BoP Lab / Michelin Raceway Road Atlanta

AS + SRF + FF + EP at Michelin Raceway Road Atlanta

SRF has no laps in the events chosen. It ran at U.S. 2016: add that event.

Official results win over the timing feed: the live timing recorded a 1:31.797 for Porter Aiken in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:40.805 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:31.587 for Sebastian Mateo Naranjo in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:40.563 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:31.574 for Ely Navarro in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:40.256 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:31.421 for Callum Baxter in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:42.461 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:31.562 for Dillon Defonce in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:43.972 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:31.412 for Joe Colasacco in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:42.720 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:32.421 for David H Livingston Jr in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:44.261 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:32.554 for Karsten Defonce in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:43.630 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:34.531 for Camryn Reed in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:43.704 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:31.334 for Chris Smith in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:42.919 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:32.974 for Michael Bulzacchelli in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:42.266 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:31.059 for Robert Albani in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:35.956 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:34.710 for Ken Bouquillon in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:51.729 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:36.474 for Brian Graham in Super Tour Mar 2023 Grp 3 F6,FF,FV Race 1, but the official results credit 1:53.736 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:44.088 for Riley Salyer in Super Tour Mar 2023 Grp 6 EP,FP,Hp,GTL Race 1, but the official results credit 1:49.254 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:41.600 for Dan Carney in Super Tour Mar 2024 Grp 8 F6,FF,FV Race 1, but the official results credit 1:46.121 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:36.085 for Peter Norton in Super Tour Mar 2026 Grp 5 EP FP HP B-Spec Race 1, but the official results credit 1:43.188 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:36.492 for Tony Ave in Super Tour Mar 2026 Grp 5 EP FP HP B-Spec Race 1, but the official results credit 1:44.140 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:42.884 for Don Tucker in Super Tour Mar 2026 Grp 5 EP FP HP B-Spec Race 1, but the official results credit 1:53.452 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too; the live timing recorded a 1:41.732 for Thomas Burt in Super Tour Mar 2026 Grp 5 EP FP HP B-Spec Race 1, but the official results credit 2:03.732 as the car's fastest, so the timing system did not count that lap (usually a lap under a full-course yellow or a timing-loop fault); it is left out here too.

