P2 vs FE vs P1 pace at Michelin Raceway Road Atlanta
Quickest here:P2 1:22.533 Lucian Pancea, Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta qualifying · P1 1:17.524 Chip Romer, Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta race
P2FEP1solid race · dashed qualifying · slower is lower
P2FEP1solid race · dashed qualifying · each class's best lap as a share of P2's at the same event (the reference class, changeable above); 100% is level, higher is quicker
Event
P2
FE
P1
Qual best
Race best
Trap
Qual best
Race best
Trap
vs P2
% of P2
Qual best
Race best
Trap
vs P2
% of P2
Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta ST24MAR082024-03-08
1:24.228Lucian Pancea · fastest of 4 · top 4 within 5.2s+1.695s (+2.05%)
1:26.233Sherman Chao · fastest of 4 · top 4 within 17.9s+2.429s (+2.90%)
134.0Lucian Pancea-12.5 mph (-8.5%)
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%)
-6.309squal -5.109s
92.7%qual 93.9%
19 rule changes (P2: 7, FE: 3, P1: 9)3 engine · 1 weight · 15 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. · FE rain light must meet FIA Standard 8874-2019, Technical List No. 76, effective 1/1/2024. · FE allows racer's tape for crash damage and fastener securing, prohibits body seam taping, permits heat exchanger taping only. · 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. · P2 AMAC modified engine range clarified to 2008 and older stock engines only, restrictor 38mm, weight 1025 lbs. · P2 Suzuki GSX-R1000 07/08 engine crankcase may swap to GSX-S1000 16/19 part #11301-04840. · P2 Table 1 corrects engine date ranges and brand specifications for Stock and Modified engines across multiple car models. · 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. · P2 side body height requirement clarified: outermost surface between wheel openings must equal front axle centerline height. · P2 closed cockpit single seat cars now prohibited unless specifically allowed in Table 1. · FE SADEV transmission ratios removed from review notice prior to sealing date. · P1 cockpit length dimension corrected from 23.662 to 23.622 inches; height and extension limits clarified with metric-imperial equivalents. · P2 engine table wording updated; redundant effective date language removed. · P2 motorcycle engines: 2011+ Kawasaki restrictor reduced to 34mm, minimum weight raised to 1100 lbs; 2009+ other brands weight raised to 1100 lbs.showhide
P1 Remove redundant effective date language in GCR 9.1.8.B.J.4 #35693wordingwordingP1 removes redundant effective date language from engine stalling prohibition during SIR testing.
P1 Correct engine series terminology #35694wordingwordingP1 Honda K20A-FD2 engine terminology corrected from 'spec' to proper series designation.
FE Update FE Rain Light Rule #34707wordingwordingFE rain light must meet FIA Standard 8874-2019, Technical List No. 76, effective 1/1/2024.
FE FE/FE2 rule update #35269wordingwordingFE allows racer's tape for crash damage and fastener securing, prohibits body seam taping, permits heat exchanger taping only.
P1 Please correct omitted punctuation #34890engineengineF600 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.
P2 E&O - Clarify B.1 modified engine range in AMAC spec lines #35225wordingwordingP2 AMAC modified engine range clarified to 2008 and older stock engines only, restrictor 38mm, weight 1025 lbs.
P2 Replacement Engine Crankcase for 07/08 Suzuki GSX-R1000 Engines #35340engineunclearP2 Suzuki GSX-R1000 07/08 engine crankcase may swap to GSX-S1000 16/19 part #11301-04840.
P2 Correct Table 1 for Engine Date Range Specifications #35182wordingwordingP2 Table 1 corrects engine date ranges and brand specifications for Stock and Modified engines across multiple car models.
P1 SIR Testing #34354wordingwordingP1 SIR testing procedure modified: vehicle deemed compliant if stalls within 3 seconds.
P1 E&O Single Inlet Restrictor abbreviation, etc. #34369wordingwordingP1 Single Inlet Restrictor wording clarified; all intake air or fuel-air mixture must pass through it.
