BoP Lab / Road America

HP at Road America

No mapRunoffs 2020

This track has been raced on 2 configurations (Scoring Sidebar Race, 4.05 mi; 4.01 mi). Laps on different configurations are not comparable, so only events on the 4.05 mile layout are shown; switch above to see the others.

Sectors are not comparable across all of these events. Sector times and the theoretical lap use Runoffs 2025, Runoffs 2026 only. Runoffs 2020 (different number of sectors), Runoffs 2024 (different number of sectors) count towards whole-lap times and trap speed only.

Pos	Car	Driver	Class	#	Lap	Theoretical	Qual	Race	5-lap stint	Consistency	Trap	S1	S2	S3	S4
1	Austin-Healey Sprite	Tom Tuttle	HP	11, 11x	2:33.498 C-P3	2:33.311					130.9 C-P3	44.166 C-P3	58.663 C-P3	29.647 C-P3	20.835 C-P3
2	Volkswagen Rabbit (1984)	Chuck Mathis	HP	54	2:37.731 E-R	2:37.731	2:38.445 E-Q3	2:37.731 E-R	2:38.298 E-R	+0.807 E-R	121.9 C-R	46.122 C-R	1:00.159 C-Q1	30.660 C-R	21.588 C-Q1
3	Triumph Spitfire (1975)	Steve Sargis	HP	18	2:38.036 A-R	2:36.652	2:38.785 C-Q1	2:38.036 A-R	2:38.864 A-R	+1.580 A-R	122.1 A-R	45.400 A-R	59.393 A-R	30.608 A-R	21.251 A-R
4	Mazda 2 (2011)	Jesse Prather	HP	34	2:38.104 E-R	2:37.923	2:38.629 E-Q3	2:38.104 E-R	2:38.369 E-R	+0.427 E-R	124.3 C-R	45.901 A-R	59.659 A-R	30.748 C-R	21.615 A-Q3
5	Volkswagen Jetta 1780 (1990)	Chris Schaafsma	HP	23	2:38.539 A-R	2:37.632	2:39.406 A-Q3	2:38.539 A-R	2:39.048 A-R	+1.080 A-R	124.9 C-R	45.754 A-R	59.795 A-R	30.443 A-R	21.640 A-R
6	Nissan 210	Daniel Meller	HP	64	2:39.695 G-Q3		2:39.695 G-Q3	2:53.550 G-R			120.4 G-Q1
7	Fiat X 1/9 (1980)	Matt Brannon	HP	22	2:39.961 E-R	2:39.805	2:40.723 C-Q1	2:39.961 E-R	2:40.257 E-R	+1.312 E-R	122.1 C-R	46.658 C-R	1:00.516 C-Q1	30.959 C-R	21.672 C-Q1
8	Volkswagen Golf	Christopher Schaafsma	HP	20	2:39.982 G-Q3		2:39.982 G-Q3				119.7 G-Q3
9	Volkswagen Golf (1985)	Chris W Albin	HP	3	2:40.008 E-R	2:40.008	2:41.817 E-Q2	2:40.008 E-R	2:40.238 E-R	+1.045 E-R	119.9 E-R	47.911 A-Q3, A-R	1:01.325 A-R	32.291 A-R	22.267 A-R
10	Fiat X 1/9 (1980)	Brayden Connolly	HP	12, 12x	2:40.631 C-R	2:40.024	2:42.510 C-Q1	2:40.631 C-R	2:41.050 C-R	+0.860 C-R	128.8 E-P1	46.378 C-R	1:00.709 C-R	31.006 C-R	21.931 A-R
11	Honda Civic Si (1984)	Greg Gauper	HP	15	2:41.864 E-Q2	2:41.864	2:41.864 E-Q2	2:42.260 E-R	2:42.706 E-R	+1.061 E-R	120.7 E-Q2, C-R	47.304 C-R	1:01.157 A-R	31.474 C-R	22.149 C-R
12	Mazda 2	Mark Brakke	HP	04	2:41.869 G-Q3		2:41.869 G-Q3	2:50.192 G-R			121.5 G-Q1
13	Mini Cooper (2002)	Robert Bax	HP	33	2:42.029 E-R	2:42.029	2:43.992 E-Q3	2:42.029 E-R	2:42.525 E-R	+1.560 E-R	118.9 E-Q2	48.798 A-P3	1:03.152 A-P3	32.594 A-P2	22.932 A-P3
14	Volkswagen Golf (1985)	Ralf Lindow	HP	53	2:42.478 E-Q3	2:42.478	2:42.478 E-Q3	2:45.648 C-R	2:47.011 C-R	+1.922 C-R	120.0 C-R	47.879 C-Q1	1:01.569 C-Q1	32.161 C-R	22.469 C-Q1
15	Volkswagen Golf (1985)	Angus Crome	HP	42, 142	2:42.613 A-R	2:41.432	2:42.967 C-Q1	2:42.613 A-R	2:43.479 C-R	+1.449 C-R	121.9 C-R	47.054 A-R	1:00.867 C-R	31.294 C-R	22.217 C-Q1
16	Volkswagen Golf (1986)	Brooke Fairbanks	HP	20	2:42.865 A-R	2:42.178	2:52.331 A-Q3	2:42.865 A-R	2:43.787 A-R	+2.333 A-R	118.9 A-R	47.120 A-R	1:01.561 A-R	31.354 A-R	22.143 A-R
17	MG Midget	Lee Fleming	HP	00	2:43.043 G-Q3		2:43.043 G-Q3				115.5 G-Q1
18	Volkswagen Scirocco (1987)	William Trainer	HP	7	2:43.835 E-R		2:44.139 E-Q2	2:43.835 E-R	2:44.824 E-R	+1.075 E-R	123.1 G-Q1
19	Honda CR-X Si (1986)	William Lamkin	HP	86	2:44.083 C-Q1	2:43.421	2:44.083 C-Q1				116.5 C-P1	47.589 C-P2	1:01.367 C-Q1	32.194 C-Q1	22.271 C-Q1
20	MG Midget (1976)	Kendall Jones 2+ cars	HP	80	2:44.504 E-R	2:44.504	2:48.894 E-Q2	2:44.504 E-R	2:47.268 E-R	+5.479 E-R	115.8 E-R	49.715 A-Q3	1:03.262 A-Q3	32.910 A-Q3	23.360 A-Q3
21	Volkswagen Scirocco	Mike Origer	HP	0	2:44.606 G-Q2		2:44.606 G-Q2	2:52.820 G-R			120.4 G-Q3
22	Honda CR-X (1987)	Vesa Silegren	HP	60	2:45.056 G-Q3		2:45.056 G-Q3	2:56.823 G-R			117.8 G-Q3
23	Austin-Healey Sprite (1976)	Kendall Jones 2+ cars	HP	80	2:46.104 C-R	2:44.969	2:47.829 C-Q2	2:46.104 C-R	2:46.970 C-R	+1.433 C-R	117.4 C-R	48.293 C-R	1:02.266 C-R	31.893 C-R	22.517 C-R
24	Honda Civic (1986)	Enrik Benazic	HP	111, 11	2:46.775 C-R	2:45.669	2:47.320 C-Q1	2:46.775 C-R	2:48.150 C-R	+1.860 C-R	119.6 C-R	48.001 C-R	1:02.572 C-R	32.501 C-Q2	22.595 C-Q1
25	Triumph Spitfire (1962)	Andrew Wright 2+ cars	HP	07	2:47.651 E-R	2:47.239	2:48.306 C-Q1	2:47.651 E-R	2:49.035 E-R	+1.547 E-R	115.7 C-R	48.443 C-P2	1:03.525 C-R	32.465 C-Q1	22.806 C-Q1
26	Mini Cooper (2004)	Leanna Wright	HP	02, 05	2:48.126 G-Q2	2:48.126	2:48.126 G-Q2	2:49.159 E-R	2:49.850 E-R	+0.946 E-R	114.1 E-Q2	50.280 C-Q2	1:04.984 C-R	33.563 C-R	23.292 C-Q1
27	Austin-Healey Sprite (1962)	Jerry Oleson	HP	81	2:48.560 E-Q2	2:48.560	2:48.560 E-Q2	2:50.739 E-R			114.0 E-Q2	49.638 A-R	1:03.823 A-R	33.768 A-R	23.649 A-R
28	Triumph Spitfire (1977)	Tom Broring 2+ cars	HP	90	2:49.064 E-R		2:51.567 E-Q3	2:49.064 E-R	2:51.655 E-R	+2.685 E-R	112.5 E-R
29	Volkswagen Scirocco (1976)	Joe Camilleri	HP	06	2:49.394 E-R	2:49.394	2:51.500 E-Q2	2:49.394 E-R	2:49.881 E-R	+1.031 E-R	114.9 E-Q2	50.290 C-P2	1:04.829 C-Q1	33.396 C-Q1	23.314 C-P2
30	Toyota Yaris (2012)	Tom Broring 2+ cars	HP	5	2:49.874 C-R	2:48.881	2:51.679 C-Q2	2:49.874 C-R	2:50.387 C-R	+0.564 C-R	119.1 A-R	49.478 A-R	1:03.531 C-R	33.050 C-R	22.822 A-R
31	Volkswagen Rabbit (1982)	Vincent LaManna	HP	84	2:50.529 E-Q1		2:50.529 E-Q1	2:52.530 E-R			112.7 E-P1
32	Nissan PL510 (1970)	R Paul Evans	HP	27	2:52.174 E-R	2:52.174	2:56.513 E-Q1	2:52.174 E-R	2:52.666 E-R	+0.853 E-R	117.1 E-R	50.297 C-P1	1:09.747 C-P1	36.046 C-P1	23.692 C-P1
33	Austin-Healey Sprite (1966)	Michael Miller	HP	98	2:52.987 E-R		2:53.851 E-Q2	2:52.987 E-R	2:55.375 E-R	+2.923 E-R	110.7 E-Q2
34	MG Midget	Jack Schulz	HP	75	2:54.267 G-Q3		2:54.267 G-Q3	3:06.539 G-R			106.9 G-Q1
35	Honda Civic	Riley Salyer	HP	122	2:55.120 G-Q2		2:55.120 G-Q2	3:01.006 G-R			110.6 G-Q2
36	Volkswagen Golf	Robin Bank	HP	94	2:55.176 G-Q3		2:55.176 G-Q3	3:09.501 G-R			111.1 G-Q3
37	Honda CR-X (1989)	Robert E Horrell_Jr >115%	HP	91	3:00.565 C-Q2	2:59.754	3:00.565 C-Q2				117.2 C-Q2	51.072 C-Q2	1:09.269 C-Q2	35.001 C-Q2	24.412 C-Q2
38	Volkswagen Rabbit (1984)	Ray Elliott >115%	HP	13	3:02.488 A-Q3	3:02.042	3:02.488 A-Q3				109.5 A-Q3	51.876 A-Q3	1:09.549 A-Q3	36.269 A-Q3	24.348 A-Q3
39	Toyota Corolla	Andrew Wright 2+ cars >115%	HP	21	3:03.036 G-Q2		3:03.036 G-Q2				109.3 G-Q2