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

Pos	Car	Driver	Class	#	Lap	Theoretical	Qual	Race	5-lap stint	Consistency	Trap	S1	S2	S3
1	Piper DF05	Porter Aiken	FF	21	1:31.000 D-Q2	1:31.000	1:31.000 D-Q2	1:40.805 D-R2	1:43.226 D-R2	+3.039 D-R2	130.3 D-Q2	34.534 D-Q2	33.016 D-Q2	23.450 D-Q2
2	Swift DB6	John Robinson II	FF	19	1:31.242 D-R1	1:30.895	1:32.097 D-Q2	1:31.242 D-R1	1:32.292 D-R1	+1.746 D-R1	134.3 D-R1	34.930 D-Q2	32.498 D-R1	23.467 D-R1
3	Mygale SJ13	Sebastian Mateo Naranjo 2+ cars	FF	08	1:31.374 D-Q2	1:31.343	1:31.374 D-Q2	1:40.563 D-R2	1:43.220 D-R2	+3.262 D-R2	129.7 D-R2	34.878 D-Q2	33.066 D-Q2	23.399 D-Q2
4	Mygale GR	Ely Navarro	FF	01	1:31.621 D-Q2	1:31.549	1:31.621 D-Q2	1:40.256 D-R2	1:43.003 D-R2	+2.906 D-R2	128.8 D-Q2	34.676 D-Q2	33.300 D-Q2	23.573 D-Q2
5	Mygale F1600	David Ybarra	FF	06	1:31.691 A-R1	1:31.691	1:32.437 A-Q2	1:31.691 A-R1	1:32.944 A-R1	+1.826 A-R1	125.2 A-P	34.633 A-R1	33.438 A-R1	23.620 A-R1
6	Mygale SJ2014 (2014)	Sebastian Mateo Naranjo 2+ cars	FF	08	1:32.019 C-Q1	1:31.577	1:32.019 C-Q1	1:32.061 C-R2	1:32.398 C-R2	+1.179 C-R2	119.9 C-R2	34.874 C-R2	33.156 C-R2	23.547 C-R2
7	Van Dieman F1600	Trevor Russell	FF	32	1:32.266 D-R1	1:31.838	1:34.162 D-Q2	1:32.266 D-R1	1:32.747 D-R1	+1.246 D-R1	130.5 D-R1	34.751 D-R1	33.519 D-R1	23.568 D-R1
8	Mygale SJ14\Honda	Callum Baxter	FF	65	1:32.506 D-Q2	1:32.243	1:32.506 D-Q2	1:42.461 D-R2	1:44.275 D-R2	+2.115 D-R2	128.2 D-Q2	34.772 D-Q2	33.580 D-Q2	23.891 D-Q2
9	Mygale F1600	Jake Leroy	FF	03	1:32.585 A-R1	1:32.045	1:33.176 A-Q2	1:32.585 A-R1	1:33.093 A-R1	+1.221 A-R1	126.9 A-R1	34.841 A-R1	33.570 A-R1	23.634 A-R1
10	Mygale f1600	Dillon Defonce	FF	81	1:32.699 D-Q2	1:32.670	1:32.699 D-Q2	1:43.972 D-R2	1:44.941 D-R2	+1.958 D-R2	124.4 D-R2	34.968 D-Q2	33.927 D-Q2	23.775 D-Q2
11	Van Dieman FF	Joe Colasacco	FF	3	1:32.745 D-Q2	1:32.308	1:32.745 D-Q2	1:42.720 D-R2	1:44.386 D-R2	+2.740 D-R2	127.8 D-Q2	35.026 D-Q2	33.632 D-Q2	23.650 D-Q2
12	Acura Integra	David H. Livingston Jr	FF	85	1:33.339 D-Q2	1:33.339	1:33.339 D-Q2	1:44.261 D-R2	1:45.426 D-R2	+1.561 D-R2	128.8 D-Q2	40.795 D-R2	35.894 D-R2	23.988 D-Q2
13	Piper DL7\Honda (2019)	Antonio Costantino	FF	3	1:33.448 C-R2	1:33.279	1:34.562 C-Q1	1:33.448 C-R2	1:34.331 C-R2	+1.947 C-R2	119.9 C-Q1	35.684 C-R2	33.691 C-R2	23.904 C-R2
14	Mygale f1600	Karsten Defonce	FF	82	1:33.839 D-Q2	1:33.193	1:33.839 D-Q2	1:43.629 D-R2	1:46.422 D-R2	+3.483 D-R2	129.1 D-Q2	35.726 D-Q2	33.528 D-Q2	23.939 D-Q2
15	Piper DL7	Camryn Reed	FF	09	1:33.999 D-Q2	1:33.993	1:33.999 D-Q2	1:43.704 D-R2	1:46.909 D-R2	+4.296 D-R2	126.0 D-Q2	35.955 D-Q2	34.037 D-Q2	24.001 D-Q2
16	Piper DL7\Honda (2014)	Calum Dunbar	FF	12	1:34.054 C-R2	1:33.559	1:35.208 C-Q1	1:34.054 C-R2	1:35.082 C-R2	+1.807 C-R2	122.0 C-R2	35.895 C-R2	33.551 C-R2	24.113 C-R2
17	Van Diemen RF00	Chris Smith	FF	57	1:34.065 A-Q2	1:33.000	1:34.065 A-Q2	1:34.330 A-R1	1:35.329 A-R1	+2.069 A-R1	130.7 D-Q2	35.837 A-R1	33.160 D-Q2	24.003 A-Q2
18	Caterham Seven	Peter Norton	EP	50, 150	1:34.415 B-R2	1:34.105	1:35.116 B-Q2	1:34.415 B-R2	1:36.168 B-R2	+2.172 B-R2	129.1 D-Q1	36.424 B-R2	33.493 B-R2	24.188 B-R2
19	Mygale F1600	Axel Leroy	FF	75	1:34.544 A-R1	1:33.706	1:35.075 A-Q2	1:34.544 A-R1	1:35.585 A-R1	+1.219 A-R1	127.3 A-Q2	35.730 A-R1	33.981 A-Q2	23.995 A-Q2
20	Citation F1600	Miles Crabbe	FF	8	1:34.549 A-P	1:34.164	1:34.876 A-Q2	1:35.412 A-R1	1:36.482 A-R1	+1.687 A-R1	125.2 A-R1	35.861 A-P	34.169 A-R1	24.134 A-Q2
21	Ford Mustang	Michael Kamalian	AS	199, 99	1:34.642 A-R1	1:34.569	1:36.558 B-Q1	1:34.642 A-R1	1:36.577 A-R1	+7.895 A-R1	140.9 A-R1	37.067 A-R1	33.474 A-R1	24.028 A-R1
22	Piper DF-5	Michael Bulzacchelli	FF	93	1:34.842 D-Q2	1:34.649	1:34.842 D-Q2	1:42.266 D-R2	1:43.362 D-R2	+2.466 D-R2	126.2 D-R2	36.075 D-Q2	34.370 D-Q2	24.204 D-Q2
23	Mygale GR (2011)	Michael Dowden	FF	01	1:34.904 C-Q1	1:34.379	1:34.904 C-Q1	1:35.211 C-R2	1:35.816 C-R2	+1.248 C-R2	116.8 C-R1, C-R2	36.056 C-R2	34.048 C-R2	24.275 C-Q1
24	Van Diemen RF02 (2002)	Kevin Brumbaugh	FF	86	1:35.150 D-R1	1:35.029	1:36.770 D-Q2	1:35.150 D-R1	1:36.506 D-R1	+1.745 D-R1	129.5 D-Q2	36.763 D-R1	33.720 D-R1	24.546 D-Q2
25	Mygale SJ14H	Robert Albani	FF	41	1:35.262 D-Q2	1:34.394	1:35.262 D-Q2	1:36.359 D-R1	1:50.311 D-R2	+5.374 D-R2	135.6 D-Q1	33.334 D-R1	36.843 D-R2	24.217 D-Q2
26	Mygale Mygale SJ13	Ken Bouquillon	FF	83	1:35.276 D-Q2	1:35.102	1:35.276 D-Q2	1:51.729 D-R2	1:52.419 D-R2	+1.754 D-R2	127.3 D-Q2	36.828 D-Q2	33.810 D-Q2	24.464 D-Q2
27	BMW Z3 (1999)	Tyler Ladd	EP	151	1:35.300 B-Q2	1:34.994	1:35.300 B-Q2	1:35.659 B-R2	1:36.433 B-R2	+1.539 B-R2	127.2 B-R2	36.908 B-Q2	33.687 B-R2	24.399 B-Q2
28	Ford Mustang (2003)	Thomas J Ellis	AS	51	1:35.351 B-R2	1:34.701	1:35.467 B-Q2	1:35.351 B-R2	1:36.206 B-R2	+1.450 B-R2	138.3 B-R2	37.678 B-R2	32.639 B-Q2	24.384 B-R2
29	Ford Mustang (2006)	Gregory Eaton	AS	21	1:35.692 B-R2	1:35.295	1:36.767 B-Q2	1:35.692 B-R2	1:36.001 B-R2	+0.932 B-R2	132.5 B-R2	37.336 B-R2	33.408 B-Q2	24.551 B-R2
30	Ford Mustang GT (2008)	James Jost	AS	14	1:36.389 B-R2	1:35.532	1:38.195 B-Q2	1:36.389 B-R2	1:37.112 B-R2	+1.514 B-R2	138.6 B-Q1	38.069 B-R1	32.794 B-R2	24.669 B-R2
31	Piper DL7\Honda	Brian Graham	FF	2	1:36.690 D-Q2	1:36.305	1:36.690 D-Q2	1:53.737 D-R2	1:54.536 D-R2	+4.165 D-R2	124.2 D-R1	36.711 D-Q2	34.537 D-R1	25.057 D-Q2
32	Mazda MX-5	Tony Ave	EP	28	1:36.760 A-Q1	1:36.292	1:36.760 A-Q1	1:44.140 A-R2	1:45.007 A-R2	+3.837 A-R2	123.8 A-Q1	36.889 A-Q1	34.788 A-P	24.615 A-P
33	Spectrum 014H	Sam Lockwood	FF	70	1:37.862 A-Q2	1:37.435	1:37.862 A-Q2	1:38.186 A-R1	1:39.431 A-R1	+2.126 A-R1	122.9 A-Q2	37.748 A-Q2	34.842 A-Q2	24.845 A-Q2
34	BMW 328is (1998)	Bill Miller	EP	47	1:38.553 B-R2	1:38.126	1:40.619 B-Q2	1:38.553 B-R2	1:39.953 B-R1	+1.312 B-R1	129.0 B-R2	38.663 B-R1	34.089 B-R2	25.374 B-R2
35	BMW 325M-Technic	David Spillman	EP	136	1:38.814 D-R2	1:38.794	1:41.100 D-Q2	1:38.814 D-R2	1:40.184 D-R2	+3.868 D-R2	136.0 D-R1	39.364 D-R2	34.359 D-R2	25.071 D-R2
36	BMW Z3 (1999)	Doug Piner	EP	06	1:38.941 B-R2	1:38.256	1:39.293 D-Q2	1:38.941 B-R2	1:39.617 B-R2	+1.550 B-R2	132.3 D-Q2	38.639 B-R2	34.342 C-R2	25.275 C-R2
37	Alfa Romeo Spider (1967)	John Baucom	EP	86	1:39.735 B-R2	1:39.414	1:40.731 C-Q2	1:39.735 B-R2	1:40.858 B-R2	+2.452 B-R2	120.4 B-R2	38.674 B-R2	35.484 B-R2	25.256 B-R2
38	Mazda RX-7 (1986)	Sean Saggese	EP	148	1:40.833 C-R2	1:40.330	1:41.750 C-Q2	1:40.833 C-R2	1:41.477 C-R2	+1.713 C-R2	120.1 C-R2	38.946 C-Q2	35.692 C-R2	25.692 C-R2
39	Mazda Miata (1995)	Don Tucker 2+ cars	EP	8, 9	1:41.011 C-R2	1:39.718	1:41.023 C-Q2	1:41.011 C-R2	1:41.626 D-R1	+1.117 D-R1	124.7 D-R1	39.189 D-R1	35.131 C-R2	25.398 C-Q2
40	Mazda RX-7 (1986)	Thomas Burt 2+ cars	EP	0	1:42.289 B-R2	1:42.186	1:43.400 B-Q1	1:42.289 B-R2	1:43.641 B-R2	+2.129 B-R2	111.8 B-Q1	38.995 B-R2	37.095 B-R2	26.096 B-R2
41	BMW Z3	Don Tucker 2+ cars	EP	9	1:43.056 A-Q1	1:42.222	1:43.056 A-Q1	1:53.452 A-R2	2:01.834 A-R2	+9.997 A-R2	124.5 A-Q1	39.963 A-Q1	35.835 A-Q1	26.424 A-Q1
42	Mazda RX-7 Roadster	Michael Cooke	EP	17	1:43.939 D-Q1	1:43.633	1:43.939 D-Q1	1:49.636 D-R2	1:50.440 D-R2	+2.830 D-R2	117.2 D-Q1	39.882 D-Q1	37.142 D-Q1	26.609 D-Q1
43	Mazda RX-8	Thomas Burt 2+ cars	EP	0	1:44.257 A-Q1	1:43.561	1:44.257 A-Q1	2:03.733 A-R2	2:06.301 A-R2	+7.310 A-R2	124.9 A-Q1	40.906 A-Q2	36.277 A-Q1	26.378 A-Q2
44	Chevrolet Camaro Z-28 (2002)	Phillip Waters	AS	177	1:44.301 C-Q1	1:44.301	1:44.301 C-Q1	2:00.265 C-R1	2:08.610 C-R1	+11.503 C-R1	130.0 C-Q1	42.124 C-Q1	35.315 C-Q1	26.862 C-Q1
45	BMW 325 i	Matthew Fritz	EP	14	1:44.365 D-R1	1:43.355	1:44.651 D-Q2	1:44.365 D-R1	1:44.945 D-R1	+1.199 D-R1	124.5 D-R1	40.272 D-R1	36.758 D-R1	26.325 D-R1
46	Mazda MX-5	Riley Salyer	EP	44	1:45.352 D-Q2	1:45.352	1:45.352 D-Q2	1:49.255 D-R2	1:50.231 D-R2	+2.315 D-R2	108.7 D-R1	39.649 D-Q2	38.611 D-Q2	27.092 D-Q2
47	Swift DB-3 (1989)	Dan Carney >115%	FF	44	1:46.121 C-R2	1:45.502	1:52.195 C-Q1	1:46.121 C-R2	1:47.375 C-R2	+2.695 C-R2	114.0 C-R1	41.271 C-R2	36.720 C-R2	27.511 C-R1
48	Mazda FC Rx7 (1989)	John Bell	EP	162	1:47.624 C-Q1	1:47.213	1:47.624 C-Q1	1:49.368 C-R2	1:50.426 C-R2	+1.521 C-R2	113.9 C-Q1	42.828 C-Q1	36.727 C-Q1	27.658 C-Q1

About this data

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. The columns are about the car: its best lap, the lap its best sectors add up to, its sector times and trap speed. "Driver metrics" adds two about the driver: the best 5-lap stint (mean of the quickest five consecutive race laps) and consistency (how far the median race lap sat behind the best in that race; small is a driver who does it every lap), both 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.

