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BoP Lab / Buttonwillow Raceway Park

SRF3 + FC + AS 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
1Van 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
2Van 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
3Van 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
4Van 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
5SCCA 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
6SCCA 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
7SCCA 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
8SCCA 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
9SCCA 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
10SCCA 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
11SCCA 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
12SCCA 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
13SCCA 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
14SCCA 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
15SCCA 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
16SCCA 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
17SCCA 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
18SCCA 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
19SCCA 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
20SCCA 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
21SCCA 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
22SCCA 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
23SCCA 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
24SCCA 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
25SCCA 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
26SCCA 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
27SCCA 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
28SCCA 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
29SCCA 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
30SCCA 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
31SCCA 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
32SCCA 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
33SCCA 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
34SCCA 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
35SCCA 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
36SCCA 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
37SCCA 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
38SCCA 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
39Ford MustangRoger EagletonAS111:55.849 B-R11:55.5691:56.445 B-Q11:55.849 B-R11:56.324 B-R1+0.678 B-R1108.7 B-R131.659 B-Q133.571 B-R150.339 B-R1
40Ford MustangRoss MurrayAS14, 741:56.314 A-R11:56.0471:56.812 A-Q11:56.314 A-R11:56.660 A-R1+0.887 A-R1135.2 A-R232.070 A-R133.689 A-R150.288 A-R1
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
46Ford Mustang FR500SPratt ColeAS8, 8x1:58.795 B-R11:58.0781:59.911 B-Q11:58.795 B-R11:59.396 B-R1+1.547 B-R1103.3 B-Q132.531 B-R133.997 B-R151.550 B-R1
47Ford MustangMatt LituchyAS301:59.134 B-R11:58.7322:00.395 B-Q11:59.134 B-R11:59.643 B-R1+0.914 B-R1105.1 B-Q132.777 B-R134.259 B-R151.696 B-R2
48Ford MustangMichael LoweAS102:00.612 A-R22:00.1262:03.053 A-Q12:00.612 A-R22:02.546 A-R2+4.568 A-R2126.5 A-R132.652 B-R134.913 B-R152.561 A-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 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
Ford MustangAS51:55.849Roger Eagleton1:56.445Roger Eagleton1:55.849Roger Eagleton135.2Ross Murray31.659Roger Eagleton33.571Roger Eagleton50.288Ross Murray
Van Diemen RFFC11:58.213Greg Pizzo2:10.106Greg Pizzo1:58.213Greg Pizzo127.3Greg Pizzo32.045Greg Pizzo34.162Greg Pizzo51.126Greg Pizzo

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

AS Request to Classify 1970-1981 Camaro and Firebird in AS

#33659 from Brandon Vivian · Rule change · TB 24-03 (2024-03 Fastrack)

neutralChevrolet Camaro, Pontiac Firebird 70-81 Full Prep classified AS at 3400-3600 lbs with 250 lb weight reduction.

In AS Spec Lines, classify Chevrolet Camaro, Pontiac Firebird (70-81) Full Prep as follows:
AS Wheelbase Gear Ratios
Std. (or Alt.)
Brakes
(Max)
(in/mm)
Weight (lbs) Notes:

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

AS Fuel Cell 12

#34194 from Clark Cambern · Rule change · TB 24-03 (2024-03 Fastrack)

neutralAS class: multiple cars gain fuel cell placement note allowing 24 inches from standard tank, unrestricted filler location.

In AS Spec Lines, add to Notes as follows:
Cadillac CTS-V (04-07): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken
from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell.”
Chevrolet/Pontiac Camaro & Firebird (93-02): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch
measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with
installation of a safety fuel cell.”
Chevrolet/Pontiac Camaro & Firebird (93-02): “Fuel cells must be located within 24 inches of the standard tank. The 24
inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with

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installation of a safety fuel cell.”
Chevrolet Camaro SS (V8) (10-15): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch
measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with
installation of a safety fuel cell.”
Chevrolet Camaro (10-15): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is
taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a
safety fuel cell.”
Dodge Challenger (08-20): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is
taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a
safety fuel cell.”
Ford Mustang GT (05-14): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is
taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a
safety fuel cell.”
Ford Mustang Coupe GT (05-14): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch
measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with
installation of a safety fuel cell.”
Ford Mustang GT 5.0l (15-17): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement
is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a
safety fuel cell.”
Ford Mustang GT (05-14): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is
taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a
safety fuel cell.”

AS Please Classify the 6th Gen Into AS.

#35448 from Daniel Richardson · Rule change · TB 24-03 (2024-03 Fastrack)

neutralChevrolet Camaro 16- Full Prep classified into AS at 3400 lbs with 250 lb weight reduction.

