P1 vs FV vs FF pace at Michelin Raceway Road Atlanta
Quickest here:P1 1:18.122 Todd Vanacore, Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta qualifying · FV 1:43.556 Andrew Whitston, Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta race · FF 1:31.000 Porter Aiken, Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta qualifying
P1FVFFsolid race · dashed qualifying · slower is lower
P1FVFFsolid race · dashed qualifying · each class's best lap as a share of P1's at the same event (the reference class, changeable above); 100% is level, higher is quicker
Event
P1
FV
FF
Qual best
Race best
Trap
Qual best
Race best
Trap
vs P1
% of P1
Qual best
Race best
Trap
vs P1
% of P1
Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta ST26MAR062026-03-06
1:45.061Donnie Isley · fastest of 9 · top 5 within 5.0s+0.537s (+0.51%)
1:46.101Donnie Isley · fastest of 9 · top 5 within 3.6s+2.545s (+2.46%)
107.1Donnie Isley+4.9 mph (+4.8%)
1:32.437David Ybarra · fastest of 6 · top 5 within 2.6s+0.418s (+0.45%)
1:31.691David Ybarra · fastest of 6 · top 5 within 3.7s-0.370s (-0.40%)
127.3Axel Leroy+5.2 mph (+4.3%)
8 rule changes (P1: 1, FV: 1, FF: 6)2 tyres & wheels · 1 suspension & brakes · 1 weight · 4 wording · FF clarifies alternative tire eligibility for cars homologated 1989 or earlier with rocker arm or outboard suspension on all four corners. · FF adds rocker arm and outboard suspension cars optional bias ply and VFF tires; removes front-as-rear rule, adds mixing restrictions. · FF allows older cars with rocker arm or outboard suspension to use bias ply slicks or VFF tires instead of radials. · FF and FC cars with sequential gearbox must add 10 lbs. to minimum weight, down from 25 lbs. · FF Honda Fit allows Fast Forward 0.25mm oversize pistons PN FF800-110 as alternative; piston diameter spec clarified to 2.8835 inches. · FF VTEC activation valve must function; EGR blanking plate rule clarified with Fast Forward part numbers. · FV ferrous rotor no longer required to be smooth; may have up to three pad cleaning grooves per side. · P1 now encourages unspecified engines including Diesel, hybrid, or electric via case-by-case request to Club Racing Board.showhide
FF Formula F Alternative Tire Rule Proposed Clarifications #39281wordingneutralFF clarifies alternative tire eligibility for cars homologated 1989 or earlier with rocker arm or outboard suspension on all four corners.
FF Page 228, FF tire rule 9.1.1.10.e #38251tyres & wheelsneutralFF adds rocker arm and outboard suspension cars optional bias ply and VFF tires; removes front-as-rear rule, adds mixing restrictions.
FF Formula F Proposal to Invite Older Cars Via a Tire Rule Change #37802tyres & wheelsfasterFF allows older cars with rocker arm or outboard suspension to use bias ply slicks or VFF tires instead of radials.
FF Change FF/FC Weight with Sequential Gearbox #36651weightfasterFF and FC cars with sequential gearbox must add 10 lbs. to minimum weight, down from 25 lbs.
FF Alternative Oversize Honda Fit Pistons #37064wordingneutralFF Honda Fit allows Fast Forward 0.25mm oversize pistons PN FF800-110 as alternative; piston diameter spec clarified to 2.8835 inches.
FF Update to FF EGR Blanking Plate Rule #36633wordingneutralFF VTEC activation valve must function; EGR blanking plate rule clarified with Fast Forward part numbers.
FV Disc Brakes #36822suspension & brakesneutralFV ferrous rotor no longer required to be smooth; may have up to three pad cleaning grooves per side.
P1 Update GCR section 9.1.8.B.J.7 #35907wordingneutralP1 now encourages unspecified engines including Diesel, hybrid, or electric via case-by-case request to Club Racing Board.
Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta ST24MAR082024-03-08
1:19.119Todd Vanacore · fastest of 3 · top 3 within 18.1s+0.997s (+1.28%)
1:19.924John Mcaleer · fastest of 3 · top 3 within 17.8s-0.010s (-0.01%)
139.8John Mcaleer-12.4 mph (-8.2%)
1:44.524Andrew Whitston · fastest of 12 · top 5 within 3.0s-1.850s (-1.74%)
1:43.556Andrew Whitston · fastest of 12 · top 5 within 1.3s-2.653s (-2.50%)
102.2Andrew Whitston-6.3 mph (-5.8%)
+23.632squal +25.405s
129.6%qual 132.1%
1:32.019Sebastian Mateo Naranjo · fastest of 7 · top 5 within 4.4s+1.019s (+1.12%)
1:32.061Sebastian Mateo Naranjo · fastest of 7 · top 5 within 3.1s+1.002s (+1.10%)
122.0Calum Dunbar-13.8 mph (-10.1%)
+12.137squal +12.900s
115.2%qual 116.3%
11 rule changes (P1: 9, FV: 1, FF: 1)1 engine · 1 weight · 9 wording · P1 removes redundant effective date language from engine stalling prohibition during SIR testing. · P1 Honda K20A-FD2 engine terminology corrected from 'spec' to proper series designation. · FF Honda Fit gains Fast Forward FF800-100 oversize piston ring pack option. · F600 Rotax 494, 493, 593 engines now require single expansion chamber and pull starter; electric starter optional. · P1 4-cycle 2000cc restrictor increases to 32mm, weight rises to 1450 lbs; 2300cc restrictor to 31mm, weight to 1475 lbs. · P1 Group CN Honda K20A-FD2 removes engine modification restrictions; CRB may add intake restrictor. · FV front wheel bearings wording clarified in GCR 9.1.1.C.10.G. · P1 SIR testing procedure modified: vehicle deemed compliant if stalls within 3 seconds. · P1 Single Inlet Restrictor wording clarified; all intake air or fuel-air mixture must pass through it. · P1 ducted air rule clarified: cockpit opening, fender louvers, and engine bay heat escape devices exempt from heat exchanger requirement. · P1 cockpit length dimension corrected from 23.662 to 23.622 inches; height and extension limits clarified with metric-imperial equivalents.showhide
P1 Remove redundant effective date language in GCR 9.1.8.B.J.4 #35693wordingneutralP1 removes redundant effective date language from engine stalling prohibition during SIR testing.
P1 Correct engine series terminology #35694wordingneutralP1 Honda K20A-FD2 engine terminology corrected from 'spec' to proper series designation.
FF Honda Fit Oversize Piston Rings #35305wordingneutralFF Honda Fit gains Fast Forward FF800-100 oversize piston ring pack option.
P1 Please correct omitted punctuation #34890engineneutralF600 Rotax 494, 493, 593 engines now require single expansion chamber and pull starter; electric starter optional.
P1 Adjust restrictors and weights for Engine Table lines H and I #35229weightslowerP1 4-cycle 2000cc restrictor increases to 32mm, weight rises to 1450 lbs; 2300cc restrictor to 31mm, weight to 1475 lbs.
P1 Revise Group CN Honda K20A-FD2 Spec Line #35337wordingunclearP1 Group CN Honda K20A-FD2 removes engine modification restrictions; CRB may add intake restrictor.
FV FV Wheel Bearing Clarification #35150wordingneutralFV front wheel bearings wording clarified in GCR 9.1.1.C.10.G.
P1 SIR Testing #34354wordingneutralP1 SIR testing procedure modified: vehicle deemed compliant if stalls within 3 seconds.
P1 E&O Single Inlet Restrictor abbreviation, etc. #34369wordingneutralP1 Single Inlet Restrictor wording clarified; all intake air or fuel-air mixture must pass through it.
P1 E&O Clean up ducted air provision #34410wordingneutralP1 ducted air rule clarified: cockpit opening, fender louvers, and engine bay heat escape devices exempt from heat exchanger requirement.
P1 E&O - Correct dimensional equivalents #34018wordingneutralP1 cockpit length dimension corrected from 23.662 to 23.622 inches; height and extension limits clarified with metric-imperial equivalents.
Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta ST23MAR102023-03-10
1:18.122Todd Vanacore · fastest of 5 · top 5 within 13.9s
1:19.934Jean-Luc Liverato · fastest of 3 · top 3 within 1.0s
152.2Jean-Luc Liverato
1:46.374Mitchell Ferguson · fastest of 6 · top 5 within 3.0s
1:46.209Stevan Davis · fastest of 6 · top 5 within 1.3s
108.5Russell Fredericks
+26.275squal +28.252s
132.9%qual 136.2%
1:31.000Porter Aiken · fastest of 17 · top 5 within 1.5s
1:31.059Robert Albani · fastest of 17 · top 5 within 0.4s
135.8Callum Baxter
+11.125squal +12.878s
113.9%qual 116.5%
62 earlier rule changes on record, in force before Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta (from 2019)6 engine · 6 tyres & wheels · 3 aero · 2 induction · 2 removed · 2 weight · 1 cars added · 40 wording · FF Honda Fit engine adds Fast Forward part number alternatives for intake, exhaust, oil system, and scavenge pump components. · P1 suspension covers must have symmetrical upper and lower surfaces, no airfoil shaping, cannot angle for downforce. · P1 aerodynamic devices limited to 1cm below lower surfaces rear of front axle; body panels covering suspension cannot be airfoil-shaped. · P1 forced induction banned: turbocharging and supercharging no longer allowed. · P1 motorcycle-based engines with individual throttle bodies must install flat plate restrictors within 4 inches of primary butterfly. · P1 bodywork rules clarified: cycle fenders prohibited, side body minimum height at front axle centerline required, air ducting for downforce banned. · FV connecting rod rules add Brian Crower part #BC6417 and Newland Group #4M113077 as allowed replacements. · FV connecting rods minimum weight 425.0 grams, center-to-center length 130 ± 0.10/-0.25 mm specified. · FV connecting rod suppliers clarified: Crower SP93280B and BrianCrower BC6417 allowed as direct replacements. · P1 2-cycle 6-cylinder displacement increases to 1725 cc, restrictor shrinks to 40mm, minimum weight drops to 1275 lbs. · FV allows Crower SP93280B and Brian Crower Racing Rods as direct replacement connecting rods, must meet OEM minimum weight. · P1 splits 2000cc and 2300cc engines into separate spec lines H and I with dedicated minimum weights. · P1 Staudacher cars with 38.5mm flat plate intake restrictor reduced to 950 lbs minimum weight. · P1 adds 1355cc motorcycle-based engine spec line with no restrictor required, minimum weight 1075 lbs. · P1 tonneau cover wording clarified: equipment must be securely attached; covers allowed for minimum dimensions. · P1 Staudacher with 1005cc homologated before 1-1-2014 may run 38.5mm flat plate intake restrictor at 950 lbs minimum weight. · P1 Spec Lines C and G: intake restrictor rules clarified with specific displacement and weight thresholds; wording standardized. · P1 Spec Lines B, C, D maximum valves per cylinder set to 4, was NA. · FF block relief permitted only as needed to fit allowed crankshaft. · P1 Spec Line A clarifies carburetor induction only, one per cylinder, balance tubes not allowed. · P1 Spec Line H notes clarify peripheral port or bridgeport allowed. · P1 Elan DP02 Mazda MZR sealed engine option removal effective 3/1/2021. · P1 engine table updates terminology from inlet to intake restrictor across multiple spec lines. · FF class cylinder head may now have optional coolant bleed line fitting to top of head for air release. · FF Honda LC1 ECU by HPD permitted effective 12/1/2020, must use HPD lambda sensor. · FF Honda LC1 ECU implementation date changed from 3/1/2020 to pending availability of support materials. · FV now allows 4 bolt wheels, previously restricted to 5 bolt wheels. · FV now supports 4-bolt pattern wheels in addition to existing wheel specifications. · P1 intake manifolds unrestricted on engines without flat plate restrictor; plenums and balance pipes prohibited on individual runner manifolds with restrictor. · FF alternator changes from not required to optional. · FF allows Honda HPD LC1 low-cost ECU with lambda sensor; E1 ECU no longer supported but existing units permitted if sealed. · FF rain tyres now allow Hoosier W3 Radial in addition to existing Hoosier Wet option. · FV rain tire requirement changed to Hoosier #44266 22.5 x 5.0 x 15 WET or W3. · P1 sealed DP02-spec 2.0L Mazda MZR Elan removal date