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BoP Lab / Buttonwillow Raceway Park

FV + SRF3 + FC + F6 at Buttonwillow Raceway Park

No mapCal Club 2024, Cal Club 2023

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 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.

F6 has no laps in the events chosen. It ran at Cal Club 2024: add that event.

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).

5 laps are left out as timing errors (far too short to be a lap of this track). The rest of those sessions, sectors included, is used.

PosCarDriverClass#LapTheoreticalQualRace5-lap stintConsistencyTrapS1S2S3
1Van Diemen RF05 (2005)Peter WestFC211:11.935 D-Q21:11.935 D-Q2
2Van Diemen RF99Troy ShooterFC871:12.478 D-Q21:12.478 D-Q2
3Van Diemen DP08 (2008)Gary PetersonFC91:14.576 D-Q21:14.576 D-Q2
4GlamdringMark 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
5Van Diemen DP-08Robert Armington >115%FC111:45.137 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
6Van Diemen RF96Shawn Sarbacker >115%FC31:47.570 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
7Van Diemen RF97Bill Wallschlaeger >115%FC01:47.993 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
8Van Diemen RF01Paul MacFarlane >115%FC531:48.522 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
9SCCA 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
10SCCA 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
11SCCA 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
12SCCA 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
13SCCA 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
14SCCA 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
15SCCA 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
16SCCA 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
17SCCA 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
18SCCA 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
19SCCA 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
20SCCA 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
21SCCA 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
22Caracal 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
23SCCA 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
24SCCA 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
25SCCA 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
26SCCA 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
27SCCA 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
28SCCA 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
29SCCA 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
30SCCA 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
31SCCA 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
32SCCA 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
33SCCA 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
34SCCA 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
35SCCA 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
36SCCA 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
37SCCA 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
38SCCA 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
39SCCA 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
40SCCA 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
41SCCA 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
42SCCA 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
43SCCA 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
44SCCA 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
45SCCA 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
46SCCA 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
47SCCA 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
48Van Diemen RF (2000)Greg Pizzo >115%FC141:58.213 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
49DART 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
50Protoform 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
51LYNXXDonald 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
52CrusaderBlake 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
53Mysterian 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
Van Diemen RF05FC11:11.935Peter West1:11.935Peter West
Van Diemen RF99FC11:12.478Troy Shooter1:12.478Troy Shooter
Van Diemen DP08FC11:14.576Gary Peterson1:14.576Gary Peterson
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 2023 → Cal Club 2024 2023-02-24 to 2024-02-23

SRF3 Update SRF Brake Rule

#33469 from Robey Clark · Rule change · TB 23-01 (2023-01 Fastrack)

Summary

slowerSRF Renault Alliance solid front rotors banned; restrictor reduced 35mm to 34mm for 2011+ Kawasaki; minimum weight increased to 1100 lbs for 2009+ stock engines.

As printed in Fastrack

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 shall be used as delivered with no
machining of any kind. Minimum thickness 12.20mm (0.481"). The 1985 Renault Alliance solid front rotor (Reference: Bendix
PRT1318 or Centrix 121.11004) may be used on front, rear, or both axles, but each axle must be paired to the same type
rotor. 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 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;

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maximum of one spring per caliper."
P2 Engine Table
Spec
Line Engine Series

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

SRF3 Update SRF Bodywork Fitment Rule

#33765 from Robey Clark · Rule change · TB 23-03 (2023-03 Fastrack)

Summary

wordingSRF3 tail sections allowed on SRFs with GEN3 airbox shimming up to 19 mm; alternate dash panel P/N 180100 or 180101 relocated in rules.