In AS Spec Lines, classify Chevrolet Camaro (16-) Full Prep as follows:
AS
Wheelbase Gear Ratios
Std. (or Alt.)
Brakes
(Max)
(in/mm)
Weight (lbs) Notes:

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Chevrolet
Camaro (16-)
Full Prep
110.6 3.42, 2.28,

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

AS spec lines

#35713 from American Sedan Committee · Rule change · TB 24-03 (2024-03 Fastrack)

neutralAS adds Ford Mustang GT 05-14 Restricted prep Engine with 62mm FPR, 3400 lbs minimum, 18-inch wheels.

In AS Spec Lines, classify Ford Mustang GT (05-14) with Restricted prep Engine as follows:
AS
Wheelbase Gear Ratios Std.

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

Applies to Ford Mustang on this page: Roger Eagleton, Ross Murray, Matt Lituchy, Michael Lowe, Pratt Cole

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.

AS Restricted Prep Aftermarket Parts Request

#35682 from Tom Aquilante · Rule change · TB 24-04 (2024-04 Fastrack)

neutralAS Camaro/Firebird and GTO LS1 connecting rods approved: Callies CSC6100DS6A2AH, Scat 2-1CR6100-944, GM 12649190.

In AS Spec Lines, Chevrolet/Pontiac Camaro & Firebird (93-02), add to Notes the following:
"For the LS1connecting rods Callies p/n CSC6100DS6A2AH, Scat rods p/n 2-1CR6100-944, GM performance rods p/n 12649190."
In AS Spec Lines, Pontiac GTO (04-06), add to Notes the following:
"For the LS1connecting rods Callies p/n CSC6100DS6A2AH, Scat rods p/n 2-1CR6100-944, GM performance rods p/n 12649190."

AS Allowance of 11

#35824 from American Sedan Committee · Rule change · TB 24-04 (2024-04 Fastrack)

fasterAS Cadillac CTS-V, Chevrolet Camaro SS, Dodge Challenger, Ford Mustang GT, Pontiac GTO allowed 11" wheels until 3/1/25.

In AS Spec Lines, Cadillac CTS-V (04-07), add to Notes the following:
"11" wide wheels can be used until 3/1/25."
In AS Spec Lines, Chevrolet Camaro SS (V8) (10-15), add to Notes the following:
"11" wide wheels can be used until 3/1/25."
In AS Spec Lines, Dodge Challenger (08-20), add to Notes the following:
"11" wide wheels can be used until 3/1/25."
In AS Spec Lines, Ford Mustang GT 5.0l (15-17), add to Notes the following:
"11" wide wheels can be used until 3/1/25."

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In AS Spec Lines, Pontiac GTO (04-06), add to Notes the following:
"11" wide wheels can be used until 3/1/25."

Applies to Ford Mustang on this page: Roger Eagleton, Ross Murray, Matt Lituchy, Michael Lowe, Pratt Cole

AS 6th gen Camaro limited prep

#35733 from American Sedan Committee · Rule change · TB 24-05 (2024-05 Fastrack)

neutralAS Chevrolet Camaro 1LE (2016-) classified with 3600 lbs minimum weight, 60mm restrictor, 275 tires.

In AS Spec Lines, classify Chevrolet Camaro 1LE (2016-) as follows:
AS Wheelbase Gear Ratios Std. (or Alt.)
Brakes
(Max)
(in/mm)
Weight (lbs.) Notes:
Chevrolet
Camaro, 1LE

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(2016-)
110.6 2.66,1.78,1.30,0.74,.5 (F)

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

AS Chevrolet/Pontiac Camaro & Firebird (82-92) 5.7L V8 LS1 Alum BLK

#35825 from Desi Colon · Rule change · TB 24-05 (2024-05 Fastrack)

neutralAS Chevrolet/Pontiac Camaro & Firebird 82-92 5.7L LS1 classified at 3200 lbs with 65mm restrictor plate required.

In AS Spec Lines, classify Chevrolet/Pontiac Camaro & Firebird (82-92) 5.7L V-8 LS1 (Aluminum Block, Aluminum Heads) 2 valves
per cylinder, as follows:
AS Wheelbase Gear Ratios Std.

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

AS Full Prep Head

#35891 from American Sedan Committee · Rule change · TB 24-05 (2024-05 Fastrack)

neutralAS Chevrolet Camaro, Firebird, and Ford Mustang models permitted to use Flo Tek cylinder heads.

In AS Spec Lines, Chevrolet/Pontiac Camaro & Firebird (82-92), add to Notes the following:
"Flo Tek Head part #102-500 are permitted."
In AS Spec Lines, Chevrolet/Pontiac Camaro & Firebird (93-02), add to Notes the following:
"Flo Tek Head part #102-500 are permitted."
In AS Spec Lines, Chevrolet Camaro (10-15), add to Notes the following:
"Flo Tek Head part #102-500 are permitted."
In AS Spec Lines, Ford Mustang Incl. Cobra & Cobra R (79-93) and Mercury Capri (79-86), add to Notes the following:
"Flo Tek Part # 203-500 are permitted."