One row per driver and car (a driver who changed cars has a row for each). Each cell is that driver's best in that car across the selected events, with the session it was set in. Best 5-lap stint is the mean of the driver's quickest five consecutive race laps, and consistency is how far their median race lap sat behind their best in that race (small is a driver who does it every lap); both come from the race with the best stint. The fastest in each column is purple, and a car whose best lap is more than 115% of the fastest in its class is greyed (marked ">115%" beside the driver) and left out of the colour scale. Click a column to sort, a row to highlight it. Theoretical lap is the sum of the best sectors, whichever laps they came from, and never slower than the best lap (where a car's fastest laps were recorded without sector times, its best lap is used). The 115% mark is about the car's best lap only: a car whose best lap is within 115% of the fastest in its class is never marked. Greyed sectors with no theoretical lap mean the sector times on file do not add up to a believable lap. Letters refer to the events above; Q is qualifying, R a race.

Sectors

S1 SF → I4AT 1.26 mi
S2 I4AT → I11 1.65 mi
S3 I11 → I13AB 0.57 mi
S4 I13AB → SF 0.57 mi
SF Spd SF → SFT 0.02 mi
Spd I4AT → I4A 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.

By car

Car	Class	Drivers	Lap	Qual	Race	Trap	S1	S2	S3	S4
Austin-Healey Sprite	HP	4	2:33.498Tom Tuttle	2:47.829Kendall Jones	2:46.104Kendall Jones	130.9Tom Tuttle	44.166Tom Tuttle	58.663Tom Tuttle	29.647Tom Tuttle	20.835Tom Tuttle
Austin-Healey Sprite	HP	1	2:33.498Tom Tuttle			130.9Tom Tuttle	44.166Tom Tuttle	58.663Tom Tuttle	29.647Tom Tuttle	20.835Tom Tuttle
Austin-Healey Sprite (1976)	HP	1	2:46.104Kendall Jones	2:47.829Kendall Jones	2:46.104Kendall Jones	117.4Kendall Jones	48.293Kendall Jones	1:02.266Kendall Jones	31.893Kendall Jones	22.517Kendall Jones
Austin-Healey Sprite (1962)	HP	1	2:48.560Jerry Oleson	2:48.560Jerry Oleson	2:50.739Jerry Oleson	114.0Jerry Oleson	49.638Jerry Oleson	1:03.823Jerry Oleson	33.768Jerry Oleson	23.649Jerry Oleson
Austin-Healey Sprite (1966)	HP	1	2:52.987Michael Miller	2:53.851Michael Miller	2:52.987Michael Miller	110.7Michael Miller
Volkswagen Rabbit	HP	3	2:37.731Chuck Mathis	2:38.445Chuck Mathis	2:37.731Chuck Mathis	121.9Chuck Mathis	46.122Chuck Mathis	1:00.159Chuck Mathis	30.660Chuck Mathis	21.588Chuck Mathis
Volkswagen Rabbit (1984)	HP	2	2:37.731Chuck Mathis	2:38.445Chuck Mathis	2:37.731Chuck Mathis	121.9Chuck Mathis	46.122Chuck Mathis	1:00.159Chuck Mathis	30.660Chuck Mathis	21.588Chuck Mathis
Volkswagen Rabbit (1982)	HP	1	2:50.529Vincent LaManna	2:50.529Vincent LaManna	2:52.530Vincent LaManna	112.7Vincent LaManna
Triumph Spitfire	HP	3	2:38.036Steve Sargis	2:38.785Steve Sargis	2:38.036Steve Sargis	122.1Steve Sargis	45.400Steve Sargis	59.393Steve Sargis	30.608Steve Sargis	21.251Steve Sargis
Triumph Spitfire (1975)	HP	1	2:38.036Steve Sargis	2:38.785Steve Sargis	2:38.036Steve Sargis	122.1Steve Sargis	45.400Steve Sargis	59.393Steve Sargis	30.608Steve Sargis	21.251Steve Sargis
Triumph Spitfire (1962)	HP	1	2:47.651Andrew Wright	2:48.306Andrew Wright	2:47.651Andrew Wright	115.7Andrew Wright	48.443Andrew Wright	1:03.525Andrew Wright	32.465Andrew Wright	22.806Andrew Wright
Triumph Spitfire (1977)	HP	1	2:49.064Tom Broring	2:51.567Tom Broring	2:49.064Tom Broring	112.5Tom Broring
Mazda 2	HP	2	2:38.104Jesse Prather	2:38.629Jesse Prather	2:38.104Jesse Prather	124.3Jesse Prather	45.901Jesse Prather	59.659Jesse Prather	30.748Jesse Prather	21.615Jesse Prather
Mazda 2 (2011)	HP	1	2:38.104Jesse Prather	2:38.629Jesse Prather	2:38.104Jesse Prather	124.3Jesse Prather	45.901Jesse Prather	59.659Jesse Prather	30.748Jesse Prather	21.615Jesse Prather
Mazda 2	HP	1	2:41.869Mark Brakke	2:41.869Mark Brakke	2:50.192Mark Brakke	121.5Mark Brakke
Volkswagen Jetta	HP	1	2:38.539Chris Schaafsma	2:39.406Chris Schaafsma	2:38.539Chris Schaafsma	124.9Chris Schaafsma	45.754Chris Schaafsma	59.795Chris Schaafsma	30.443Chris Schaafsma	21.640Chris Schaafsma
Nissan 210	HP	1	2:39.695Daniel Meller	2:39.695Daniel Meller	2:53.550Daniel Meller	120.4Daniel Meller
Fiat X-1/9	HP	2	2:39.961Matt Brannon	2:40.723Matt Brannon	2:39.961Matt Brannon	128.8Brayden Connolly	46.378Brayden Connolly	1:00.516Matt Brannon	30.959Matt Brannon	21.672Matt Brannon
Volkswagen Golf	HP	6	2:39.982Christopher Schaafsma	2:39.982Christopher Schaafsma	2:40.008Chris W Albin	121.9Angus Crome	47.054Angus Crome	1:00.867Angus Crome	31.294Angus Crome	22.143Brooke Fairbanks
Volkswagen Golf	HP	2	2:39.982Christopher Schaafsma	2:39.982Christopher Schaafsma	3:09.501Robin Bank	119.7Christopher Schaafsma
Volkswagen Golf (1985)	HP	3	2:40.008Chris W Albin	2:41.817Chris W Albin	2:40.008Chris W Albin	121.9Angus Crome	47.054Angus Crome	1:00.867Angus Crome	31.294Angus Crome	22.217Angus Crome
Volkswagen Golf (1986)	HP	1	2:42.865Brooke Fairbanks	2:52.331Brooke Fairbanks	2:42.865Brooke Fairbanks	118.9Brooke Fairbanks	47.120Brooke Fairbanks	1:01.561Brooke Fairbanks	31.354Brooke Fairbanks	22.143Brooke Fairbanks
Honda Civic Si	HP	3	2:41.864Greg Gauper	2:41.864Greg Gauper	2:42.260Greg Gauper	120.7Greg Gauper	47.304Greg Gauper	1:01.157Greg Gauper	31.474Greg Gauper	22.149Greg Gauper
Honda Civic Si (1984)	HP	1	2:41.864Greg Gauper	2:41.864Greg Gauper	2:42.260Greg Gauper	120.7Greg Gauper	47.304Greg Gauper	1:01.157Greg Gauper	31.474Greg Gauper	22.149Greg Gauper
Honda Civic (1986)	HP	1	2:46.775Enrik Benazic	2:47.320Enrik Benazic	2:46.775Enrik Benazic	119.6Enrik Benazic	48.001Enrik Benazic	1:02.572Enrik Benazic	32.501Enrik Benazic	22.595Enrik Benazic
Honda Civic	HP	1	2:55.120Riley Salyer	2:55.120Riley Salyer	3:01.006Riley Salyer	110.6Riley Salyer
Mini Cooper	HP	2	2:42.029Robert Bax	2:43.992Robert Bax	2:42.029Robert Bax	118.9Robert Bax	48.798Robert Bax	1:03.152Robert Bax	32.594Robert Bax	22.932Robert Bax
Mini Cooper (2002)	HP	1	2:42.029Robert Bax	2:43.992Robert Bax	2:42.029Robert Bax	118.9Robert Bax	48.798Robert Bax	1:03.152Robert Bax	32.594Robert Bax	22.932Robert Bax
Mini Cooper (2004)	HP	1	2:48.126Leanna Wright	2:48.126Leanna Wright	2:49.159Leanna Wright	114.1Leanna Wright	50.280Leanna Wright	1:04.984Leanna Wright	33.563Leanna Wright	23.292Leanna Wright
MG Midget	HP	3	2:43.043Lee Fleming	2:43.043Lee Fleming	2:44.504Kendall Jones	115.8Kendall Jones	49.715Kendall Jones	1:03.262Kendall Jones	32.910Kendall Jones	23.360Kendall Jones
MG Midget	HP	2	2:43.043Lee Fleming	2:43.043Lee Fleming	3:06.539Jack Schulz	115.5Lee Fleming
MG Midget (1976)	HP	1	2:44.504Kendall Jones	2:48.894Kendall Jones	2:44.504Kendall Jones	115.8Kendall Jones	49.715Kendall Jones	1:03.262Kendall Jones	32.910Kendall Jones	23.360Kendall Jones
Volkswagen Scirocco	HP	3	2:43.835William Trainer	2:44.139William Trainer	2:43.835William Trainer	123.1William Trainer	50.290Joe Camilleri	1:04.829Joe Camilleri	33.396Joe Camilleri	23.314Joe Camilleri
Volkswagen Scirocco (1987)	HP	1	2:43.835William Trainer	2:44.139William Trainer	2:43.835William Trainer	123.1William Trainer
Volkswagen Scirocco	HP	1	2:44.606Mike Origer	2:44.606Mike Origer	2:52.820Mike Origer	120.4Mike Origer
Volkswagen Scirocco (1976)	HP	1	2:49.394Joe Camilleri	2:51.500Joe Camilleri	2:49.394Joe Camilleri	114.9Joe Camilleri	50.290Joe Camilleri	1:04.829Joe Camilleri	33.396Joe Camilleri	23.314Joe Camilleri
Honda CR-X Si	HP	3	2:44.083William Lamkin	2:44.083William Lamkin	2:56.823Vesa Silegren	117.8Vesa Silegren	47.589William Lamkin	1:01.367William Lamkin	32.194William Lamkin	22.271William Lamkin
Honda CR-X Si (1986)	HP	1	2:44.083William Lamkin	2:44.083William Lamkin		116.5William Lamkin	47.589William Lamkin	1:01.367William Lamkin	32.194William Lamkin	22.271William Lamkin
Honda CR-X (1987)	HP	1	2:45.056Vesa Silegren	2:45.056Vesa Silegren	2:56.823Vesa Silegren	117.8Vesa Silegren
Honda CR-X (1989)	HP	1	3:00.565Robert E Horrell_Jr	3:00.565Robert E Horrell_Jr		117.2Robert E Horrell_Jr	51.072Robert E Horrell_Jr	1:09.269Robert E Horrell_Jr	35.001Robert E Horrell_Jr	24.412Robert E Horrell_Jr
Toyota Yaris	HP	1	2:49.874Tom Broring	2:51.679Tom Broring	2:49.874Tom Broring	119.1Tom Broring	49.478Tom Broring	1:03.531Tom Broring	33.050Tom Broring	22.822Tom Broring
Nissan PL510	HP	1	2:52.174R Paul Evans	2:56.513R Paul Evans	2:52.174R Paul Evans	117.1R Paul Evans	50.297R Paul Evans	1:09.747R Paul Evans	36.046R Paul Evans	23.692R Paul Evans
Toyota Corolla	HP	1	3:03.036Andrew Wright	3:03.036Andrew Wright		109.3Andrew Wright

