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BoP Lab / Buttonwillow Raceway Park

FV + SRF3 + FC at Buttonwillow Raceway Park

No mapCal Club 2024

Track map: sectors and speed trap

Track map with timing sectors and speed trap
Shown for: Cal Club 2026 (practice, qualifying, race) · Cal Club 2025 (practice, qualifying, race)
Class · click a class to switch, + to compare alongside
Track configuration
Events

This track has been raced on 2 configurations (The Circuit, 2.57 mi; 2.92 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 run is left out as not that car's own laps (far quicker than the car managed in any other session and than anyone else in its class all week; usually a swapped transponder): Tom Burt in Cal Club 2025 PM (1:42.300; the car's best in any other session was 1:52.334 and the rest of the class's best all week 1:50.233).

PosCarDriverClass#LapTheoreticalQualRace5-lap stintConsistencyTrapS1S2S3
1GlamdringMark EdwardsFV741:44.706 B-P1:44.5922:05.638 A-Q12:04.892 A-R22:06.364 A-R2+2.303 A-R2128.9 B-P28.863 B-P30.228 B-P45.501 B-P
2Van Diemen DP-08Robert ArmingtonFC111:45.137 A-Q21:44.9431:45.137 A-Q21:45.314 A-R21:46.641 A-R2+1.552 A-R2143.5 A-Q229.106 A-Q230.109 A-R145.728 A-Q2
3Van Diemen RF96Shawn SarbackerFC31:47.570 A-R21:47.2051:47.741 A-Q21:47.570 A-R21:48.139 A-R2+2.423 A-R2146.2 A-Q229.351 A-Q230.778 A-R247.076 A-R2
4Van Diemen RF97Bill WallschlaegerFC01:47.993 A-R21:47.7661:51.040 A-Q11:47.993 A-R21:48.553 A-R2+1.107 A-R2147.5 A-R229.638 A-R230.895 A-R247.233 A-R2
5Van Diemen RF01Paul MacFarlaneFC531:48.522 B-R11:48.4811:50.067 B-Q11:48.522 B-R11:49.143 B-R1+2.405 B-R1114.4 B-R229.050 B-R131.137 B-R148.294 B-R1
6SCCA Ent SRF3Caleb ShraderSRF3991:50.233 B-Q21:49.9671:50.233 B-Q21:50.825 B-R21:51.100 B-R2+0.469 B-R2133.6 A-Q230.136 B-P31.672 B-P48.159 B-P
7SCCA Ent SRF3Calvin HarrisSRF3421:50.359 B-Q21:50.3391:50.359 B-Q21:51.127 B-R21:51.474 B-R2+0.477 B-R2112.4 B-Q230.212 B-Q231.791 B-Q248.336 B-Q2
8SCCA Ent SRF3John BlackSRF3171:50.578 B-Q21:50.2651:50.578 B-Q21:50.980 B-R11:51.262 B-R1+0.649 B-R1134.8 A-P30.260 B-Q231.841 B-Q148.164 B-Q1
9SCCA Ent SRF3Todd HarrisSRF3241:50.578 B-Q21:50.5781:50.578 B-Q21:51.673 B-R11:51.973 B-R2+0.681 B-R2110.6 B-R130.259 B-Q231.845 B-Q248.474 B-Q2
10SCCA Ent SRF3Taylor HarrisSRF3121:50.673 B-Q21:50.5891:50.673 B-Q21:51.241 B-R21:51.430 B-R2+0.243 B-R2114.1 B-R130.347 B-Q231.916 B-Q248.326 B-Q2
11SCCA Ent SRF3Mike MiserendinoSRF3111:50.810 B-Q21:50.2821:50.810 B-Q21:51.796 B-R21:52.073 B-R2+0.352 B-R2135.7 A-Q230.282 B-Q232.022 B-R147.978 A-P
12SCCA Ent SRF3Steve FoggSRF3211:50.892 B-Q21:50.7701:50.892 B-Q21:51.698 B-R11:51.962 B-R2+0.636 B-R2129.9 A-R1, A-Q230.379 B-Q232.043 B-Q248.348 B-Q2