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In AS Spec Lines, Ford Mustang Including Cobra 94-04, add to Notes the following:
"Flo Tek Part # 203-500 are permitted."
In AS Spec Lines, Ford Mustang GT (05-14), add to Notes the following:
"Flo Tek Part # 203-500 are permitted."

Applies to Ford Mustang on this page: Roger Eagleton, Ross Murray, Matt Lituchy, Michael Lowe, Pratt Cole

AS Request for Classification of 2018-2023 mustang In

#35764 from Michael Kamalian · Rule change · TB 24-06 (2024-06 Fastrack)

neutralAS Ford Mustang GT 5.0L (2018-) classified at 3600 lbs with 60mm restrictor, Brembo BBK permitted.

AS Spec Lines, classify Ford Mustang GT 5.0L (2018-) as follows:
AS Wheelbase Gear Ratios

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."

AS Mustang transmission ratios

#36662 from American Sedan Committee · Rule change · TB 24-09 (2024-09 Fastrack)

unclearAS Ford Mustang GT models gain alternate transmission ratio options for 2024-09-01.

In AS Spec Lines, Ford Mustang GT (05-14) with Restricted Prep Engine, add to Notes as follows:
"Alternate transmission Ratios 3.66, 2.43, 1.69, 1.32, 1.00, .68.”
In AS Spec Lines, Ford Mustang GT 5.0L (2018-), add to Notes as follows:
"Alternate transmission Ratios 3.24, 2.10, 1.42, 1.00, 0.81, .062."

Applies to Ford Mustang on this page: Roger Eagleton, Ross Murray, Matt Lituchy, Michael Lowe, Pratt Cole

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."

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."

AS Increase Coyote Engine Restrictor to 80mm

#36177 from Gregory Eaton · Rule change · TB 25-01 (2025-01 Fastrack)

fasterAS Ford Mustang Coyote engines increase restrictor to 80mm from 64mm or 67mm.

In AS Spec Lines, add to Notes as follows:
Ford mustang (GT 05-14): "Gen 1- 67mm Gen 2-64mm"
Ford mustang (GT 05-14): "Gen 1- 67mm"
Ford mustang (GT 15-17): "Gen 1- 67mm"
Ford mustang (GT 94-04): "Gen 1- 67mm Gen 2-64mm"
Ford mustang cobra & Cobra R Mercury Capri (79-93) (79-86): "Gen 1- 67mm Gen 2-64mm"

AS Performance Pack for 2015+ Mustang

#36867 from Michael Kamalian · Rule change · TB 25-01 (2025-01 Fastrack)

fasterAS Mustang GT 05-14 4.6L loses 300 lbs; 15-17 and 2018+ models lose 61mm and 60mm restrictors respectively.

In AS Spec Lines, Ford Mustang Coupe GT (05-14) Restricted Prep., change Notes as follows:
"The 4.6L engine assembly has a weight reduction of 300 lbs. 5.0L/6spd engine/trans: track pack front and rear spoiler allowed."
In AS Spec Lines, Ford Mustang Coupe GT (05-14) with Restricted Prep. engine, change Notes as follows:
"Max. Wheel Size: Dia.18.0 inches. Stock brakes or alternate Ford 14” Brembo Brake (Ford Racing Kit #M-2300-S) and full prep
brake package may be used. Either engine may be used. 1st Generation 5.0l Coyote 11-14 62mm FPR 2nd Generation 5.0l
Coyote 15-17 61mm FPR Cold Air Intake allowed Charge Motion Control Valves can be blocked off and removed for firewall
clearance Allow Cold Air Intake Tremec Magnum transmission may be used P/N- TUKT16901. Full Prep Transmissions rule
package may also be used. Max compression ratio, 11.2:1 track pack front and rear spoiler allowed. Alternate transmission

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Ratios 3.66, 2.43, 1.69, 1.32, 1.00, .68."
In AS Spec Lines, Ford Mustang GT 5.0l (15-17) Restricted Preparation, change Notes as follows:
"Max. Wheel Size: Dia. 18.0 inches. Stock brakes or alternate Ford Brembo Brake caliper (Ford Racing Kit #M-2300-S) may be
used. 61mm flat plate restrictor required. Fuel cells must be located within 24 inches of the standard tank. The 24 inch
measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation
of a safety fuel cell. 11” wide wheels can be used until 3/1/25. Performance pack front and rear spoiler, body kit allowed."
In AS Spec Lines, Ford Mustang GT 5.0L (2018-), change Notes as follows:
"Package Brembo front BBK and 380mm rotors permitted (Ford PN M-2300-V) at no weight penalty. 60mm flat plate restrictor
required. 2014 Mustang GT exhaust manifolds permitted. Ford Racing oil pan #M-6675-M50BR permitted. Alternate
transmission Ratios 3.24, 2.10, 1.42, 1.00, 0.81, .062. Performance pack front and rear spoiler, body kit allowed."

