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BoP Lab / Laguna Seca

GT1 vs GTL vs P1 pace at Laguna Seca

Class · click a class to switch, + to compare alongside (up to 4)
AS+B-Spec+EP+EPx+F5+FA+FB+FC+FE2+FF+FM+FP+FV+GT1×GT2+GT3+vsGTL×HP+vsP1×P2+SM+SRF3+STL+STU+T1+T2+T3+T4+
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

Quickest here: GTL 1:41.792 Joe Huffaker, Hoosier SCCA Super Tour (San Francisco Region) qualifying · P1 1:21.626 Jim Devenport, Hoosier SCCA Super Tour (San Francisco Region) qualifying

EventGT1GTLP1
Qual bestRace bestTrapQual bestRace bestTrapvs GT1Qual bestRace bestTrapvs GT1
Hoosier SCCA Super Tour (San Francisco Region) ST19JUL262019-07-261:41.792Joe Huffaker · fastest of 3 · top 3 within 6.3s1:42.168Joe Huffaker · fastest of 3 · top 3 within 6.6s97.2Taz Harvey1:21.626Jim Devenport · fastest of 6 · top 5 within 5.2s1:21.922Todd Slusher · fastest of 6 · top 5 within 4.1s121.3John Manfroy
29 earlier rule changes on record, in force before Hoosier SCCA Super Tour (San Francisco Region) (from 2019)6 cars added · 3 induction · 2 removed · 1 aero · 1 engine · 1 weight · 15 wording · GT1 allows Trans Am rear wing, 12" chord, 72" span, 1/2" wicker, 100 sq in endplates, no weight penalty. · GTL Honda CRZ 10-14, CRZ 15-16, and Insight 00-06 gain alternate wheelbase option of 90.6 in. · P1 allows mechanical and solenoid shifters, prohibits electronic controls and pre-selected changes. · P1 bodywork minimum height provision moved to aerodynamic section; 115cm height limit for aero parts added. · P1 clarifies fender louver and brake duct rules, consolidating duplicative provisions in GCR 9.1.8.C. · P1 anti-intrusion panels now allowed anywhere on chassis sides, previously restricted. · P1 bodywork wording corrected: 'a passenger' becomes 'passenger' in three GCR sections. · GTX tube frame cars gain fuel injection with 90mm maximum throttle body size. · Ligier JS2 R classified in GTX, no performance parameters specified in filing. · GTL adds VW Fun Cup Beetle, all model years, 2-door RWD, 94.5-inch wheelbase. · GTX tube frame cars gain fuel injection with 90mm maximum throttle body size. · Ligier JS2 R classified in GTX, no performance parameters specified in filing. · GTL Mazda 13B may use 25mm SIR with 175 lbs weight penalty added. · P1 Engine Table reference cleaned up; no performance change. · P1 Mazda Renesis Rotary removed from Engine Table specification line. · GT1 and GT2/GT3/LITE ride height requirements removed from GCR sections 9.1.2.D.5.a.1 and 9.1.2.F.7.b. · GT1 and GT2/GT3/LITE ride height requirements removed from GCR sections 9.1.2.D.5.a.1 and 9.1.2.F.7.b. · P1 Staudacher and Honda K20A-FD2 engine table language cleaned up; no performance changes. · GTL Mazda 12A may use 28mm SIR plus 175 lbs. · GTL Mustang 94-04 newly classified in GTL. · P1 closed cockpit single-seat cars moved from subsection J.5 to subsection B.4; prohibition unchanged. · P1 engine table reference corrected from 'above' to 'below'; ECU throttle wording clarified for dual sensors and fail-safes. · GTX FIA GT3: Audi R8 40mm restrictor 2900 lbs, BMW Z4 70mm 2800 lbs, Ferrari 488 35mm restrictor 3025 lbs classified. · GTL Mini 1275-1399 Iron and Aluminum Crossflow gain 75 lbs weight reduction to 125 lbs with OE common sump gearbox. · GTL BMC thru Rover Group removes long inactive Mini engines: 948, 970, 1071, 1098. · GTX FIA GT3: Audi R8 40mm restrictor 2900 lbs, BMW Z4 70mm 2800 lbs, Ferrari 488 35mm restrictor 3025 lbs classified. · P1 removes redundant TIR inlet restrictor provisions; SIR and flat plate restrictors remain required. · P1 Honda K20A-FD2 CN-spec clarifies allowed parts to OEM list only, no machining. · P1 engine table wording corrected; head designs removed from listed specifications.showhide
  • GT1 Clarify Trans Am Legal Bodywork and Wing #26953aerofasterGT1 allows Trans Am rear wing, 12" chord, 72" span, 1/2" wicker, 100 sq in endplates, no weight penalty.
  • GTL Request CRZ wheelbase change #26896wordingunclearGTL Honda CRZ 10-14, CRZ 15-16, and Insight 00-06 gain alternate wheelbase option of 90.6 in.
  • P1 E&O Transmissions #27005wordingwordingP1 allows mechanical and solenoid shifters, prohibits electronic controls and pre-selected changes.
