BoP Lab / Buttonwillow Raceway Park

FE + HP at Buttonwillow Raceway Park

No mapCal Club 2023

This track has been raced on 4 configurations (The Circuit, 2.57 mi; 1.83 mi; 3.02 mi; 19, 2.92 mi). Laps on different configurations are not comparable, so only events on the 2.57 mile layout are shown; switch above to see the others.

FE has no laps in the events chosen. It ran at Super Tour Apr 2019, Super Tour Apr 2018, Super Tour Apr 2017: add those events.

Pos	Car	Driver	Class	#	Lap	Theoretical	Qual	Race	5-lap stint	Consistency	Trap	S1	S2	S3
1	MG Midget	Bill Okell	HP	7	1:40.295 B-P	1:40.261	2:07.503 B-Q1	2:04.195 A-R2	2:04.781 A-R2	+2.144 A-R2	116.4 B-P	27.543 B-P	28.857 B-P	43.861 B-P
2	MG Midget	Lee Fleming >115%	HP	00	2:03.082 B-R1	2:00.418	2:05.170 A-Q1	2:03.082 B-R1	2:04.295 A-R1	+1.090 A-R1	126.2 A-R2	30.556 A-Q1	35.463 B-R1	54.399 A-R1
3	MG Midget	Brian Linn >115%	HP	48	2:03.551 A-R1	2:03.219	2:04.965 A-Q1	2:03.551 A-R1	2:04.243 A-R1	+0.928 A-R1	121.0 A-R1	33.172 A-R1	35.274 A-R1	54.773 A-R1
4	MG Midget	Noel Hayward >115%	HP	2	2:04.870 B-R2	2:04.711		2:04.870 B-R2	2:10.679 B-R1	+4.104 B-R1	99.2 B-R2	33.577 B-R2	36.471 B-R2	54.663 B-R2
5	Toyota Yaris	Bobby Beyer >115%	HP	18	2:08.224 B-R2	2:08.010	2:10.927 B-Q1	2:08.224 B-R2	2:09.636 B-R2	+2.098 B-R2	92.3 B-R2	34.660 B-R2	37.206 B-R2	56.144 B-R2
6	Mini Cooper	Tom Tuttle >115%	HP	42	2:09.238 B-R2	2:08.416	2:11.042 B-Q1	2:09.238 B-R2	2:10.173 B-R1	+1.249 B-R1	99.0 B-R2	34.631 B-R1	37.306 B-R1	56.479 B-R2

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

Sectors

S1 SF → IM1 0.65 mi
S2 IM1 → IM2 0.75 mi
S3 IM2 → SF 1.17 mi
Spd In → Out 0.03 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
MG Midget	HP	4	1:40.295Bill Okell	2:04.965Brian Linn	2:03.082Lee Fleming	126.2Lee Fleming	27.543Bill Okell	28.857Bill Okell	43.861Bill Okell
Toyota Yaris	HP	1	2:08.224Bobby Beyer	2:10.927Bobby Beyer	2:08.224Bobby Beyer	92.3Bobby Beyer	34.660Bobby Beyer	37.206Bobby Beyer	56.144Bobby Beyer
Mini Cooper	HP	1	2:09.238Tom Tuttle	2:11.042Tom Tuttle	2:09.238Tom Tuttle	99.0Tom Tuttle	34.631Tom Tuttle	37.306Tom Tuttle	56.479Tom Tuttle

The best any driver of each car managed across the selected events, with who set it. Spellings and model years of the same car are grouped; click a row marked ▸ to see each version. Grouping is worked out from the names, so tell us if two cars are wrongly merged or split.

Rule changes between these events

Cal Club 2022 → Cal Club 2023 2022-02-17 to 2023-02-24

2022-03-01 HP Weight Change for Competition Adjustment

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

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

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

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

faster · weightFord Mustang 94-98 weight reduced to 2550/2614/2678 lbs; 99-03 3.8L classified EP at 2700/2768/2835 lbs.

