This track has been raced on 4 configurations (The Circuit, 2.57 mi; 19, 2.92 mi; 1.83 mi; 3.02 mi). Laps on different configurations are not comparable, so only events on the 2.57 mile layout are shown; switch above to see the others.
One session is left out because the timing does not look like full laps: Cal Club 2023 Qualifying #2.
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 0.65 mi
S2 IM1 → IM2 0.75 mi
S3 IM2 → SF 1.17 mi
Spd In → Out 0.03 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
Stohr WF1
P2
1
1:37.278Tim Day Jr
1:37.278Tim Day Jr
1:39.758Tim Day Jr
155.4Tim Day Jr
26.848Tim Day Jr
28.010Tim Day Jr
42.420Tim Day Jr
Swift Db6
FF
2
1:49.259Edward Erlandson
1:55.247Johnnie Crean
1:54.993Johnnie Crean
124.5Johnnie Crean
31.358Johnnie Crean
32.841Johnnie Crean
47.766Edward Erlandson
SWIFT DB-6 Honda
FF
1
1:49.259Edward Erlandson
47.766Edward Erlandson
Swift Db6
FF
1
1:54.993Johnnie Crean
1:55.247Johnnie Crean
1:54.993Johnnie Crean
124.5Johnnie Crean
31.358Johnnie Crean
32.841Johnnie Crean
50.291Johnnie Crean
Piper DL7-Honda
FF/STL
2
1:51.118Eric Poulsen
1:52.044Eric Poulsen
1:51.118Eric Poulsen
114.7Eric Poulsen
30.276Eric Poulsen
31.650Eric Poulsen
48.818Eric Poulsen
Piper DL7-Honda
FF
1
1:51.118Eric Poulsen
1:52.044Eric Poulsen
1:51.118Eric Poulsen
114.7Eric Poulsen
30.276Eric Poulsen
31.650Eric Poulsen
48.818Eric Poulsen
Honda Prelude
STL
1
1:56.961Carl Young
1:57.917Carl Young
1:56.961Carl Young
104.5Carl Young
31.994Carl Young
33.745Carl Young
50.892Carl Young
Mazda Miata
STL
17
1:51.665Jared Korth
1:54.963Nick Leverone
1:54.845Gavin Wardle
136.6Bryce Johnson
8.264Gavin Wardle
32.218Jared Korth
48.811Jared Korth
Mazda MX-5
STL
6
1:51.665Jared Korth
1:57.404Ryan Gutile
1:54.845Gavin Wardle
136.6Bryce Johnson
8.264Gavin Wardle
32.218Jared Korth
48.811Jared Korth
Mazda Miata
STL
10
1:52.983Wesley Mollno
1:54.963Nick Leverone
1:55.682Nick Leverone
133.4Wesley Mollno
30.815Jon Davies
32.820Jon Davies
49.197Wesley Mollno
Mazda MX-5 (2015)
STL
1
2:00.239Adrian Comstock
2:00.239Adrian Comstock
2:00.722Adrian Comstock
133.0Adrian Comstock
32.847Adrian Comstock
34.493Adrian Comstock
52.675Adrian Comstock
SWIFT DB-
FF
1
1:53.098Edward Erlandson
1:53.098Edward Erlandson
1:54.741Edward Erlandson
133.7Edward Erlandson
30.951Edward Erlandson
32.299Edward Erlandson
49.791Edward Erlandson
Mazda RX-8
STL
1
1:53.515David LeCren
2:09.464David LeCren
2:11.372David LeCren
121.0David LeCren
31.217David LeCren
32.486David LeCren
49.550David LeCren
Honda Civic Si
STL
1
1:56.438Jonathan Lugod
1:57.331Jonathan Lugod
1:56.438Jonathan Lugod
106.8Jonathan Lugod
31.787Jonathan Lugod
33.468Jonathan Lugod
50.873Jonathan Lugod
Acura integra
STL
1
2:24.310Jack McEachern
2:24.310Jack McEachern
2:24.550Jack McEachern
77.6Jack McEachern
38.960Jack McEachern
41.141Jack McEachern
1:02.410Jack McEachern
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
Cal Club 2023 → Cal Club 2024 2023-02-24 to 2024-02-23
FF Add Fast Forward Part Numbers for Honda Fit Engine
wordingFF Honda Fit engine adds Fast Forward part number alternatives for intake, exhaust, oil system, and scavenge pump components.
