One row per driver and car (a driver who changed cars has a row for each). Each cell is that driver's best in that car across the selected events, with the session it was set in. Best 5-lap stint is the mean of the driver's quickest five consecutive race laps, and consistency is how far their median race lap sat behind their best in that race (small is a driver who does it every lap); both come from the race with the best stint. The fastest in each column is purple, and a car whose best lap is more than 115% of the fastest in its class is greyed (marked ">115%" beside the driver) and left out of the colour scale. Click a column to sort, a row to highlight it.
Theoretical lap is the sum of the best sectors, whichever laps they came from, and never slower than the best lap (where a car's fastest laps were recorded without sector times, its best lap is used). The 115% mark is about the car's best lap only: a car whose best lap is within 115% of the fastest in its class is never marked. Greyed sectors with no theoretical lap mean the sector times on file do not add up to a believable lap. Letters refer to the events above; Q is qualifying, R a race.
Sectors
S1 SF → IM1
S2 IM1 → IM2
S3 IM2 → SF
SPd IM2 → IM3 0.02 mi
Sectors are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.
By car
Car
Class
Drivers
Lap
Qual
Race
Trap
S1
S2
S3
Piper DF05
FF
1
1:31.000Porter Aiken
1:31.000Porter Aiken
1:31.797Porter Aiken
130.3Porter Aiken
34.534Porter Aiken
33.016Porter Aiken
23.450Porter Aiken
Mygale SJ14H
FF
1
1:31.059Robert Albani
1:35.262Robert Albani
1:31.059Robert Albani
135.6Robert Albani
33.334Robert Albani
33.590Robert Albani
23.945Robert Albani
Swift DB6
FF
1
1:31.242John Robinson II
1:32.097John Robinson II
1:31.242John Robinson II
134.3John Robinson II
34.930John Robinson II
32.498John Robinson II
23.467John Robinson II
Van Diemen RF00
FF
1
1:31.334Chris Smith
1:34.065Chris Smith
1:31.334Chris Smith
134.3Chris Smith
34.806Chris Smith
32.940Chris Smith
23.427Chris Smith
Mygale SJ13
FF
2
1:31.374Sebastian Mateo Naranjo
1:31.374Sebastian Mateo Naranjo
1:31.587Sebastian Mateo Naranjo
133.1Sebastian Mateo Naranjo
34.756Sebastian Mateo Naranjo
32.943Sebastian Mateo Naranjo
23.399Sebastian Mateo Naranjo
Van Dieman F1600
FF
2
1:31.412Joe Colasacco
1:32.745Joe Colasacco
1:31.412Joe Colasacco
134.5Joe Colasacco
34.483Joe Colasacco
32.731Joe Colasacco
23.512Joe Colasacco
Van Dieman FF
FF
1
1:31.412Joe Colasacco
1:32.745Joe Colasacco
1:31.412Joe Colasacco
134.5Joe Colasacco
34.483Joe Colasacco
32.731Joe Colasacco
23.512Joe Colasacco
Van Dieman F1600
FF
1
1:32.266Trevor Russell
1:34.162Trevor Russell
1:32.266Trevor Russell
130.5Trevor Russell
34.751Trevor Russell
33.519Trevor Russell
23.568Trevor Russell
Mygale SJ14\Honda
FF
1
1:31.421Callum Baxter
1:32.506Callum Baxter
1:31.421Callum Baxter
135.8Callum Baxter
34.649Callum Baxter
32.985Callum Baxter
23.531Callum Baxter
Mygale F1600
FF
5
1:31.562Dillon Defonce
1:32.437David Ybarra
1:31.562Dillon Defonce
134.3Dillon Defonce
34.482Dillon Defonce
32.966Dillon Defonce
23.323Dillon Defonce
Mygale GR
FF
2
1:31.574Ely Navarro
1:31.621Ely Navarro
1:31.574Ely Navarro
130.3Ely Navarro
34.547Ely Navarro
33.192Ely Navarro
23.573Ely Navarro
Mygale SJ2014
FF
1