As printed in Fastrack

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)

slower · inductionEP BMW Z3 2.5L intake restrictor reduced from 59mm to 58mm flat plate.

As printed in Fastrack

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)

added · tyres & wheelsEP, FP, HP Improved Touring cars may use any DOT-approved tyre as defined by 9.3.45.

As printed in Fastrack

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)

engineEP Mazda RX-8 13B carburetor option replaced with fuel-injected throttle body or stock fuel injection.

As printed in Fastrack

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)

wordingEP, FP, HP Production clarify idle control valve options: stock original allowed, removable with blocked ports, or mechanical replaced with electronic stock type.

As printed in Fastrack

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)

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)

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

As printed in Fastrack

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)

addedBMW 128i (08-13) classified in EP at 2700 lbs minimum with 2996 cc engine, stock throttle body, 11.0:1 compression and 0.400" valve lift limits.

As printed in Fastrack

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)

added · aeroEP, FP, HP open cars now allow carbon fiber hardtops if they retain OEM exterior profiles.

As printed in Fastrack

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)

wordingEP Subaru BRZ title updated to include model years 13–20; Toyota 86/Scion FR-S title likewise updated to 13–20.

As printed in Fastrack

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)"

2022-06-01 FE Update FE/FE2 Tire Rule

#32613 from Robey Clark · Rule change · TB 22-06 (2022-06 Fastrack)

In FE, GCR section 9.1.1.I.2.M, change as follows:
"Tires must be run as delivered in sets of 4 as stated below:"

2022-06-01 FE Master cylinder clarification

#32669 from Club Racing Board · Rule change · TB 22-06 (2022-06 Fastrack)

In FE, GCR section 9.1.1.I.2.K.c, change as follows:
"Master cylinders ~~must be the Girling type~~:
Girling F front master cylinder is .700" piston diameter, Part # WM802005
Girling R rear master cylinder is .750" piston diameter, Part # WM802006"

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)

addedVolkswagen New Beetle 2.5L 5-cyl DOHC classified in EP at 2400–2520 lbs with fuel injection.

As printed in Fastrack

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)

added · inductionEP Mazda RX-7 12A/13B and 13B now permit 2 bbl fuel injected throttle body with 42mm chokes on dual-y manifold.

As printed in Fastrack

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)

wordingEP VW Corrado 92-95 stroke corrected to 90.3 mm and displacement to 2792 cc.

As printed in Fastrack

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"

2022-09-01 FE Engine Heat Shield & Insulation

#33019 from Robey Clark · Rule change · TB 22-09 (2022-09 Fastrack)

In FE, GCR section 9.1.1.I.2.G.a.17, change as follows:
"A heat shield and heat insulation material may be used between the engine block and the exhaust system and is recommended
for the purpose of protecting hoses, shifter cable, and wiring from the heat of the engine and exhaust. Heat insulation material
may also be used to protect the fuel cell, fuel filter, fuel rail, and fuel lines."

2022-10-01 FE Brake bias adjuster clarification

#33084 from Robey Clark · Rule change · TB 22-10 (2022-10 Fastrack)

In FE, GCR section 9.1.1.I.2.K, add the following:
"f. Driver adjustable manual brake bias is allowed."

2022-10-01 FE FE Front and Rear Wing Update & Clarification

#33089 from Robey Clark · Rule change · TB 22-10 (2022-10 Fastrack)

In FE, GCR section 9.1.1.I.2.F.g, change as follows:
"The front wing ~~main plane, front wing secondary elements, front wing support mounts, and front wing endplates~~ assembly and
its related mounting components must be used ~~and mounted~~ as delivered ~~from Enterprises~~. ~~Any m~~ Modifications ~~to these parts~~,
except as specifically noted ~~herein~~, ~~is strictly forbidden~~ are prohibited. The front main ~~wing plane angle is zeroed on the rear~~
~~upper aft transmission surface measured with a suitable angle gauge, i.e.: digital level on the top main plane 2 inches outward~~
~~from the nose box mounts~~ element may be adjusted +2.5 to -0.5 degrees. ~~It must meet a minimum measurement of negative .5~~
~~degrees (angled down in the back) and a maximum measurement of positive 2.5 degrees (angled up in the back). It is acceptable~~
~~to shim the main plane to obtain this measurement.~~ Shimming 2 of the 4 verticals through the main element mounting points to