13SCCA Ent SRF3Asad NikadambaevSRF31441:50.913 A-Q21:50.9131:50.913 A-Q21:52.070 A-R21:52.270 A-R2+0.491 A-R2136.8 A-Q130.477 A-Q231.965 A-Q248.471 A-Q2
14SCCA Ent SRF3TJ AckerSRF3621:51.005 B-Q21:50.8441:51.005 B-Q21:51.755 B-R21:52.016 B-R1+0.510 B-R1110.3 B-Q130.314 B-Q232.118 B-Q248.412 B-Q2
15SCCA Ent SRF3Robert EdmisonSRF3221:51.118 B-P1:50.5651:51.136 B-Q21:51.601 B-R21:52.033 B-R2+1.171 B-R2136.5 A-P30.175 B-Q131.846 B-Q148.544 B-Q1
16SCCA Ent SRF3EJ AbedSRF3271:51.304 B-Q21:51.2141:51.304 B-Q21:52.103 B-R21:52.228 B-R2+0.387 B-R2136.8 A-Q130.360 B-Q232.113 B-Q248.741 B-Q2
17SCCA Ent SRF3Sean O'BoyleSRF3671:51.453 B-P1:51.2481:51.799 B-Q21:52.231 B-R21:52.285 B-R2+0.523 B-R2135.9 A-R230.363 B-P32.200 B-P48.685 B-P
18SCCA Ent SRF3Jon McClintockSRF3231:51.704 B-Q21:51.6531:51.704 B-Q21:52.510 B-R21:52.779 B-R2+0.754 B-R2134.4 A-R130.416 B-Q232.353 B-P48.884 B-Q2
19Caracal C1Marjorie LundbergFV24, 701:51.773 B-P1:51.7732:04.579 A-Q22:02.255 B-R12:02.701 B-R1+0.787 B-R1122.3 A-Q230.462 B-P32.246 B-P49.106 B-P
20SCCA Ent SRF3Andre PerraSRF3771:51.816 B-P1:51.8161:52.314 B-Q2111.0 B-Q230.534 B-P32.284 B-P48.998 B-P
21SCCA Ent SRF3Eric HandSRF3761:51.935 B-P1:51.7181:52.618 B-Q11:52.736 B-R21:53.362 B-R2+1.041 B-R2132.2 A-Q230.479 B-Q232.325 B-P48.914 B-P
22SCCA Ent SRF3Paul MarinoSRF3141:52.092 B-P1:51.8821:52.338 B-Q11:52.816 B-R11:53.859 B-R2+0.588 B-R2138.9 A-Q230.539 B-Q132.391 B-P48.952 B-Q1
23SCCA Ent SRF3Michael NeumeyerSRF391:52.163 A-Q21:52.0581:52.163 A-Q21:53.546 A-R11:53.921 A-R2+0.745 A-R2133.4 A-Q1, A-Q230.713 A-Q232.218 A-Q249.127 A-Q1
24SCCA Ent SRF3Graham WooddSRF3521:52.194 B-Q21:51.9591:52.194 B-Q21:52.959 B-R21:53.231 B-R2+0.687 B-R2112.4 B-Q130.631 B-Q232.483 B-Q148.845 B-Q2
25SCCA Ent SRF3Mark BallengeeSRF31971:52.334 B-Q21:51.9551:52.334 B-Q21:52.715 B-R11:53.509 B-R1+1.364 B-R1137.8 A-Q130.821 B-R132.309 B-R148.825 B-Q2
26SCCA Ent SRF3Tom BurtSRF3451:52.334 B-Q2sector data unreliable1:52.334 B-Q21:52.708 B-R11:53.274 B-R2+0.810 B-R2136.6 A-Q130.69432.31844.841
27SCCA Ent SRF3Umberto MillettiSRF3341:52.385 B-Q11:51.7771:52.385 B-Q11:52.925 B-R11:53.355 B-R2+0.505 B-R2136.1 A-R230.406 B-Q132.405 A-Q248.966 B-R1
28SCCA Ent SRF3Lee DouglasSRF321:52.386 B-P1:51.9761:52.580 B-Q11:53.371 B-R11:54.213 B-R1+1.557 B-R1115.4 B-P30.589 B-P32.398 B-Q148.989 B-Q1
29SCCA Ent SRF3Rob PielstickerSRF3331:52.435 A-Q21:52.3941:52.435 A-Q21:53.632 A-R21:53.816 A-R1+0.453 A-R1136.8 A-P30.944 A-Q232.477 A-Q248.973 A-Q2
30SCCA Ent SRF3Paul GoudySRF31271:52.763 B-P1:52.2111:53.151 B-Q21:53.038 B-R21:53.595 B-R2+0.957 B-R2138.5 A-Q130.530 B-P32.469 B-R249.212 B-P
31SCCA Ent SRF3Maguire DickerhoofSRF3431:52.777 A-Q21:52.7771:52.777 A-Q21:53.722 A-R21:54.380 A-R2+1.053 A-R2137.6 A-Q231.056 A-Q232.628 A-Q249.093 A-Q2