P1 E&O Clean up ducted air provision #34410wordingwordingP1 ducted air rule clarified: cockpit opening, fender louvers, and engine bay heat escape devices exempt from heat exchanger requirement.
P2 Clarify minimum side body height requirement #34143wordingwordingP2 side body height requirement clarified: outermost surface between wheel openings must equal front axle centerline height.
P2 Clarify closed cockpit single seat car allowance #34144wordingwordingP2 closed cockpit single seat cars now prohibited unless specifically allowed in Table 1.
FE Update FE SADEV Transmission Rule #33883wordingwordingFE SADEV transmission ratios removed from review notice prior to sealing date.
P1 E&O - Correct dimensional equivalents #34018wordingwordingP1 cockpit length dimension corrected from 23.662 to 23.622 inches; height and extension limits clarified with metric-imperial equivalents.
P2 Remove redundant effective date language and update engine table #34012wordingwordingP2 engine table wording updated; redundant effective date language removed.
P2 E&O - Correct dimensional equivalents #34038engineslowerP2 motorcycle engines: 2011+ Kawasaki restrictor reduced to 34mm, minimum weight raised to 1100 lbs; 2009+ other brands weight raised to 1100 lbs.
Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta ST23MAR102023-03-10
1:22.533Lucian Pancea · fastest of 4 · top 4 within 4.2s-1.480s (-1.76%)
1:23.804Lucian Pancea · fastest of 4 · top 4 within 4.6s+0.733s (+0.88%)
146.5Lucian Pancea-3.5 mph (-2.4%)
1:18.122Todd Vanacore · fastest of 5 · top 5 within 13.9s+0.356s (+0.46%)
1:19.934Jean-Luc Liverato · fastest of 3 · top 3 within 1.0s+2.410s (+3.11%)
152.2Jean-Luc Liverato-0.8 mph (-0.5%)
-3.870squal -4.411s
95.4%qual 94.7%
17 rule changes (P2: 7, FE: 5, P1: 5)2 aero · 1 cars added · 1 engine · 1 induction · 1 tyres & wheels · 11 wording · P1 suspension covers must have symmetrical upper and lower surfaces, no airfoil shaping, cannot angle for downforce. · Sebeco NP01-EVO and Elan NP01 Mazda 2.0L MZR added to P2, 1600 lb minimum, no restrictor required. · P2 Radical SR3/SR4/Cup/Club Sport/Pro-Sport/PR6 removes assisted shifting requirement across all spec lines. · P2 chassis rules clarified to allow composite materials in non-fully-composite construction; anti-intrusion panel attachment standardized; Stohr and converted F600 cars added with specific allowances. · Unable to summarize: the change to P2 Engine Table Spec Line B.1 is not detailed in the provided text. · P1 aerodynamic devices limited to 1cm below lower surfaces rear of front axle; body panels covering suspension cannot be airfoil-shaped. · FE drivers may now adjust manual brake bias during racing. · FE front and rear wing assembly mounting and adjustment rules clarified; Gurney flap specifications and attachment methods detailed. · P1 forced induction banned: turbocharging and supercharging no longer allowed. · FE engine heat shield and insulation material now permitted to protect fuel cell, filter, rail, and lines. · P1 motorcycle-based engines with individual throttle bodies must install flat plate restrictors within 4 inches of primary butterfly. · FE tires must be run as delivered in sets of 4. · FE master cylinder specifications clarified: Girling front .700" piston WM802005, rear .750" WM802006. · P1 bodywork rules clarified: cycle fenders prohibited, side body minimum height at front axle centerline required, air ducting for downforce banned. · P2 chassis construction rules clarified: fully composite or partially composite requiring composite for mobility allowed; partial composite must roll without composite parts. · P2 classification wording cleaned up in GCR section 9.1.8.C and Contents. · P2 Oldsmobile cam rules clarify aftermarket manufacturer requirements; wording only.showhide
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.
P2 Request to Classify Sebeco NP01 #33378cars addedcars addedSebeco NP01-EVO and Elan NP01 Mazda 2.0L MZR added to P2, 1600 lb minimum, no restrictor required.