Show 29 more lines

achieve adjustment range is allowed. The main element angle is measured relative to the reference plane. The main element is
checked on the upper surface, midway between the vertical mounting and outer secondary elements on both sides. Note: The
reference plane is the machined surface where the shock clevises are attached to the transmission case. Secondary wing
elements may be used in any of the provided adjustment holes. Gurney flaps (0.500" +/- 0.030") are ~~permitted~~ allowed as an
option ~~for installation on the trailing edge upper surface of the front wing~~ on secondary elements only~~, not the wing main~~
~~plane~~. ~~They~~ Gurney flaps must be securely attached ~~in a secure fashion, without modification to the wing element except for~~
~~mounting hardware. Only .500” +/- .030” flaps are allowed. Maximum number of mounting locations on front flaps is 2 on each~~
~~flap and maximum hardware size is~~ with two #8 ~~(.156)~~ hardware or tape. Gurney flaps~~, where attached, shall be~~ are bent or
formed 90 degrees to have a sharp inner radius~~and parallel to the upper surface of the wing element and~~. ~~no t~~ Tapered or "saw-
toothed" Gurneys flaps are not permitted. Gurney flaps are measured for total height as mounted from the upper surface of the
element."
In FE, GCR section 9.1.1.I.2.F.h, change as follows:
"The rear wing assembly and its related mounting components ~~are to~~ must be used ~~and mounted~~ as delivered. ~~Any~~
m Modifications, except as specifically note~~dherei~~ n, are ~~strictly~~ prohibited. The lower ~~plane angle, zeroed on the rear upper aft~~
~~transmission surface, measured with a suitable angle gauge. i.e.; digital level on the top surface of the lower rear wing must~~
~~meet a minimum of –3.0 degrees (angled down in the back) and a maximum of +2.0 degrees (angled up in the back). It is~~
~~acceptable to adjust the lower rear element to meet these requirements~~ element may be adjusted +2.0 to -3.0
degrees. Chamfering the upper inner corners of the wing mounting brackets to achieve the adjustment range is allowed. The
element angle is measured relative to the reference plane. The element is checked on the top surface, near the center, without a
Gurney flap. Note: The reference plane is the machined surface where the shock clevises are attached to the transmission
case. The upper ~~rear wing~~ element may ~~only~~ be adjusted within the ~~parameter~~ profile of the wing endplate~~s and wing adjusters~~
~~as provided from Enterprises~~ using any of the provided adjustment holes. ~~No additional holes may be added.~~ Gurney
flaps (0.250" +/- 0.030") are ~~permitted~~ allowed as an option~~for installation on the trailing edge upper surface of the~~ on one or
both wing elements. ~~They~~ Gurney flaps must be securely attached ~~in a secure fashion, without modification to the wing element~~
~~except for mounting hardware. Only .250” +/- .030” flaps are allowed on one or both elements~~ with five #8 hardware or
tape.~~The~~ Gurney flaps ~~only, may extend beyond the parameters of the end plate~~ are bent or formed 90 degrees to have a sharp
inner radius. ~~Maximum number of mounting locations is 5 and maximum hardware size is #8 (.156). Gurney flaps, where degrees~~
~~and parallel to the upper surface of the wing element and no t~~ Tapered or "saw-toothed"
Gurneys flaps are not permitted. Gurney flaps are measured for total height as mounted from the upper surface of the element."

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)

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)

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

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

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

wordingEP, FP, HP port matching limited to 1 inch depth from mating surface.

As printed in Fastrack

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."