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

Runoffs 2020 → Runoffs 2024 2020-10-02 to 2024-10-01

2020-12-01 HP Mk2 VW Consistency and Cleanup of FP and HP Spec Lines

#29195 from Christopher Schaafsma · Rule change · TB 20-12 (2020-12 Fastrack)

fasterFP Volkswagen Golf and Jetta 1.8 lose 50 lbs each, to 1900. HP Jetta GLI engine code removed.

In Production, Spec Lines, Change as follows:
In FP:
"Volkswagen Golf
~~1.8~~ (GTI, GT, GL)
(85-92)"
Weight: "~~1950~~ 1900"
In FP:
"Volkswagen Jetta

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~~1.8~~ (GLI, GL)
(85-92)"
Weight: “~~1950~~ 1900"
In HP:
"Volkswagen Jetta
~~1780~~ (GLI, GL)
(85-92)"

2020-12-01 HP Correct Wording for Level 1 and Level 2 Induction Systems

#29406 from Ron Bartell · Rule change · TB 20-12 (2020-12 Fastrack)

neutralEP, FP, HP Level 1 and Level 2 induction systems: clarified carburetor and fuel injection rules, jets/needles/rods unrestricted in Level 2.

In Production, GCR section 9.1.5.E.1.b.1, make changes as follows:
"All inducted air must pass through the venturi(s) of the car’s carburetor(s). Any carburetor(s) with restricted venturi(s) must
retain such venturi(s) in the original location within the carburetor. The throttle plate, shaft location, and bore diameter (as
measured at the throttle plate) shall remain as specified. ~~Carburetor jets, jet needles, metering rods and needle valves are~~
~~unrestricted. Choke mechanisms, plates, rods, and actuating cables, wires, or hoses can be removed.~~ The number and type of
carburetors must not be changed from stock, unless otherwise specified by the vehicles spec line. In all other regards, standard
and approved optional carburetor(s) are unrestricted.
All single carbureted cars may fit a permitted optional carburetor. Where the use of one (1) 40 DCN, DCNF, IDF carburetor is

Show 19 more lines

specified, a permitted optional carburetor may be substituted. Permitted optional carburetors are:"
In GCR section 9.1.5.E.1.b.4, make changes as follows:
"Fuel injection: All inducted air must pass through the throttle body and be subject to control by the throttle butterfly. The stock
throttle body casting/housing must be retained. The inside dimensions of the throttle body casting/housing (as measured at the
throttle butterfly) ~~and all dimensions of the throttle butterfly~~ must remain stock, but ~~. T~~ the throttle body can otherwise be
ported and polished. The dimensions of the throttle butterfly must remain stock. The throttle butterfly shaft shall not be
relocated. The outside diameter of the portion of the throttle butterfly shaft located in the throttle body bore must be no
smaller than stock. The contour of the interface between the throttle butterfly shaft and the butterfly must remain stock. The
throttle butterfly and any throttle butterfly to shaft screws/bolts can be attached to the throttle butterfly shaft by any means
including welding or brazing. Holes or slots can be created in the throttle butterfly for purposes of idle adjustment only. The
number of injectors must remain stock. The mounting position and the injection point must be stock. Electronic fuel injection
may be substituted for the stock type of fuel injection. In all other respects the fuel injection system is unrestricted."
In GCR section 9.1.5.E.2.b.1, make changes as follows:
"All inducted air must pass through the venturi(s) of the car’s carburetor(s). Carburetor jets, jet needles, metering rods and
needle valves are unrestricted. Choke mechanisms, plates, rods, and actuating cables, wires, or hoses can be removed. The
number and type of carburetors must not be changed from stock, unless otherwise specified by the vehicles spec line. In all
other regards, standard and approved optional carburetor(s) must not be modified.
All single carbureted cars may fit a permitted optional carburetor. Where the use of one (1) 40 DCN, DCNF, IDF carburetor is
specified, a permitted optional carburetor may be substituted. Permitted optional carburetors are:"

2020-12-01 HP Weight Reduction for Datsun Roadster

#29409 from Samuel Neave · Rule change · TB 20-12 (2020-12 Fastrack)

fasterEP Datsun SRL 311U Roadster minimum weight reduced to 1925 lbs from 2000 lbs.

In EP Spec Line, Nissan/Datsun SRL 311U Roadster, change Weight as follows:
"~~2000~~ 1925"

2020-12-01 HP EP TR8 Adjustment

#29512 from Jeffrey Young · Rule change · TB 20-12 (2020-12 Fastrack)

fasterEP Triumph TR8 78-81 weight reduced from 2600 to 2500 lbs.

In EP Spec Lines, Triumph TR8 (78-81), change weight as follows:
"~~2600~~ 2500"

2021-01-01 HP Alternate Front Brake Rotors and Calipers for EP AH 3000

#29893 from Rich Walke · Rule change · TB 21-01 (2021-01 Fastrack)

neutralEP Austin-Healey 3000 Mk. I, II, III now allows TR-6 front calipers and discs as alternate.

In EP, Spec Lines, Austin-Healey 3000 Mk. I, II, III, add to Brakes Alt.: mm/(in.) as follows:
"Rear Disc: #H82462 Front calipers & discs from TR-6 (std. or alt)"

2021-04-01 HP Request to Classify 2012-2015 MINI Cooper Coupe in HP

#30167 from G. Brian Metcalf · Rule change · TB 21-04 (2021-04 Fastrack)

neutralHP Mini Cooper classification expands to include 12-15 Coupe model in existing spec line.

In HP Spec Lines, Mini Cooper (07-13) (includes 09-15 convertible), change as follows:
"Mini Cooper (07-13) (includes 09-15 convertible and 12-15 Coupe)"

2021-04-01 HP Request clarification on VW 1.8 Rabbit GTI Spec Line

#30368 from Andrew Benagh · Rule change · TB 21-04 (2021-04 Fastrack)

neutralHP Volkswagen Rabbit GTI 1780 (83-84) permits Mk2 VW front spindles, hubs and bearings.

In HP Spec Lines, Volkswagen Rabbit GTI 1780 (83-84), add to Notes as follows:
"Mk2 VW front spindles, hubs and bearings are permitted."

Applies to Volkswagen Rabbit on this page: Chuck Mathis, Ray Elliott

2021-05-01 HP Volvo 142 spec line complete.

#29479 from Mike Ogren · Rule change · TB 21-05 (2021-05 Fastrack)

neutralVolvo 142/142E moves from HP Spec P-1800 Engine to HP Prep with 1989cc OHV four-cylinder, 2450–2573 lbs.

In HP Spec Lines, delete the existing Volvo 142/142E P-1800 Engine spec line entirely, and classify Volvo 142/142E:

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

2021-05-01 HP Request to Classify 93-98 Volkswagen Golf to HP

#29790 from David Boles · Rule change · TB 21-05 (2021-05 Fastrack)

neutralVolkswagen Golf III/Jetta III 93-98 classified to HP at 2325–2441 lbs with 1984cc SOHC engine.

In HP Spec Lines, classify Volkswagen Golf III / Jetta III (93-98):

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

2021-05-01 HP Appeal of Request to Move Porsche 924 to HP

#30132 from Hayes Lewis · Rule change · TB 21-05 (2021-05 Fastrack)

neutralPorsche 924 (76-84) newly classified to HP with 2400-2520 lbs weight, fuel injection, 1984cc engine.