Applies to Ford Mustang on this page: Roger Eagleton, Ross Murray, Matt Lituchy, Michael Lowe, Pratt Cole

AS Gear Ratios

#37131 from Timothy White · Rule change · TB 25-01 (2025-01 Fastrack)

neutralAS class gear ratio options specified for multiple American muscle cars, including Cadillac CTS-V, Chevrolet Camaro, Ford Mustang, Dodge Challenger, and Pontiac GTO.

In AS Spec Lines, change Gear Ratios as follows:
Cadillac CTS-V (04-07):
"2.97, 2.07, 1.43,1.00, 0.84,0.56 or 3.01, 2.07, 1.43, 1.0, .84, .57 or 2.20, 1.64,1.28,1.00 or 2.88, 1.91, 1.33, 1.00"
Chevrolet Camaro, Pontiac Firebird (70-81), Full Prep:
"3.42, 2.28, 1.45, 1.00 or 2.95, 1.94, 1.34, 1.00, 0.73 or 3.35, 1.93, 1.29, 1.00, 0.61, or 2.20, 1.64,1.28,1.00 or 2.87,1.89,1.28,1.00"
Chevrolet Camaro, Pontiac Firebird (70-81), Restricted Prep.:
"3.42, 2.28, 1.45, 1.00 or 2.95, 1.94, 1.34, 1.00, 0.73 or 3.35, 1.93, 1.29, 1.00, 0.61, or 2.20, 1.64,1.28,1.00 or 2.87,1.89,1.28,1.00"
Chevrolet/Pontiac Camaro & Firebird (82-92) Full Prep:

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"3.42, 2.28, 1.45, 1.00 or 2.95, 1.94, 1.34, 1.00, 0.73 or 3.35, 1.93, 1.29, 1.00, 0.61 or 2.20, 1.64,1.28,1.00 or 2.88, 1.91, 1.33,
1.00"
Chevrolet/Pontiac Camaro & Firebird (93-02) Full Prep:
"3.42, 2.28, 1.45,1.00 or 2.95, 1.94,1.34, 1.00,0.73or 3.35, 1.93,1.29, 1.00,0. 61 or 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00,
0.68 or 2.20,1.64,1.28,1.00 or 2.87,1.89,1.28,1.00,.81"
Chevrolet/Pontiac Camaro & Firebird (93-02) Restricted prep:
"2.97, 2.07, 1.43, 1.00, 0.80, 0.62 or 3.36, 2.07, 1.35, 1.00, .80, .62 or 2.66, 1.78, 1.30, 1.00, 0.74, 0.50 or 2.88, 1.91, 1.33, 1.00 or
2.20, 1.64,1.28,1.00"
Chevrolet Camaro SS (V8) (10-15) Restricted Prep:
"3.01, 2.07, 1.43, 1.0, .84, .57 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00"
Chevrolet Camaro (10-15) Full Prep:
"3.42, 2.28, 1.45,1.00 or 2.95, 1.94,1.34, 1.00, 0.73or 3.35, 1.93,1.29, 1.00,0. 61 or 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00,
0.68 or 2.20, 1.64,1.28,1.00 or 2.87,1.89,1.28,1.00,.81"
Chevrolet Camaro (16-) Full Prep:
"3.42, 2.28, 1.45,1.00 or 2.95, 1.94,1.34, 1.00, 0.73or 3.35, 1.93,1.29, 1.00,0. 61 or 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00,
0.68 or 2.20, 1.64,1.28,1.00 or 2.87,1.89,1.28,1.00,.81"
Chevrolet Camaro, 1LE (16-):
"2.66,1.78,1.30, 0.74,.50 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00"
Dodge Challenger (08-20) Restricted Preparation 5.7L, 6.1L, or 6.4L V8 (Iron block, Aluminum heads), 2 valves/cylinder:
"2.97, 2.1, 1.46, 1.00, 0.74, 0.50 or 2.26, 1.58, 1.19, 1.00, 0.77, 0.63 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00"
Ford Mustang Incl. Cobra & Cobra R (79-93) and Mercury Capri (79-86) Full Prep:
"3.07, 1.72, 1.00, 0.70 or 2.95, 1.94, 1.34, 1.00, 0.63 or 3.35, 1.99, 1.33, 1.00, 0.68 or 2.87 1.89 1.28 1.00 0.81"
Ford Mustang Incl. Cobra & Cobra R (79-93) and Mercury Capri (79-86) with Restricted Prep Engine:
"2.95, 1.94, 1.34,1.00, 0.63 or 3.35,1.99,1.33, 1.00, 0.69 or 2.88, 1.91, 1.33, 1.00 or 3.27,1.98, 1.34, 1.00, 0.68, 3.66, 2.43, 1.69,
1.32, 1.00, .68. or 2.87,1.89,1.28,1.00,.81"
Ford Mustang Including Cobra 94-04 Full Prep:
"3.07, 1.72, 1.00, 0.70 or 2.95, 1.94, 1.34, 1.00, 0.63 or 3.35, 1.99, 1.33, 1.00, 0.68 or 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34,
1.00, 0.68 or 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 or 2.20, 1.64,1.28,1.00 or 2.87 1.89 1.28 1.00 0.81"
Ford Mustang Cobra and GT 94-95 (Restricted Prep):
"3.35, 1.99, 1.33, 1.00, 0.68 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00"
Ford Mustang including Cobra 96-04 (Restricted Prep) 4.6L two and four valve motor:
"3.35, 1.99, 1.33, 1.00, 0.68 or 3.27, 1.98, 1.34, 1.00, 0.67 or 3.37, 1.99, 1.33, 1.00, 0.68 or 3.38, 2.00, 1.32, 1.00, 0.68 or 2.88,
1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00"
Ford Mustang GT (05-14) Full Prep:
"3.38, 2.00, 1.32, 1.00, 0.68 or 3.66, 2.43, 1.69,1.32, 1.00, 0.65 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00"
Ford Mustang GT 5.0l (15-17) Restricted Preparation:
"3.66, 2.43, 1.69,1.32, 1.00, .65 or 4.69, 2.98,2.14, 1.76,1.52, 1.27,1.00, 0.85, 0.68, 0.63, or 3.24, 2.10, 1.42, 1.00, 0.81, .062. or
2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00"
Ford Mustang GT 5.0L (2018-) Restricted Preparation:
"2.97, 2.07, 1.43, 1.00, 0.84, 0.57 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00"
Pontiac GTO (04-06) Restricted Prep.
"2.97, 2.07, 1.43, 1.00, 0.84, 0.57 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00"