P2 Radical spec line clarifications #33485wordingwordingP2 Radical SR3/SR4/Cup/Club Sport/Pro-Sport/PR6 removes assisted shifting requirement across all spec lines.
P2 E&O original class intent #33519wordingwordingP2 chassis rules clarified to allow composite materials in non-fully-composite construction; anti-intrusion panel attachment standardized; Stohr and converted F600 cars added with specific allowances.
P2 Update Engine Table Spec Line B.1 #33608engineunclearUnable to summarize: the change to P2 Engine Table Spec Line B.1 is not detailed in the provided text.
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.
FE Brake bias adjuster clarification #33084wordingwordingFE drivers may now adjust manual brake bias during racing.
FE FE Front and Rear Wing Update & Clarification #33089wordingwordingFE front and rear wing assembly mounting and adjustment rules clarified; Gurney flap specifications and attachment methods detailed.
P1 E&O clarification regarding forced induction #33123inductionslowerP1 forced induction banned: turbocharging and supercharging no longer allowed.
FE Engine Heat Shield & Insulation #33019wordingwordingFE engine heat shield and insulation material now permitted to protect fuel cell, filter, rail, and lines.
P1 Clarify authorization to use flat plate intake restrictor #32964wordingwordingP1 motorcycle-based engines with individual throttle bodies must install flat plate restrictors within 4 inches of primary butterfly.
FE Update FE/FE2 Tire Rule #32613tyres & wheelstyres & wheelsFE tires must be run as delivered in sets of 4.
FE Master cylinder clarification #32669wordingwordingFE master cylinder specifications clarified: Girling front .700" piston WM802005, rear .750" WM802006.
P1 E&O Clarification of Bodywork Rules #32468wordingwordingP1 bodywork rules clarified: cycle fenders prohibited, side body minimum height at front axle centerline required, air ducting for downforce banned.
P2 E&O Clarification of Chassis Construction Requirements #32469wordingwordingP2 chassis construction rules clarified: fully composite or partially composite requiring composite for mobility allowed; partial composite must roll without composite parts.
P2 Clean up P2 wording #32525wordingwordingP2 classification wording cleaned up in GCR section 9.1.8.C and Contents.
P2 After Market to Aftermarket #32373wordingwordingP2 Oldsmobile cam rules clarify aftermarket manufacturer requirements; wording only.
Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta ST22MAR122022-03-12
1:24.013Robert Iversen · fastest of 6 · top 5 within 3.1s-3.393s (-3.88%)
1:23.071Robert Iversen · fastest of 6 · top 5 within 4.0s-3.049s (-3.54%)
150.1Robert Iversen+13.2 mph (+9.6%)
1:17.766Chip Romer · fastest of 5 · top 5 within 2.3s-0.095s (-0.12%)
1:17.524Chip Romer · fastest of 5 · top 5 within 2.3s-0.895s (-1.14%)
153.0John Mcaleer+0.9 mph (+0.6%)
-5.547squal -6.247s
93.3%qual 92.6%
27 rule changes (P2: 13, FE: 4, P1: 10)4 engine · 2 aero · 2 cars added · 1 tyres & wheels · 1 weight · 17 wording · P2 adds Beasley B2 spec line with 1350 lbs, Mazda 12A, 40.5mm venturi, 16.5in wing. · P2 wing specs correct terminology from 'cord' to 'chord' for 16.5in single or dual element wings. · P2 Converted F5 cars reclassified as Converted F500 cars; suspension must comply with F500 requirements, minimum width 55 inches. · P2 motorcycle engines increase to 1505cc max, two-stroke to 1205cc max; automotive engines gain 50 lbs minimum weight to 1350. · P1 2-cycle 6-cylinder displacement increases to 1725 cc, restrictor shrinks to 40mm, minimum weight drops to 1275 lbs. · P2 Control Area definition narrowed; aerodynamic attachments and vertical structures like turning vanes now prohibited. · FE2 Enterprise windscreen restricted to P/N WM137000; racer's tape allowed for crash damage repair, body panel securing, but not taping of body seams. · P2 Engine Table Spec Line B.1 changed effective 1-1-22, details not provided in excerpt. · P2 Control Area definition clarified: floor extensions and aerodynamic attachments on bottom or top side now explicitly included. · 