1:32.019Sebastian Mateo Naranjo
1:32.019Sebastian Mateo Naranjo
1:32.061Sebastian Mateo Naranjo
119.9Sebastian Mateo Naranjo
34.874Sebastian Mateo Naranjo
33.156Sebastian Mateo Naranjo
23.547Sebastian Mateo Naranjo
Spectrum 14H
FF
1
1:32.421David H Livingston Jr
1:33.339David H Livingston Jr
1:32.421David H Livingston Jr
131.1David H Livingston Jr
35.020David H Livingston Jr
33.218David H Livingston Jr
23.745David H Livingston Jr
Piper DF-5
FF
1
1:32.974Michael Bulzacchelli
1:34.842Michael Bulzacchelli
1:32.974Michael Bulzacchelli
129.3Michael Bulzacchelli
35.258Michael Bulzacchelli
33.608Michael Bulzacchelli
23.786Michael Bulzacchelli
Piper DL7/Honda
FF
4
1:33.448Antonio Costantino
1:33.999Camryn Reed
1:33.448Antonio Costantino
128.6Camryn Reed
35.684Antonio Costantino
33.551Calum Dunbar
23.904Antonio Costantino
Piper DL7/Honda
FF
2
1:33.448Antonio Costantino
1:34.562Antonio Costantino
1:33.448Antonio Costantino
122.0Calum Dunbar
35.684Antonio Costantino
33.551Calum Dunbar
23.904Antonio Costantino
Piper DL7
FF
1
1:33.999Camryn Reed
1:33.999Camryn Reed
1:34.531Camryn Reed
128.6Camryn Reed
35.955Camryn Reed
33.767Camryn Reed
23.995Camryn Reed
Piper DL7\Honda
FF
1
1:36.474Brian Graham
1:36.690Brian Graham
1:36.474Brian Graham
125.6Brian Graham
36.711Brian Graham
34.537Brian Graham
24.803Brian Graham
Citation F1600
FF
1
1:34.549Miles Crabbe
1:34.876Miles Crabbe
1:35.412Miles Crabbe
125.2Miles Crabbe
35.861Miles Crabbe
34.169Miles Crabbe
24.134Miles Crabbe
Van Diemen RF02
FF
1
1:35.150Kevin Brumbaugh
1:36.770Kevin Brumbaugh
1:35.150Kevin Brumbaugh
129.5Kevin Brumbaugh
36.763Kevin Brumbaugh
33.720Kevin Brumbaugh
24.546Kevin Brumbaugh
Mazda MX-5
STL
5
1:35.212Danny Steyn
1:36.356Danny Steyn
1:35.212Danny Steyn
125.8Danny Steyn
35.919Danny Steyn
34.982Danny Steyn
24.305Danny Steyn
Acura Integra
STL
2
1:36.988Mike Taylor
1:36.988Mike Taylor
1:37.207Mike Taylor
127.1Mike Taylor
36.837Mike Taylor
0.710Mike Taylor
24.656Mike Taylor
Acura Integra Type R
STL
1
1:37.238Jon Sewell
1:37.238Jon Sewell
1:38.131Jon Sewell
123.6Jon Sewell
37.186Jon Sewell
0.701Jon Sewell
24.728Jon Sewell
Mazda Miata
STL
27
1:37.270Nick Leverone
1:37.270Nick Leverone
1:37.930Nick Leverone
124.9Nick Leverone
36.921Nick Leverone
0.745Thomas Paolino
24.892Nick Leverone
Mazda Miata
STL
25
1:37.270Nick Leverone
1:37.270Nick Leverone
1:37.930Nick Leverone
124.9Nick Leverone
36.921Nick Leverone
0.745Thomas Paolino
24.892Nick Leverone
Mazda Miata (1999)
STL
1
1:48.458Jason Greenwood
1:48.458Jason Greenwood
106.3Jason Greenwood
41.121Jason Greenwood
39.941Jason Greenwood
27.777Jason Greenwood
Mazda Miata (2001)
STL
1
1:50.868Brayton Williams
1:51.399Brayton Williams
1:50.868Brayton Williams
103.4Brayton Williams
42.427Brayton Williams
40.073Brayton Williams
27.993Brayton Williams
Spectrum 014H
FF
1
1:37.862Sam Lockwood
1:37.862Sam Lockwood
1:38.186Sam Lockwood
122.9Sam Lockwood
37.748Sam Lockwood
34.842Sam Lockwood
24.845Sam Lockwood
Honda Civic
STL
1
1:37.935Derek Ketchie
1:38.252Derek Ketchie
1:37.935Derek Ketchie
126.5Derek Ketchie
37.282Derek Ketchie
0.988Derek Ketchie
24.938Derek Ketchie
Honda CRX
STL
1
1:38.090Jose Osiris Pena
1:38.090Jose Osiris Pena
1:38.269Jose Osiris Pena
125.2Jose Osiris Pena
37.661Jose Osiris Pena
35.135Jose Osiris Pena