In HP Spec Lines, classify Porsche 924 (76-84):

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

2021-05-01 HP Change Classification of 84-87 Mazda 626 from FP to HP

#30350 from David Reiter · Rule change · TB 21-05 (2021-05 Fastrack)

neutral84-87 Mazda 626 reclassified from FP to HP with 2300–2415 lbs weight, 1998cc SOHC, dual 32mm carbs.

In HP Spec Lines, classify Mazda 626 (84-87):

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

2021-05-01 HP Fiat X1/9 brake rotors

#30423 from Daniel Snow · Rule change · TB 21-05 (2021-05 Fastrack)

neutralFP Fiat X1/9 brake rotors change to 257 (10.1) x 12 (.407) solid disc.

In FP Spec Line, Fiat X-1/9 & Bertone 1300, change Brakes Alt. as follows:
"(F&R) 257 (10.0 1) x 12 (.40 7) Solid Disc (Lancia/Fiat)"
In FP Spec Line, Fiat X-1/9 & Bertone, change Brakes Alt. as follows:
"(F&R) ~~Lancia~~ 257 (~~9.875~~ 10.1) x 12 (.40 7) Solid Disc (Lancia/Fiat)"

2021-06-01 HP 924 Brakes- and Thank You.

#30614 from Hayes Lewis · Rule change · TB 21-06 (2021-06 Fastrack)

fasterHP Spec Line Porsche 924 (76-84) brakes change from solid to vented disc.

In HP Spec Line Porsche 924 (76-84), change Brakes Std. as follows:
"~~Solid~~ Vented Disc"

2021-06-01 HP Clarify Application of Percentage Based Weight Penalties

#30669 from Production Committee · Rule change · TB 21-06 (2021-06 Fastrack)

slowerEP, FP, HP clarifies percentage weight penalties sum first, then apply to base weight, rounding to nearest pound.

In GCR, Section 9.1.5.C. add as follows:
"5. For percentage-based weight penalties, all applicable percentage values shall be summed first, and then applied to the
vehicle’s minimum specified base weight, as listed in the PCS. The minimum vehicle weight shall be rounded to the nearest
pound. For example, a car with a 1950lbs minimum specified base weight, that’s running a non-stock gear-engagement
transmission and non-stock brake rotors and/or calipers, would calculate its minimum weight as follows:
5% transmission penalty + 2% brakes penalty = 7% total penalty
7% total penalty * 1950 lbs base weight = 2086.5 lbs
2086.5 lbs rounded to nearest pound = 2087 lbs minimum weight"

2021-06-01 HP Correct Induction Error on new HP Mazda 626 Spec Line

#30702 from Production Committee · Rule change · TB 21-06 (2021-06 Fastrack)

unclearHP Mazda 626 (84-87) induction changed from dual 32mm sidedraft carbs to carburation or fuel injection.

In HP Spec Line, Mazda 626 (84-87), change Carb. No. & Type as follows:
"~~(2) Auto-type sidedraft w/32mm choke(s) on I.R. manifold, of~~ Carburation or fuel injection."

2021-07-01 HP Lotus/Caterham 7 America Request

#30392 from Larry Svaton · Rule change · TB 21-07 (2021-07 Fastrack)

unclearEP Lotus/Caterham 7 America carburetor changed from IT fuel injection prep to fuel injection.

In EP Spec Lines, Lotus / Caterham 7 America, change as follows:
Carburetor No. & Type: "I~~T fuel injection prep~~ Fuel injection"
Notes: "~~Engine is limited to IT preparation except modifications permitted in sections 9.1.5.E.2.e, 9.1.5.E.2.f, and 9.1.5.E.2.h.~~"

2021-07-01 HP Request to classify ITC Plymouth Arrow

#30588 from Steve Steeb · Rule change · TB 21-07 (2021-07 Fastrack)

neutralPlymouth Arrow 1598cc four-cylinder classified to HP at 1800 lbs minimum weight.

In HP Spec Lines, classify Plymouth Arrow, as follows:

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

2021-07-01 HP Reclassification of the 1984/85 BMW 318i from FP to HP

#30661 from David Vestrand · Rule change · TB 21-07 (2021-07 Fastrack)

neutralBMW 318i E30 (84-85) reclassified from FP to HP at 2200–2310 lbs with fuel injection and .425" valve lift limit.

In HP Spec Lines, classify BMW 318i/is E30 (84-85), as follows:

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

2021-07-01 HP Reclassify Daimler SP 250

#30721 from William Jarrell · Rule change · TB 21-07 (2021-07 Fastrack)

neutralDaimler SP 250 classified in EP at 2165 lbs with 2548 cc OHV 8-cylinder engine.

In EP Spec Lines, classify Daimler SP 250, as follows:

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

2021-08-01 HP Request to Allow F22c Engine for 2000-2003 Honda S2000

#30548 from Michael Unger · Rule change · TB 21-08 (2021-08 Fastrack)

unclearHonda S2000 (00-03) reclassified as EP Prep with F22c engine option: 1997cc or 2157cc, weight 2450–2636 lbs depending on displacement.

In EP Spec Lines, delete Honda S2000 (00-03) and Honda S2000 (04-09) in their entirety.
In EP Spec Lines, classify Honda S2000 as follows:

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

2021-08-01 HP Request a review of the S14 240SX in EP.

#30873 from Brett Whisenant · Rule change · TB 21-08 (2021-08 Fastrack)

fasterEP Nissan 240-SX S13/S14 loses 200-210 lbs minimum weight; comp ratio rises to 12.0:1, valve lift to .500.

In EP Spec Lines, Nissan 240-SX S13/S14 (91-98), change as follows:
Weight (lbs):
"~~2600~~ 2400
*~~2665~~ 2460
**~~2730~~ 2520"
Notes: "Comp. Ratio limited to ~~10.5:1~~ 12.0:1. Valve lift limited to .~~450~~ 500”."

2021-10-01 HP E&O; MR2 Track

#31120 from Greg Amy · Rule change · TB 21-10 (2021-10 Fastrack)

neutralHP Toyota MR-2 1.6L (85-89) track corrected to 15.47 inches front and rear.

In the HP "Toyota MR-2 1.6L (85-89)" spec line, please correct the Track column as follows:
"1532 47 / 1532 47"
In GCR, Section 9.1.5.C.4, please change as follows:
"Track specifications will be set at 103% of the car’s stock track, plus 2.5 inches."

2021-12-01 HP 944S2 Restrictor

#31396 from KEVIN Patterson · Rule change · TB 21-12 (2021-12 Fastrack)

slowerEP Porsche 944S2 89-91 requires 56mm flat plate intake restrictor; comp ratio max 12.0:1, valve lift max 0.500".

In EP Spec Lines, Porsche 944S2 (89-91), change Notes as follows:
"Comp. Ratio limited to 12.0:1, Valve lift limited to .500”, Dry sump is allowed. 56mm Flat Plate Intake Restrictor is required. In
order to facilitate the installation of the FPR, additional spacers/plates may be added to convert the mating area of the throttle
body and the intake manifold into a flat surface. These pieces must maintain the stock 60mm throttle body bore, the FPR must be
a separate piece that can be independently removed and measured, and the total thickness of all pieces (including the FPR)
cannot add up to more than 1” in thickness. Can use the stock fuel tank if stock rear bumper and bumper support structure
retained."

2021-12-01 HP Classing Clarification for 1986 Toyota Corolla FX16

#31527 from Brian Heffron · Rule change · TB 21-12 (2021-12 Fastrack)

neutralHP Corolla GTS RWD (84-87) added at 2300 lbs; HP Corolla FX16 FWD (87-88) added at 2260 lbs; old Corolla (84-87) removed.

In HP Spec Lines, delete the Toyota Corolla (84-87) Spec Line in its entirety.
In HP Spec Lines, classify the Toyota Corolla GTS (RWD) (84-87):

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

2022-01-01 HP Porsche 968 Engine Questions

#31478 from Hayes Flynn · Rule change · TB 22-01 (2022-01 Fastrack)

fasterEP Porsche 968 intake valve size increased from 37 to 39.0 mm.

In EP Spec Lines, Porsche 968 (92-95), change Intake Valve size as follows:
"(I) 37 39.0/(1.46 54)"

2022-01-01 HP PCS E. 2. n. 4. Add Axle Shaft to Allow FWD the Same Freedom

#31592 from Chris Schaafsma · Rule change · TB 22-01 (2022-01 Fastrack)

neutralEP, FP, HP front-wheel-drive cars may alter body and suspension to install alternate transmission, transaxle, and axle shaft.

In Production, GCR sections 9.1.5.E.1.n.4. and 9.1.5.E.2.n.4. change as follows:
"For rear wheel drive cars, the transmission tunnel and tunnel cover can be altered to allow the installation of an alternate
transmission and/or driveshaft. For front wheel drive cars, the body, unibody, frame, suspension crossmembers/subframes and
their components may be altered to the extent required to allow the installation of an alternate transmission, transaxle
and/or ~~driveshaft~~ axle shaft."

2022-01-01 HP Weight Adjustment To Fiat X1/9 Spec Lines, H-Production

#31653 from Matthew Brannon · Rule change · TB 22-01 (2022-01 Fastrack)

fasterHP Fiat X1/9 1500 loses 50 lbs to 1950; 1300 loses 45–47 lbs; Bertone 1500 loses 50–52 lbs.

In HP Spec Lines, make the following changes to Weight:
Fiat X-1/9 & Bertone 1500 (Level 2): "~~1840~~ 1790 *~~1886~~ 1835 **~~1932~~ 1880"
Fiat X-1/9 1300 (Level 2): "~~1695~~ 1650 *~~1737~~ 1691 **~~1780~~ 1733"
Fiat X-1/9 1300 (Level 1): "~~2115~~ 2060"
Fiat X-1/9 1500 (Level 1/2): "~~2000~~ 1950"

2022-01-01 HP 1500 Midget

#31665 from Jerry Oleson · Rule change · TB 22-01 (2022-01 Fastrack)

neutralAustin-Healey Sprite Mk I, II, III, IV and MG Midget classified in HP Prep with 1510–1586 lbs depending on prep level.