Cal Club 2023 → Cal Club 2025 2023-02-24 to 2025-02-22

2023-04-01 FE Update FE SADEV Transmission Rule

#33883 from Robey Clark · Rule change · TB 23-04 (2023-04 Fastrack)

In FE, GCR section 9.1.1.I.2.G.b.4.b, change as follows:
"~~(All SADEV ratios are under review and could be updated prior to sealing date)~~"

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

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

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)

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)~~”

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

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

wordingFP and HP Sprite and Spitfire 1500 intake valve size corrected to 36.6 mm, removing prior decimal specifications.

As printed in 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)"

2023-09-01 HP Larger chokes

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

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."

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

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

slower · weightEP Porsche 944/924S combines 2.5L and 2.7L variants (83-89), raises weight to 2250–2415 lbs, allows 2681cc displacement.

As printed in 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 HP FP and HP Toyota Corolla

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

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”

2023-12-01 HP Weight Reduction for Mazda 626

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

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)

faster · weightEP Triumph GT6 minimum weight drops to 1800 lbs.

As printed in Fastrack

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)

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

2024-01-01 FE Update FE Rain Light Rule

#34707 from Robey Clark · Rule change · TB 23-09 (2023-09 Fastrack)

In FE, GCR section 9.1.1.I.2.N.f, change as follows:
"~~Any rain light is allowed.~~ Effective 1/1/2024, a rain light that meets FIA Standard 8874-2019, Technical List No. 76, is required as
specified in GCR section 9.3.32.B.2."

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

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

slower · weightEP BMW Z3 2.5L minimum weight increased to 2500 lbs, 2563 lbs with power adder, 2625 lbs with two power adders.

As printed in Fastrack

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)

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)

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

2024-01-01 HP Miata Alternate Head

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

faster · weightEP Mazda MX-5 1.8L (90-97) minimum weight cut to 2150 lbs; (94-97) variants to 2000, 2050, 2100 lbs.

As printed in 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 HP Triumph GT6 Adjustments

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

slower · weightEP Triumph GT6 dual 1.75-inch carburetors weight rises to 1940 lbs; triple Weber 40 DCOE option added at 1990 lbs.

As printed in 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 FE FE/FE2 rule update

#35269 from Robey Clark · Rule change · TB 24-01 (2024-01 Fastrack)

In FE, GCR section 9.1.1.I.2.P.c, add the following:
"Racer's tape may be used to repair crash damage, or as a precautionary means of securing the body panels or
retaining l~~atches~~ fasteners only. Crash-damage is defined as having occurred during the current event, and the tape should be of
an appropriate color if possible. Taping of body seams is not allowed. Taping across heat exchanger openings as a way to control
temperature is allowed and may serve no other purpose."

2024-01-01 HP Honda S2000 throttle body

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

faster · inductionEP Honda S2000 fuel injected throttle body inside diameter increases from 62mm to 64mm.

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

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

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)

wordingEP Triumph TR8 dry sump allowance moved from Carburetor line to Notes.

As printed in 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 HP Correction to EP 924S/944 Spec Line

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

weightEP Porsche 944/924S 2.5L and 2.7L minimum weights corrected: 2479cc to 2306–2363 lbs, 2681cc to 2358–2415 lbs.

As printed in 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.

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

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

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

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)

faster · weightHP Honda Civic 1.5 1988-91 minimum weight drops 70 lbs to 2175; also 2-speed and 3-speed minimums cut 72 and 73 lbs.

As printed in Fastrack

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)

removedHP removes four redundant VW spec lines: Rabbit Cabriolet 1780, Scirocco 1588, Scirocco 1780 8-valve 83-88, Scirocco 1588.

As printed in 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

2024-05-01 HP Replace plastic panels

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

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)

addedNissan 300ZX 84–89 added to EP, 2550–2678 lbs, 2960 cc SOHC, fuel injection, 12.0:1 compression, 0.500" valve lift limit.

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

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

addedMazda RX-7 92-97 added to EP Prep as Level 2 rotary 13B 6-port, 2200–2310 lbs, carb or fuel injection, 42 mm choke.

As printed in Fastrack

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)

removed · cars addedEP Mazda RX-8 (04-11) alternate spec line removed; single spec line retained.