By car

Car	Class	Drivers	Lap	Qual	Race	Trap	S1	S2	S3
Piper DF05	FF	1	1:31.000Porter Aiken	1:31.000Porter Aiken	1:40.805Porter Aiken	130.3Porter Aiken	34.534Porter Aiken	33.016Porter Aiken	23.450Porter Aiken
Swift DB6	FF	1	1:31.242John Robinson II	1:32.097John Robinson II	1:31.242John Robinson II	134.3John Robinson II	34.930John Robinson II	32.498John Robinson II	23.467John Robinson II
Mygale SJ13	FF	2	1:31.374Sebastian Mateo Naranjo	1:31.374Sebastian Mateo Naranjo	1:40.563Sebastian Mateo Naranjo	129.7Sebastian Mateo Naranjo	34.878Sebastian Mateo Naranjo	33.066Sebastian Mateo Naranjo	23.399Sebastian Mateo Naranjo
Mygale SJ13	FF	1	1:31.374Sebastian Mateo Naranjo	1:31.374Sebastian Mateo Naranjo	1:40.563Sebastian Mateo Naranjo	129.7Sebastian Mateo Naranjo	34.878Sebastian Mateo Naranjo	33.066Sebastian Mateo Naranjo	23.399Sebastian Mateo Naranjo
Mygale Mygale SJ13	FF	1	1:35.276Ken Bouquillon	1:35.276Ken Bouquillon	1:51.729Ken Bouquillon	127.3Ken Bouquillon	36.828Ken Bouquillon	33.810Ken Bouquillon	24.464Ken Bouquillon
Mygale GR	FF	2	1:31.621Ely Navarro	1:31.621Ely Navarro	1:35.211Michael Dowden	128.8Ely Navarro	34.676Ely Navarro	33.300Ely Navarro	23.573Ely Navarro
Mygale GR	FF	1	1:31.621Ely Navarro	1:31.621Ely Navarro	1:40.256Ely Navarro	128.8Ely Navarro	34.676Ely Navarro	33.300Ely Navarro	23.573Ely Navarro
Mygale GR (2011)	FF	1	1:34.904Michael Dowden	1:34.904Michael Dowden	1:35.211Michael Dowden	116.8Michael Dowden	36.056Michael Dowden	34.048Michael Dowden	24.275Michael Dowden
Mygale F1600	FF	5	1:31.691David Ybarra	1:32.437David Ybarra	1:31.691David Ybarra	129.1Karsten Defonce	34.633David Ybarra	33.438David Ybarra	23.620David Ybarra
Mygale F1600	FF	3	1:31.691David Ybarra	1:32.437David Ybarra	1:31.691David Ybarra	127.3Axel Leroy	34.633David Ybarra	33.438David Ybarra	23.620David Ybarra
Mygale f1600	FF	2	1:32.699Dillon Defonce	1:32.699Dillon Defonce	1:43.629Karsten Defonce	129.1Karsten Defonce	34.968Dillon Defonce	33.528Karsten Defonce	23.775Dillon Defonce
Mygale SJ2014	FF	1	1:32.019Sebastian Mateo Naranjo	1:32.019Sebastian Mateo Naranjo	1:32.061Sebastian Mateo Naranjo	119.9Sebastian Mateo Naranjo	34.874Sebastian Mateo Naranjo	33.156Sebastian Mateo Naranjo	23.547Sebastian Mateo Naranjo
Van Dieman F1600	FF	2	1:32.266Trevor Russell	1:32.745Joe Colasacco	1:32.266Trevor Russell	130.5Trevor Russell	34.751Trevor Russell	33.519Trevor Russell	23.568Trevor Russell
Van Dieman F1600	FF	1	1:32.266Trevor Russell	1:34.162Trevor Russell	1:32.266Trevor Russell	130.5Trevor Russell	34.751Trevor Russell	33.519Trevor Russell	23.568Trevor Russell
Van Dieman FF	FF	1	1:32.745Joe Colasacco	1:32.745Joe Colasacco	1:42.720Joe Colasacco	127.8Joe Colasacco	35.026Joe Colasacco	33.632Joe Colasacco	23.650Joe Colasacco
Mygale SJ14\Honda	FF	1	1:32.506Callum Baxter	1:32.506Callum Baxter	1:42.461Callum Baxter	128.2Callum Baxter	34.772Callum Baxter	33.580Callum Baxter	23.891Callum Baxter
Acura Integra	FF	1	1:33.339David H. Livingston Jr	1:33.339David H. Livingston Jr	1:44.261David H. Livingston Jr	128.8David H. Livingston Jr	40.795David H. Livingston Jr	35.894David H. Livingston Jr	23.988David H. Livingston Jr
Piper DL7\Honda	FF	4	1:33.448Antonio Costantino	1:33.999Camryn Reed	1:33.448Antonio Costantino	126.0Camryn Reed	35.684Antonio Costantino	33.551Calum Dunbar	23.904Antonio Costantino
Piper DL7\Honda (2019)	FF	1	1:33.448Antonio Costantino	1:34.562Antonio Costantino	1:33.448Antonio Costantino	119.9Antonio Costantino	35.684Antonio Costantino	33.691Antonio Costantino	23.904Antonio Costantino
Piper DL7	FF	1	1:33.999Camryn Reed	1:33.999Camryn Reed	1:43.704Camryn Reed	126.0Camryn Reed	35.955Camryn Reed	34.037Camryn Reed	24.001Camryn Reed
Piper DL7\Honda (2014)	FF	1	1:34.054Calum Dunbar	1:35.208Calum Dunbar	1:34.054Calum Dunbar	122.0Calum Dunbar	35.895Calum Dunbar	33.551Calum Dunbar	24.113Calum Dunbar
Piper DL7\Honda	FF	1	1:36.690Brian Graham	1:36.690Brian Graham	1:53.737Brian Graham	124.2Brian Graham	36.711Brian Graham	34.537Brian Graham	25.057Brian Graham
Van Diemen RF00	FF	1	1:34.065Chris Smith	1:34.065Chris Smith	1:34.330Chris Smith	130.7Chris Smith	35.837Chris Smith	33.160Chris Smith	24.003Chris Smith
Caterham Seven	EP	1	1:34.415Peter Norton	1:35.116Peter Norton	1:34.415Peter Norton	129.1Peter Norton	36.424Peter Norton	33.493Peter Norton	24.188Peter Norton
Citation F1600	FF	1	1:34.549Miles Crabbe	1:34.876Miles Crabbe	1:35.412Miles Crabbe	125.2Miles Crabbe	35.861Miles Crabbe	34.169Miles Crabbe	24.134Miles Crabbe
Ford Mustang GT	AS	4	1:34.642Michael Kamalian	1:35.467Thomas J Ellis	1:34.642Michael Kamalian	140.9Michael Kamalian	37.067Michael Kamalian	32.639Thomas J Ellis	24.028Michael Kamalian
Ford Mustang	AS	1	1:34.642Michael Kamalian	1:36.558Michael Kamalian	1:34.642Michael Kamalian	140.9Michael Kamalian	37.067Michael Kamalian	33.474Michael Kamalian	24.028Michael Kamalian
Ford Mustang (2003)	AS	1	1:35.351Thomas J Ellis	1:35.467Thomas J Ellis	1:35.351Thomas J Ellis	138.3Thomas J Ellis	37.678Thomas J Ellis	32.639Thomas J Ellis	24.384Thomas J Ellis
Ford Mustang (2006)	AS	1	1:35.692Gregory Eaton	1:36.767Gregory Eaton	1:35.692Gregory Eaton	132.5Gregory Eaton	37.336Gregory Eaton	33.408Gregory Eaton	24.551Gregory Eaton
Ford Mustang GT (2008)	AS	1	1:36.389James Jost	1:38.195James Jost	1:36.389James Jost	138.6James Jost	38.069James Jost	32.794James Jost	24.669James Jost
Piper DF-5	FF	1	1:34.842Michael Bulzacchelli	1:34.842Michael Bulzacchelli	1:42.266Michael Bulzacchelli	126.2Michael Bulzacchelli	36.075Michael Bulzacchelli	34.370Michael Bulzacchelli	24.204Michael Bulzacchelli
Van Diemen RF02	FF	1	1:35.150Kevin Brumbaugh	1:36.770Kevin Brumbaugh	1:35.150Kevin Brumbaugh	129.5Kevin Brumbaugh	36.763Kevin Brumbaugh	33.720Kevin Brumbaugh	24.546Kevin Brumbaugh
Mygale SJ14H	FF	1	1:35.262Robert Albani	1:35.262Robert Albani	1:36.359Robert Albani	135.6Robert Albani	33.334Robert Albani	36.843Robert Albani	24.217Robert Albani
BMW Z3	EP	3	1:35.300Tyler Ladd	1:35.300Tyler Ladd	1:35.659Tyler Ladd	132.3Doug Piner	36.908Tyler Ladd	33.687Tyler Ladd	24.399Tyler Ladd
BMW Z3 (1999)	EP	2	1:35.300Tyler Ladd	1:35.300Tyler Ladd	1:35.659Tyler Ladd	132.3Doug Piner	36.908Tyler Ladd	33.687Tyler Ladd	24.399Tyler Ladd
BMW Z3	EP	1	1:43.056Don Tucker	1:43.056Don Tucker	1:53.452Don Tucker	124.5Don Tucker	39.963Don Tucker	35.835Don Tucker	26.424Don Tucker
Mazda MX-5	EP	2	1:36.760Tony Ave	1:36.760Tony Ave	1:44.140Tony Ave	123.8Tony Ave	36.889Tony Ave	34.788Tony Ave	24.615Tony Ave
Spectrum 014H	FF	1	1:37.862Sam Lockwood	1:37.862Sam Lockwood	1:38.186Sam Lockwood	122.9Sam Lockwood	37.748Sam Lockwood	34.842Sam Lockwood	24.845Sam Lockwood
BMW 328is	EP	1	1:38.553Bill Miller	1:40.619Bill Miller	1:38.553Bill Miller	129.0Bill Miller	38.663Bill Miller	34.089Bill Miller	25.374Bill Miller
BMW 325M-Technic	EP	1	1:38.814David Spillman	1:41.100David Spillman	1:38.814David Spillman	136.0David Spillman	39.364David Spillman	34.359David Spillman	25.071David Spillman
Alfa Romeo Spider	EP	1	1:39.735John Baucom	1:40.731John Baucom	1:39.735John Baucom	120.4John Baucom	38.674John Baucom	35.484John Baucom	25.256John Baucom
Mazda RX-7	EP	4	1:40.833Sean Saggese	1:41.750Sean Saggese	1:40.833Sean Saggese	120.1Sean Saggese	38.946Sean Saggese	35.692Sean Saggese	25.692Sean Saggese
Mazda RX-7 (1986)	EP	2	1:40.833Sean Saggese	1:41.750Sean Saggese	1:40.833Sean Saggese	120.1Sean Saggese	38.946Sean Saggese	35.692Sean Saggese	25.692Sean Saggese
Mazda RX-7 Roadster	EP	1	1:43.939Michael Cooke	1:43.939Michael Cooke	1:49.636Michael Cooke	117.2Michael Cooke	39.882Michael Cooke	37.142Michael Cooke	26.609Michael Cooke
Mazda FC Rx7 (1989)	EP	1	1:47.624John Bell	1:47.624John Bell	1:49.368John Bell	113.9John Bell	42.828John Bell	36.727John Bell	27.658John Bell
Mazda Miata	EP	1	1:41.011Don Tucker	1:41.023Don Tucker	1:41.011Don Tucker	124.7Don Tucker	39.189Don Tucker	35.131Don Tucker	25.398Don Tucker
Mazda RX-8	EP	1	1:44.257Thomas Burt	1:44.257Thomas Burt	2:03.733Thomas Burt	124.9Thomas Burt	40.906Thomas Burt	36.277Thomas Burt	26.378Thomas Burt
Chevrolet Camaro Z-28	AS	1	1:44.301Phillip Waters	1:44.301Phillip Waters	2:00.265Phillip Waters	130.0Phillip Waters	42.124Phillip Waters	35.315Phillip Waters	26.862Phillip Waters
BMW 325 i	EP	1	1:44.365Matthew Fritz	1:44.651Matthew Fritz	1:44.365Matthew Fritz	124.5Matthew Fritz	40.272Matthew Fritz	36.758Matthew Fritz	26.325Matthew Fritz
Swift DB-3	FF	1	1:46.121Dan Carney	1:52.195Dan Carney	1:46.121Dan Carney	114.0Dan Carney	41.271Dan Carney	36.720Dan Carney	27.511Dan Carney