In HP, classify Austin-Healey Sprite Mk I, II, III, IV MG Midget (ALL) as follows:

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

2022-01-01 HP BMW Z3 2.5L Spec Line

#31724 from William Etherington · Rule change · TB 22-01 (2022-01 Fastrack)

neutralEP BMW Z3 2.5L allows alternate throttle body from 92-95 325i with Turner adapter; head casting 1738400 permitted with specific blocks.

In EP Spec Lines, BMW Z3 2.5L, change Notes as follows:
"Comp. Ratio Limited to 12.0:1, Valve lift limited to .500”. ~~To replace stock drive-by-wire throttle body, a~~ Alternate throttle body
from BMW 92-95 325i (part #13541748105) is permitted only with Turner Motorsports adapter plate (part #TEN9990850) is
~~permitted.~~ Cylinder head casting number 1738400 permitted with use of the allowed iron block (casting number 1748933 or
1738566)."

2022-01-01 HP Request weight requirement for 1500 MG Midget

#31802 from Louis Rainer · Rule change · TB 22-01 (2022-01 Fastrack)

neutralAustin-Healey Sprite Mk I–IV and MG Midget classified in HP with 1655 lbs minimum weight.

In HP, classify Austin-Healey Sprite Mk I, II, III, IV MG Midget (ALL) as follows:

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

2022-02-01 HP Throttle Body and Idle Air

#31800 from David Boles · Rule change · TB 22-02 (2022-02 Fastrack)

neutralEP, FP, HP classes allow stock/original idle control devices unmodified or completely removed with openings blocked.

In GCR, Section 9.1.5.E.1.b.1., change as follows:
“All inducted air must pass through the venturi(s) of the car’s carburetor(s), except that which passes through a stock/original
idle control device.“
In GCR, Section 9.1.5.E.1.b.4., change as follows:
“Fuel injection: All inducted air must pass through the throttle body and be subject to control by the throttle butterfly), except
that which passes through a stock/original idle control device.“
In GCR, Section 9.1.5.E.1.b., add the following:
”9. Stock/original idle control devices can be utilized in their original, unmodified location and condition, or completely removed

Show 10 more lines

and any resulting openings blocked off. “
In GCR, Section 9.1.5.E.2.b.1., change as follows:
“All inducted air must pass through the venturi(s) of the cars carburetor(s), except that which passes through a stock/original
idle control device. “
In GCR, Section 9.1.5.E.2.b.4., change as follows:
“Fuel Injection: All inducted air must pass through the throttle body and be subject to control by the throttle butterfly), except
that which passes through a stock/original idle control device. “
In GCR, Section 9.1.5.E.2.b., add the following:
“9. Stock/original idle control devices can be utilized in their original, unmodified location and condition, or completely removed
and any resulting openings blocked off. “

2022-02-01 HP Incorrect Valve Size Changes in Jan 2022 GCR for FIAT X1/9

#31990 from Matthew Brannon · Rule change · TB 22-02 (2022-02 Fastrack)

unclearHP Fiat X1/9 intake valves corrected to 36.3mm/1.43in; exhaust valves to 33.3mm/1.31in or 31.2mm/1.23in depending on level.

In HP Spec Lines, change Valve Specs as follows:
Fiat X-1/9 & Bertone 1500 - Level 2:
"(I) ~~35.5/(1.40)~~ 36.3/(1.43)
(E) ~~33.0/(1.30)~~ 33.3/(1.31)"
Fiat X-1/9 1300 - Level 2:
"(I) ~~35.5/(1.40)~~ 36.3/(1.43)
(E) 31.2/(1.23)"
Fiat X-1/9 1300 - Level 1:

Show 6 more lines

"(I) ~~35.5/(1.40)~~ 36.3/(1.43)
(E) 31.2/(1.23)
~~(E) 1.21~~"
Fiat X-1/9 1500 - Level 1/2:
"(I) ~~35.5/(1.40)~~ 36.3/(1.43)
(E) ~~33.0/(1.30)~~ 33.3/(1.31)"

2022-03-01 HP Weight Change for Competition Adjustment

#31182 from Jason Stine · Rule change · TB 22-01 (2022-01 Fastrack)

slowerHP Triumph Spitfire 1500 minimum weight increases to 1605 lbs, 1645 lbs, or 1685 lbs.

Effective 3/1/2022 In HP Spec Lines, Triumph Spitfire 1500, make changes to Weight as follows:
"~~1560~~ 1605
*~~1599~~ 1645
**~~1638~~ 1685"

Applies to Triumph Spitfire on this page: Steve Sargis, Andrew Wright, Tom Broring

2022-03-01 HP 1999 3.8L Ford Mustang to EP?

#31635 from Chris Dercole · Rule change · TB 22-03 (2022-03 Fastrack)

fasterFord Mustang 99-03 classified to EP at 2700/2768/2835 lbs; 94-98 Mustang weight reduced to 2550/2614/2678 lbs.

In EP Spec Lines, Ford Mustang (94-98), change weight as follows:
~~"2700~~ 2550
*~~2768~~ 2614
**~~2835~~ 2678"
In EP Spec Lines, classify Ford Mustang (99-03) as follows:

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

2022-03-01 HP EP Adjustments

#31858 from Production Committee · Rule change · TB 22-01 (2022-01 Fastrack)

slowerEP BMW Z3 2.5L intake restrictor reduced from 59mm to 58mm flat plate.

Effective 3/1/2022 In EP, make changes to BMW spec lines as follows:
BMW Z3 2.5L - 59 58mm Flat Plate Intake Restrictor is required with both stock or alternate throttle body.
BMW 328i/is E36 (96-99) - 62mm Flat Plate Intake Restrictor is required.
BMW 328i/ci E46 (01-06) - 62mm Flat Plate Intake Restrictor is required.
BMW 325i/is E46 (01-06) - 60mm Flat Plate Intake Restrictor is required.
BMW 325i/is E36 (92-95) - 60mm Flat Plate Intake Restrictor is required.
BMW 325is M-Technic (1994) - 60mm Flat Plate Intake Restrictor is required.

2022-03-01 HP Improved Touring Tires

#32064 from Greg Amy · Rule change · TB 22-03 (2022-03 Fastrack)

neutralEP, FP, HP Improved Touring cars may use any DOT-approved tire per section 9.3.45 in Production class.

In Production, GCR Section 9.1.5.B.5, change as follows:
"Any Improved Touring car meeting all the requirements of ITCS 9.1.3 may compete in the Production class in which the same
make, model and engine displacement car is classified. For Improved Touring cars competing in Production, the level of
preparation and modifications will be as determined by ITCS 9.1.3 and not by PCS 9.1.5, however any DOT approved tire as
defined by 9.3.45 is allowed."

2022-04-01 HP Mazda RX8 with 13b Rotary

#32170 from John Warren · Rule change · TB 22-04 (2022-04 Fastrack)

neutralEP Mazda RX-8 13B carburetor rules clarified: dual 2bbl carb, fuel injected throttle body, or stock fuel injection permitted.

In EP Spec Lines, Mazda RX-8 (04-11) (alternate), make the following changes to Carburetor. No. & Type:
"Renesis: Fuel Injection. 13B: d (1) Auto-type 2 bbl carb w/ 42mm choke(s) on a “dual-y” manifold, (1) 2 bbl fuel injected throttle
body w/ 42mm choke(s) on a “dual-y” manifold, or stock 13B fuel injection."

2022-04-01 HP Request Idle control valve clarification

#32178 from Joe Camilleri · Rule change · TB 22-04 (2022-04 Fastrack)

neutralEP and FP Production clarifies idle control valve rules: stock devices allowed original, removed with blocked ports, or mechanical replaced with electronic stock type.

In Production, GCR Section 9.1.5.E.1.b.9, add the following:
"Stock/original idle control devices can be utilized in their original, unmodified location and condition, or completely removed
and any resulting openings blocked off. A mechanical stock/original idle control device can be replaced with an electronic
stock/original type of idle control device, with the original mechanical idle ports in the throttle body blocked off."
In Production, GCR Section 9.1.5.E.2.b.9, add the following:
"Stock/original idle control devices can be utilized in their original, unmodified location and condition, or completely removed
and any resulting openings blocked off. A mechanical stock/original idle control device can be replaced with an electronic
stock/original type of idle control device, with the original mechanical idle ports in the throttle body blocked off."

2022-04-01 HP Classify VW New Beetle in HP.

#32241 from Brian Metcalf · Rule change · TB 22-04 (2022-04 Fastrack)

neutralHP Volkswagen New Beetle (98-05) classified at 2350 lbs minimum, 1984cc SOHC, fuel injection, 11.0:1 compression limit.

In HP Spec Lines, classify Volkswagen New Beetle (98-05) as follows:

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

2022-05-01 HP EP MX-5 Global Cup Car

#32218 from Production Committee · Rule change · TB 22-03 (2022-03 Fastrack)

slowerEP Mazda MX-5 Global Cup 16-22 minimum weight set to 2400 lbs; sequential gearbox allowed with +150 lbs penalty.

Effective 05/01/2022 In EP Spec Lines, Mazda MX-5 Global Cup (16-22), change as follows:
Weight (lbs): "~~see notes~~ 2400"
Notes: "Car preparation is limited to what is permitted by the MX-5 Global Cup rules, and the car must meet all MX-5 Global Cup
rules except as otherwise indicated within this spec line. Competitors must have the current MX-5 Global Cup rules in their
possession and present them upon request. Sequential gearbox is allowed with +150lbs."

2022-05-01 HP Please Class BMW 128i in EP

#32370 from Mark Uhlmann · Rule change · TB 22-05 (2022-04 Fastrack)

neutralBMW 128i (08-13) classified in EP at 2700 lbs minimum with stock throttle body, 11.0:1 compression ratio, 0.400 in. valve lift limits.

In EP Spec Lines, classify the BMW 128i (08-13) as follows:

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

2022-05-01 HP Inconsistency in Body Work Descriptions

#32396 from Production Committee · Rule change · TB 22-05 (2022-04 Fastrack)

fasterEP/FP/HP open cars may now use carbon fiber hardtops if they retain OEM appearance in all exterior profiles.