extended from 1/1/2020 to 1/1/2021. · FV allows non-spec Hoosier tires in Regional races until 2020-01-01, when spec tires become required. · FV allows rear tires on front of car; mandates Hoosier #43337 fronts and #43353 rears, plus #44266 rain tire from 2020-01-01. · P1 sealed DP02-spec 2.0 MZR engine removed effective 1/1/2020; competitors may use Spec Line G. · P1 Spec Line F Honda K20A-FD2 reclassified from Restricted 2.0L Group to CN-spec with stock intake manifold and 64mm throttle body. · FV wheels clarified: 15" x 4J standard or 15" x 4.5J steel VW, 5-bolt pattern, same track dimensions. · FV exhaust outlet location tightened to 1–4 inches behind rearmost body part. · FV wheels now permit 15-inch 4.5J steel wheels within C.2 track dimensions, adding to standard 4J options. · P1 traction control prohibited in GCR section 9.1.8.C.H. · 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. · FV exhaust opening can now extend to 4 inches behind body rear, previously 3 inches maximum. · P1 anti-intrusion panels now allowed anywhere on chassis sides, previously restricted. · P1 bodywork wording corrected: 'a passenger' becomes 'passenger' in three GCR sections. · FV front track maximum 52.500" and rear track 49.125"-50.750" no longer prohibits spacers. · P1 Engine Table reference cleaned up; no performance change. · P1 Mazda Renesis Rotary removed from Engine Table specification line. · FV disc brake assembly minimum weight clarified to 16.5 lbs total; caliper minimum weight requirement removed. · P1 Staudacher and Honda K20A-FD2 engine table language cleaned up; no performance changes. · P1 closed cockpit single-seat cars moved from subsection J.5 to subsection B.4; prohibition unchanged. · FF Honda Fit permitted to use 0.25mm oversize pistons, cylinder honing increased to 73.315mm maximum. · FF heat shield rule clarified: thermal wrap allowed on manifold exterior if easily removable for inspection. · FF catch tank minimum capacity rules clarified: coolant catch tank now one U.S. pint minimum, oil catch tank one U.S. quart minimum. · FV intake manifold horizontal tube measurement locations clarified between 1.500" and 8.000" on short side. · P1 engine table reference corrected from 'above' to 'below'; ECU throttle wording clarified for dual sensors and fail-safes. · 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
FF Add Fast Forward Part Numbers for Honda Fit Engine #33752wordingneutralFF Honda Fit engine adds Fast Forward part number alternatives for intake, exhaust, oil system, and scavenge pump components.
P1 November 2022 Rules Clarification for Suspension Covers #33615aeroslowerP1 suspension covers must have symmetrical upper and lower surfaces, no airfoil shaping, cannot angle for downforce.
P1 Clarify body panel coverage of suspension components #33318aeroslowerP1 aerodynamic devices limited to 1cm below lower surfaces rear of front axle; body panels covering suspension cannot be airfoil-shaped.
P1 E&O clarification regarding forced induction #33123inductionslowerP1 forced induction banned: turbocharging and supercharging no longer allowed.
P1 Clarify authorization to use flat plate intake restrictor #32964wordingneutralP1 motorcycle-based engines with individual throttle bodies must install flat plate restrictors within 4 inches of primary butterfly.
P1 E&O Clarification of Bodywork Rules #32468wordingneutralP1 bodywork rules clarified: cycle fenders prohibited, side body minimum height at front axle centerline required, air ducting for downforce banned.
FV Connecting Rod Update Request for 9.1.1.C Formula Vee (FV) 5.C.6 #32160wordingneutralFV connecting rod rules add Brian Crower part #BC6417 and Newland Group #4M113077 as allowed replacements.
FV E&O clarification of connecting rod center-to-center length #32183wordingneutralFV connecting rods minimum weight 425.0 grams, center-to-center length 130 ± 0.10/-0.25 mm specified.
FV Update direct replacement connecting rod information #31843wordingneutralFV connecting rod suppliers clarified: Crower SP93280B and BrianCrower BC6417 allowed as direct replacements.
P1 Displacement & Weight Change Request for 2-Cycle 6 Cylinder #31609enginefasterP1 2-cycle 6-cylinder displacement increases to 1725 cc, restrictor shrinks to 40mm, minimum weight drops to 1275 lbs.