About this data

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

Super Tour Mar 2023 → Super Tour Mar 2024 2023-03-10 to 2024-03-08

2023-04-01 EP Investigate Parity of Z3

#33343 from Tim Schreyer · Rule change · TB 23-01 (2023-01 Fastrack)

Effective 4/1/2023 In EP Spec Line BMW Z3 2.5L, change Notes as follows:
"58 56mm Flat Plate Intake Restrictor is required with both stock or alternate throttle body."

2023-05-01 SRF Update SRF Front W2 Rain Tire Part Number

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

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

2023-06-01 EP 914-6 Valve Size Correction

#34185 from Kip VanSteenburg · Rule change · TB 23-06 (2023-05 Fastrack)

In EP Spec Lines, Porsche 914 - 6 2.0L, change Valves IN & EX mm/(in.) as follows:
"(I) 4~~1.9~~ 2.0/(1.65)
(E) 38.1 0/(1.50)"

2023-06-01 SRF Hoosier SRF Wet Front Tire Rule Update

#34189 from Robey Clark · Rule change · TB 23-06 (2023-06 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."

2023-07-01 EP Correct Intake Valve Size on 1500cc Midget/Spitfire

#34419 from Production Committee · Rule change · TB 23-06 (2023-05 Fastrack)

In FP Spec Lines, Austin-Healey Sprite Mk. I, II,III, IV MG Midget Mk I,II, III, IV & 1500, change Intake Valve Size as follows:
"(I) 36.6~~5.3~~/(1.44)"
In FP Spec Lines, Triumph Spitfire Mk. IV & 1500, change Intake Valve Size as follows:
"(I) 36.6~~5.5~~/(1.440)"
In HP Spec Lines, Triumph Spitfire 1500, change Intake Valve Size as follows:
"(I) 36.6~~5.5~~/(1.440)"
In HP Spec Lines, Triumph Spitfire Mk. III & IV 1500, change Intake Valve Size as follows:
"(I) 36.6~~5.5~~/(1.440)"

2023-08-01 AS Crate Motor Part Numbers

#32944 from Sam Daniels · Rule change · TB 23-08 (2023-08 Fastrack)

In AS, GCR Section 9.1.6.F.2., change as follows:
"GM Performance parts CT400 P/N-1937 → 0604 or 1937 → 0604 engine assembly for GM produced vehicles."

2023-08-01 AS Request wheel size change

#33007 from Michael Kamalian · Rule change · TB 23-08 (2023-08 Fastrack)

In AS Spec Lines, Ford Mustang GT 5.0l (15-17) Restricted Preparation, change Notes as follows:
"Max. Wheel Size: Dia.~~18.0~~ 19.0 inches."

Applies to Ford Mustang GT on this page: Michael Kamalian

2023-08-01 AS Alternative Upper Front Control Arms for Dodge Challenger

#33352 from Clark Cambern · Rule change · TB 23-08 (2023-08 Fastrack)

In AS SPEC Lines, Dodge Challenger (08-20) Restricted Preparation 5.7L, 6.1L, or 6.4L V8 (Iron block, Aluminum heads), 2
valves/cylinder, change Notes as follows:
"~~SPC-66045~~ Alternate front upper control arms are permitted."

2023-08-01 AS Front Brake Caliper Adapters for Dodge Challenger

#33353 from Clark Cambern · Rule change · TB 23-08 (2023-08 Fastrack)

In AS SPEC Lines, Dodge Challenger (08-20) Restricted Preparation 5.7L, 6.1L, or 6.4L V8 (Iron block, Aluminum heads), 2
valves/cylinder, change Notes as follows:
"Stock brakes or alternate Dodge brakes (Part numbers: front caliper (0517 → 5106 (R) and 0517 → 5107 (L); rear caliper (R1542564 (R)
and R1542565 (L))) may be used with the brake rotor sizes listed in this specification line. Alternate brackets may be used to
facilitate updated/backdated components."

