EP at Indianapolis Motor Speedway

2019-03-01 EP Request for Competition Adjustment for 2nd Generation RX7

#25935 from Tony Jimerson · Rule change · TB 19-03 (2019-03 Fastrack)

In EP, Mazda RX-7(12A/13B)(79-85), change the weights as follows:

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

2019-04-01 EP Rollcenter Correction Clarification

#25873 from Bill Lamkin · Rule change · TB 19-04 (2019-04 Fastrack)

Note from CRB: 9.1.5.E.5.b.2 in “Suspension and Steering Level 2: Suspension Components”
states that “Suspension control arms, bushings, bearings, and ball joints are unrestricted.”
However, allowance to ream out ANY tapered hole from a stock ball joint does not exist, unless
being done to a specifically unrestricted component, like a suspension control arm. This is not
the intent to restrict in that manner, and should be clarified:
In GCR section 9.1.5.E.5.b.2, add wording as follows:
“Suspension bushings, bearings, and ball joints are unrestricted. Tapered holes can be drilled
or reamed, to allow a bolt to be used in place of a ball joint.”

2019-04-01 EP Hardtops

#26476 from Production Committee · Rule change · TB 19-04 (2019-04 Fastrack)

In GCR section 9.1.5.E.9.a.12, remove wording as follows:
“Open cars must remove convertible soft tops, and attaching bracketry and fasteners. Open
cars retaining the stock windshield may retain the stock removable hardtop if attached to
the car by positive fasteners. 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.”
In EP, remove wording from spec line notes as follows:

2019-05-01 EP Allow Firewall Modification for Fitment of 13B into RX8

#26726 from Production Committee · Rule change · TB 19-05 (2019-05 Fastrack)

In EP, Mazda RX-8 (04-11) (alternate), add to notes as follows:
“Firewall may be modified as necessary for fitment of 13B into stock chassis engine mount
location. Firewall must be sealed in the area of the modification.”

2019-08-01 EP Request Miata Eligibility - 2003

#27121 from Gary Rose · Rule change · TB 19-08 (2019-08 Fastrack)

In EP, GCR section 9.1.5., Mazda MX-5/Miata, make changes as follows:
"(99-02 05)"

2019-08-31 EP Request bodywork for Austin Healey Bugeye Sprite MK1

#27106 from Gary Johnson · Rule change · TB 19-09 (2019-09 Fastrack)

In FP, Austin-Healey Sprite Mk I, II, III, IV / MG Midget Mk I, II, III, IV, & 1500, add to the notes as follows:
"Sprite Mk I only may replace exterior rear body work, aft of the cockpit and rearmost door opening, with
stock appearing components of an alternate material."
In HP, Austin-Healey Sprite Mk I, II, III, IV / MG Midget Mk I, II, III, IV, Prep 1, 948cc, add to the notes as
follows:
"Sprite Mk I only may replace exterior rear body work, aft of the cockpit and rearmost door opening, with
stock appearing components of an alternate material."
In HP, Austin-Healey Sprite Mk I, II, III, IV / MG Midget Mk I, II, III, IV, & 1500, Prep 1/2, 1275cc, add to

2019-08-31 EP Request to classify the GMX5 2019

#27263 from SCCA Staff · Rule change · TB 19-09 (2019-09 Fastrack)

In EP, Mazda MX-5 Global Cup, change the year as follows:
"(16-18 19)"

2019-08-31 EP level one susp. component rule

#27270 from Production Committee · Rule change · TB 19-09 (2019-09 Fastrack)

In Production, GCR section 9.1.5.E.4.e., change wording as follows:
"Suspension Spindles, hubs, bushings, bearings, and ball joints are unrestricted."

