs engine; 15-17 and 2018+ models lose 61mm and 60mm restrictors respectively. · AS class: multiple American muscle cars gain additional allowed gear ratio options across model years and prep levels. · AS LS-engine cars gain ECU freedom: CTS-V, Camaro, Firebird (70–02) and Camaro SS may use any ECM.showhide
AS Race memo #37902wordingwordingAS removes 'Any ECM maybe used' note from five Cadillac and Chevrolet/Pontiac V8 Restricted Prep models.
HP Request Competition Adjustment to BMW Z3 2.5L #37120induction
HP MINI Cooper (07-13) Spec Line Correction: Errors and Omissions #37560engine
HP Effective date for Jan 2025 GCR updates #37654induction
AS Increase Coyote Engine Restrictor to 80mm #36177enginefasterengineAS Ford Mustang and Cobra Coyote engine restrictor increases to 80mm from 67mm or 64mm.
AS Performance Pack for 2015+ Mustang #36867enginefasterengineAS Mustang GT 05-14 Restricted loses 300 lbs engine; 15-17 and 2018+ models lose 61mm and 60mm restrictors respectively.
AS Gear Ratios #37131otheraddedAS class: multiple American muscle cars gain additional allowed gear ratio options across model years and prep levels.
AS ECU specs for LS engine #37208engineaddedengineAS LS-engine cars gain ECU freedom: CTS-V, Camaro, Firebird (70–02) and Camaro SS may use any ECM.
HP Request to Reduce Weight of BMW 325i/is E30 (84-91) Spec Line #37119weight -50 lbs
HP Request to Update 1988-1991 Civic to Match 1988-1991 CRX #37444weight -70 lbs
HP MINI Cooper Spec Line Correction - Rear Brake Rotor Diameter #37176suspension & brakes
HP Do Something About the Toyota Yaris In H Production #25834weight +130 lbs
HP Request to Allow 2011+ Fiesta to Change Bolt Pattern on Wheels #25929tyres & wheels
AS SMG Mustang eligibility in American sedan #26224cars 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 AS" is the class's best as a share of AS'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 AS'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.