As printed in Fastrack

In Spec Racer Ford, GCR section 9.1.8.D.1.E, change as follows:
"j. Optional Bodywork Modification:
Viewing the tail section of the car from behind, draw a vertical line at the left and right ends of the outer vents from the bottom
edge of the bodywork up to a point two (2) inches below the crease at the lower edge of the vented panel. Make a vertical cut at
each line. The horizontal cut is to be one (1) inch below the crease at the base of the vented panel. Leave a one (1) inch radius at
each corner. Air Scoop (P/N 190000) must be installed in conjunction with rear cutout per Enterprises installation instructions.
SRF3 tail sections are allowed on SRFs. For purposes of tail section to center section fitment with the GEN3 airbox, shimming is
allowed at the rear of the center section. Shim material may be up to 19 mm (0.75") thick along the 1" upper square sidepod

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tube. Mounting location cannot be modified or added. Shim material must be securely attached, but must not be welded.
An alternate dash panel has been approved for use in Spec Racer Fords. The dash will be furnished by Enterprises only. P/N
180100 or 180101
k. Required Bodywork Modification:
A 22.5" diameter wheel arch shall be cut in each side of the tail section. Viewing the tail section from the side, draw a vertical
line at the drive axle centerline. Locate the top of the wheel arch at a point measured from the bottom edge of the tail section
9.25" vertically along the centerline. The 22.5" diameter circle intersects the bottom edge of the tail section 11.1" either side of
the centerline. The tail section may be reinforced in the forward and aft portions of the wheel arch. Dimension tolerance is +/-
0.75".
l. An alternate dash panel has been approved for use in Spec Racer Fords. The dash will be furnished by Enterprises only. P/N
180100 or 180101."

SRF3 Update SRF Front W2 Rain Tire Part Number

#34118 from Robey Clark · Rule change · TB 23-05 (2023-05 Fastrack)

Summary

tyres & wheelsSRF Hoosier front rain tyre part number changes from 46100 to 46101 P185/65R13 W2.

As printed in Fastrack

In SRF, GCR section 9.1.8.D.1.X.f, change as follows:
"Front – Hoosier P/N 46100 1 P185/65R13 W2"

SRF3 Hoosier SRF Wet Front Tire Rule Update

#34189 from Robey Clark · Rule change · TB 23-06 (2023-06 Fastrack)

Summary

unclearSRF Hoosier wet front tire updated to P/N 46100 P185/60R13 H20 or W2.

As printed in Fastrack

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."

FC USF2000 Van Diemen with Mazda MZR LF-DE 2.0L in FC

#34329 from Formula/Sports Racing Committee · Rule change · TB 23-06 (2023-06 Fastrack)

Summary

cars addedUSF2000 Van Diemen with Mazda MZR LF-DE 2.0L added as spec line car in FC; removed from FX.

As printed in Fastrack

RM 23-07, USF2000 Van Diemen with Mazda MZR LF-DE 2.0L in FC, GCR section 9.1.1.B.1, add a new section and re-letter the
following sections accordingly:
"c. The USF2000 tube frame Van Diemen car powered by the Mazda MZR LF-DE 2 liter engine is added as a "spec line" car 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."
In FC, GCR section 9.1.1.B.11, add the following:
"The only permitted engines are:
a. The Ford 2 liter single overhead camshaft "NE" series engine or the 1971-74 Pinto/Capri 2 liter single overhead camshaft

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engine. The specifications are contained in B.15.
b. The Ford Zetec ZX3 2 liter dual overhead camshaft engine. The specifications are contained in B.16.
c. The Mazda MZR LF-DE 2 liter for use only in USF2000 cars, as described in the Spec Line Cars Table below."
In FC, GCR section 9.1.1.B, add the following:
In FX, GCR section 9.1.1.J.B, change as follows and renumber the remaining lines accordingly:
"3. USF2000 (tube frame) – Shall comply with FRP F2000 Technical Specifications (2018)
4. Pro Formula F2000 (tube frame) – Engine must be prepared to current FC rules."
In FX Table 1, remove the USF2000 Tube Frame and Pro Formula F2000 Tube Frame spec lines in their entirety.
Spec Line Cars Table

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

FC Review FC Runoffs Tire Marking Rule

#34274 from SCCA Staff · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

wordingFC tire marking rule clarified: four dry and wet tires for Regionals, eight each for Runoffs; damaged tire replacement procedures revised.

As printed in Fastrack

In FC, GCR section 9.1.1.B.10.h, change as follows:
"FC shall be 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 rule shall be is effective beginning with the first (1st)
qualifying session of the event. Marked tires are not required for testing or practice. It is the competitor's responsibility to
ensure that the tires are declared, marked, and logged by Tech in advance of the tire(s) being used in a qualifying session or
race. Failure to participate on marked tires will result in a penalty.
1. Use of an undeclared tire shall automatically result in all times being disallowed in that session or finishing position in that
race.