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. · P2 CN Honda K20A-FD2 engine rebuild rules clarified: machining prohibition replaced with specific restrictions on balancing, porting, polishing, valve jobs, cylinder honing. · P1 adds 1355cc motorcycle-based engine spec line with no restrictor required, minimum weight 1075 lbs. · Converted F5 cars in P2 minimum width reduced to 55 inches from F5 spec. · P2 clarifies minimum body width requirement between front and rear wheels for Ralt RT40, RT41, Swift 008, 014. · FE removes tire marking and qualifying session requirements for wet race starts; rain tire rules simplified. · FE radiator screens clarified: may not protrude more than ¼ inch in front of sidepods. · FE radiator screens allowed and recommended, positioned no more than ¼ inch from sidepod front vertical plane. · 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. · P2 tonneau covers now allowed to meet minimum dimensions; equipment attachment requirements clarified. · P2 multiple chassis models remove effective dates from Table 1 specifications. · P2 engines limited to 4 valves per cylinder maximum across all three spec lines. · 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.showhide
P2 Add spec line for Beasley B2 #32147cars addedcars addedP2 adds Beasley B2 spec line with 1350 lbs, Mazda 12A, 40.5mm venturi, 16.5in wing.
P2 E&O Table 1 spec line wing terminology #32148wordingwordingP2 wing specs correct terminology from 'cord' to 'chord' for 16.5in single or dual element wings.
P2 E&O class name #32196wordingwordingP2 Converted F5 cars reclassified as Converted F500 cars; suspension must comply with F500 requirements, minimum width 55 inches.
P2 E&O Engine section #31969enginefasterP2 motorcycle engines increase to 1505cc max, two-stroke to 1205cc max; automotive engines gain 50 lbs minimum weight to 1350.
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.
P2 E&O letter #31539 – Control Area definition #31783aeroslowerP2 Control Area definition narrowed; aerodynamic attachments and vertical structures like turning vanes now prohibited.
FE Two FE2 Rule Updates #31524wordingwordingFE2 Enterprise windscreen restricted to P/N WM137000; racer's tape allowed for crash damage repair, body panel securing, but not taping of body seams.
P2 BoP adjustment effective 1-1-22 #31538wordingunclearP2 Engine Table Spec Line B.1 changed effective 1-1-22, details not provided in excerpt.
P2 E&O clarification of "Control Area" definition #31539wordingwordingP2 Control Area definition clarified: floor extensions and aerodynamic attachments on bottom or top side now explicitly included.
P1 Move 2000cc and 2300cc engine options to individual spec lines #31012wordingwordingP1 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.
P2 P2 CN Engine Rebuild Clarification #31000wordingwordingP2 CN Honda K20A-FD2 engine rebuild rules clarified: machining prohibition replaced with specific restrictions on balancing, porting, polishing, valve jobs, cylinder honing.
P1 Add 1355cc spec line #30890cars addedcars addedP1 adds 1355cc motorcycle-based engine spec line with no restrictor required, minimum weight 1075 lbs.
P2 F5 P2 Conversion #30856aerofasterConverted F5 cars in P2 minimum width reduced to 55 inches from F5 spec.
P2 Clarify minimum body width requirement #30859wordingwordingP2 clarifies minimum body width requirement between front and rear wheels for Ralt RT40, RT41, Swift 008, 014.
FE FE Tire Rule Changes #30754tyres & wheelstyres & wheelsFE removes tire marking and qualifying session requirements for wet race starts; rain tire rules simplified.
FE Radiator Screens Clarification #30792wordingwordingFE radiator screens clarified: may not protrude more than ¼ inch in front of sidepods.
FE FE Radiator Screens #30575wordingwordingFE radiator screens allowed and recommended, positioned no more than ¼ inch from sidepod front vertical plane.
P1 E&O tonneau cover provision in cockpit opening section #30458wordingwordingP1 tonneau cover wording clarified: equipment must be securely attached; covers allowed for minimum dimensions.