25.131Jose Osiris Pena
Acura Integra GSR
STL
1
1:38.779Zsolt Ferenczy
1:39.888Zsolt Ferenczy
1:38.779Zsolt Ferenczy
123.8Zsolt Ferenczy
37.635Zsolt Ferenczy
0.776Zsolt Ferenczy
25.006Zsolt Ferenczy
Honda S2000
STL
3
1:38.933Gonzalo Aponte
1:38.933Gonzalo Aponte
1:39.988Gonzalo Aponte
121.1Austin Hilliard
37.827Gonzalo Aponte
35.727Gonzalo Aponte
25.027Gonzalo Aponte
Ford Focus ZX3
STL
1
1:40.566Michael Sperber
1:41.613Michael Sperber
1:40.566Michael Sperber
124.2Michael Sperber
38.466Michael Sperber
36.110Michael Sperber
25.859Michael Sperber
Ford Mustang
STL
1
1:40.762Nathan Pring
1:41.724Nathan Pring
1:40.762Nathan Pring
121.9Nathan Pring
38.281Nathan Pring
36.270Nathan Pring
25.784Nathan Pring
Toyota GT86
STL
1
1:41.142Javier Sanchez
1:41.554Javier Sanchez
1:41.142Javier Sanchez
111.8Javier Sanchez
38.714Javier Sanchez
36.468Javier Sanchez
25.659Javier Sanchez
Mazda RF
STL
1
1:41.430David Palfenier
1:41.430David Palfenier
1:46.267David Palfenier
119.1David Palfenier
38.110David Palfenier
37.672David Palfenier
26.252David Palfenier
Swift DB-3
FF
1
1:41.600Dan Carney
1:52.195Dan Carney
1:41.600Dan Carney
114.0Dan Carney
41.271Dan Carney
36.720Dan Carney
27.511Dan Carney
Mazda RX-7
STL
1
1:46.639Neil Gueldner
1:47.935Neil Gueldner
1:46.639Neil Gueldner
120.1Neil Gueldner
41.878Neil Gueldner
37.283Neil Gueldner
27.230Neil Gueldner
The best any driver of each car managed across the selected events, with who set it. Spellings and model years of the same car are grouped; click a row marked ▸ to see each version. Grouping is worked out from the names, so tell us if two cars are wrongly merged or split.
Rule changes between these events
Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta → Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta 2023-03-10 to 2024-03-08
wordingSTL ITA/ITS RX7 and 1985+ ITA/ITS/ITB/ITC vehicles clarified to conform to section 9.1.4.2 tire specifications.
As printed in Fastrack
In STL Spec Lines, Table B: Alternate Vehicle and Engine Allowances, change Notes as follows: ITA-spec and ITS-spec RX7: "Must completely conform to ITCS specifications. Tires must conform to 9.1.4, Tires & Wheels. Tires must also conform to 9.1.4.2.Tires." ITS, ITA, ITB, or ITC vehicles (1985- ): "Must completely conform to ITCS specifications. Tires must conform to 9.1.4, Tires & Wheels. Tires must also conform to 9.1.4.2.Tires."
STL Alternate Carburetor Request for 79-85 RX7 12a
unclearSTL Mazda RX-7 12A (79-85) now allows auto-type 2 bbl with 42mm choke(s) on dual-y manifold as alternate to stock Nikki 4 bbl.
As printed in Fastrack
In STL Table B: Alternate Vehicle and Engine Allowances, Mazda RX-7 12A (79-85), change Notes as follows: "Street Porting of the engine only. Bridge porting, peripheral porting, and eyelash porting are prohibited. Contact SCCA National Office for details of Street porting. Stock Nikki 4 bbl carburetor on a stock manifold only. or auto-type 2 bbl w/42mm choke(s) on a “dual-y” manifold. Allow the standard removal of emissions related components, and allow air and fuel jets to be corrected. Modification of the water jacket in the area of the spark plug for cooling purposes is permitted."
wordingFF Honda Fit gains Fast Forward FF800-100 oversize piston ring pack option.