2023-09-01 EP Hub Note Clean Up In EP TR8 Spec Line

#34649 from Jeff young · Rule change · TB 23-09 (2023-09 Fastrack)

In the EP Spec Lines, Triumph TR8 (78-81), remove the following wording from Notes:
"~~Alternate front hubs are allowed provided they are of the same external dimensions as stock and weigh no less than the stock~~
~~hubs.~~"

2023-09-01 EP Triumph GT6 Adjustments

#34662 from ANTHONY PARKER · Rule change · TB 23-09 (2023-09 Fastrack)

In EP Spec Lines, Triumph GT6, change Carburetor. No. & Type as follows:
"(2) 1.5” ~~SU or Stromberg~~ Auto-type carburetor(s)"

2023-09-01 EP Triumph GT6 Adjustments: Brakes

#34663 from ANTHONY PARKER · Rule change · TB 23-09 (2023-09 Fastrack)

In EP Spec Lines, Triumph GT6, add the following to Brakes Alt.: mm/(in.):
"(F) Calipers & discs from TR-6 (std. or alt)"

2023-10-01 SRF SRF Radiator Rule Update

#34805 from Robey Clark · Rule change · TB 23-10 (2023-10 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 j~~ustified 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."

2023-12-01 EP Porsche 944/924S Rule Change Request

#35002 from Adam Achepohl · Rule change · TB 23-12 (2023-12 Fastrack)

In EP Spec Lines, delete the Porsche 944/924S 2.5L (2V) (83-88) spec line entirely, and create a new spec line for Porsche
944/924S 2.5L(2V) 2.7L(2V) (83-89) as follows:

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

2023-12-01 EP Triumph GT6 Adjustments

#35054 from ANTHONY PARKER · Rule change · TB 23-12 (2023-12 Fastrack)

In EP Spec Lines, Triumph GT6, change weight as follows:
"~~1830~~ 1800"

2024-01-01 SRF Update SRF Rain / Brake Rule

#34706 from Robey Clark · Rule change · TB 23-09 (2023-09 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."

2024-01-01 SRF Update SRF Brake Light Rule v1

#34853 from Robey Clark · Rule change · TB 23-10 (2023-10 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."

2024-01-01 EP Request to Review Z3 2.5 Spec Line

#35073 from Tim Schreyer · Rule change · TB 24-01 (2024-01 Fastrack)

In EP spec line, BMW Z3 2.5L, change weight as follows:
"~~2450~~ 2500
*~~2511~~ 2563
**~~2573~~ 2625"

Applies to BMW Z3 on this page: Tyler Ladd, Doug Piner, Don Tucker

2024-01-01 EP Miata Alternate Head

#35253 from Don Tucker · Rule change · TB 24-01 (2024-01 Fastrack)

In EP Spec Lines, Mazda MX-5 /Miata 1.8L (90-97), change weight as follows:
"~~2200~~ 2150"
Mazda MX-5 /Miata (94-97)
"~~2035~~ 2000
*~~2086~~ 2050
**~~2137~~ 2100"

2024-01-01 EP Triumph GT6 Adjustments

#35255 from Anthony Parker · Rule change · TB 24-01 (2024-01 Fastrack)

In EP spec line, Triumph GT6, make the following change in the Notes section:
"Two (2) 1.75” auto-type carburetors @ 1970 40 lbs. Three (3) Weber 40 DCOE on IR manifold with 28mm chokes @ 1990
lbs. Laycock overdrive, May use 5 speed gearbox w/o overdrive. ~~Three (3) Weber 40mm DCOE w/28mm venturi on individual~~
~~runner manifold @ 2020 lb.~~"

2024-01-01 SRF SRF / SRF3 Rule Updates

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

Show 23 more lines

"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.

2024-01-01 EP Honda S2000 throttle body

#35272 from Aaron Johnson · Rule change · TB 24-01 (2024-01 Fastrack)

In EP spec line, Honda S2000, make the following changes to its spec line:
Fuel Injected Equipped Throttle Body Inside Diameter: "62 64"
Notes: "Comp. Ratio limited to 12.0:1. Valve lift limited to .500”. An adaptor plate can be used to mount the 62mm throttle body
from '00-05 to the '06-09 intake manifold. The adaptor plate can be no more than 1.25" thick, and its bore must not exceed the
"Fuel Injected Equipped Throttle Body Inside Diameter" maximum spec of 64mm."

2024-01-01 FF Honda Fit Oversize Piston Rings

#35305 from Doug Learned · Rule change · TB 24-01 (2024-01 Fastrack)

In FF, GCR section 9.1.1.B.14.e.3.a, add the following:
"The standard ring pack, PN 13011-RB1-004 (Riken) or 13011-RB1-006 (Nippon), or the oversize ring pack, PN 13021-RB7-Z01
(Riken), or 13021-RB7-Z02 (Nippon), or FF800-100 (Fast Forward), may be used."

2024-01-01 EP Correction within Triumph TR8 Spec Line

#35315 from Production Committee · Rule change · TB 24-01 (2024-01 Fastrack)

In EP spec line, Triumph TR8 (78-81), move the "Dry sump allowed" wording to the appropriate location as follows:
Carburetor. No. & Type: “Zenith Stromberg carbs or fuel injection. ~~Dry sump is allowed.~~”
Notes: “Comp. Ratio limited to 12.0:1, Valve lift limited to .500”. Dry sump is allowed.”

2024-01-01 EP Correction to EP 924S/944 Spec Line

#35317 from Production Committee · Rule change · TB 24-01 (2024-01 Fastrack)

In EP spec line, Porsche 944/924S 2.5L (2V) / 2.7L (2V) (83-89), change Weight as follows:

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

2024-02-01 EP Update 1988-1991 Civic to Match 1988-1991 CRX

#35399 from Enrik Benazic · Rule change · TB 24-02 (2024-01 Fastrack)

In HP, make the following weight change:
Honda Civic 1.5 (88-91)
~~“2245~~ 2175
*~~2301~~ 2229
**~~2357~~ 2284”

2024-03-01 AS Request to Classify 1970-1981 Camaro and Firebird in AS

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

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.

2024-03-01 AS Fuel Cell 12

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

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

Show 22 more lines

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.”

2024-03-01 AS Please Classify the 6th Gen Into AS.

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

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:

Show 4 more lines

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

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

2024-03-01 EP GCR Correction - Redundant HP Spec Lines

#35623 from Production Committee · Rule change · TB 24-03 (2024-03 Fastrack)

In HP Spec Lines, delete the following redundant spec lines in their entirety:
Spec line #10 - VW Rabbit Cabriolet 1780
Spec line #3 - VW Scirocco 1588
Spec line #4 - VW Scirocco 1780 (8-valve) (83-88)
Spec line #5 - VW Scirocco 1588

2024-03-01 AS spec lines

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

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 GT on this page: Michael Kamalian, Gregory Eaton, James Jost

Super Tour Mar 2024 → Super Tour Mar 2025 2024-03-08 to 2025-03-07

2024-04-01 AS Restricted Prep Aftermarket Parts Request

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

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."

Applies to Chevrolet Camaro Z-28 on this page: Phillip Waters

2024-04-01 AS Allowance of 11

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

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 GT on this page: Michael Kamalian

2024-05-01 AS 6th gen Camaro limited prep

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

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.

2024-05-01 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)

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.

2024-05-01 AS Full Prep Head

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

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 Chevrolet Camaro Z-28 on this page: Phillip Waters

Applies to Ford Mustang GT on this page: Michael Kamalian, Thomas J Ellis, Gregory Eaton, James Jost

2024-06-01 AS Request for Classification of 2018-2023 mustang In

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

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.

2024-06-01 EP NIssan 300ZX Z31 to EP

#35830 from Murphy Nichols · Rule change · TB 24-06 (2024-06 Fastrack)

In EP Spec Lines, classify Nissan 300ZX (84-89), as follows:

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

2024-06-01 EP RX7 1993 and Up Request In EP Spec Lines, classify

#36031 from Edward Zabinski · Rule change · TB 24-06 (2024-06 Fastrack)

Mazda RX-7 (92-97) as follows:

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

2024-06-01 EP Clean-up Multiple EP RX-8 Spec Lines In EP

#36156 from Production Committee · Rule change · TB 24-06 (2024-06 Fastrack)

Spec Lines, make the following changes to the two Mazda RX-8 spec lines.
Remove spec line entirely:
~~Mazda RX-8 (04-11)~~
Remove the wording "alternate":
Mazda RX-8 (04-11)~~(alternate)~~
Spec Mazda (SM/SMX) None.