32SCCA Ent SRF3Chris StrandSRF3491:52.795 B-P1:52.4751:55.168 B-Q11:56.794 B-R21:58.272 B-R2+2.172 B-R2111.6 B-P30.631 B-P32.583 B-P49.261 B-P
33SCCA Ent SRF3Tom MiserendinoSRF3151:52.801 B-P1:52.3021:53.154 B-Q21:53.280 B-R11:53.865 B-R2+0.398 B-R2130.1 A-Q130.778 B-Q232.383 B-P49.141 B-Q1
34SCCA Ent SRF3Vince BalchSRF3651:53.036 B-Q21:53.0361:53.036 B-Q21:54.674 B-R11:55.749 B-R1+1.552 B-R1133.4 A-Q230.700 B-Q232.651 B-Q249.685 B-Q2
35SCCA Ent SRF3Jay RosenthalSRF3551:53.237 B-Q11:52.9181:53.237 B-Q11:53.706 B-R11:54.392 B-R2+0.535 B-R2136.6 A-Q131.035 B-Q132.580 B-Q149.303 B-Q2
36SCCA Ent SRF3Clayton PowersSRF3701:53.237 B-P1:52.9901:53.631 A-Q21:54.845 A-R11:55.266 A-R1+0.979 A-R1134.1 A-Q230.988 B-P32.714 A-Q249.288 B-P
37SCCA Ent SRF3John ArscottSRF3811:53.623 B-Q21:53.2881:53.623 B-Q21:54.918 B-R21:55.509 B-R2+0.858 B-R2108.7 B-Q130.895 B-Q132.634 B-Q249.759 B-Q2
38SCCA Ent SRF3Michael MoshaySRF3161:54.242 B-R21:53.9821:54.826 B-Q21:54.242 B-R21:54.930 B-R2+1.338 B-R2129.8 A-Q231.118 B-R233.024 B-R249.840 B-R2
39SCCA Ent SRF3Denny FosdickSRF3691:54.932 B-P1:54.8301:55.479 B-Q11:56.082 A-R21:57.089 A-R1+1.298 A-R1128.4 A-P31.449 B-P33.388 A-Q149.993 B-P
40SCCA Ent SRF3Doug StewartSRF3711:55.021 B-P1:54.7321:55.878 B-Q11:55.200 B-R21:55.941 B-R2+1.304 B-R2130.4 A-Q131.406 B-P33.145 B-R250.181 B-P
41SCCA Ent SRF3Don PallaSRF337, 301:56.524 B-Q21:55.9111:56.524 B-Q21:57.682 A-R21:58.063 A-R2+0.973 A-R2125.7 A-R231.402 B-Q233.317 B-Q251.192 B-R1
42SCCA Ent SRF3David RothSRF371:56.755 A-R21:56.6071:57.730 A-Q21:56.755 A-R21:57.810 A-R2+2.186 A-R2132.7 A-P32.055 A-Q233.685 A-R250.867 A-R2
43SCCA Ent SRF3Alice KutsyySRF31111:57.255 B-P1:57.2361:59.043 B-Q11:59.139 B-R12:01.752 B-R1+6.376 B-R1104.7 B-R132.212 B-P33.871 B-P51.153 B-P
44SCCA Ent SRF3Gary KnesevitchSRF3631:57.788 B-R21:57.0251:58.429 B-Q21:57.788 B-R21:58.928 B-R2+2.951 B-R2103.5 B-R132.046 B-R234.221 B-R150.758 B-R2
45Van Diemen RF (2000)Greg PizzoFC141:58.213 A-R21:57.3332:10.106 A-Q21:58.213 A-R22:01.052 A-R2+4.196 A-R2127.3 A-R232.045 A-R234.162 A-R251.126 A-R2
46DART IIMace GjermanFV891:58.898 A-R21:56.7992:04.535 A-Q11:58.898 A-R22:07.262 A-R2+8.538 A-R2121.9 A-Q126.541 A-R235.132 A-Q155.126 A-Q2
47Protoform P4Gavin Sweeney >115%FV1072:01.197 B-R12:00.9012:02.354 B-Q22:01.197 B-R12:02.073 B-R2+0.598 B-R2124.6 A-Q132.871 B-P34.423 B-R153.607 B-R1
48LYNXXDonald Manthe >115%FV402:02.715 B-P2:02.3112:06.541 A-Q12:05.686 A-R22:08.709 A-R2+3.944 A-R2117.9 A-Q132.587 B-P35.402 A-R254.322 B-P
49CrusaderBlake Tatum >115%FV32:04.723 A-R12:04.7232:05.855 A-Q22:04.723 A-R12:06.212 A-R2+1.581 A-R2122.5 A-Q134.149 A-R135.231 A-R155.343 A-R1
50Mysterian M2Ronnie Chuck >115%FV50, 512:06.510 B-R22:05.0892:08.877 B-Q22:06.510 B-R22:07.002 B-R2+1.249 B-R2115.9 A-R233.255 B-R235.637 B-R256.197 B-R2