As printed in Fastrack
In FF, GCR section 9.1.1.B.14.e.3.a, add the following: "The standard ring pack, PN 13011-RB1-004 (Riken) or 13011-RB1-006 (Nippon), or the oversize ring pack, PN 13021-RB7-Z01 (Riken), or 13021-RB7-Z02 (Nippon), or FF800-100 (Fast Forward), may be used."
wordingSTL and STU power steering rules clarified to permit electric-assisted and hydraulic-assisted steering systems.
As printed in Fastrack
In GCR, Section 9.1.4.M.16., change as follows: "Power steering may be modified in any of the following ways: a. disconnected , pump, belt, pulley, and hoses may be removed. Hoses may also be looped. Steering rack or box may be modified internally to work without pump. b. an OEM manual steering rack for that model may be fitted c. an electric power steering pump may be fitted d. an OEM electric-assisted steering system may be used or any column mounted electric steering assist may be used e. an OEM hydraulic-assisted steering system may be used"
fasterSTL Acura/Honda B-series and Mazda MZR restrictors reduced 2mm; minimum weights down 25–75 lbs for 1900–2000cc engines.
As printed in Fastrack
In GCR, 9.1.4.H.1., change as follows: "Minimum weights for cars with normally aspirated piston engines will be determined by 1.35 lbs/cc displacement for the installed engine (see the following table). Displacement is the factory displacement for the installed engine. For the purpose of weight assignment, engine displacement will be rounded to the nearest 50cc (e.g., 2176cc = 2200cc and 2175cc = 2150cc)." In GCR, 9.1.4.H.1., change Minimum Weight on Chart as follows: Factory Engine Displacement 1900: "Effective 3-1-24: 2565 2540" Factory Engine Displacement 1950: "Effective 3-1-24: 2633 2583"
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Factory Engine Displacement 2000: "Effective 3-1-24: 2700 2625" In GCR, 9.1.4.H.3., change as follows: "Front wheel drive cars with a strut type front suspension may reduce their minimum weight by 2.5 percent. Effective 3- 1-24: Front wheel drive cars with 95" or less wheelbase must add 1.25% to their minimum weight." In STL Spec Lines, change Notes as follows: Acura/Honda B16: "Effective 3-1-24: 53 51mm" Acura/Honda B17: "Effective 3-1-24: 53 51mm" Acura/Honda B18C1: "Effective 3-1-24: 53 51mm" Acura/Honda B18C (JDM Type R), B18C5 (USDM Type R), B18C6 (UK and Euro Type R), B18C7 (Australia Type R): "Effective 3-1-24:52 50mm" Mazda MZR: "Effective 3-1-24: 52 50mm"
slowerSTL Mazda 12A must keep 5th and 6th intake port actuators and valves, no longer allowed removal or disabling.
As printed in Fastrack
In STL Spec Lines, Table A, Mazda 12A, change Notes as follows: "The 5th and 6th intake port actuators and valves may be removed or disabled."
Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta → Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta 2024-03-08 to 2025-03-07
wordingFF VTEC activation valve must function; EGR blanking plate rule clarified with Fast Forward part numbers.
As printed in Fastrack
In FF, GCR section 9.1.1.B.14.r.1, change as follows: "All emission control devices must be removed and blocked off by the blanking plate provided by HPD or Fast Forward as noted below, except for the VTEC activation valve. The VTEC activation valve must be retained; and it must be functioning. No modifications are permitted. a. EGR Plate: Fast Forward PN: FF200-301. b. EGR Port Cover: Fast Forward PN: FF200-302."
fasterFF and FC cars with sequential gearbox must add 10 lbs. to minimum weight, down from 25 lbs.