AS ECU specs for LS engine

#37208 from Gary Mathews · Rule change · TB 25-01 (2025-01 Fastrack)

fasterAS LS-engine cars gain ECU freedom; Camaro/Firebird 93-02 LS1 removes fuel cell location restriction.

In AS SPEC LINES, Cadillac CTS-V (04-07) Restricted Prep., change Notes as follows:
"Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the
stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. Tremec TR6060
Transmission with 3.0 1, 2.07, 1.43, 1.0, .84, .57 ratios permitted. 11” wide wheels can be used until 3/1/25. Any ECM may be
used."
In AS SPEC LINES, Chevrolet Camaro, Pontiac Firebird (70-81) Restricted Prep ., add to Notes as follows:
"Any ECM may be used."
In AS SPEC LINES, Chevrolet/Pontiac Camaro & Firebird (82-92) 5.7L V-8 LS1, add to Notes as follows:

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"Any ECM may be used."
In AS SPEC LINES, Chevrolet/Pontiac Camaro & Firebird (93-02) Restricted Prep.5.7L V-8 LT1, add to Notes as follows:
"Any ECM may be used."
In AS SPEC LINES, Chevrolet/Pontiac Camaro & Firebird (93-02) Restricted Prep. 5.7L V-8 LT1; 98-02 , change Notes as follows:
"5.7L LS1:
GM Performance Parts camshaft Kit P/N-19355738 is permitted. Cylinder Bore, 99 mm; Stroke, 92 mm; Intake Valve Diameter,
50.8; Exhaust Valve Diameter, 39.4 mm; Throttle Body Bore, 75 mm; SLP Intake Lid (SLP part number 21044 (98-99) and 21045
(00-02)) is permitted.
Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the
stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell.
1-3/4 headers allowed. For the LS1connecting rods Callies P/NCSC6100DS6A2AH, Scat rods P/N2-1CR6100-944, GM performance
rods P/N12649190. Any ECM may be used."
In AS SPEC LINES, Chevrolet Camaro SS (V8) (10-15) Restricted Prep., add to Notes as follows:
"Any ECM may be used."

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

AS Race memo

#37902 from American Sedan Committee · Rule change · TB 25-03 (2025-03 Fastrack)

unclearAS Spec Lines removes ECM flexibility restriction from five Cadillac and Chevrolet/Pontiac V8 models.