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

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

CarClassDriversLapQualRaceTrapS1S2S3
GlamdringFV11:44.706Mark Edwards2:05.638Mark Edwards2:04.892Mark Edwards128.9Mark Edwards28.863Mark Edwards30.228Mark Edwards45.501Mark Edwards
Van Diemen RF01FC21:45.137Robert Armington1:45.137Robert Armington1:45.314Robert Armington143.5Robert Armington29.050Paul MacFarlane30.109Robert Armington45.728Robert Armington
Van Diemen RF96FC11:47.570Shawn Sarbacker1:47.741Shawn Sarbacker1:47.570Shawn Sarbacker146.2Shawn Sarbacker29.351Shawn Sarbacker30.778Shawn Sarbacker47.076Shawn Sarbacker
Van Diemen RF97FC11:47.993Bill Wallschlaeger1:51.040Bill Wallschlaeger1:47.993Bill Wallschlaeger147.5Bill Wallschlaeger29.638Bill Wallschlaeger30.895Bill Wallschlaeger47.233Bill Wallschlaeger
SCCA Ent SRF3SRF3381:50.233Caleb Shrader1:50.233Caleb Shrader1:50.825Caleb Shrader138.9Paul Marino30.136Caleb Shrader31.672Caleb Shrader44.841Tom Burt
Caracal C1FV11:51.773Marjorie Lundberg2:04.579Marjorie Lundberg2:02.255Marjorie Lundberg122.3Marjorie Lundberg30.462Marjorie Lundberg32.246Marjorie Lundberg49.106Marjorie Lundberg
Van Diemen RFFC11:58.213Greg Pizzo2:10.106Greg Pizzo1:58.213Greg Pizzo127.3Greg Pizzo32.045Greg Pizzo34.162Greg Pizzo51.126Greg Pizzo
DART IIFV11:58.898Mace Gjerman2:04.535Mace Gjerman1:58.898Mace Gjerman121.9Mace Gjerman26.541Mace Gjerman35.132Mace Gjerman55.126Mace Gjerman
Protoform P4FV12:01.197Gavin Sweeney2:02.354Gavin Sweeney2:01.197Gavin Sweeney124.6Gavin Sweeney32.871Gavin Sweeney34.423Gavin Sweeney53.607Gavin Sweeney
LYNXXFV12:02.715Donald Manthe2:06.541Donald Manthe2:05.686Donald Manthe117.9Donald Manthe32.587Donald Manthe35.402Donald Manthe54.322Donald Manthe
CrusaderFV12:04.723Blake Tatum2:05.855Blake Tatum2:04.723Blake Tatum122.5Blake Tatum34.149Blake Tatum35.231Blake Tatum55.343Blake Tatum
Mysterian M2FV12:06.510Ronnie Chuck2:08.877Ronnie Chuck2:06.510Ronnie Chuck115.9Ronnie Chuck33.255Ronnie Chuck35.637Ronnie Chuck56.197Ronnie Chuck

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 2024 → Cal Club 2025 2024-02-23 to 2025-02-22

FC Four Pot Calipers

#35481 from Steve Jenks · Rule change · TB 24-04 (2024-04 Fastrack)

neutralFC adds F2000 Metrik ZF2 with Ford Zetec engine and four-piston Brembo calipers as spec-line car.