In Production Category Specifications, GCR Section 9.1.5.E.9.a.12 change as follows:
"Open cars must remove convertible soft tops and all attaching bracketry and hardware. If the stock windshield is retained, OEM
and aftermarket hardtops are allowed. Aftermarket hardtops must retain OEM appearance in all exterior profiles~~, and carbon~~
~~fiber construction is not allowed~~. Any hardtop must be attached by positive fasteners."

2022-06-01 HP Subaru BRZ Model Years

#32500 from Steve Gaetjens · Rule change · TB 22-06 (2022-06 Fastrack)

neutralEP Subaru BRZ and Toyota 86/Scion FR-S model year ranges updated to 13-20.

In EP Spec Lines, Subaru BRZ (2013), change title changes:
"Subaru BRZ (13 - 20)"
In EP Spec Lines, Toyota Scion FR-S (2013), change title changes:
"Toyota 86 / Scion FR-S (13 - 20)"

2022-09-01 HP Request to classify VW New Beetle 2.5L in EP

#32725 from G. Metcalf · Rule change · TB 22-09 (2022-09 Fastrack)

neutralVW New Beetle 2.5L 5-cyl added to EP at 2400–2520 lbs, 2480 cc, fuel injection, comp ratio 12.0:1 max, valve lift 0.500" max.

In EP Spec Lines, classify Volkswagen New Beetle (06-11) as follows:

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

2022-09-01 HP Request Rotary Injection on Dual Y manifold

#32775 from James Lindenthal · Rule change · TB 22-09 (2022-09 Fastrack)

unclearEP Mazda RX-7 12A/13B gains fuel injection option on dual-y manifold with 42mm choke(s).

Effective November 1, 2022, in EP Spec Lines, change Carburetor. No. & Type as follows:
Mazda RX-7 (12A/13B) (79-85):
"12A: (1) Nikki 4 bbl carburetor w/ primary choke(s) bored to match secondary choke(s) on a stock manifold or (1) Auto-type 2
bbl w/42mm choke(s) on a “dual-y” manifold. 13B: (1) Auto-type 2 bbl w/ 42mm choke(s) on a “dual-y” manifold, (1) 2 bbl fuel
injected throttle body w/ 42mm choke(s) on a “dual-y” manifold, or stock 13B fuel injection."
Mazda RX-7 (13B) (86-91):
"(1) Auto-type 2 bbl w/ 42mm choke(s) on a “dual-y” manifold, (1) 2 bbl fuel injected throttle body w/ 42mm choke(s) on a “dual-
y” manifold, or stock 13B fuel injection."

2022-09-01 HP Request for Corrado Stroke & Displacement Correction

#32985 from Douglas Hedges · Rule change · TB 22-09 (2022-09 Fastrack)

neutralEP VW Corrado 92-95 stroke corrected to 90.3 mm, displacement to 2792 cc.

In EP Spec Line, VW Corrado (92-95), change as follows:
Bore x Stroke mm/(in.): "81.0 x 90.4 3 (3.19 x 3.56)"
Displ. cc/(ci) (nominal): "278 92"

2023-01-01 HP MGB HP Weight Break and/or Hybrid 1/2 Prep in HP

#33127 from Neil Verity · Rule change · TB 23-01 (2023-01 Fastrack)

fasterMGB & MGB-GT HP weight breaks reduced to 2000, 2050, 2100 lbs; new MGB HP Prep 1/2 hybrid added at 2175 lbs.

In HP Spec Lines, MGB & MGB-GT, change Weight as follows:
~~"2050~~ 2000
*~~2101~~ 2050
**~~2153~~ 2100"
In HP Spec Lines, create new spec line as follows:

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

2023-01-01 HP Datsun 510 Help

#33568 from Brian Downey · Rule change · TB 23-01 (2023-01 Fastrack)

fasterHP Nissan/Datsun PL510 weight reduced: base 1960 to 1910 lbs, * 2009 to 1958 lbs, ** 2058 to 2006 lbs.

In HP Spec Line, Nissan/Datsun PL510, change Weight changes:
"~~1960~~ 1910
* ~~2009~~ 1958
** ~~2058~~ 2006"

Applies to Nissan PL510 on this page: R Paul Evans

2023-01-01 HP Review Limited Prep Port Matching Rules

#33600 from Production Committee · Rule change · TB 23-01 (2023-01 Fastrack)

neutralEP, FP, HP cylinder head ports limited to 1 inch maximum depth matching from mating surface.

In Production Category Specifications, GCR section 9.1.5.E.2.e.5., change as follows:
"Cylinder head ports may be matched to the intake and exhaust manifolds to a depth of no more than 1 inch from the port
mating surface."

2023-06-01 HP Request to Classify Sonic and Fiesta in HP

#34264 from Greg Amy · Rule change · TB 23-06 (2023-05 Fastrack)

neutralFord Fiesta HP and Chevrolet Sonic FP model year ranges extended from 2016 to 2019.

In HP, adjust model years of the "Ford Fiesta (11-16)" spec line as follows:
"Ford Fiesta (11-16 9)"
In FP, adjust model years of the "Chevrolet Sonic (12-16)" spec line as follows:
"Chevrolet Sonic (12-16 9)"

2023-07-01 HP ITC to FP?

#34286 from David Snow · Rule change · TB 23-06 (2023-07 Fastrack)

neutralHP Volkswagen Rabbit Cabriolet 1780 removed; Rabbit 1588 and 1715 reclassified with engine sizes and year ranges specified.

In HP Spec Lines, Volkswagen Rabbit Cabriolet 1780, delete in its entirely:
In HP, Spec Lines, Volkswagen Rabbit, change Title as follows:
“Volkswagen Rabbit 1588 ~~(includes Cabriolet / convertible)~~”
“Volkswagen Rabbit 1715 ~~(81-84) (excl. conv.)~~”
“Volkswagen Rabbit ~~GTI~~ 1780 ~~(83-84)~~”

Applies to Volkswagen Rabbit on this page: Chuck Mathis, Ray Elliott, Vincent LaManna

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

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

neutralFP and HP Sprite, Midget, and Spitfire 1500 intake valve size corrected to 36.6/(1.44).

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)"

Applies to Triumph Spitfire on this page: Steve Sargis, Andrew Wright, Tom Broring

2023-09-01 HP Larger chokes

#34681 from Brian Downey · Rule change · TB 23-09 (2023-09 Fastrack)

fasterHP Nissan/Datsun PL510 carburetors allow larger 4mm chokes, replacing 2mm specification.

In HP Spec Line, Nissan/Datsun PL510, change Carburetor. No. & Type as follows:
"(1) 40 DCN, DCNF w/ 32 4mm choke(s), . or (1) 36mm DCNVH. (2) auto type side draft(s) w/ 32 4mm choke(s) on I.R. manifold @
90lbs penalty."

Applies to Nissan PL510 on this page: R Paul Evans

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

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

neutralEP Porsche 944/924S combines 2.5L and 2.7L variants with new weights: 2250–2415 lbs depending on engine and year.

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 HP FP and HP Toyota Corolla

#35030 from Keith Church · Rule change · TB 23-12 (2023-12 Fastrack)

fasterFP Toyota Corolla 2TC loses 43 lbs to 1810; HP Corolla loses 50–52 lbs to 1910–2006.

In FP Spec Lines, Toyota Corolla 2TC (71-74), change weight as follows:
"~~1853~~ 1810"
In HP Spec Lines, Toyota Corolla (71-74), change weight as follows:
“~~1960~~ 1910
* ~~2009~~ 1958
** ~~2058~~ 2006”

Applies to Toyota Corolla on this page: Andrew Wright

2023-12-01 HP Weight Reduction for Mazda 626

#35031 from David Reiter · Rule change · TB 23-12 (2023-12 Fastrack)

fasterHP Mazda 626 84-87 weight reduced to 2200 lbs, 2255 lbs, and 2310 lbs across three configurations.

In HP Spec Lines, Mazda 626 (84-87), change weight as follows:
"~~2300~~ 2200
*~~2358~~ 2255
**~~2415~~ 2310"

2023-12-01 HP Triumph GT6 Adjustments

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

fasterEP Triumph GT6 minimum weight reduced to 1800 lbs.

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

2023-12-01 HP Request to Adjust Weight of 1988-1991 CRX/Civic

#35115 from Enrik Benazic · Rule change · TB 23-12 (2023-09 Fastrack)

fasterHP Honda CRX 1.5 (88-91) weight reduced to 2175 lbs, 2229 lbs, and 2284 lbs across three spec lines.

In HP Spec Lines, Honda CRX 1.5 (88-91), change weight as follows:
"~~2245~~ 2175
*~~2301~~ 2229
**~~2357~~ 2284"

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

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

slowerEP BMW Z3 2.5L weight increases to 2500 lbs, 2563 lbs with turbo, 2625 lbs with supercharger.

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

2024-01-01 HP Parity in HP

#35138 from Kendall Jones · Rule change · TB 24-01 (2024-01 Fastrack)

fasterHP Sprite/Midget Mk I–IV, Mk 1500 compression ratio raised to 12.0:1 at Prep Level 1/2.

In HP Spec Line, Austin-Healey Sprite Mk I, II, III, IV / MG Midget Mk I, II, III, IV & 1500, Prep Level 1/2, change Notes section as
follows:
"Compression ratio limited to 11 12.0:1"

2024-01-01 HP Spitfire classification

#35224 from Michael Walz · Rule change · TB 24-01 (2024-01 Fastrack)

unclearHP Triumph Spitfire 1500 valve spec changes from 36.6/5.5/(1.44/0) to 36.6/(1.44).

In HP spec line, Triumph Spitfire 1500, make the following change to the Valves column:
"(I) 36.6~~5.5~~/(1.440)"

Applies to Triumph Spitfire on this page: Steve Sargis, Andrew Wright, Tom Broring

2024-01-01 HP Miata Alternate Head

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

fasterEP Mazda MX-5 1.8L 1990-97 minimum weight drops to 2150 lbs; 1994-97 variants to 2000, 2050, 2100 lbs respectively.