In AS Spec Lines, change Notes as follows:
Cadillac CTS-V (04-07) Restricted Prep. 6.0L V8 (Aluminum block, Aluminum heads), LS2, 2 valves/cylinder:
"Any ECM maybe used."
Chevrolet Camaro, Pontiac Firebird (70-81) Restricted Prep. 6.2L V8 (Aluminum Block, Aluminum Heads), 2 valves per cylinder:
"Any ECM maybe used."
Chevrolet/Pontiac Camaro & Firebird (82-92)s 5.7L V-8 LS1 (Aluminum Block, Aluminum Heads) 2 valves per cylinder:
"Any ECM maybe used."
Chevrolet/Pontiac Camaro & Firebird (93-02):

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"Any ECM maybe used."
Chevrolet Camaro SS (V8) (10-15) Restricted Prep. 6.2L V8 (Aluminum Block, Aluminum Heads), 2 valves per cylinder:
"Any ECM maybe used."

AS Flotek Head Plunge Cut Inconsistencies

#37502 from Pamela Richardson · Rule change · TB 25-04 (2025-04 Fastrack)

unclearAS Flotek Head plunge cut dimensions figure updated in GCR Section 9.1.6.

In GCR, Section 9.1.6., replace Figure 1 Value Seat Cutting Dimensions with the following:

AS Notes clean up

#37693 from American Sedan Committee · Rule change · TB 25-04 (2025-04 Fastrack)

neutralAS class notes cleanup: multiple Camaro, Firebird, CTS-V, Challenger, Mustang specs and fuel cell/ECM/head restrictions removed.

In AS Spec Lines, change/add to Notes as follows:
Cadillac CTS-V (04-07):
"Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the
stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. Any ECM maybe used. The
Drive Shaft Shop, Axle shaft part #'s 510220/510221 permitted."
Chevrolet Camaro, Pontiac Firebird (70-81) Full Prep:
"Engine built to A/S Build Sheet specifications with the following: Head Casting #s: 14101081, 14014416 Port Volume (Max.): 081
casting: 170.00 cc IN/65.00 EX; 416 Casting 168.00cc IN/60.00 EX with a 250 lb. weight reduction. Edelbrock Cylinder Head Part