2024-08-01 EP Errant entry in HP production line item

#36231 from Angus Crome · Rule change · TB 24-08 (2024-08 Fastrack)

In HP Spec Lines, change Track (F/R)mm/(in.) as follows:
Volkswagen Golf (GTI, GT, GL) (85-92): "2 1537/1529 (60.5/60.2)"
Volkswagen Jetta (GLI, GL) (85-92): "2 1537/1529 (60.5/60.2)"

2024-08-01 SRF Update Rain Tire Rule and Hoosier Decal Placement

#36436 from Robey Clark · Rule change · TB 24-08 (2024-08 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."

2024-09-01 SRF Protest Fee Clarification

#36540 from SCCA Staff · Rule change · TB 24-09 (2024-09 Fastrack)

In FE, GCR section 9.1.1.I.2.U.b.3, change as follows:
"Protest Fee: ~~Regional -$25.00, National -$50.00.~~ See GCR section 8.3.1.D for fees and payment procedure."
In SRF, GCR section 9.1.8.D.1.U.b.3, change as follows:
"Protest Fee: ~~Regional -$25.00, National -$50.00.~~ See GCR section 8.3.1.D for fees and payment procedure. Item 1 will be done by
the CSR or other shop that is equipped for this type of work and will be paid directly."

2024-09-01 SRF Update to Letter 36619 with new Hoosier Contingency Decal Info

#36624 from Robey Clark · Rule change · TB 24-09 (2024-09 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."

2024-09-01 AS Mustang transmission ratios

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

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 GT on this page: Michael Kamalian, Gregory Eaton, James Jost

2024-10-01 FF Update to FF EGR Blanking Plate Rule

#36633 from Matt Boian · Rule change · TB 24-10 (2024-10 Fastrack)

In FF, GCR section 9.1.1.B.14.r.1, change as follows:
"All emission control devices must be removed and blocked off by the blanking plate provided by HPD or Fast Forward as noted
below, except for the VTEC activation valve. The VTEC activation valve must be retained; and it must be functioning. No
modifications are permitted.
a. EGR Plate: Fast Forward PN: FF200-301.
b. EGR Port Cover: Fast Forward PN: FF200-302."

2024-10-01 SRF Update SRF3 Air Filter Rule

#36681 from Robey Clark · Rule change · TB 24-10 (2024-10 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~~"

2024-10-01 SRF Update SRF Brake Rotor Thickness

#36687 from Robey Clark · Rule change · TB 24-10 (2024-10 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”)."

2024-10-01 SRF Hoosier Tire Decal Placement

#36739 from Robey Clark · Rule change · TB 24-10 (2024-10 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."

2024-11-01 EP 1275 HP Spridget Level 2 Only

#36518 from Darryl Saylor · Rule change · TB 24-09 (2024-09 Fastrack)

In HP Spec Lines, Austin-Healey Sprite MkI, II, III, IV MG Midget (ALL) - Level 2 - 1275cc, change Notes as follows:
"(Effective 11/1/2024) Compression ratio limited to 11 12.0:1"
In HP Spec Lines, Austin-Healey Sprite MkI, II, III, IV MG Midget (ALL) - Level 2 - 1098cc, change Notes as follows:
"(Effective 11/1/2024) Compression ratio limited to 11 12.0:1"

2024-11-01 FF Change FF/FC Weight with Sequential Gearbox

#36651 from Robert Wright · Rule change · TB 24-11 (2024-11 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."

2024-11-01 EP NA Miata Track Width Correction

#36902 from Production Committee · Rule change · TB 24-11 (2024-11 Fastrack)

In EP Spec Lines, Track (F/R) mm/(in.), change as follows:
Mazda MX-5 /Miata 1.6L (-1993) - ~~"1478/1491 (58.2/58.7)~~ 1516/1534 (59.7/60.4)"
Mazda MX-5 /Miata 1.8L (90-97) - ~~"1483/1509 (58.4/59.4)~~ 1516/1534 (59.7/60.4)"
Mazda MX-5 /Miata (94-97) - "~~1483/1509 (58.4/59.4)~~ 1516/1534 (59.7/60.4)"

2024-11-01 FF Alternative Oversize Honda Fit Pistons

#37064 from Formula/Sports Racing Committee · Rule change · TB 24-11 (2024-11 Fastrack)

In FF, GCR section 9.1.1.B.14.e.1, change as follows:
"Honda Fit OEM standard size pistons, PN: 13010-RB1-000, or Honda Fit OEM 0.25mm oversize pistons, PN: 13020-RB7-Z00, or
Fast Forward 0.25mm oversize pistons, PN: FF800-110, may be used."
In GCR section 9.1.1.B.14.e.2, change as follows:
"a. Maximum standard piston diameter, measured at a point 16mm from the bottom of the skirt: 73.240mm
(~~2.8834~~ 2.8835 inches).
b. Centerline of wrist pin to crown maximum: 26.21mm (1.032 inches).
c. Maximum overall height from skirt to crown edge: 47.80mm (1.882 inches).

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d. Minimum weight: 198.0 grams (6.984 ounces).
e. Minimum weight of piston pin: 66 grams (2.25 ounces).
f. Combined minimum weight of piston, piston pin and connecting rod: 543.5 grams (18.85 ounces).
g. Combined minimum weight of piston, wrist pin, and circlips: 267 grams (9.418 ounces).
h. Centerline of wrist pin to crown edge: 26.289mm (1.035 inches).
i. Ring groove widths:
Top ring groove: 1.003mm (0.0395 inches).
Middle ring groove: 1.016mm (0.0400 inches).
Oil ring groove: 1.981mm (0.0780 inches).
j. Ring groove distance from wrist pin center to bottom of groove:
Top ring groove: 19.63mm (0.7730 inches).
Middle ring groove: 15.29mm (0.6020 inches).
Oil ring groove: 10.91mm (0.4295 inches)."

2024-12-01 EP Triumph GT6 Adjustments

#37112 from Anthony Parker · Rule change · TB 24-12 (2024-12 Fastrack)

In EP Spec Lines, make the following changes in the "Triumph GT6" spec line:
Carburetor No. & Type: (2): "~~1.5”~~ 1.75" Auto-type carburetor(s)"
Notes: "~~Two (2) 1.75” auto-type carburetors @ 1940 lbs.~~ Three (3) Weber 40 DCOE on IR manifold with 28mm chokes @ 1990
lbs. Laycock overdrive, May use 5 speed gearbox w/o overdrive."

2025-01-01 AS Increase Coyote Engine Restrictor to 80mm

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

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"

2025-01-01 AS Performance Pack for 2015+ Mustang

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

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 GT on this page: Michael Kamalian, Gregory Eaton, James Jost

2025-01-01 EP Request to Reduce Weight of BMW 325i/is E30 (84-91) Spec Line

#37119 from Tim Schreyer · Rule change · TB 25-01 (2025-01 Fastrack)

In EP SPEC LINES, BMW 325i/is (E30) (84-91), change Weight as follows:
"~~2200~~ 2150
*~~2255~~ 2204
**~~2310~~ 2258"

Applies to BMW 325 i on this page: Matthew Fritz

2025-01-01 AS Gear Ratios

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

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"

2025-01-01 AS ECU specs for LS engine

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

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."

Applies to Chevrolet Camaro Z-28 on this page: Phillip Waters

2025-02-21 EP Effective date for Jan 2025 GCR updates

#37654 from Doug Piner · Rule change · TB 25-02 (2025-02 Fastrack)

In EP Spec Lines, add to Notes as follows:
BMW Z3 2.5LL "(Effective 2/21/2025) 52mm Flat Plate Intake Restrictor is required."
BMW Z3 2.8L (97-00): "(Effective 2/21/2025) 55mm Flat Plate Intake Restrictor is required."
BMW 328i/is E36 (96-99): "(Effective 2/21/2025) 58mm Flat Plate Intake Restrictor is required."
BMW 328i/ci E46 (01-06): "(Effective 2/21/2025) 58mm Flat Plate Intake Restrictor is required."
BMW 325i/is E46 (01-06): "(Effective 2/21/2025) 56mm Flat Plate Intake Restrictor is required."
BMW 325i/is E-36 (92-95): "(Effective 2/21/2025) 56mm Flat Plate Intake Restrictor is required."
BMW 325is M-Technic (1994): "(Effective 2/21/2025) 56mm Flat Plate Intake Restrictor is required."