  • P1 Move minimum height provision to #27031wordingwordingP1 bodywork minimum height provision moved to aerodynamic section; 115cm height limit for aero parts added.
  • P1 Remove duplicative fender louver provision #27033wordingwordingP1 clarifies fender louver and brake duct rules, consolidating duplicative provisions in GCR 9.1.8.C.
  • P1 Missing word E&O #26919wordingwordingP1 anti-intrusion panels now allowed anywhere on chassis sides, previously restricted.
  • P1 E&O correction to GCR 9.1.8.C.C. #26927wordingwordingP1 bodywork wording corrected: 'a passenger' becomes 'passenger' in three GCR sections.
  • GT1 Request GTX Fuel injection for previous GT-1 tube frame cars #26141inductionfasterGTX tube frame cars gain fuel injection with 90mm maximum throttle body size.
  • GT1 Request to Classify Ligier JS2 R #26535cars addedcars addedLigier JS2 R classified in GTX, no performance parameters specified in filing.
  • GTL Request to Classify VW Fun Cup Beetle #25986cars addedcars addedGTL adds VW Fun Cup Beetle, all model years, 2-door RWD, 94.5-inch wheelbase.
  • GTL Request GTX Fuel injection for previous GT-1 tube frame cars #26141inductionfasterGTX tube frame cars gain fuel injection with 90mm maximum throttle body size.
  • GTL Request to Classify Ligier JS2 R #26535cars addedcars addedLigier JS2 R classified in GTX, no performance parameters specified in filing.
  • GTL Request for GTL Mazda 13B SIR Increase with Penalty #26572engineslowerGTL Mazda 13B may use 25mm SIR with 175 lbs weight penalty added.
  • P1 Clean up reference to engine table #26648wordingwordingP1 Engine Table reference cleaned up; no performance change.
  • P1 Remove redundant spec line #26692removedremovedP1 Mazda Renesis Rotary removed from Engine Table specification line.
  • GT1 Request Ride Height Clarification #26600wordingwordingGT1 and GT2/GT3/LITE ride height requirements removed from GCR sections 9.1.2.D.5.a.1 and 9.1.2.F.7.b.
  • GTL Request Ride Height Clarification #26600wordingwordingGT1 and GT2/GT3/LITE ride height requirements removed from GCR sections 9.1.2.D.5.a.1 and 9.1.2.F.7.b.
  • P1 Clean Up Engine Table Language #26590wordingwordingP1 Staudacher and Honda K20A-FD2 engine table language cleaned up; no performance changes.
  • GTL Request Mazda 12a Rotary SIR Increase #26081inductionfasterGTL Mazda 12A may use 28mm SIR plus 175 lbs.
  • GTL Request to Classify Mustang 2 Body in GTL #26222cars addedcars addedGTL Mustang 94-04 newly classified in GTL.
  • P1 Move single-seat closed cockpit provision to #26376wordingwordingP1 closed cockpit single-seat cars moved from subsection J.5 to subsection B.4; prohibition unchanged.
  • P1 Correct errors in GCR section 9.1.8.C.J #26144wordingwordingP1 engine table reference corrected from 'above' to 'below'; ECU throttle wording clarified for dual sensors and fail-safes.
  • GT1 GTX Homologation table update #26034cars addedcars addedGTX FIA GT3: Audi R8 40mm restrictor 2900 lbs, BMW Z4 70mm 2800 lbs, Ferrari 488 35mm restrictor 3025 lbs classified.
  • GTL Request for GTL Mini Adjustments #25754weightfasterGTL Mini 1275-1399 Iron and Aluminum Crossflow gain 75 lbs weight reduction to 125 lbs with OE common sump gearbox.
  • GTL BMC thru Rover Group remove long inactive mini #25771removedremovedGTL BMC thru Rover Group removes long inactive Mini engines: 948, 970, 1071, 1098.
  • GTL GTX Homologation table update #26034cars addedcars addedGTX FIA GT3: Audi R8 40mm restrictor 2900 lbs, BMW Z4 70mm 2800 lbs, Ferrari 488 35mm restrictor 3025 lbs classified.
  • P1 Remove redundant inlet restrictor provisions #25877wordingwordingP1 removes redundant TIR inlet restrictor provisions; SIR and flat plate restrictors remain required.
  • P1 Clarify Honda K20A-FD2 parts requirement #25949wordingwordingP1 Honda K20A-FD2 CN-spec clarifies allowed parts to OEM list only, no machining.
  • P1 Correct GCR section 9.1.8.C.J errors #25966wordingwordingP1 engine table wording corrected; head designs removed from listed specifications.

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. 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.