P1 Update Spec Line B Notes #30498wordingwordingP1 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 #30499wordingwordingP1 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.
P2 E&O tonneau cover provision in cockpit opening section #30459wordingwordingP2 tonneau covers now allowed to meet minimum dimensions; equipment attachment requirements clarified.
P2 Remove effective dates in Table 1 #30468wordingwordingP2 multiple chassis models remove effective dates from Table 1 specifications.
P2 E&O Maximum Valves Per Cylinder #30560engineengineP2 engines limited to 4 valves per cylinder maximum across all three spec lines.
P1 Clean up Spec Line A notes section #30424wordingwordingP1 Spec Line A clarifies carburetor induction only, one per cylinder, balance tubes not allowed.
P1 Clean up Spec Line H notes section #30425wordingwordingP1 Spec Line H notes clarify peripheral port or bridgeport allowed.
Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta ST21MAR192021-03-19
1:27.406Lucas Mann · fastest of 4 · top 4 within 5.9s
1:26.120Lucian Pancea · fastest of 3 · top 3 within 3.8s
136.9Lucian Pancea
1:17.861John Mcaleer · fastest of 5 · top 5 within 7.0s
1:18.419John Mcaleer · fastest of 5 · top 5 within 6.9s
152.1John Mcaleer
-7.701squal -9.545s
91.1%qual 89.1%
48 earlier rule changes on record, in force before Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta (from 2019)8 induction · 5 cars added · 4 engine · 2 removed · 2 tyres & wheels · 2 weight · 1 aero · 1 suspension & brakes · 22 wording · 1 other · 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. · P2 adds new spec line for 2-cycle 3-cylinder engine up to 820cc with 10 front and 14-15 rear wheel width. · FE front springs increase to 800 lbs ±25 lbs, rear springs decrease to 900 lbs ±25 lbs, Hypercoil parts required. · P2 Honda K20A-FD2 intake restrictor reduced from 55mm to 50mm, making cars faster. · FE Gurney flap specs clarified: front wing secondary elements limited to .500" ± .030", wing elements to .250" ± .030". · P2 rear wing requirements clarified: standard wing 6×12 inches, end plates 14-inch square; alternate 110cm width wing 9×18 inches, end plates 14×18 inches. · FE Gurney flap wording clarified: permitted on front wing secondary elements only, not main plane. · Elan NP01 classified in P2 Table 1 as Spec Line car with 2000cc displacement and P2 Engine Table restrictor. · FE spring rule update effective date moved from June 1 to November 1, 2020. · P1 intake manifolds unrestricted on engines without flat plate restrictor; plenums and balance pipes prohibited on individual runner manifolds with restrictor. · P2 Enterprises Sports Racer adds 55mm flat plate intake restrictor Part # WM303013 as alternative to SIR. · P2 Enterprise Sports Racer 2.3L engine now requires SIR or Flat Plate restrictor sized in 0.5mm increments. · P2 fly-by-wire throttle control wording clarified: stock ECUs with drive-by-wire must activate original throttle shaft mechanism. · P1 sealed DP02-spec 2.0L Mazda MZR Elan removal date extended from 1/1/2020 to 1/1/2021. · FE2 class created for 2.0L MZR engine at 1250 lbs minimum; FE 2.3L becomes Regional only through 2019 Runoffs. · 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. · P2 adds BMW to motorcycle-based engine options in 4-cycle line alongside Kawasaki, Suzuki, Yamaha, Honda. · FE and FE2 minimum weight increased to 1270 lbs including driver; spring options and tire warmer ban added. · FE wet tire rear width increases from 7.5 to 8.0 inches, Hoosier 44196 W3. · P2 Honda K20A-FD2 non-composite chassis must use 55mm flat plate intake restrictor at 1500 lbs minimum weight. · P2 motorcycle engines: Stock restrictor 36.5mm to 35mm, modified 37.5mm to 34mm; B.5 restrictor 37.5mm to 33mm. All weights increase 25 