FV Formula V Connecting Rod Replacement #31448wordingneutralFV allows Crower SP93280B and Brian Crower Racing Rods as direct replacement connecting rods, must meet OEM minimum weight.
P1 Move 2000cc and 2300cc engine options to individual spec lines #31012wordingneutralP1 splits 2000cc and 2300cc engines into separate spec lines H and I with dedicated minimum weights.
P1 E&O Spec Line B notes #31095weightfasterP1 Staudacher cars with 38.5mm flat plate intake restrictor reduced to 950 lbs minimum weight.
P1 Add 1355cc spec line #30890cars addedneutralP1 adds 1355cc motorcycle-based engine spec line with no restrictor required, minimum weight 1075 lbs.
P1 E&O tonneau cover provision in cockpit opening section #30458wordingneutralP1 tonneau cover wording clarified: equipment must be securely attached; covers allowed for minimum dimensions.
P1 Update Spec Line B Notes #30498wordingneutralP1 Staudacher with 1005cc homologated before 1-1-2014 may run 38.5mm flat plate intake restrictor at 950 lbs minimum weight.
P1 Update Spec Lines C and G notes #30499wordingneutralP1 Spec Lines C and G: intake restrictor rules clarified with specific displacement and weight thresholds; wording standardized.
P1 E&O Maximum Valves Per Cylinder #30559engineunclearP1 Spec Lines B, C, D maximum valves per cylinder set to 4, was NA.
FF Kent crankshaft clarification #30426wordingneutralFF block relief permitted only as needed to fit allowed crankshaft.
P1 Clean up Spec Line A notes section #30424wordingneutralP1 Spec Line A clarifies carburetor induction only, one per cylinder, balance tubes not allowed.
P1 Clean up Spec Line H notes section #30425wordingneutralP1 Spec Line H notes clarify peripheral port or bridgeport allowed.
P1 E&O restrictor terminology #30285wordingneutralP1 engine table updates terminology from inlet to intake restrictor across multiple spec lines.
FF Allow Optional Coolant Bleed Line to Correct a Known Problem #29673wordingneutralFF class cylinder head may now have optional coolant bleed line fitting to top of head for air release.
FF Clarification regarding Honda LC1 ECU implementation date #29684wordingneutralFF Honda LC1 ECU by HPD permitted effective 12/1/2020, must use HPD lambda sensor.
FF Clarification regarding Honda LC1 ECU implementation #29135wordingneutralFF Honda LC1 ECU implementation date changed from 3/1/2020 to pending availability of support materials.
FV Support for Recommended Item - 4 bolt wheels in FV #29084tyres & wheelsneutralFV now allows 4 bolt wheels, previously restricted to 5 bolt wheels.
FV Support for 4-bolt pattern wheels #28955 #29118wordingneutralFV now supports 4-bolt pattern wheels in addition to existing wheel specifications.
P1 E&O minimum weights and intake manifolds #28731inductionfasterP1 intake manifolds unrestricted on engines without flat plate restrictor; plenums and balance pipes prohibited on individual runner manifolds with restrictor.
FF E&O FF Kent Engine alternator language #28204wordingneutralFF alternator changes from not required to optional.
FF Honda Racing HPD low cost ECU proposal #27563engineneutralFF allows Honda HPD LC1 low-cost ECU with lambda sensor; E1 ECU no longer supported but existing units permitted if sealed.
FF Update rain tire designation #28443tyres & wheelsneutralFF rain tyres now allow Hoosier W3 Radial in addition to existing Hoosier Wet option.
FV Update rain tire designation #28444tyres & wheelsneutralFV rain tire requirement changed to Hoosier #44266 22.5 x 5.0 x 15 WET or W3.
P1 Extend date for removing sealed DP02-spec 2.0L option #28046wordingneutralP1 sealed DP02-spec 2.0L Mazda MZR Elan removal date extended from 1/1/2020 to 1/1/2021.
FV FV Allow non-spec tire in Regional competition #26284tyres & wheelsneutralFV allows non-spec Hoosier tires in Regional races until 2020-01-01, when spec tires become required.