2025-03-01 EP Request Competition Adjustment to BMW Z3 2.5L

#37120 from Tim Schreyer · Rule change · TB 25-01 (2025-01 Fastrack)

In EP Spec Lines, change Notes as follows:
BMW Z3 2.5LL "(Effective 3/1/2025) ~~56mm~~ 52mm Flat Plate Intake Restrictor is required."
BMW Z3 2.8L (97-00): "(Effective 3/1/2025) ~~59mm~~ 55mm Flat Plate Intake Restrictor is required."
BMW 328i/is E36 (96-99): "(Effective 3/1/2025) ~~62mm~~ 58mm Flat Plate Intake Restrictor is required."
BMW 328i/ci E46 (01-06): "(Effective 3/1/2025) ~~62mm~~ 58mm Flat Plate Intake Restrictor is required."
BMW 325i/is E46 (01-06): "(Effective 3/1/2025) ~~60mm~~ 56mm Flat Plate Intake Restrictor is required."
BMW 325i/is E-36 (92-95): "(Effective 3/1/2025) ~~60mm~~ 56mm Flat Plate Intake Restrictor is required."
BMW 325is M-Technic (1994): "(Effective 3/1/2025) ~~60mm~~ 56mm Flat Plate Intake Restrictor is required."

2025-03-01 EP Interpretation of Production Rules on Mirrors

#37235 from Lawrence Slivinski · Rule change · TB 25-03 (2025-03 Fastrack)

In GCR, add new rule as Section 9.1.5.E.10.f:
"Any interior or exterior mirror(s) that meets rule 9.3.36 may be used."

2025-03-01 EP Weight Reduction for Honda S2000

#37466 from Michael Unger · Rule change · TB 25-03 (2025-03 Fastrack)

In EP, Spec Lines make the following weight changes:

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

2025-03-01 EP Mazda 1999 Miata 1.8L

#37488 from Joe Carr · Rule change · TB 25-03 (2025-03 Fastrack)

In EP Spec Lines, make the following weight change:
Mazda MX-5 /Miata (99-05):
"~~2150~~ 2100
*~~2204~~ 2153
**~~2258~~ 2205"

2025-03-01 FF Formula F Proposal to Invite Older Cars Via a Tire Rule Change

#37802 from Anthony Stefanelli · Rule change · TB 25-03 (2025-03 Fastrack)

In FF, GCR section 9.1.1.B.10.e, change as follows:
"Formula F shall be limited to the following tires (front tires may not be used as rears):
Dries:
Front - Hoosier R60A Radial 43322 or F1600 Radial 43321 185/60R13
Rear - Hoosier R60A Radial 43327 or F1600 Radial 43326 205/60R13
Wets:
Front - Hoosier Wet or W3 Radial 44421 185/60R13
Rear - Hoosier Wet or W3 Radial 44426 205/60R13

Show 12 more lines

Alternatively, Formula F cars with rocker arm suspension (e.g., Swift DB1, 1987-90 Reynard) and/or outboard suspension on at
least one chassis end may use the following tires:
Dries:
Front - Hoosier H43130 R60A 20.0 x 6.0-13 or H43164 R60A 20.5 x 7.0-13 bias ply slick
Rear – Hoosier H43307 R60A 22.5 x 7.2-13 bias ply slick
Wets:
Radial wets listed above
or
Front - Hoosier 44165 135/545-13 VFF
Rear - Hoosier 44170 165/580-13 VFF
Front tires may not be used as rears, and tires may not be mixed, i.e., radial tires may not be mixed with bias ply slick tires, bias
ply slick tires may not be mixed with VFF tires, and radial tires may not be mixed with VFF tires."

2025-03-01 AS Race memo

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

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.~~"

Super Tour Mar 2025 → Super Tour Mar 2026 2025-03-07 to 2026-03-06

2025-04-01 AS Flotek Head Plunge Cut Inconsistencies

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

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

2025-04-01 AS Notes clean up

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

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~~

Show 88 more lines

~~#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."

2025-04-01 EP Request for Classification of Chevrolet Spark

#37755 from Kristian Smith · Rule change · TB 25-04 (2025-04 Fastrack)

In HP Spec Lines, classify the Chevrolet Spark (16-22):

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

2025-04-01 EP Request to Lower Ford Festiva Minimum Weight to 1600 LBS

#37939 from Doug DeRonne · Rule change · TB 25-04 (2025-04 Fastrack)

In HP Spec Lines "Ford Festiva (88-93)" change as follows:
Weight:
"~~1700~~ 1600
*~~1743~~ 1640
**~~1785~~ 1680"
Notes:
"Compression ratio limited to ~~10.5~~ 11.0:1. Valve lift limited to .450”."

2025-04-01 SRF Driver Safety & Comfort

#37966 from Robey Clark · Rule change · TB 25-04 (2025-04 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."

2025-04-01 SRF Update SADEV transmission specs

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

2025-05-01 AS Errors and Omission

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

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

2025-05-01 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)

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

2025-05-01 FF Page 228, FF tire rule 9.1.1.10.e

#38251 from Anthony Stefanelli · Rule change · TB 25-05 (2025-05 Fastrack)

In FF, GCR section 9.1.1.B.10.e, change as follows:
"Formula F shall be limited to the following tires ~~(front tires may not be used as rears)~~:
Dries:
Front - Hoosier R60A Radial 43322 or F1600 Radial 43321 185/60R13
Rear - Hoosier R60A Radial 43327 or F1600 Radial 43326 205/60R13
Wets:
Front - Hoosier Wet or W3 Radial 44421 185/60R13
Rear - Hoosier Wet or W3 Radial 44426 205/60R13

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Alternatively, Formula F cars with rocker arm suspension (e.g., Swift DB1, 1987-90 Reynard) and/or outboard suspension on at
least one chassis end may use the following tires:
Dries:
Front - Hoosier H43130 R60A 20.0 x 6.0-13 or H43164 R60A 20.5 x 7.0-13 bias ply slick
or
Hoosier 44165 135/545-13 VFF
Rear – Hoosier H43307 R60A 22.5 x 7.2-13 bias ply slick
or
Hoosier 44170 165/580-13 VFF
Wets:
Radial wets or VFF tires listed above
or
~~Front - Hoosier 44165 135/545-13 VFF~~
~~Rear - Hoosier 44170 165/580-13 VFF~~
Front tires may not be used as rears, and tires may not be mixed, i.e., radial tires may not be mixed with bias ply slick tires, bias
ply slick tires may not be mixed with VFF tires, and radial tires may not be mixed with VFF tires."

2025-06-01 AS Errors and Omissions

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

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 GT on this page: Michael Kamalian, Gregory Eaton, James Jost

2025-06-01 EP Base Weight Adjustment for H-Production X1/9 Spec Lines

#38255 from Matthew Brannon · Rule change · TB 25-06 (2025-06 Fastrack)

In HP Spec Lines, change Weight as follows:
Fiat X-1/9 & Bertone1500: “~~1790~~ 1740 *~~1835~~ 1784 **~~1880~~ 1827”
Fiat X-1/9 1300: “~~1650~~ 1600 *~~1691~~ 1640 **~~1733~~ 1680”
Fiat X-1/9 1300: “~~2060~~ 2010”
Fiat X-1/9 1500: “~~1950~~ 1900”

2025-07-01 AS RE: Previous Letter 37695 Update

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

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

Applies to Ford Mustang GT on this page: Michael Kamalian

2025-07-01 EP BMW Z4 update

#38490 from Bryce McGuire · Rule change · TB 25-07 (2025-07 Fastrack)

In EP Spec Lines, BMW Z4 (03-05), add to Notes the following:
“52mm Flat Plate Intake Restrictor.”

2025-07-01 EP EP Fiat 124 Spider Competition Adjustment Request

#38498 from John Baucom · Rule change · TB 25-07 (2025-07 Fastrack)

In EP Spec Lines, Fiat 124 Sport Spider 1600 & 124 Spider 2000, change as follows:
Weight: "~~2050~~ 2000"
Carburetor No. & Type: "(2) Weber 40 IDF-40IFI, (2) Solex C40P116, 34 36mm choke(s) req’d, (2) Weber 45DCOE w/ 34 36 mm
choke(s) on I.R. manifold or fuel injection."

2025-10-01 SRF Add HD Oil Cooler

#38979 from Robey Clark · Rule change · TB 25-10 (2025-10 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.~~"

2025-10-01 EP HP Plymouth Arrow spec omission

#38995 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

In HP Spec Lines, Plymouth Arrow (76-80), add the following wording to Trans. Speeds(max):
"4 or 5"

2025-10-01 EP Add Wheel Diameter to Appendix G

#39008 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

In Appendix G.2.3, change as follows:
"Rim width and diameter are is absolute maximums."