As printed in Fastrack
In FF, GCR section 9.1.1.B.20.A.3, change as follows: "Cars running with a sequentially shifted gear box shall must add 25 10 lbs. to minimum weight." In FC, GCR section 9.1.1.B.20.B.4, change as follows: "Cars running with a sequentially shifted gear box shall must add 25 10 lbs. to minimum weight."
wordingFF Honda Fit allows Fast Forward 0.25mm oversize pistons PN FF800-110 as alternative; piston diameter spec clarified to 2.8835 inches.
As printed in Fastrack
In FF, GCR section 9.1.1.B.14.e.1, change as follows: "Honda Fit OEM standard size pistons, PN: 13010-RB1-000, or Honda Fit OEM 0.25mm oversize pistons, PN: 13020-RB7-Z00, or Fast Forward 0.25mm oversize pistons, PN: FF800-110, may be used." In GCR section 9.1.1.B.14.e.2, change as follows: "a. Maximum standard piston diameter, measured at a point 16mm from the bottom of the skirt: 73.240mm (2.8834 2.8835 inches). b. Centerline of wrist pin to crown maximum: 26.21mm (1.032 inches). c. Maximum overall height from skirt to crown edge: 47.80mm (1.882 inches).
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d. Minimum weight: 198.0 grams (6.984 ounces). e. Minimum weight of piston pin: 66 grams (2.25 ounces). f. Combined minimum weight of piston, piston pin and connecting rod: 543.5 grams (18.85 ounces). g. Combined minimum weight of piston, wrist pin, and circlips: 267 grams (9.418 ounces). h. Centerline of wrist pin to crown edge: 26.289mm (1.035 inches). i. Ring groove widths: Top ring groove: 1.003mm (0.0395 inches). Middle ring groove: 1.016mm (0.0400 inches). Oil ring groove: 1.981mm (0.0780 inches). j. Ring groove distance from wrist pin center to bottom of groove: Top ring groove: 19.63mm (0.7730 inches). Middle ring groove: 15.29mm (0.6020 inches). Oil ring groove: 10.91mm (0.4295 inches)."
STL Request to Remove Miata Hubs from General category
wordingSTL/STU: 90-05 Mazda Miata alternate front wheel hubs moved from General to specific part approval.
As printed in Fastrack
In GCR, Section 9.1.4.M.18., change as follows: "18. Allow alternate front wheel front hubs, Mazda Motorsports Development Part #0000-04-5HUB-S1, for the 90-05 Mazda Miata: Mazda Motorsports Development Part #0000-04-5HUB-S1."
FF Formula F Proposal to Invite Older Cars Via a Tire Rule Change
fasterFF allows older cars with rocker arm or outboard suspension to use bias ply slicks or VFF tires instead of radials.
As printed in Fastrack
In FF, GCR section 9.1.1.B.10.e, change as follows: "Formula F shall be limited to the following tires (front tires may not be used as rears): Dries: Front - Hoosier R60A Radial 43322 or F1600 Radial 43321 185/60R13 Rear - Hoosier R60A Radial 43327 or F1600 Radial 43326 205/60R13 Wets: Front - Hoosier Wet or W3 Radial 44421 185/60R13 Rear - Hoosier Wet or W3 Radial 44426 205/60R13
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Alternatively, Formula F cars with rocker arm suspension (e.g., Swift DB1, 1987-90 Reynard) and/or outboard suspension on at least one chassis end may use the following tires: Dries: Front - Hoosier H43130 R60A 20.0 x 6.0-13 or H43164 R60A 20.5 x 7.0-13 bias ply slick Rear – Hoosier H43307 R60A 22.5 x 7.2-13 bias ply slick Wets: Radial wets listed above or Front - Hoosier 44165 135/545-13 VFF Rear - Hoosier 44170 165/580-13 VFF Front tires may not be used as rears, and tires may not be mixed, i.e., radial tires may not be mixed with bias ply slick tires, bias ply slick tires may not be mixed with VFF tires, and radial tires may not be mixed with VFF tires."
Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta → Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta 2025-03-07 to 2026-03-06
unclearSTL Mazda MX5 Challenge minimum weight now references GCR 9.1.7.1 instead of 2500 lbs; spec components removed, only alternative tires allowed.