2019-08-31 EP Clarification of Carb Rules - Prep 1

#27300 from Production Committee · Rule change · TB 19-09 (2019-09 Fastrack)

In Production, GCR section 9.1.5.E.1.b., make changes as follows:
9.1.5.E.1.b – Drive Train Level 1, Induction System
“1. 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 of carburetors must not be changed from
stock, unless otherwise specified by the vehicles spec line. All single carbureted cars may fit a permitted
optional carburetor. On cars w Where the use of one (1) 40 DCN, DCNF, IDF carburetor is required
specified, a permitted optional carburetor may be substituted. Permitted optional carburetors are: can fit

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

2019-08-31 EP Clarification of Carb Rules - Prep 2

#27301 from Production Committee · Rule change · TB 19-09 (2019-09 Fastrack)

In Production GCR section 9.1.5.E.2.b.1., make changes as follows:
9.1.5.E.2.b.1., – Drive Train Level 2, Induction System
“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 of carburetors must not be changed from stock, unless
otherwise specified by the vehicles spec line. 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:

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

2019-12-01 EP Re-organize Prep2 Cylinder Head Rules for Clarity & Consistency

#27661 from Production Committee · Rule change · TB 19-12 (2019-12 Fastrack)

In Production, GCR section 9.1.5.E.2.e, delete section and replace as follows:
e. The Cylinder Head can only be modified:
1. To install an alternate camshaft, and/or adjustable cam gears.
2. To port match on the port mating surface to a depth of no more than one inch.
3. To facilitate the installation of permitted alternate components, provided the modification serves no
other function.
4. To achieve the maximum specified compression ratio by the machining of the deck surface.
5. To completely plug the holes resulting from the removal of EGR valves and air nozzles. The plugs must

2020-01-01 EP Request to List Mazda Miata Throttle Body Size

#27907 from STEVE SARGIS · Rule change · TB 20-01 (2020-01 Fastrack)

In FP, Mazda Miata 1.6L (90-97), make changes as follows:
Brakes Std.:
"Factory spec @ all 4 wheels (F) 235 x 18 Vented Disc (R) 231 x 9 Solid Disc"
Throttle body Diameter:
"stock throttle body I.D. 55mm"
In EP, Mazda MX-5/Miata 1.6L (-1993), make changes as follows:
Brakes Std.:
"(F) 235 (9.3) x 18 Vented Disc (R) 231 (9.1) x 9 Solid Disc"

2020-02-01 EP Request for Help for Datsun 1200

#27934 from Ian Sullivan · Rule change · TB 20-02 (2020-02 Fastrack)

In HP Spec Lines, Nissan/Datsun 1200, make changes as follows in Carburetor No. & Type:
"(1) 40 DCN, DCNF, IDF, 26mm choke(s) req’d. w/ 30mm choke(s), (2) auto type side draft w/ 30mm
choke(s) on I.R. manifold."

2020-03-01 EP Request to Review Horsepower Parity

#27662 from Kevin Koelemeyer · Rule change · TB 20-03 (2020-03 Fastrack)

In EP, 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,
alternate throttle body from BMW 92-95 325i (part #13541748105) with Turner Motorsports adapter
plate (part #TEN9990850) is permitted. 59mm Flat Plate Intake Restrictor is required with both stock or
alternate throttle body. Alternate throttle body from BMW 92-95 325i part number 13541748105
permitted only with Turner Motorsports adapter plate part number TEN9990850 to replace drive-by-
wire throttle body."
In EP, BMW Z3 2.8L (97-00), add to the notes as follows:

2020-03-01 EP E36 (92-95) Brakes Errors and Omissions

#28058 from Charles Baader · Rule change · TB 20-03 (2020-03 Fastrack)

In EP, BMW 325is M-Technic (1994), change as follows:
Weight:
"2650 2550
*2716 2614
**2783 2678"
Brakes Std.
"(F) (12.4 x 1.1) 286 vented"

2020-03-01 EP Request to allow 40 DCOE carb for the Datsun 510

#28195 from James Bell · Rule change · TB 20-03 (2020-03 Fastrack)

In HP, Nissan/Datsun PL510, make changes to the spec line as follows:
Carburetor No & Type:
"(1) 40 DCN or, DCNF w/ 32mm choke(s),. 32mm choke(s) req'd, or (1) 36mm DCNVH. (2) auto type side
draft(s) w/ 32mm choke(s) on I.R. manifold @ 90lbs penalty."
Notes:
"Compression ratio limited to 12.0:1, Valve lift limited to .450”. (2) auto type side drafts w/ 32mm
choke(s) on I.R. manifold allowed @ 2050 (*2101 **2153). Nissan/Datsun 240Z/260Z/280Z front rotors
and calipers and rear aluminum drums are permitted."