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 HP Triumph GT6 Adjustments

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

fasterEP Triumph GT6 dual 1.75" carbs weight drops to 1940 lbs; triple Weber 40 DCOE options consolidated.

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 HP Honda S2000 throttle body

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

fasterEP Honda S2000 fuel injected throttle body inside diameter increases from 62mm to 64mm.

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 HP Front Header/Nose Panel Alternate Material For 84-87 CRX

#35301 from Darryl Saylor · Rule change · TB 24-01 (2024-01 Fastrack)

neutralHP Honda CRX/Si 84-87 front header/nose panel may use alternate material if appearance remains stock.

In HP Spec Lines, Honda CRX/Si (84-87), in Notes, make the following change:
"Compression ratio limited to 11.0:1, Valve lift limited to .390”. The front header/nose body panel can be replaced by a
replica which may be constructed of an alternate material provided its appearance remains stock."

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

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

neutralEP Triumph TR8 dry sump allowance moved from carburetor line to notes section.

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 HP Correction to EP 924S/944 Spec Line

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

neutralEP Porsche 944/924S 2.5L and 2.7L weight minimums corrected: 2479cc to 2306/2363 lbs, 2681cc to 2358/2415 lbs.

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.

2024-01-01 HP Review Classification of HP Mazda 2

#35318 from Production Committee · Rule change · TB 24-01 (2024-01 Fastrack)

slowerHP Mazda 2 (11-14) minimum weight increases to 1995 lbs, 2045 lbs with*, 2095 lbs with**.

In HP spec line, Mazda 2 (11-14), make the following weight changes:
"~~1920~~ 1995
*~~1968~~ 2045
**~~2016~~ 2095"

Applies to Mazda 2 on this page: Jesse Prather, Mark Brakke

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

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

fasterHP Honda Civic 1.5 (88-91) weight reduced to 2175 lbs base, 2229 lbs with power adder, 2284 lbs with two.

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

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

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

neutralHP removes four redundant VW spec lines: Rabbit Cabriolet 1780, Scirocco 1588, Scirocco 1780 8-valve, Scirocco 1588.

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

2024-05-01 HP Replace plastic panels

#35875 from Darryl Saylor · Rule change · TB 24-05 (2024-05 Fastrack)

neutralHP Honda CRX/Si 84-87 plastic panels can be replaced with replica alternate material if stock appearance maintained.

In HP spec line "Honda CRX/Si (84-87)", make the following change to the Notes section:
"The plastic OE front header/nose body panel, lower rocker side-skirt, and lower door cap panel can be replaced by a
replica, which may be constructed of an alternate material, provided its appearance remains stock."

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

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

neutralNissan 300ZX 84-89 classified to EP at 2550 lbs minimum, 2960cc 6-cyl SOHC, fuel injection, 12.0:1 compression limit, 0.500" valve lift limit.

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 HP RX7 1993 and Up Request In EP Spec Lines, classify

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

neutralMazda RX-7 92-97 newly classified EP Prep Level 2 at 2200–2310 lbs with 13B 6-port rotary engine.

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

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

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

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

neutralEP Mazda RX-8 (04-11) alternate spec line removed; one primary line remains.

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 HP Errant entry in HP production line item

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

neutralHP Volkswagen Golf and Jetta 85-92 track correction: front 1537mm (60.5in), rear 1529mm (60.2in).

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)"

Runoffs 2024 → Runoffs 2025 2024-10-01 to 2025-09-29

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

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

fasterHP Sprite and Midget 1275cc and 1098cc Level 2 compression ratio raised to 12.0:1.

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 HP Request for Classification of 1989-1994 Suzuki Swift GT 16V Twin

#36858 from Jorge Fabian · Rule change · TB 24-11 (2024-11 Fastrack)

neutralSuzuki Swift GT 89-94 newly classified to HP Pre at 1900 lbs, 1298cc DOHC fuel injected.

In HP Spec Lines, Classify Suzuki Swift GT (89-94) as follows:

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

2024-12-01 HP MINI Cooper Spec Line Correction - Rear Brake Rotor Diameter

#37176 from Robert Bax · Rule change · TB 24-12 (2024-12 Fastrack)

neutralHP Mini Cooper 02-06 rear brake rotor increases from 239/9.4 mm/in to 259/10.2.

In HP Spec Lines, Mini Cooper (02-06), change Brakes Std.mm/(in.) as follows:
"(F) 276/(10.9) Vented Disc (R) ~~239/(9.4)~~ 259/(10.2) Solid Disc"

Applies to Mini Cooper on this page: Robert Bax, Leanna Wright

2025-01-01 HP 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)

fasterEP BMW 325i/is E30 (84-91) weight reduced 50–52 lbs across three spec lines to 2150, 2204, 2258.

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

2025-01-01 HP Request to Update 1988-1991 Civic to Match 1988-1991 CRX

#37444 from ENRIK BENAZIC · Rule change · TB 25-01 (2025-01 Fastrack)

fasterHP Honda Civic 1.5 88-91 weight reduced to 2175 lbs base, 2229 lbs with one asterisk, 2284 lbs with two asterisks.

In HP SPEC LINES, Honda Civic 1.5 (88-91), change Weight as follows:
"~~2245~~ 2175
*~~2301~~ 2229
**~~2357~~ 2284"

Applies to Honda Civic Si on this page: Riley Salyer

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

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

slowerEP BMW Z3 2.5L requires 52mm flat plate intake restrictor; Z3 2.8L 55mm; 328i/is E36 58mm; 328i/ci E46 58mm; 325i/is E46 56mm; 325i/is E36 56mm; 325is M-Technic 56mm.

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 HP Request Competition Adjustment to BMW Z3 2.5L

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

slowerEP BMW Z3 and 3-series models get smaller intake restrictors: Z3 2.5L to 52mm, Z3 2.8L to 55mm, 328i to 58mm, 325i to 56mm.

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 HP Interpretation of Production Rules on Mirrors

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

neutralEP, FP, HP: interior or exterior mirrors meeting rule 9.3.36 now permitted.

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 HP HP Class Adjustments

#37459 from Production Committee · Rule change · TB 25-01 (2025-01 Fastrack)

slowerHP Mazda 2 11-14 base weight up 50 lbs to 2045; all VW 80s models up 50 lbs to 2150 base.

In HP SPEC LINES, change Weight as follows:
Mazda 2 (11-14)
"(Effective 3/1/2025) ~~1995~~ 2045
*~~2045~~ 2096
**~~2095~~ 2147"
Volkswagen Golf (GTI, GT, GL) (85-92)
"(Effective 3/1/2025) ~~2100~~ 2150
*~~2153~~ 2204

Show 13 more lines

**~~2205~~ 2258"
Volkswagen Jetta (GLI, GL) (85-92)
"(Effective 3/1/2025) ~~2100~~ 2150
*~~2153~~ 2204
**~~2205~~ 2258"
Volkswagen Rabbit 1780
"(Effective 3/1/2025) ~~2100~~ 2150
*~~2153~~ 2204
**~~2205~~ 2258"
Volkswagen Scirocco 1780 (8-valve) (83-88)
"(Effective 3/1/2025) ~~2100~~ 2150
*~~2153~~ 2204
**~~2205~~ 2258"

2025-03-01 HP Weight Reduction for Honda S2000

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

fasterEP Honda S2000 1997cc base loses 75 lbs to 2375; 2157cc base loses 60 lbs to 2450.

In EP, Spec Lines make the following weight changes:

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

2025-03-01 HP Mazda 1999 Miata 1.8L

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

fasterEP Mazda MX-5/Miata 99-05 minimum weight drops to 2100 lbs, 2153 lbs with power adder, 2205 lbs with two adders.

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

2025-03-01 HP MINI Cooper (07-13) Spec Line Correction: Errors and Omissions

#37560 from Robert Bax · Rule change · TB 25-03 (2025-03 Fastrack)

slowerHP Mini Cooper 07-13 engine corrected to DOHC; valve lift limit reduced to 0.390 inches.

In HP Spec Lines, Mini Cooper (07-13) (includes 09-15 convertible and 12-15 Coupe), change as follows:
Engine Type:
"4 Cyl
~~SOHC~~ DOHC"
Notes:
"Compression ratio limited to 11.0:1, Valve lift limited to ~~.450”~~.390"."

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

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

neutralChevrolet Spark 16-22 classified HP Pre at 1850 lbs minimum weight, fuel injected, 1399 cc.

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 HP Request to Lower Ford Festiva Minimum Weight to 1600 LBS

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

fasterHP Ford Festiva 88-93 minimum weight drops to 1600 lbs, variants to 1640 and 1680 lbs; compression ratio raised to 11.0:1.

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”."

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

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

fasterHP Fiat X-1/9 base weights reduced 50–53 lbs across 1300 and 1500 spec lines.

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 HP BMW Z4 update

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

slowerEP BMW Z4 03-05 restricted to 52mm flat plate intake restrictor.

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

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

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

fasterEP Fiat 124 Spider 1600 & 2000 weight drops 50 lbs to 2000; carburetors gain 2mm chokes to 36mm.

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."

Runoffs 2025 → Runoffs 2026 2025-09-29 to 2026-09-28

2025-10-01 HP HP Plymouth Arrow spec omission

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

neutralHP Plymouth Arrow transmission max speeds clarified to 4 or 5.

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

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

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

neutralEP, FP, HP wheel diameter added to Appendix G as absolute maximum specification.

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

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

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

neutralEP, FP, HP throttle body inside dimensions must remain stock with +/-.25mm tolerance; butterfly dimensions stock in FP, HP only.

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 HP Please Lower Weight of 280Z

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

fasterEP Nissan 280Z minimum weight reduced from 2560 to 2400 lbs.

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

2025-11-01 HP Miata Weight Adjustment Follow Up

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

fasterEP Mazda MX-5 1.8L 90-97 weight reduced to 2125 lbs from 2150 lbs.

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 HP Weight Break for 1098 Midget / Sprite

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

fasterHP Austin-Healey Sprite/Midget 1098cc minimum weight drops 80 lbs to 1550.