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2. 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 Chief Steward without loss of time or finishing position. Second or subsequent damaged tires may similarly be
replaced upon approval by the Chief Steward, however but such shall will result in the loss of grid position in the subsequent race
or session; the competitor shall will start at the back of the grid. Replacement of a damaged tire with a new tire upon approval by
the Chief Steward will result in loss of grid position in the subsequent race or session."

SRF3 SRF Radiator Rule Update

#34805 from Robey Clark · Rule change · TB 23-10 (2023-10 Fastrack)

Summary

wordingSRF radiator rule clarified: P/N 480466 replaceable with Automotive P/N 1R698, CU698 or manufacturer equivalent with documentation.

As printed in Fastrack

In SRF, GCR section 9.1.8.D.1.V.j, change as follows:
"Radiator - Enterprises new style P/N 480465 (requires baffle P/N 480464) or P/N 480466 can be used. P/N 480466, may can be
replaced with Automotive P/N 1R698, CU698 or equivalent OEM manufacturer justified by one cross-reference chart equivalent,
as long as the size, shape, and material are the same as the original P/N. The capacity, core thickness, etc., cannot be changed
even if allowed under the above. The competitor is responsible for providing this documentation of the cross-reference P/N."

FV FV Wheel Bearing Clarification

#35150 from Formula/Sports Racing Committee · Rule change · TB 23-12 (2023-12 Fastrack)

Summary

wordingFV front wheel bearings wording clarified in GCR 9.1.1.C.10.G.

As printed in Fastrack

In FV, GCR section 9.1.1.C.10.G, change as follows:
"Front W wheel bearings"

SRF3 Update SRF Rain / Brake Rule

#34706 from Robey Clark · Rule change · TB 23-09 (2023-09 Fastrack)

Summary

wordingSRF rain/brake light now requires Super Bright LEDs Inc. P/N PT-STRB-R24 with specific connector and rain light switch.

As printed in Fastrack

In SRF, GCR section 9.1.8.D.1.W.l, change as follows:
"A Super Bright LEDs Inc. rain / brake light comprised of a single standard trailer oval lamp, 2-1/4 inches x 6-1/2 inches, with
incandescent or LED illumination, P/N PT-STRB-R24, is required in the original roll hoop mounting location. This rule supersedes
GCR section 9.3.32.B.2 effective 1/1/2024 through 12/31/2024. No changes may be made to the original 3-pin connector on the
wiring harness. The secondary filament of the brake light assembly shall must be connected to a switch enabling its use as a rain
light."

SRF3 Update SRF Brake Light Rule v1

#34853 from Robey Clark · Rule change · TB 23-10 (2023-10 Fastrack)

Summary

wordingSRF requires Super Bright LEDs P/N PT-STRB-R24 rain/brake light with strobing capability and specific wiring.

As printed in Fastrack

In SRF, GCR section 9.1.8.D.1.W.l, change as follows:
"A Super Bright LEDs Inc. P/N PT-STRB-R24 (SCCA Enterprises P/N 180427A) rain / brake light, P/N PT-STRB-R24, is required in the
original roll hoop mounting location. This rule supersedes GCR section 9.3.32.B.2 effective 1/1/2024 through 12/31/2024. No
changes may be made to the original 3-pin connector on the wiring harness. An SCCA Enterprises P/N 1190503 Strobing Brake
Light Pigtail is required. The secondary filament of the brake light assembly must be connected to a switch enabling its use as
a strobing rain light. A Strobing Brake Light Kit P/N 1168003 is available, which includes the brake light and pigtail."

FC Please correct omitted punctuation

#34890 from Club Racing Board · Rule change · TB 23-10 (2023-09 Fastrack)

Summary

engineF600 Rotax 494, 493, 593 engines now require single expansion chamber and pull starter; electric starter optional.