In FC Table FC Charts, add the following:
In FC, GCR section 9.1.1.B.1.c, change as follows:
"The USF2000 tube frame Van Diemen car powered by the Mazda MZR LF-DE 2 liter engine and the F2000 Metrik ZF2 car
equipped with 4-piston calipers is are added as a "spec line" cars in Formula Continental. Additional "spec line" cars are
disfavored, and Balance of Performance (BoP) adjustments to keep "spec line" cars competitive with cars that meet the class
formula are likewise disfavored."
FC Charts
Car Engine Wheel Width

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(in) ± .060 Aero Transmission Weight Notes

A specification table follows in the original; it is not shown here.

SRF3 SRF3 Alternator Pulley Update In

#36095 from Robey Clark · Rule change · TB 24-06 (2024-06 Fastrack)

fasterSRF3 alternator pulley minimum weight reduced from 12 oz to 11 oz.

SFR3, GCR section 9.1.8.D.2.H.17, change as follows:
"Alternator Pulley: P/N G902130, or P/N G902130A, or P/N G902131 (six row). 12 11 oz minimum weight."

SRF3 Update Rain Tire Rule and Hoosier Decal Placement

#36436 from Robey Clark · Rule change · TB 24-08 (2024-08 Fastrack)

slowerSRF wet tires: P185/60R13 H20/W2 option removed; P185/65R13 W2 front now required with P205/60R13 W2 rear.

In SRF, GCR section 9.1.8.D.1.X.f, change as follows:
"Wet:
Front – Hoosier P/N 46100 P185/60R13 H20 or W2
Rear – Hoosier P/N 46105 P205/60R13 H20 or W2
Ground clearance is 2.5” with driver as raced when P185/60R13 (H20 or W2) tires are used.
OR
Front – Hoosier P/N 46101 P185/65R13 W2
Rear – Hoosier P/N 46105 P205/60R13 W2

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1. It is forbidden to regroove tires.
2. The use of tire warmers or cooling methods other than natural air convection or conduction is prohibited. The penalty for
violation will be the loss of qualifying times and/or the disqualification of race results.
3. Hoosier SRF/SRF3 Decal Placement:
Four (4) "Hoosier" decals are required in the following locations: Two (2) 11" X 3" decals on the vertical plane of the front nose to
the outside of the cooling opening on each side and two (2) 18" X 5" decals, one on each side of the engine cover or above the
rear wheel openings on the vertical plane. Hoosier decals are available, free of charge, from all Hoosier tire distributors including
SCCA Enterprises."

SRF3 Update to Letter 36619 with new Hoosier Contingency Decal Info

#36624 from Robey Clark · Rule change · TB 24-09 (2024-09 Fastrack)

neutralSRF Hoosier decal requirement reduced from four decals in specific locations to three decals with simpler placement rules.

In SRF, GCR section 9.1.8.D.1.X.f.3, change as follows:
"Four (4) "Hoosier" decals are required in the following locations: Two (2) 11" X 3" decals on the vertical plane of the front nose
to the outside of the cooling opening on each side and two (2) 18" X 5" decals, one on each side of the engine cover or above the
rear wheel openings on the vertical plane. Hoosier decals are available, free of charge, from all Hoosier tire distributors including
SCCA Enterprises Per Hoosier's contingency program, three (3) decals are required to qualify for contingency awards. One (1)
decal must be located on each side of the car and one (1) decal must be visible on the front."

SRF3 Update SRF3 Air Filter Rule

#36681 from Robey Clark · Rule change · TB 24-10 (2024-10 Fastrack)

unclearSRF3 air filter rule removes K&N RC-9160 option, leaving only P/N WM301020 allowed.

In SRF, GCR section 9.1.8.D.2.H.23, change as follows:
"Air Filter: P/N WM301020 or K&N RC-9160"

SRF3 Update SRF Brake Rotor Thickness

#36687 from Robey Clark · Rule change · TB 24-10 (2024-10 Fastrack)

slowerSRF brake rotor minimum thickness increases from 12.20mm to 13.25mm, Wilwood vented rotor P/N 800065.