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

2025-11-01 HP HP Volvo 142 spec omission

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

slowerHP Volvo 142/142E gains compression ratio limit 12.0:1 and valve lift limit .425".

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 HP HP Mini DOHC 1.6

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

slowerHP Mini Cooper 07-15 valve lift reduced to .390", from .450".

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 HP Add to Rabbit description

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

neutralFP and HP Volkswagen Rabbit descriptions updated: Convertible changed to Cabriolet in FP; Cabriolet added to three HP engine variants.

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 HP Clean-up 9.1.5.E.7e

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

neutralEP, FP, HP: rear drum brake to disc conversion clarified; rotors solid, diameter limited to largest front rotor permitted.

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 HP Add TB size to Ford Mustang (94-98) Spec Line

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

neutralEP Ford Mustang (94-98) fuel injected throttle body inside diameter specified at 60.

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 HP Request to Re-Classsify Datsun SPL-311 to HP from FP

#39116 from Robert Heatwole · Rule change · TB 25-12 (2025-12 Fastrack)

neutralDatsun SPL-311 newly classified to HP at 2050 lbs with 1595cc OHV iron engine and specified carburetors.

In HP Spec Lines, classify Nissan/Datsun SPL 311 as follows:

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

2025-12-01 HP TR2 Notes E&O

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

unclearEP Triumph TR2-TR4A allows 5-speed gearbox without overdrive; removes Weber carb and weight specification.

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 HP Balance of Power

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

slowerEP BMW Z3 2.5L restrictor reduced 52mm to 50mm, weight increased to 2550 lbs base; five other BMW models get smaller restrictors.

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"

2025-12-01 HP Alternative BOP Request for 84-87 Honda CRX/Civic

#39223 from Bill Lamkin · Rule change · TB 25-12 (2025-12 Fastrack)

fasterHP Honda Civic and CRX models get wider 13-inch wheels: 6 to 7 inches.

In HP Spec Lines, change Wheels as follows:
Honda Civic: "13 x 6 7"
Honda Civic DX (92-95): "13 x 6 7"
Honda Civic/Si (84-87): "13 x 6 7"
Honda Civic 1.5 (88-91): "13 x 6 7"
Honda CRX/Si (84-87): "13 x 6 7"
Honda CRX 1.5(88-91): "13 x 67"

2026-01-01 HP E/O: Improve Consistency of the Spec Lines

#39500 from Robert Bax · Rule change · TB 26-01 (2026-01 Fastrack)

unclearHP Toyota MR-2 1.6L (85-89) compression ratio set to 11.0:1.

In HP Spec Line, Toyota MR-2 1.6L (85-89), change Comp. Ratio as follows:
"11.0:1"

2026-01-01 HP Request to Reclassify BMW 2002 Into H Production

#39567 from Jonathan Kinberg · Rule change · TB 26-01 (2026-01 Fastrack)

neutralBMW 2002 newly classified to H Production at 2350 lbs with 1990cc iron block, 40 DCNF carburetor, 11.0:1 compression.

In HP Spec Lines, classify BMW 2002, as follows:

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

2026-02-01 HP Triumph Spitfire 1296cc Compression Ratio Increase to 12:1

#39589 from Neil Verity · Rule change · TB 26-02 (2026-02 Fastrack)

fasterHP Triumph Spitfire 1296cc compression ratio increases from 11.0 to 12.0:1.

In HP Spec Lines, make the following spec line changes:
Triumph Spitfire:
Carburetion
"Valves: (I) 33.0/(1.30) (E) 29.7/(1.17)
Comp. ratio ~~11.0~~ 12.0:1, Valve lift .450”
Trans. Speeds: 4"
Triumph Spitfire Mk. III & IV 1500:
Carburetion

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"1300 Valves: (I) 33.0/(1.30) (E) 29.7/(1.17)
1500 Valves: (I) 36.6/(1.44) (E) 29.7/(1.17)
1300: Comp. ratio 12.0:1, Valve lift .450”
1500: Comp. ratio 11.0:1, Valve lift .450”
Trans. Speeds: 4"

2026-03-01 HP Clarification On Oil Cooler Ducting

#39604 from Chuck Allard · Rule change · TB 26-03 (2026-03 Fastrack)

neutralHP class mid and rear engine cars may add single inlet and outlet holes for oil cooler ducting in front bodywork.

In GCR, Section 9.1.5.E.6.g.4, add the following:
"On mid and rear engine cars, a single inlet hole may be cut in the front bodywork and a single outlet hole may be cut in the front
trunk floor or a wheel well, for the sole purpose of ducting air to a single engine oil cooler. The size of these holes may be no
larger than the area of the oil cooler itself."

2026-03-01 HP Honda Fit 2015-19 Error in Engine Classification

#39853 from Jose Fabian · Rule change · TB 26-03 (2026-03 Fastrack)

neutralHP Honda Fit 2015-19 engine reclassified from SOHC to DOHC.

In HP Spec Lines, Honda Fit (15-19), change Engine Type Mat’l Block/Head as follows:
"4 Cyl. ~~SOHC~~ DOHC"

2026-05-01 HP Miata track width - errors and omissions

#39976 from Production Committee · Rule change · TB 26-05 (2026-05 Fastrack)

neutralEP Mazda MX-5 94-97 front track widens to 1516 mm (59.7 in.), rear to 1534 mm (60.4 in.).

In EP Spec Lines, Mazda MX-5 / Miata (94-97), change Track (F/R) mm/(in.) as follows:
Track (F/R) mm/(in.): ~~"1483/1509 (58.4/59.4)~~ 1516/1534(59.7/60.4)"

2026-05-01 HP Triumph GT6 Spec Change.

#40098 from Anthony Parker · Rule change · TB 26-05 (2026-05 Fastrack)

fasterEP Triumph GT6 auto-type drivetrain choke increases from 44mm to 45mm.

In EP Spec Lines, Triumph GT6, change the "Drivetrain Notes" as follows:
"(2) auto-type w/44 45mm choke(s)"

2026-05-01 HP Request to Classify BMW E21 320i

#40110 from Doug DeRonne · Rule change · TB 26-05 (2026-05 Fastrack)

neutralBMW 320i/is E21 (80-83) newly classified in HP Spec Lines.

In HP Spec Lines, classify BMW 320i/is (E21) (80-83) as follows:

2026-05-01 HP BMW 318is 84-85 engine displacement correction

#40116 from Production Committee · Rule change · TB 26-05 (2026-05 Fastrack)

neutralHP BMW 318is 84-85 displacement corrected from 1797 to 1767 cc.

In HP Spec Lines, BMW 318i/is E30 (84-85), change Displacement Bore x Stroke mm/ (in.) as follows:
"~~1797~~ 1767 89.0 x 71.0 (3.50x2.80)"

2026-06-01 HP Austin Healy Sprite/ MG Midget 1275 Induction Change Request

#40213 from Michael MILLER · Rule change · TB 26-06 (2026-06 Fastrack)

fasterHP Austin-Healey Sprite and MG Midget 1275 permitted to use 1.5" SU carbs on alternate manifold with narrowed balance tube.

In HP Spec Lines, Austin-Healey Sprite Mk I, II, III, IV MG Midget Mk I, II, III, IV & 1500, change Drivetrain Notes as follows:
"(2) 1.25” SU w/ no modifications
(2) 1.5” SU w/ no modifications (on alternate manifold)
Valves: (I) 33.0/(1.30) (E) 29.5/(1.16)
Comp. ratio 12.0:1, Valve lift .450”
Trans. Speeds: 4
Drivetrain Level 2 preparation only.
Listed spec line weight does not change with alternate or stock transmission.

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Alternate intake manifold, with narrowed balance tube to fit 1275cc head, permitted with use of 1.5” SU carbs (original P/N’s
12H708, 12H1398, 12H2568)."
In HP Spec Lines, Austin-Healey Sprite Mk I, II, III, IV MG Midget (ALL), change Drivetrain Notes as follows:
"(2) 1.25” SU w/ no modifications
(2) 1.5” SU w/ no modifications (on alternate manifold)
Valves: (I) 33.0/(1.30) (E) 29.5/(1.16)
Comp. ratio 12.0:1, Valve lift .450”
Trans. Speeds: 4
Alternate intake manifold, with narrowed balance tube to fit 1275cc head, permitted with use of 1.5” SU carbs (original P/N’s
12H708, 12H1398, 12H2568)."

2026-07-01 HP 1996-2000 Honda Civic (CX, DX, VP, LX) with Engine Code D16Y7

#40322 from Thomas Beverly · Rule change · TB 26-07 (2026-07 Fastrack)

neutral1996-2000 Honda Civic CX/DX/LX with D16Y7 engine newly classified in HP.

In HP, classify Honda Civic CX/DX/LX (96-00):

2026-07-01 HP 1275 Midget/Sprit Alternate intake manifold E/O

#40370 from Production Committee · Rule change · TB 26-07 (2026-07 Fastrack)

neutralHP Sprite/Midget 1275 allows MG-B alternate intake manifold with 1.5" SU carbs; balance tube shortening and flange modification permitted.

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

2026-07-01 HP HP Honda Civic (92-95)

#40464 from Production Committee · Rule change · TB 26-07 (2026-07 Fastrack)

fasterHP Honda Civic DX/LX (92-95) wheels widen to 15x7, weight drops to 2350 lbs.

In HP, make the following changes to the "Honda Civic DX (92-95)" spec line:
Spec Line Name: "Honda Civic DX/LX (92-95)"
Wheels: "~~13x7~~ 15x7"
Wheelbase: "2/ 4 door: 2621/(103.2) 2/3 door: 2573/(101.3)"
Weight: "~~2420~~ 2350"

2026-08-01 HP Mini Cooper Compression Ratio

#40517 from Brian Linn · Rule change · TB 26-08 (2026-08 Fastrack)

fasterHP Mini Cooper 02-06 compression ratio increases from 10.6 to 11.0:1.

In HP Spec Lines, Mini Cooper (02-06) (includes 05-08 convertible), change Drivetrain Notes as follows:
"Comp. ratio ~~10.6~~ 11.0:1, Valve lift .450”

Applies to Mini Cooper on this page: Robert Bax, Leanna Wright

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