As printed in Fastrack
In FC/FF, GCR section 9.1.1.B.14.a.6, change as follows: "For all Honda part numbers in these specifications, superc seding part numbers are considered equivalent. In FC/FF, GCR section 9.1.1.B.14.f.5, change as follows: "Cylinder head breather restrictor must be used as supplied by HPD or Fast Forward, unmodified.: HPD PN: 15262-F21S-A200; Fast Forward PN: FF200-503." In FC/FF, GCR section 9.1.1.B.14.k.2, change as follows: "The upper manifold, air box and throttle body assembly must be used as delivered from Honda, HPD, or Fast Forward as noted below."
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In FC/FF, GCR section 9.1.1.B.14.k.2, insert as follows: "a. Intake manifold: HPD PN: 17210-F21S-A210; Fast Forward PN: FF200-201. b. Throttle body: Honda Fit: PN: 16400ZZ5024; HPD PN: 16400ZZ5024; Fast Forward PN: FF200-104. c. Throttle lever: HPD PN: 17330-F21S-A210; Fast Forward PN: FF200-101." In FC/FF, GCR section 9.1.1.B.14.k.3, change as follows: "All gaskets and sensors utilized on the inlet manifold from head to throttle body must be Honda Fit OEM, or HPD supplied or Fast Forward as noted below. a. Gasket In. manifold: HPD PN: 17105-RB0-004, Honda Fit OEM. b. Gasket, EGR chamber cover: HPD PN: 17146-RB0-004, Honda Fit OEM. c. Gasket In. port: HPD PN: 17115-RB0-007, Honda Fit OEM. d. Gasket, restrictor: HPD PN: 17399-F21S-A200, (2 required) HPD; Fast Forward PN: FF200-109. Two required." In FC/FF, GCR section 9.1.1.B.14.k.5, change as follows: "The Honda Fit engine is required to have an HPD supplied air inlet restrictor supplied by HPD or Fast Forward: HPD PN: 17344- F21S-A201; Fast Forward PN: FF200-110, with internal diameter of 30.5mm and thickness of 3.175mm (0.125 inches) correctly installed within the intake system." In FC/FF, GCR section 9.1.1.B.14.m.1, change as follows: "The exhaust manifold must be as supplied by HPD or Fast Forward:, HPD part # PN: 18150-F21S-A200 or # PN: 1818 50-F21S-B200; Fast Forward PN: FF500-001 or PN: FF500-002." In FC/FF, GCR section 9.1.1.B.14.n.1, change as follows: "The oil pan, baffle plate, and scavenge pump filter fittings must be as supplied by HP or Fast Forward as noted below. No modifications are permitted. a. Oil pan: HPD PN: 11200-F21S-A210 or PN: 11200-F21S-C240; Fast Forward PN: FF100-201A or PN: FF100-201B. b. Oil pan baffle plate: HPD PN: 11221-F21S-A210; Fast Forward PN: FF100-202. c. Oil scavenge pump filter fittings (2 required): HPD PN: 15180-F21S-A210; Fast Forward PN: FF100-204." In FC/FF, GCR section 9.1.1.B.14.n.3, change as follows: "The scavenge pump and internal scavenge pump parts must be as supplied from HPD or Fast Forward as noted below." In FC/FF, GCR section 9.1.1.B.14.n.3, change as follows: "b. Rotor outside diameter: HPD 44.400mm (1.748 inches):; Fast Forward 40.640mm (1.600 inches). c. Scavenge pump rotor set: HPD PN: 15450-F21S-A20; Fast Forward PN: FF100-110. d. Oil pump: HPD PN: 15100-F21S-A200; Fast Forward PN: FF100-100A. e. Scavenge pump cartridge: 15111-F21S-A21; Fast Forward PN: FF100-127. f. Scavenge pump port A: HPD PN: 15137-F21S-A20; Fast Forward PN: FF100-101. g. Scavenge pump port B: HPD PN: 15139-F21S-A20; Fast Forward PN: FF100-102. h. Scavenge pump shaft: HPD PN: 15510-F21S-A20; Fast Forward PN: FF100-103. i. Scavenge pump front cover: HPD PN: 15070-F21S-A21; Fast Forward PN: FF100-104."