As printed in Fastrack
In STL Spec Lines, Table B, Mazda Spec MX5 Challenge, change as follows: Minimum Weight: "2500 See 9.1.7.1." Notes: "Mazda MX5 Challenge car must utilize the following components: Roush CNC cylinder head 0000-01-5300,Mahle standard or +0.005 0000-01-5310, OEM camshaft, 11:1 compression ratio, header 0000-06-5407-NC, exhaust 0000-06-5427-NC, cold air intake 0000- 06-5150-KT, ECU flash 0000-01-5379, Pagid front brake pads 0000-03-5104-SP or endurance pads 0000-03- 5104-EN, Pagid rear brake pads 0000-03-5114-SP or endurance pads 0000-03-5114-EN, Penske front shock 0000-04-5291-SA, Penske rear shock 0000-04-5292-SA, Penske rear mount kit 0000-04-5358, Front mount kit 0000-04-5359, Front offset bushing 0000-04-5407-NC, Eibach front springs 0000-04-9700-08, Eibach rear springs 0000-04-9400-07, Eibach helper springs 0000-04-
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9926, Eibach front sway bar 0000-04-5306-FT, Eibach rear sway bar 0000-04-5306-RR, Interior finish panels 0000-07-5822, C&R radiator/oil cooler assembly 0000-01-5504-CR, Oil cooler adapter and lines 0000-01-5511-KT, ACT clutch 0000-02-5004-G6, wheels 17x8 #0000-04-5706-GM, # 0000- 04-5706-SL, and Toyo RR 235-40-17 dry, Toyo RA1 235-40-17 wet. Alternative tires on 17x7 wheels per STL rules. No other Super Touring modifications or allowances permitted except as noted in this spec line. Must conform completely to GCR 9.1.7.1, except alternative tires (only) per STL regs allowed."
Applies to Mazda MX-5 on this page: Danny Steyn, David Palfenier, William Knight, Austin Hill, Adrian Comstock
tyres & wheelsFF adds rocker arm and outboard suspension cars optional bias ply and VFF tires; removes front-as-rear rule, adds mixing restrictions.
As printed in Fastrack
In FF, GCR section 9.1.1.B.10.e, change as follows: "Formula F shall be limited to the following tires (front tires may not be used as rears): Dries: Front - Hoosier R60A Radial 43322 or F1600 Radial 43321 185/60R13 Rear - Hoosier R60A Radial 43327 or F1600 Radial 43326 205/60R13 Wets: Front - Hoosier Wet or W3 Radial 44421 185/60R13 Rear - Hoosier Wet or W3 Radial 44426 205/60R13
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Alternatively, Formula F cars with rocker arm suspension (e.g., Swift DB1, 1987-90 Reynard) and/or outboard suspension on at least one chassis end may use the following tires: Dries: Front - Hoosier H43130 R60A 20.0 x 6.0-13 or H43164 R60A 20.5 x 7.0-13 bias ply slick or Hoosier 44165 135/545-13 VFF Rear – Hoosier H43307 R60A 22.5 x 7.2-13 bias ply slick or Hoosier 44170 165/580-13 VFF Wets: Radial wets or VFF tires listed above or Front - Hoosier 44165 135/545-13 VFF Rear - Hoosier 44170 165/580-13 VFF Front tires may not be used as rears, and tires may not be mixed, i.e., radial tires may not be mixed with bias ply slick tires, bias ply slick tires may not be mixed with VFF tires, and radial tires may not be mixed with VFF tires."
wordingFF clarifies alternative tire eligibility for cars homologated 1989 or earlier with rocker arm or outboard suspension on all four corners.
As printed in Fastrack
In FF, GCR section 9.1.1.B.10.e, change as follows: "Alternatively, Formula F cars with rocker arm suspension (e.g., 1987-90 Reynard, Swift DB1,) and/or outboard suspension on at least one chassis end homologated in 1989 or earlier with any combination of rocker arm or outboard suspension on all four corners (e.g., 1987 – 1990 Reynard, Swift DB1) may use the following alternative tires. Note: This rule is intended to allow older cars with the described suspension design to use the alternative tires. It is not to be exploited by modifying cars with push-rods or pull-rods to meet the above requirements or by modifying either end of older cars to push- or pull-rod suspension to be eligible to run the alternative tires. Cars that were homologated in 1989 or earlier with push- or pull-rod suspension on no more than two corners may seek approval to run the alternative tire by utilizing the compliance process outlined in GCR section 8.1.4."