As printed in 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 HP Errant entry in HP production line item

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

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

As printed in 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 FE Hoosier Tire Decal Placement

#36435 from Robey Clark · Rule change · TB 24-08 (2024-08 Fastrack)

In FE, GCR section 9.1.8.I.2.M, add the following:
"b. Hoosier FE/FE2 Decal Placement:
Five (5) "Hoosier" decals are required in the following locations: One (1) small "Hoosier" decal on the nose or the front shock
cover of the car. One (1) 12" "Hoosier" decal on the outside vertical plane of each front wing plate. One (1) 12" "Hoosier" decal
on the vertical plane of each of the lower floor panels just in front of the rear wheels. Hoosier decals are available, free of charge,
from all Hoosier tire distributors and SCCA Enterprises."

2024-09-01 FE 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 FE Update on Letter 36620 with new Hoosier Contingency Decal Info

#36625 from Robey Clark · Rule change · TB 24-09 (2024-09 Fastrack)

In FE, GCR section 9.1.1.I.2.M.b, change as follows:
"~~Five (5) "Hoosier" decals are required in the following locations: One (1) small "Hoosier" decal on the nose or the front shock~~
~~cover of the car. One (1) 12" "Hoosier" decal on the outside vertical plane of each front wing plate. One (1) 12" "Hoosier" decal~~
~~on the vertical plane of each of the lower floor panels just in front of the rear wheels. Hoosier decals are available, free of~~
~~charge, from all Hoosier tire distributors and 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."

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

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

faster · engineHP 1275 Spridget compression ratio raised to 12.0:1; 1098cc also raised to 12.0:1.

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

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

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 FE Brake Line to A-Arm Covers

#37110 from Robey Clark · Rule change · TB 24-12 (2024-12 Fastrack)

In FE, GCR section 9.1.1.G.2.K, add the following:
"g. If used, SCCA Enterprises Part # WM803010 Brake Line to Control Arm covers must be used as delivered and must be securely
fastened with zip ties/tie straps or tape. Part # WM803010 is the only approved part and may serve no other purpose."

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)

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: Tom Tuttle

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)

faster · weightEP BMW 325i/is E30 84-91 weight reduced to 2150 lbs base, 2204 lbs with turbo, 2258 lbs supercharged.

As printed in Fastrack

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)

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

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

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

slower · inductionEP BMW models now require flat plate intake restrictors: Z3 2.5L 52mm, Z3 2.8L 55mm, 328i E36 58mm, 328i/ci E46 58mm, 325i E46 56mm, 325i E36 56mm, 325is M-Technic 56mm.

As printed in 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."

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

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

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

addedEP, FP, HP may use any interior or exterior mirror meeting rule 9.3.36.

As printed in 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 HP HP Class Adjustments

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

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)

faster · weightEP Honda S2000 1997cc minimum weight drops 75 lbs to 2375; 2157cc drops 60 lbs to 2450.

As printed in 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 HP Mazda 1999 Miata 1.8L

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

faster · weightEP Mazda MX-5 Miata 99-05 minimum weight reduced to 2100 lbs, 2153 lbs with power, 2205 lbs modified.

As printed in 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 HP MINI Cooper (07-13) Spec Line Correction: Errors and Omissions

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

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"."

Applies to Mini Cooper on this page: Tom Tuttle

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

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

addedChevrolet Spark 16-22 classified in HP Pre at 1850 lbs base, 1896 lbs modified, 1943 lbs.

As printed in 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 HP Request to Lower Ford Festiva Minimum Weight to 1600 LBS

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

faster · weightHP Ford Festiva 88-93 minimum weight lowered to 1600 lbs, competition weight to 1640, prepared weight to 1680; compression ratio raised to 11.0:1.

As printed in 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”."

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

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

faster · weightHP Fiat X-1/9 and Bertone 1500 minimum weights reduced to 1740 lbs, 1784 lbs, 1827 lbs; 1300 models to 1600, 1640, 1680 lbs; additional 1300 and 1500 specs to 2010, 1900 lbs.