In SRF, GCR section 9.1.8.D.1.X.g, change as follows:
"Brakes: Hawk Blue 9012 pads P/N 801993 must be used. Wilwood vented rotor P/N 800065 shall must be used as delivered with
no machining of any kind. Minimum thickness 12.20mm (0.481”) 13.25mm (0.522”)."

SRF3 Hoosier Tire Decal Placement

#36739 from Robey Clark · Rule change · TB 24-10 (2024-10 Fastrack)

neutralSRF3 Hoosier logo placement changes from four decals to three decals in different locations.

In SRF, GCR section 9.1.8.D.2.B, change as follows:
"Mandatory identification: "SRF3" near the side car numbers. "Hoosier" logo (4) on both sides front lower outer corners of the
nose and each side of the tail. Three (3) "Hoosier" logos, one (1) on each side of the car and one (1) on the center front of the car."

FV Disc Brakes

#36822 from Guy Bellingham · Rule change · TB 24-10 (2024-10 Fastrack)

neutralFV ferrous rotor no longer required to be smooth; may have up to three pad cleaning grooves per side.

In FV, GCR section 9.1.1.C.4.D, change as follows:
"Any ferrous alloy, unvented rotor may be used, but must have a maximum diameter of 11.75 in. and a minimum thickness of
0.20 in. The otherwise smooth rotor may not be cross-drilled and may have a maximum of three pad cleaning grooves per side."

FC 9.1.1.10.h. FC Tire Rule

#36533 from SCCA Staff · Rule change · TB 24-09 (2024-09 Fastrack)

slowerFC tire limit reduced to four dry and four wet for Regional/Major/Super Tour, eight for Runoffs.

In FC, GCR section 9.1.1.B.10.h, change as follows:
"(Effective 11/1/2024) FC is permitted a maximum of four (4) dry tires and four (4) wet tires for all Regional, Major, and Super
Tour events; eight (8) dry tires and eight (8) wet tires are permitted for the Runoffs. This is effective beginning with the first (1st)
qualifying session of the event. Marked tires are not required for The tire limit does not apply to testing or practice. It is the
competitor's responsibility to ensure that the tires are declared, marked, and logged by Tech immediately upon conclusion of the
first qualifying session, as provided in the event supplemental regulations, or per the instructions of the Race Director or Chief
Steward. in advance of the tire(s) being used in a qualifying session or race. Failure to participate on marked Use of tires in
excess of the number allowed will result in a penalty. Failure to participate on declared/marked/logged tires after the time

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prescribed for the same may result in a penalty. If a tire is damaged during a qualifying session or a race, the competitor may
replace the damaged tire with a used tire upon approval by the Race Director or Chief Steward without loss of time or finishing
position. Second or subsequent damaged tires may similarly be replaced upon approval by the Race Director or Chief Steward,
but such will result in the loss of grid position in the subsequent race or session; the competitor will start at the back of the grid.
Replacement of a damaged tire with a new tire upon approval by the Race Director or Chief Steward will result in loss of grid
position in the subsequent race or session; the competitor will start at the back of the grid."

FC Change FF/FC Weight with Sequential Gearbox

#36651 from Robert Wright · Rule change · TB 24-11 (2024-11 Fastrack)

fasterFF and FC cars with sequential gearbox must add 10 lbs. to minimum weight, down from 25 lbs.

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."

Cal Club 2025 → Cal Club 2026 2025-02-22 to 2026-02-21

SRF3 Driver Safety & Comfort

#37966 from Robey Clark · Rule change · TB 25-04 (2025-04 Fastrack)

neutralSRF drivers with disabilities may modify seat and controls for safety and comfort with approval and logbook notation.

In SRF, GCR section 9.1.8.D.1.D, add the following:
"f. Driver Safety and Comfort modifications to seat and controls for drivers with disabilities may be made only by approval. These
modifications must be reported to SCCA Enterprises and noted in the car logbook. The modifications are approved only for the
noted driver with disabilities. If the car is used by or sold to another driver, it must be returned to the previous standard
configuration."

SRF3 Update SADEV transmission specs

#37992 from Club Racing Board · Rule change · TB 25-04 (2025-04 Fastrack)

neutralSRF SADEV-SRF3 6-speed sequential transmission gear ratios wording clarified, effective 2025-04-01.