FV Request to Allow Rear Tires on the Front of Formula Vee #26537tyres & wheelsneutralFV allows rear tires on front of car; mandates Hoosier #43337 fronts and #43353 rears, plus #44266 rain tire from 2020-01-01.
P1 Remove sealed DP02-spec 2.0 MZR spec #26753removedslowerP1 sealed DP02-spec 2.0 MZR engine removed effective 1/1/2020; competitors may use Spec Line G.
P1 Update Revised Spec Line F #27745engineunclearP1 Spec Line F Honda K20A-FD2 reclassified from Restricted 2.0L Group to CN-spec with stock intake manifold and 64mm throttle body.
FV Clarification on Wheel Bolt Pattern #27603wordingneutralFV wheels clarified: 15" x 4J standard or 15" x 4.5J steel VW, 5-bolt pattern, same track dimensions.
FV Allowed Modifications E&O #27398wordingneutralFV exhaust outlet location tightened to 1–4 inches behind rearmost body part.
FV E&O Wheels #27230tyres & wheelsneutralFV wheels now permit 15-inch 4.5J steel wheels within C.2 track dimensions, adding to standard 4J options.
P1 E&O Transmissions #27098wordingunclearP1 traction control prohibited in GCR section 9.1.8.C.H.
P1 E&O Transmissions #27005wordingneutralP1 allows mechanical and solenoid shifters, prohibits electronic controls and pre-selected changes.
P1 Move minimum height provision to #27031wordingneutralP1 bodywork minimum height provision moved to aerodynamic section; 115cm height limit for aero parts added.
P1 Remove duplicative fender louver provision #27033wordingneutralP1 clarifies fender louver and brake duct rules, consolidating duplicative provisions in GCR 9.1.8.C.
FV Exhaust termination rule E&O #26702aeroneutralFV exhaust opening can now extend to 4 inches behind body rear, previously 3 inches maximum.
P1 Missing word E&O #26919wordingneutralP1 anti-intrusion panels now allowed anywhere on chassis sides, previously restricted.
P1 E&O correction to GCR 9.1.8.C.C. #26927wordingneutralP1 bodywork wording corrected: 'a passenger' becomes 'passenger' in three GCR sections.
FV E&O Dimensions #26674wordingneutralFV front track maximum 52.500" and rear track 49.125"-50.750" no longer prohibits spacers.
P1 Clean up reference to engine table #26648wordingneutralP1 Engine Table reference cleaned up; no performance change.
P1 Remove redundant spec line #26692removedneutralP1 Mazda Renesis Rotary removed from Engine Table specification line.
P1 Clean Up Engine Table Language #26590wordingneutralP1 Staudacher and Honda K20A-FD2 engine table language cleaned up; no performance changes.
P1 Move single-seat closed cockpit provision to #26376wordingneutralP1 closed cockpit single-seat cars moved from subsection J.5 to subsection B.4; prohibition unchanged.
FF Request for Oversize Honda Fit Pistons #25810enginefasterFF Honda Fit permitted to use 0.25mm oversize pistons, cylinder honing increased to 73.315mm maximum.
FF Heat Shield - Fit Intake #26102wordingneutralFF heat shield rule clarified: thermal wrap allowed on manifold exterior if easily removable for inspection.
FF Request catch cans/tanks clarification #26158wordingneutralFF catch tank minimum capacity rules clarified: coolant catch tank now one U.S. pint minimum, oil catch tank one U.S. quart minimum.
FV FV Intake Manifold Clarification #26008wordingneutralFV intake manifold horizontal tube measurement locations clarified between 1.500" and 8.000" on short side.
P1 Correct errors in GCR section 9.1.8.C.J #26144wordingneutralP1 engine table reference corrected from 'above' to 'below'; ECU throttle wording clarified for dual sensors and fail-safes.
P1 Remove redundant inlet restrictor provisions #25877wordingneutralP1 removes redundant TIR inlet restrictor provisions; SIR and flat plate restrictors remain required.
P1 Clarify Honda K20A-FD2 parts requirement #25949wordingneutralP1 Honda K20A-FD2 CN-spec clarifies allowed parts to OEM list only, no machining.
P1 Correct GCR section 9.1.8.C.J errors #25966wordingneutralP1 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. "% of P1" is the class's best as a share of P1'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 P1'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.