As printed in 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 HP BMW Z4 update

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

slower · inductionEP BMW Z4 03-05 gains 52mm flat plate intake restrictor.

As printed in Fastrack

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)

faster · weightEP Fiat 124 Spider Competition 1600 and 2000 minimum weight drops 50 lbs to 2000; carburetors now allow 36mm chokes instead of 34mm.

As printed in 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."

2025-09-01 FE FE & FE2 Rule Updates

#38901 from Robey Clark · Rule change · TB 25-09 (2025-09 Fastrack)

Effective 9/1/25 in FE, GCR section 9.1.1.G.1.A, change as follows:
"Definition
~~FE’s with the Mazda 2.0L MZR engine will be classed as “FE2” and will use the class designation FE2. The Mazda 2.0L MZR motor~~
~~can be used in all SCCA events. It shall run under all FE Preparation rules except as noted below:~~
~~a. 2.0L MZR may be run with an Elite 5SPD or a Complete SADEV 6SPD transmission Kit~~
~~Must use the following:~~
~~b. 2.0L only Intake Manifold Part # WM30106~~
~~c. Throttle Body Part # WM591930-Jenvey~~

Show 19 more lines

~~d. PE ECU Kit Part # 1192012~~
~~e. Nippon-Denso Alternator Part # WM902127~~
~~f. Oil Filter Adaptor Part # WM301050 & Oil Filter Part # G301022~~
~~g. PCV Valve Part # WM391502~~
~~h. The car shall weigh 1270 lbs. minimum, including the driver.~~
~~i. 16” MAZDA logo on each side of the engine cowling and the Mazda wing & name logo on the front center of the nose cone.~~
~~These are mandatory decals.~~
~~j. 2.0L MZR required Spark Plug Part# ND ITV 24~~
Formula Enterprises cars "FE" with Mazda 2.0L MZR engine are classed as "FE2." FE2 is the primary class in all SCCA events and
must run under all FE Preparation rules except as noted below:
Mandatory items
16” MAZDA logo, each side of the engine cowling, Mazda wing logo, front center of the nose cone.
Table 2 (Spec Line Cars)
Car Engine
Wheel
Width
(in)
± .060
Aero Transmission Weight Notes

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

2025-10-01 FE FE & FE2 Bubble Tail

#38978 from Robey Clark · Rule change · TB 25-10 (2025-10 Fastrack)

In FE, GCR section 9.1.1.G.2.F.k, change as follows:
"Enterprises bubble tail P/N: WM138014 is allowed for FE and is the only configuration for FE2."

2025-10-01 HP 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 HP 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 HP 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 HP 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 HP 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 HP 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 HP 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 HP 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 HP 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 HP 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~~

Show 3 more lines

~~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)

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)

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)

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)

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)

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 FE FE & FE2 Rule Updates

#39484 from Robey Clark · Rule change · TB 26-01 (2026-01 Fastrack)

In FE, GCR section 9.1.1.G.2.G.a.1, add the following:
"NO MODIFICATIONS ARE ALLOWED EXCEPT WHERE SPECIFICALLY AUTHORIZED WITHIN THESE RULES. This includes all fuel
injection and engine management components, including exhaust, cooling, electrical and lubrication systems. All systems are
subject to test procedures and must conform to OEM / SCCA Enterprises specifications as stated and supplied by Enterprises. All
fluids, except fuel, are unrestricted."
In FE, GCR section 9.1.1.G.2.T, add the following:
"If a competitor refuses to give their engine and/or unlabeled parts for testing per a request of the Class Compliance Chief (CCC)
or Chief Steward, the following penalties will automatically be imposed:"

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In FE, GCR section 9.1.1.G.2.T.d, add the following:
"The car and drivetrain are suspended from competition until the unit(s) specified by the CCC or Chief Steward are replaced."
In FE, GCR section 9.1.1.G.2.T, add a new section as follows:
"g. Any drivetrain part found to be out of spec, during voluntary or involuntary inspection, will constitute a Drivetrain Violation.
Penalties may be assessed post event."

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

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

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)

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)

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"

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