2025-10-01 EP Add TB ID tolerance to general Prod rules

#39009 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

In GCR, Section 9.1.5.E., change as follows:
9.1.5.E.1.b.4: "The inside dimensions of the throttle body casting/housing (as measured at the throttle butterfly) must remain
stock (tolerance of +/-.25mm), but the throttle body can otherwise be ported and polished."
9.1.5.E.2.b.4: "The inside dimensions of the throttle body casting/housing and all dimensions of the throttle butterfly must
remain stock (tolerance of +/-.25mm)."

2025-11-01 AS Cadillac CTS-V BOP Weight Change

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

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

2025-11-01 EP Please Lower Weight of 280Z

#38871 from Matthew Miller · Rule change · TB 25-09 (2025-09 Fastrack)

In EP Spec Lines, Nissan 280Z, change Weight (lbs) as follows:
"(Effective 11/1/2025) ~~2560~~ 2400
*~~2624~~ 2460
**~~2688~~ 2520"

2025-11-01 EP Miata Weight Adjustment Follow Up

#38949 from Don Tucker · Rule change · TB 25-10 (2025-10 Fastrack)

In EP Spec Lines, Mazda MX-5 / Miata 1.8L (90-97), Effective 11/1/2025 make the following weight change:
"~~2150~~ 2125"

2025-11-01 EP Weight Break for 1098 Midget / Sprite

#38970 from Kendall Jones · Rule change · TB 25-10 (2025-10 Fastrack)

In HP Spec Lines, Austin-Healey Sprite/Midget 1098cc, Effective 11/1/2025make the following weight change:
"~~1630~~ 1550"

2025-11-01 EP HP Volvo 142 spec omission

#38994 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

In HP Spec Lines, Volvo 142/142E P-1800 Engine, Effective 11/1/2025 add the following wording to Notes:
"Comp. Ratio limited to 12.0:1. Valve lift limited to .425”."

2025-11-01 EP HP Mini DOHC 1.6

#38996 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

In HP Spec Lines, Mini Cooper (07-13) (includes 09-15 convertible and 12-15 Coupe), Effective 11/1/2025 make the following
changes to the Notes:
"Compression ratio limited to 11.0:1, Valve lift limited to ~~.450”~~.390"."

2025-11-01 EP Add to Rabbit description

#39019 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

In FP Spec Lines, make the following spec line correction:
"Volkswagen Rabbit (Includes ~~Convertible~~ Cabriolet)"
In HP Spec Lines, make the following spec line correction:
"Volkswagen Rabbit 1588 (Includes Cabriolet)"
"Volkswagen Rabbit 1715 (Includes Cabriolet)"
"Volkswagen Rabbit 1780 (Includes Cabriolet)"

2025-11-01 EP Clean-up 9.1.5.E.7e

#39025 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

In GCR, Section 9.1.5.E.7., change as follows:
"e. Cars fitted with rear drum brakes, can convert to rear disc brakes without penalty. N~~ote that the “Brakes Std.” and “Brakes~~
~~Alt.” listings on a vehicle’s spec line do not prohibit a car that was fitted with rear drum brakes stock, from converting to rear~~
~~disc brakes under this rule~~. When converting from rear drum brakes to rear disc brakes:
1. Rear brake rotors must be solid and can be no larger in diameter than the largest permitted front brake rotor, as defined on
the vehicle’s spec line.
2. Rear calipers and mounting brackets are unrestricted but must be made of a ferrous or aluminum material. ~~The standard and~~
~~alternate brake listings on a vehicle’s specification line, does not prohibit a car that was fitted with rear drum brakes as stock~~

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~~from converting to rear disc brakes under this rule.~~
3. The “Brakes Std.” and “Brakes Alt.” listings on a vehicle’s spec line do not prohibit a car that was fitted with rear drum brakes
as stock from converting to rear disc brakes under this rule."

2025-11-01 EP Add TB size to Ford Mustang (94-98) Spec Line

#39130 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

In EP Spec Lines, Ford Mustang (94-98) add the following to the Fuel Injected Equipped Throttle Body Inside Diameter column:
"60"

2025-12-01 AS 1994 Mustang Spec Line Request

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

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 GT on this page: Michael Kamalian, Thomas J Ellis

2025-12-01 EP TR2 Notes E&O

#39180 from Anthony Parker · Rule change · TB 25-12 (2025-12 Fastrack)

In EP Spec Lines, Triumph TR2, 3, 3A, 4, 4A, TR4, TR4A, IRS, make the following change to the Notes:
"Front apron assembly may be made of alternate material. ~~Three (3) Weber 40 DCOE on IR manifold with 28mm chokes @ 1990~~
~~lbs.~~ Laycock overdrive, may use 5 speed gearbox without overdrive."

2025-12-01 EP Balance of Power

#39187 from Jim Simaras · Rule change · TB 25-12 (2025-12 Fastrack)

In EP Spec Lines, make the following changes to Restrictors:
BMW Z3 2.5L: "~~52mm~~ 50mm Flat Plate Intake Restrictor"
BMW Z3 2.8L (97-00): "~~55mm~~ 53mm Flat Plate Intake Restrictor"
BMW 328i/is E36 (96-99): "~~58mm~~ 55mm Flat Plate Intake Restrictor"
BMW 328i/ci E46 (01-06): "~~58mm~~ 55mm Flat Plate Intake Restrictor"
BMW 325i/is (E46) (01-06): "~~56mm~~ 53mm Flat Plate Intake Restrictor"
BMW 325is M-Technic (1994): "~~56mm~~ 53mm Flat Plate Intake Restrictor"
BMW 325i/is E-36 (92-95): "~~56mm~~ 53mm Flat Plate Intake Restrictor"

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In EP Spec Lines, BMW Z3 2.5L, change Weight as follows:
"~~2500~~ 2550
*~~2563~~ 2614
**~~2625~~ 2678"

2026-01-01 FF Formula F Alternative Tire Rule Proposed Clarifications

#39281 from Jay Messenger · Rule change · TB 26-01 (2026-01 Fastrack)

In FF, GCR section 9.1.1.B.10.e, change as follows:
"Alternatively, Formula F cars ~~with rocker arm suspension (e.g., 1987-90 Reynard, Swift DB1,) and/or outboard suspension on at~~
~~least one chassis end~~ homologated in 1989 or earlier with any combination of rocker arm or outboard suspension on all four
corners (e.g., 1987 – 1990 Reynard, Swift DB1) may use the following alternative tires. Note: This rule is intended to allow older
cars with the described suspension design to use the alternative tires. It is not to be exploited by modifying cars with push-rods or
pull-rods to meet the above requirements or by modifying either end of older cars to push- or pull-rod suspension to be eligible to
run the alternative tires. Cars that were homologated in 1989 or earlier with push- or pull-rod suspension on no more than two
corners may seek approval to run the alternative tire by utilizing the compliance process outlined in GCR section 8.1.4."

2026-01-01 EP Request to Update E30 BMW Throttle Body Diameter Verbiage

#39363 from Tim Schreyer · Rule change · TB 26-01 (2026-01 Fastrack)

In EP Spec Line BMW 325i/is E30 (84-91), change Drivetrain Notes as follows:
"Fuel Injection, TB: 60mm"

2026-01-01 AS Restrictor Plate Change for Gen 2 Ford Coyote Engine

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

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"

2026-02-01 AS Edelbrock manifold (& timing kit) to Chevy LS Spec Lines Request

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

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)"

2026-03-01 AS Re-Organization of AS Spec lines for 2026

#39887 from American Sedan Committee · Rule change · TB 26-03 (2026-03 Fastrack)

This AS Spec Lines re-organization simplifies the Spec Lines for all drivers. This version gives the chassis information on what
engines can be put in their cars. It removes information that is now repeated in the ruleset and adds engine/weight combos as
well as wheelbase/tire size information. The Notes in the Spec Lines have been reviewed to remove information now listed in
the engine build sheets and retain information pertinent to the chassis selected. Where there is nothing in the notes, it is not an
error. It just means everything a driver needs is now in the main rules or the build sheets.
In AS Spec Lines, delete current Spec Line in its entirety as follows:

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

2026-03-01 SRF SRF3 Spark Plugs

#39899 from Robey Clark · Rule change · TB 26-03 (2026-03 Fastrack)

In SRF, GCR section 9.1.8.D.2.H.18, add the following:
"Spark Plugs: P/N G301041 ONLY NGK LTR7IX-11 / Washers or sealing rings are not allowed for any purpose."

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

Sectors

S1 SF → IM1
S2 IM1 → IM2
S3 IM2 → SF
SPd IM2 → IM3 0.02 mi

Sectors are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.