lbs. · P1 traction control prohibited in GCR section 9.1.8.C.H. · FE removes American Racer tires, mandates Hoosier dry 22.0 x 8.0-13 FE front and 22.0 x 10.0-13 FE rear. · 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. · P2 cars limited to power application on maximum two wheels, effective 2019-07-01. · P2 Enterprise minimum weight increases to 1375 lbs; peak horsepower of sealed ESR engine reduced per CRB specification. · FE anti-roll bars may run disconnected; one link removable front, rear, or both for safety. · FE and FE2 Enterprise bubble tail P/N WM138014 newly allowed for both classes. · P1 anti-intrusion panels now allowed anywhere on chassis sides, previously restricted. · P1 bodywork wording corrected: 'a passenger' becomes 'passenger' in three GCR sections. · P1 Engine Table reference cleaned up; no performance change. · P1 Mazda Renesis Rotary removed from Engine Table specification line. · P1 Staudacher and Honda K20A-FD2 engine table language cleaned up; no performance changes. · FE wet tires updated: front Hoosier 44195 W3 and rear 44217 W3, WET designation removed. · P1 closed cockpit single-seat cars moved from subsection J.5 to subsection B.4; prohibition unchanged. · P2 stock engine restrictor shrinks to 35.0mm and weight rises to 1025 lbs; modified engine restrictor to 34.0mm, weight to 1125 lbs; line B.5 restrictor to 33.0mm, weight to 1185 lbs. · P2 Line A.1 restrictor reduced from 40mm to 38mm. · 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. · P2 Spec Line cars now allow 1345cc Hayabusa stock engines at 1050 lbs with 30mm restrictor. · P2 Group CN Honda K20A-FD2 55mm restrictor implementation delayed from 1/1/2019 to 3/1/2019. · P2 Honda K20A-FD2 in CN chassis must use stock intake manifold with 64mm throttle body and 55mm restrictor at 1500 lbs minimum weight.showhide
P1 E&O restrictor terminology #30285wordingwordingP1 engine table updates terminology from inlet to intake restrictor across multiple spec lines.
P2 Add a new spec line for a 2-cycle, 3-cylinder engine up to 820cc #30272cars addedcars addedP2 adds new spec line for 2-cycle 3-cylinder engine up to 820cc with 10 front and 14-15 rear wheel width.
FE FE / FE2 Spring Updates #29689suspension & brakessuspension & brakesFE front springs increase to 800 lbs ±25 lbs, rear springs decrease to 900 lbs ±25 lbs, Hypercoil parts required.
P2 Balance of Performance adjustments effective 01-01-2021 #29822inductionfasterP2 Honda K20A-FD2 intake restrictor reduced from 55mm to 50mm, making cars faster.
FE FE Gurney Flap Spec Update #29445wordingwordingFE Gurney flap specs clarified: front wing secondary elements limited to .500" ± .030", wing elements to .250" ± .030".
P2 E&O clarification of P2 rear wing requirements #29205aeroaeroP2 rear wing requirements clarified: standard wing 6×12 inches, end plates 14-inch square; alternate 110cm width wing 9×18 inches, end plates 14×18 inches.
FE FE Gurney flap wicker clarification #28885wordingwordingFE Gurney flap wording clarified: permitted on front wing secondary elements only, not main plane.
P2 Classify Elan NP01 in P2 Table 1 #28812cars addedcars addedElan NP01 classified in P2 Table 1 as Spec Line car with 2000cc displacement and P2 Engine Table restrictor.
FE FE spring rule update changed to November 1, 2020 #28814wordingwordingFE spring rule update effective date moved from June 1 to November 1, 2020.
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.
P2 SCCA Enterprises ESR / P2 engine restrictor testing #28669engineengineP2 Enterprises Sports Racer adds 55mm flat plate intake restrictor Part # WM303013 as alternative to SIR.
P2 Add ESR inlet restrictor #27869inductionslowerP2 Enterprise Sports Racer 2.3L engine now requires SIR or Flat Plate restrictor sized in 0.5mm increments.