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#s 608979, 608879."
Chevrolet Camaro, Pontiac Firebird (70-81) Restricted Prep.:
"Any ECM maybe used."
Chevrolet/Pontiac Camaro & Firebird (82-92) Full Prep.:
"Engine built to A/S Build Sheet specifications with the following: Head Casting #s: 14101081, 14014416 Port Volume (Max.): 081
cast¬ing: 170.00 cc IN/65.00 EX; 416 Casting 168.00cc IN/60.00 EX with a 250 lb weight reduction. Edelbrock Cylinder Head Part
#s 608979, 608879 are permitted. For regional competition only, unmodified GM Performance cylinder head part #s 19300955,
19300956 may be used with Allstar restrictor plate part# ALL26180 and 1.250 inserts part# ALL26186 installed between intake
manifold and insulator. Gaskets may be used (each gasket can be no thicker than .125 inches), one on each side of the restrictor.
All intake air must pass through the inserts of the restrictor plate. Alternate gear ratio sets 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98,
1.34, 1.00, 0.68 are permitted. Flo Tek Head part #102-500 are permitted."
Chevrolet/Pontiac Camaro & Firebird (82-92) Restricted prep engine:
"Any ECM maybe used."
Chevrolet/Pontiac Camaro & Firebird (93-02) Full Prep:
"Engine built to A/S Build Sheet specifications with the following: Head Casting #’s: 14101081, 14014416; Port Volume (Max.):
081 casting: 170.00 cc IN/65.00 EX; 416 Casting 168.00cc IN/60.00 EX with a 250 lb weight reduction. Edelbrock Cylinder Head
Part #’s 608979, 608879 are permitted. For regional competition only, unmodified GM Performance cylinder head part #s
19300955, 19300956 may be used with Allstar restrictor plate part# ALL26180 and 1.250 inserts part# ALL26186 installed
between intake manifold and insulator. Gaskets may be used (each gasket can be no thicker than .125 inches), one on each side
of the restrictor. All intake air must pass through the inserts of the restrictor plate. Alternate gear ratio sets 2.88, 1.91, 1.33, 1.00
or 3.27, 1.98, 1.34, 1.00, 0.68 are permitted. Fuel cells must be located within 24 inches of the standard tank. The 24 inch
measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with
installation of a safety fuel cell. Flo Tek Head part #102-500 are permitted."
Chevrolet/Pontiac Camaro & Firebird (93-02) Restricted Prep:
"Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the
stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. Any ECM maybe used."
Chevrolet Camaro SS (V8) (10-15) Restricted Prep:
"Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the
stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. Any ECM maybe used."
Chevrolet Camaro (10-15) Full Prep:
"Engine built to A/S Build Sheet specifications with the following: Head Casting #’s: 14101081, 14014416; Port Volume (Max.):
081 casting: 170.00 cc IN/65.00 EX; 416 Casting 168.00cc IN/60.00 EX with a 200 lb weight reduction. Edelbrock Cylinder Head
Part #’s 608979, 608879 are permitted. Alternate gear ratio sets 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 are
permitted. Fuel cells must be located within 24 inches of the standard tank. The 24-inch measurement is taken from the
perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. Flo Tek
Head part #102-500 are permitted. Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is
taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel
cell."
Chevrolet Camaro (16-) Full Prep:
"Engine built to A/S Build Sheet specifications with the following: Head Casting #’s: 14101081, 14014416; Port Volume (Max.):
081 casting: 170.00 cc IN/65.00 EX; 416 Casting 168.00cc IN/60.00 EX with a 200 lb weight reduction. Edelbrock Cylinder Head
Part #’s 608979, 608879 are permitted, Flo Tek Head part #102-500 are permitted."
Chevrolet Camaro, 1LE (16-):
"60mm flat plate restrictor required. Any ECM maybe used."
Dodge Challenger (08-20) Restricted Preparation:
"80mm flat plate restrictor is required on the 6.4L engine. Fuel cells must be located within 24 inches of the standard tank. The
24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with
installation of a safety fuel cell."
Ford Mustang Incl. Cobra & Cobra R (79-93) and Mercury Capri (79-86) Full Prep:
"Engine built to A/S Build Sheet specifications with the following: Head Casting #s: F3ZE AA (GT40), F1ZE-AA (GT-40), F77E-AA
(GT- 40P), Port Volume (Max.): 143.00cc IN/54.00cc EX (GT-40 & GT-40P) with a 250 lb weight reduction. Edelbrock Cylinder
Head Part #s 602579, 602479 are permitted. For regional competition only, unmodified Ford Performance cylinder head part #s
M-6049-Z304DA7, M-6049-Z304D may be used with Allstar restrictor plate part# ALL26180 and 1.250 inserts part# ALL26186
installed between intake manifold and insulator. Gaskets may be used (each gasket can be no thicker than .125 inches), one on
each side of the restrictor. All intake air must pass through the inserts of the restrictor plate. Alternate gear ratio sets 2.88, 1.91,
1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 are permitted. Flo Tek Part # 203-500 are permitted."
Ford Mustang Incl. Cobra & Cobra R (79-93) and Mercury Capri(79-86) with Restricted Prep Engine:
"62mm flat plate restrictor is required. Fuel cells must be located within 24 inches of the standard tank. The 24 inch
measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with
installation of a safety fuel cell. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted."
Ford Mustang Including Cobra 94-04 Full Prep:
"Engine built to A/S Build Sheet specifications with the following: Head Casting #s: F3ZE AA (GT40), F1ZE-AA (GT-40), F77E-AA
(GT- 40P), Port Volume (Max.): 143.00cc IN/54.00cc EX (GT-40 & GT-40P) with a 250 lb weight reduction. Edelbrock Cylinder
Head Part #s 602579, 602479 are permitted. For regional competition only, unmodified Ford Performance cylinder head part #s
M-6049-Z304DA7, M-6049-Z304D may be used with Allstar restrictor plate part# ALL26180 and 1.250 inserts part# ALL26186
installed between intake manifold and insulator. Gaskets may be used (each gasket can be no thicker than .125 inches), one on
each side of the restrictor. All intake air must pass through the inserts of the restrictor plate. Alternate gear ratio sets 2.88, 1.91,
1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 are permitted. Flo Tek Part # 203-500 are permitted."
Ford Mustang GT (94-04) with Restricted Prep Engine:
"MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted."
Ford Mustang Cobra and GT 94-95(Restricted Prep):
"1st Generation 5.0l Coyote 11-14 62mm FPR 2nd Generation 5.0l Coyote 15-17 61mm FPR Alternate transmission Ratios 3.66,
2.43, 1.69, 1.32, 1.00, .68. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted."
Ford Mustang including Cobra 96-04 (Restricted Prep):
"1st Generation 5.0l Coyote 11-14 62mm FPR 2nd Generation 5.0l Coyote 15-17 61mm FPR Alternate transmission Ratios 3.66,
2.43, 1.69, 1.32, 1.00, .68. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted."
Ford Mustang Coupe GT (05-14) Restricted Prep.:
"1st Generation 5.0l Coyote 11-14 62mm FPR 2nd Generation 5.0l Coyote 15-17 61mm FPR Alternate transmission Ratios 3.66,
2.43, 1.69, 1.32, 1.00, .68. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted. MT82 6 speed is permitted."
Ford Mustang GT (05-14) with Restricted Prep Engine:
"1st Generation 5.0l Coyote 11-14 62mm FPR 2nd Generation 5.0l Coyote 15-17 61mm FPR Alternate transmission Ratios 3.66,
2.43, 1.69, 1.32, 1.00, .68. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted. MT82 6 speed is permitted."
Ford Mustang GT 5.0l (15-17) Restricted Preparation:
"61mm flat plate restrictor required. Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement
is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety
fuel cell. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted."
Ford Mustang GT 5.0L (2018-):
"60mm flat plate restrictor required. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted."