In SRF, GCR section 9.1.8.D.2.K, change as follows:
"OR
SADEV-SRF3 6-Speed Sequential (beginning from Oct. 4, 2021 onward):
1st 12-36 3.0000 : 1
2nd 15-31 2.0667 : 1
3rd 18-28 1.5556 : 1
4th 22-28 1.2727 : 1
5th 24-26 1.0833 : 1

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6th 25-23 0.9200 : 1
Final Drive Ratio: 15-48 3.20"

SRF3 SRF Rule Updates

#38853 from Robey Clark · Rule change · TB 25-09 (2025-09 Fastrack)

neutralSRF3 brakes restructured: Hawk Blue 801993 pads, Wilwood 800065 rotors only; adds Girling 880358, Wilwood 880357, Tilton 880360 master cylinders.

Effective 9/1/25 in SRF, GCR section 9.1.8.D.1.V.ff, add the following:
"SRF3 Oil Cooler, P/N G480503 may be used as mounted per the GEN3 Assembly Manual. No fan permitted for SRF. HD Oil
Cooler kit P/N G1148500 may be used as mounted per the GEN3 Conversion Manual."
Effective 9/1/25 in SRF, GCR section 9.1.8.D.X.g, change as follows:
"Brakes: Hawk Blue 9012 pads P/N 801993 must be used. Wilwood vented rotor P/N 800065 must be used as delivered with no
machining of any kind. Minimum thickness 13.25mm (0.522”). The Renault Alliance solid front rotors may not be used. Rubber
caliper bushings may be replaced with bronze bushings P/N 1196185 or P/N 1196185. Original caliper pistons may be replaced
with vented caliper piston P/N 1196184; no other modification allowed. Wilwood caliper with bracket universal fit P/N 800038

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may be used as delivered with no modification of any kind. Wilwood knock back spring (2.63 lbs.) P/N 800045 may be used as
delivered with no modification of any kind; maximum of one spring per caliper.
1. Hawk Blue pads P/N 801993 only
2. Wilwood Vented Rotor P/N 800065 only, as delivered, with no machining of any kind. Minimum thickness 13.25mm (0.522")
3. Wilwood universal caliper Kit P/N 1180008 as delivered, caliper only P/N 800038; Wilwood knock back spring P/N 800045
may be used as delivered, with no machining of any kind, and only one spring per caliper
4. Renault caliper rubber bushings may be replaced with bronze bushings P/N 1196185 or P/N 1196185A
5. Renault caliper piston may be replaced with P/N 1196184 vented piston as delivered, with no machining of any kind
6. Girling .750" Master Cylinder P/N 880358 as delivered, with no machining of any kind
7. Wilwood .750" Master Cylinder P/N 880357 as delivered, with no machining of any kind
8. Tilton .750" Master Cylinder P/N 880360 as delivered, with no machining of any kind"

SRF3 Add HD Oil Cooler

#38979 from Robey Clark · Rule change · TB 25-10 (2025-10 Fastrack)

neutralSRF3 adds HD Oil Cooler P/N G1148500 as alternative to standard cooler P/N G480503.

In SRF, GCR section 9.1.8.D.1.V.ff, change as follows:
"SRF3 Oil Cooler, P/N G480503 or HD Oil Cooler P/N G1148500 may be used as mounted per the GEN3 Assembly Manual. No fan
permitted for SRF. HD Oil Cooler kit P/N G1148500 may be used as mounted per the GEN3 Conversion Manual."

FC F2000 MZR Spec Line Clarity/Revision Requested

#38927 from Rock Beauchamp · Rule change · TB 26-01 (2026-01 Fastrack)

neutralFC USF2000 Tube Frame may use Hewland LD200 4-speed H-pattern as alternative to Hewland JL-200 5-speed sequential.

In FC Charts table, USF2000 Tube Frame spec line, add the following to the Notes:
"Cars originally built with the Hewland LD200 4-speed H-pattern may use that transmission as an alternative to the Hewland JL-
200 5-speed sequential transmission."

FC Adjust F2000 Metrik ZF2 weight

#39612 from Club Racing Board · Rule change · TB 26-01 (2026-01 Fastrack)

fasterFC F2000 Metrik ZF2 minimum weight reduced to 1220 lbs.

In FC Charts table, F2000 Metrik ZF2 spec line, change the Weight as follows:
"1240 1220"

What the rules allowed changed as listed; this does not say what any particular car ran.