2020-03-01 EP Add Throttle Body Size these EP BMW Spec Lines

#28422 from Production Committee · Rule change · TB 20-03 (2020-03 Fastrack)

In EP, Fuel Injected Equipped Throttle Body Inside diameter, make changes as follows:
Add "64" as maximum inside diameter and delete any other wording.

2020-04-01 EP Caterham 7 Spec Line

#28498 from Omer Norton · Rule change · TB 20-04 (2020-04 Fastrack)

In EP, modify the "Notes" section of the "Lotus/Caterham 7 America" spec line as follows:
"Level 2 suspension preparation. 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. and f. Comp. Ratio limited to 10.0: 1, Valve lift
limited to .380”."
Note that the "Level 2 suspension preparation" limitation is already mandated by the fact that this is a
"Prep Level 2" classified vehicle. Removal of that wording from the "Notes" section is purely due to
redundancy, and not to change the allowed preparation.

2020-05-01 EP Request to Classify 1990-1994 Mazda Protege

#28381 from Nick Leone · Rule change · TB 20-05 (2019-05 Fastrack)

In FP, Classify the 90-94 Mazda Protege as follows:

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

2020-05-01 EP Error in Mini Cooper Spec Line

#28713 from Frank Schwartz · Rule change · TB 20-05 (2019-05 Fastrack)

In HP Spec Lines, change as follows:
"Mini Cooper (includes convertible) (02-06)
(includes 05-08 convertible)"
In HP Spec Lines, change as follows:
"Mini Cooper (includes convertible) (07-13)
(includes 09-15 convertible)"

2020-06-01 EP BMW Cylinder Head Casting and Part Numbers

#28708 from Bill Lamkin · Rule change · TB 20-06 (2020-06 Fastrack)

In EP, correct the following spec lines as shown:
BMW Z3 2.5L, add to "Notes" section:
"Cylinder head casting number 1738400 permitted with use of the allowed iron block (casting number
1748933-C)."
BMW Z3 2.8L (97-00), modify "Block Mat'l" section:
"Alum or Iron"
BMW 328i/is E36 (96-99), modify "Block Mat'l" section:
"Alum or Iron"

2020-07-01 EP Request to Classify Porsche 911 2.0L

#28456 from Richard Spritz · Rule change · TB 20-07 (2020-07 Fastrack)

In EP, classify the Porsche 911 S (67-68) as follows:

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

2020-08-01 EP EP BMW Z3 Rule Clarification

#28998 from Sam Moore · Rule change · TB 20-08 (2020-08 Fastrack)

In EP, BMW Z3 2.5L, make changes to the spec line as follows:
"Cylinder head casting number 1738400 permitted with use of the allowed iron block (casting number
1748933 or 1738566-C).

2020-10-01 EP 84-87 Toyota Corolla HP Wheel Diameter Allowance Proposal E&O

#29458 from Brian Harmer · Rule change · TB 20-10 (2020-10 Fastrack)

In HP, Spec Lines, Toyota Corolla (84-87), change Wheels as follows:
"13 15 x 7"

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

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

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

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

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

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

2020-12-01 EP Weight Reduction for Datsun Roadster

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

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

Applies to Nissan SRL 311U Roadster on this page: Grayson Upchurch Jr

2020-12-01 EP EP TR8 Adjustment

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

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

Applies to Triumph TR8 on this page: Morey D. Doyle

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

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

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 EP Please Classify Mazda3 in FP

#30165 from John MacGowan · Rule change · TB 21-04 (2021-04 Fastrack)

In EP, classify Mazda 3 S (04-08) as follows:

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

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

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

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

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

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

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

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)"

2021-05-01 EP NC MX-5 year range correction E&O

#30503 from Josh Smith · Rule change · TB 21-05 (2021-05 Fastrack)

In EP Spec Lines, Mazda MX-5 (06-14) change as follows:
"(06-14 5)"

Applies to Mazda MX-5 on this page: Breton Williams

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

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

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"

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

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

In EP Spec Lines, Lotus / Caterham 7 America, change as follows:
Carburetor No. & Type: "IT 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 EP Reclassify Daimler SP 250

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

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 EP Request to Allow F22c Engine for 2000-2003 Honda S2000

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

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 EP Request a review of the S14 240SX in EP.

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

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”."