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"

AS Errors and Omission

#38055 from American Sedan Committee · Rule change · TB 25-05 (2025-05 Fastrack)

slowerAS Ford Mustang GT 5.0L (15-17) flat plate restrictor reduced from 67mm to 64mm.

In AS Spec Lines, Ford Mustang GT 5.0l (15-17), Flat Plate Restrictor Size, change as follows:
"67mm 64mm"

AS Request to Add LS1/LS6 Intakes for 5.3L Truck Engine EnO

#38197 from Jim Clark · Rule change · TB 25-05 (2025-05 Fastrack)

neutralAS LS1/LS6 5.3L truck engine gains four approved intake part numbers: 12561269, 88894095, 89017363, 89017364.

In GCR, Section 9.1.6.F., add the following to Intake Part #’s:
"17113697, 19418185, 89017230, 89017363, 89017364, and 89017365, 12561269 and 88894095"

AS Errors and Omissions

#38234 from American Sedan Committee · Rule change · TB 25-06 (2025-06 Fastrack)

neutralAS Ford Mustang GT 05-14 Restricted Prep Engine gains alternative gear ratios: 3.66, 2.43, 1.69, 1.32, 1.00, .65

In AS Spec Lines, Ford Mustang GT (05-14) with Restricted Prep Engine, add to Gear Ratios the following:
"or 3.66, 2.43, 1.69, 1.32, 1.00, .65"

Applies to Ford Mustang on this page: Roger Eagleton, Ross Murray, Matt Lituchy, Michael Lowe, Pratt Cole

AS RE: Previous Letter 37695 Update

#38245 from Michael Kamalian · Rule change · TB 25-07 (2025-07 Fastrack)

fasterAS Ford Mustang GT 5.0 2018- weight reduced from 3600 to 3525 lbs.

In AS Spec Lines, Ford Mustang GT 5.0 (2018-), change Weight as follows:
"3600 3525"

Applies to Ford Mustang on this page: Roger Eagleton, Ross Murray, Matt Lituchy, Michael Lowe

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."

AS Cadillac CTS-V BOP Weight Change

#38640 from Alex Lozano · Rule change · TB 25-09 (2025-09 Fastrack)

fasterAS Cadillac CTS-V 04-07 Restricted Prep weight reduced 50 lbs to 3400.

In AS Spec Lines, Cadillac CTS-V (04-07) Restricted Prep., change Weight as follows:
"(Effective 11/1/2025) 3450 3400"

AS 1994 Mustang Spec Line Request

#39104 from Barry Borgschatz, Jr · Rule change · TB 25-12 (2025-12 Fastrack)

unclearAS Ford Mustang GT 94-04 Restricted Prep Engine now permits Ford Motorsport M-6250-F303 camshaft.

In AS Spec Lines, Ford Mustang GT(94-04) with Restricted Prep Engine, add to notes the following:
"Ford Motorsport #M-6250-F303 camshaft is permitted."

Applies to Ford Mustang on this page: Roger Eagleton, Ross Murray, Matt Lituchy, Michael Lowe, Pratt Cole

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."

AS Restrictor Plate Change for Gen 2 Ford Coyote Engine

#39501 from American Sedan Committee · Rule change · TB 26-01 (2026-01 Fastrack)

slowerAS Ford Mustang Restricted Prep engines lose 3 mm restrictor plate, from 64 mm to 61 mm.

In AS Spec Lines, change Restrictor as follows:
Ford Mustang Incl. Cobra and Cobra R (79-93) and Mercury Capri (79-86) with Restricted Prep Engine: "64 mm 61 mm"
Ford Mustang GT (94-04) with Restricted Prep Engine: "64 mm 61 mm"
Ford Mustang Coupe GT (05-14) Restricted Prep 5.0L/6 speed 4 valves per cylinder: "64 mm 61 mm"
Ford Mustang GT (05-14) with Restricted Prep Engine: "64 mm 61 mm"
Ford Mustang GT 5.0L (15-17) Restricted Preparation: "64 mm 61 mm"

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"

AS Edelbrock manifold (& timing kit) to Chevy LS Spec Lines Request

#39055 from Jason Smith · Rule change · TB 26-01 (2026-01 Fastrack)

neutralAS Chevy LS adds Edelbrock Performer RPM 71187 intake manifold with MSD 6014 ignition and 4776 Holly carburetor as spec line option.

In GCR, Section 9.1.6.D.2.h.2., add the following:
"(Effective 2/1/2026) i. Weight based on full preparation chassis choice spec line for GM LM7 5.3L
Carburetor Option:
Must use the full prep 4776 holly carburetor and spacer gasket
Edelbrock Performer RPM 71187 intake manifold
MSD 6014 ignition box
(Edelbrock part # kit 7118)"

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