P2 Remove redundant effective date language and update engine table
slowerP2 motorcycle engines: 2011+ Kawasaki restrictor reduced to 34mm, minimum weight raised to 1100 lbs; 2009+ other brands weight raised to 1100 lbs.
As printed in Fastrack
In P2, GCR section 9.1.8.C.D.2, change as follows: "Height: No part of the vehicle having special or significant aerodynamic function shall exceed a height of 115cm (45.275 inches) above the ground with the car in normal racing trim, driver aboard." In P2, GCR section 9.1.8.C.D.3, change as follows: "However, no portion shall extend more than 10cm (3.937 inches) beyond a plane tangent to the outer face of the front and rear wheels with tires." P2 Engine Table Spec
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Line Engine Series
A specification table follows in the original; it is not shown here.
wordingP2 side body height requirement clarified: outermost surface between wheel openings must equal front axle centerline height.
As printed in Fastrack
In P2, GCR section 9.1.8.C.D.6, change as follows: "As viewed from the side, T the outermost surface of side pods body between the front and rear wheel openings and above the floor must have a minimum height equal to the height of the front axle centerline."
P2 Clarify closed cockpit single seat car allowance
wordingP2 closed cockpit single seat cars now prohibited unless specifically allowed in Table 1.
As printed in Fastrack
In P2, GCR section 9.1.8.C.C, add a section as follows: "4. Closed cockpit single seat cars are not permitted unless specifically allowed by a spec line in Table 1."
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."
P2 Correct Table 1 for Engine Date Range Specifications
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."
P2 E&O - Clarify B.1 modified engine range in AMAC spec lines
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."
P2 Replacement Engine Crankcase for 07/08 Suzuki GSX-R1000 Engines
unclearP2 Suzuki GSX-R1000 07/08 engine crankcase may swap to GSX-S1000 16/19 part #11301-04840.
As printed in Fastrack
In P2 Engine Table, Spec Line B.1, add to notes as follows: "No modifications allowed on engines manufactured after 2008 model year. 2007-2008 Suzuki GSX-R1000 crankcase part #11300-21860 may be replaced with 2016-2019 Suzuki GSX-S1000 crankcase part #11301-04840."
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"
In P2 Engine Table, Spec Line E, change the notes as follows: "No engine modifications except for dry sump oil system, ECU mapping, and exhaust system the following: oil system, ECU, and exhaust are unrestricted."
wordingP2 FIA Group CN spec notes clarified: Series changed to Challenge, documentation requirement moved to online link.
As printed in Fastrack
In P2 Table 1, FIA Group CN spec line, change the notes as follows: "FIA Group CN homologated chassis, brake calipers and discs, hub carriers, and suspension components are required. V de V European Proto Endurance Series Challenge permitted bodywork, rear diffuser, wing, wheels, and assisted shifting are allowed. Car M must comply with all other P2 requirements. Competitors must have copies of FIA Group CN Technical Regulations and V de V European Proto Endurance Series Challenge Sporting and Technical Regulations in their possession and present them upon request are available here: https://www.scca.com/pages/technical-forms-and-downloads."
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."
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."
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 Miata on this page: Jared Korth, Ricardo Arruda, Gavin Wardle, Ryan Gutile, Bryce Johnson, Andy Chittum, 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."