P2 Request for Fly by Wire Rule Wording Change #28247wordingwordingP2 fly-by-wire throttle control wording clarified: stock ECUs with drive-by-wire must activate original throttle shaft mechanism.
P1 Extend date for removing sealed DP02-spec 2.0L option #28046wordingwordingP1 sealed DP02-spec 2.0L Mazda MZR Elan removal date extended from 1/1/2020 to 1/1/2021.
FE Request for FE / FE2 preparation rules update #27722cars addedcars addedFE2 class created for 2.0L MZR engine at 1250 lbs minimum; FE 2.3L becomes Regional only through 2019 Runoffs.
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.
P2 Request for addition of BMW Engine in P2 Engine Table #27821cars addedcars addedP2 adds BMW to motorcycle-based engine options in 4-cycle line alongside Kawasaki, Suzuki, Yamaha, Honda.
FE FE / FE2 Update Rules #27624weightslowerFE and FE2 minimum weight increased to 1270 lbs including driver; spring options and tire warmer ban added.
FE FE Wet Tire E&O #27365tyres & wheelsfasterFE wet tire rear width increases from 7.5 to 8.0 inches, Hoosier 44196 W3.
P2 Update Engine Table Line E notes #27414inductionslowerP2 Honda K20A-FD2 non-composite chassis must use 55mm flat plate intake restrictor at 1500 lbs minimum weight.
P2 Update P2 Engine Table spec lines to reflect 3/1/2019 #27254inductionslowerP2 motorcycle engines: Stock restrictor 36.5mm to 35mm, modified 37.5mm to 34mm; B.5 restrictor 37.5mm to 33mm. All weights increase 25 lbs.
P1 E&O Transmissions #27098wordingunclearP1 traction control prohibited in GCR section 9.1.8.C.H.
FE FE Tire Update #27029tyres & wheelsunclearFE removes American Racer tires, mandates Hoosier dry 22.0 x 8.0-13 FE front and 22.0 x 10.0-13 FE rear.
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.
P2 E&O Transmissions #27006otherslowerP2 cars limited to power application on maximum two wheels, effective 2019-07-01.
P2 Request to restrict all cars #26246weightslowerP2 Enterprise minimum weight increases to 1375 lbs; peak horsepower of sealed ESR engine reduced per CRB specification.
FE FE Anti-Roll Bar Clarification #26912wordingwordingFE anti-roll bars may run disconnected; one link removable front, rear, or both for safety.
FE FE / FE2 Updated Bubble Tail Rule #26913cars addedcars addedFE and FE2 Enterprise bubble tail P/N WM138014 newly allowed for both classes.
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.
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.
P1 Clean Up Engine Table Language #26590wordingwordingP1 Staudacher and Honda K20A-FD2 engine table language cleaned up; no performance changes.
FE Request to Update Hoosier Rain Tire Part Number for the FE cars #26235wordingwordingFE wet tires updated: front Hoosier 44195 W3 and rear 44217 W3, WET designation removed.
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.
P2 Change Engine Table Lines B.1 & B.5 #25777inductionslowerP2 stock engine restrictor shrinks to 35.0mm and weight rises to 1025 lbs; modified engine restrictor to 34.0mm, weight to 1125 lbs; line B.5 restrictor to 33.0mm, weight to 1185 lbs.
P2 Change Line A.1 restrictor size #26429inductionslowerP2 Line A.1 restrictor reduced from 40mm to 38mm.
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.
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.
P2 Request to Allow 1345cc Hayabusa Engines for Spec Line P2 Cars #25595enginefasterP2 Spec Line cars now allow 1345cc Hayabusa stock engines at 1050 lbs with 30mm restrictor.
P2 Change CN inlet restrictor implementation date #25816wordingwordingP2 Group CN Honda K20A-FD2 55mm restrictor implementation delayed from 1/1/2019 to 3/1/2019.
P2 Clarify Honda K20A-FD2 parts requirement #25950inductionslowerP2 Honda K20A-FD2 in CN chassis must use stock intake manifold with 64mm throttle body and 55mm restrictor at 1500 lbs minimum weight.
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 P2" is the class's best as a share of P2'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 P2'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.