As printed in Fastrack

In Cars and Equipment, GCR section 9.3.33.B.2, add the following:
"(Effective 1/1/2024) A red taillight meeting FIA Standard 8874-2019, Technical List No. 76, is required on all Formula (open
wheel) and Sports Racing cars."
In Appendix F. Technical Glossary, Minimum Weight, change as follows:
"Minimum Weight: – Weight specified with driver, exactly as they come off the race circuit, at the conclusion of any race or
qualifying session."
In FA Table 1, Spec Line E notes, add the following:
"Any BD series iron or alloy cylinder block and alternate crankshaft permitted."

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In FC, GCR section 9.1.1.B.11.c, change as follows:
"The Mazda MZR LF-DE 2 liter for use only in USF2000 cars, as described in the Spec Line Cars Table below.""
In F600, GCR section 9.1.1.D.14, add the following:
"Rotax Model 494, Model 493, and Model 593 must use a single expansion chamber and must be equipped with a pull starter;
an electric starter may be added."
In P1, GCR section 9.1.8.B.J.2, add the following:
"Where a flat plate intake restrictor, restricted venturi, or Single Inlet Restrictor (SIR) is required, all intake air for each cylinder
or the entire fuel-air mixture, if prepared before this point, must pass through the restrictor."

SRF3 SRF / SRF3 Rule Updates

#35268 from Robey Clark · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

otherSRF adds brake duct and pedal extension rules, rear shift cable clamp option, camber limit to 5.0°, radiator opening height 3.5" ±0.5", and P2 engine restrictor changes.

As printed in Fastrack

In SRF, GCR section 9.1.8.D.1.H, add the following:
"NO MODIFICATIONS ALLOWED. Front brake ducts are required, attached to the openings in the lower radiator baffles, any
flexible 4" duct material allowed, installed length minimum 12" maximum 36" in length. Must be securely fastened, Bracket Part
# P/N 800368 can be used. Shall Must serve no other purpose. An extension may be welded to the side of the throttle pedal to
improve heel-and-toe braking. Master cylinder casting / location must be used as delivered on P/N 180110 Pedal Mounting
support. Aeroquip style -3 braided stainless flex lines only, must attach to all brake components without modification. Brake pad
"anti-rattle" clips must be removed."
In SRF, GCR section 9.1.8.D.1.V, add the following:

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"ii. Rear SADEV shift cable aluminum two-piece style clamp may be used. The P/N WM302007A clamp must serve no other
purpose."
In SRF, GCR section 9.1.8.D.1.X.k, add the following:
"Negative camber shall must not exceed 5.0 degrees absolute maximum front and rear."
In SRF, GCR section 9.1.8.D.1.AA.b, add the following:
"2. Height of the radiator opening vertical surface 3 1/2“ +/- 1/2"."
P2 Engine Table B.1
2008 and older Stock
Suzuki, Yamaha,
Honda, BMW
38.5mm
P2 Engine Table B.2 Not required
P2 Engine Table B.3 38.5mm
Modified
Engine
950 lbs.
1005cc max
P2 Engine Table B.1
2008 and older 37mm
P2 Engine Table B.2 Not required
P2 Engine Table B.3 39mm
Stock Engine
1050 lbs.

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)

Summary

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

As printed in Fastrack

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)

Summary

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

As printed in Fastrack

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)

Summary

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

As printed in Fastrack

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)

Summary

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

As printed in Fastrack

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)

Summary

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

As printed in Fastrack

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)

Summary

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

As printed in Fastrack

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)

Summary

wordingSRF3 Hoosier logo placement changes from four decals to three decals in different locations.

As printed in Fastrack

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)

Summary

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

As printed in Fastrack

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)

Summary

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

As printed in Fastrack

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)

Summary

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."

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)

Summary

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

As printed in Fastrack

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)

Summary

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

As printed in Fastrack

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)

Summary

wordingSRF3 brakes restructured: Hawk Blue 801993 pads, Wilwood 800065 rotors only; adds Girling 880358, Wilwood 880357, Tilton 880360 master cylinders.

As printed in Fastrack

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)

Summary

otherSRF3 adds HD Oil Cooler P/N G1148500 as alternative to standard cooler P/N G480503.

As printed in Fastrack

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)

Summary

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

As printed in Fastrack

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)

Summary

fasterFC F2000 Metrik ZF2 minimum weight reduced to 1220 lbs.

As printed in Fastrack

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.