Rocky Mountain Division SCCA

SPEC RX7 Rules

Effective January 1, 2007

(Changes are noted in bold type)

I. GENERAL

The class was conceived with the intention that costs be kept low while allowing close racing. To this end, the rules will be vigorously enforced at all SCCA-sanctioned events. The rules are absolute --- they are not intended to be a guide to car preparation. Unless specifically mentioned or approved in these rules, no additional vehicle modifications may be made. Any sections referring to the GCR or the IT/CS rules that has been affected by an updating of those books, the most current versions of the GCR & IT/CS rule books apply.

II. MAKE OF CAR

Mazda RX-7, 1981-1985; G, GS, or GSL trim-level models are eligible.

III. PREPARATION RULES

All vehicles will remain Showroom Stock, as defined by SCCA General Competition Rules (2002 GCR Sec. 17.1.3 and continued in Showroom Stock Category Specifications) except for the following specifically required and/or allowed modifications; Minimum weight- 2425 lbs., with driver. Per GCR, all drivers should have a Mazda Factory Shop Manual based on the VIN# for the car they are driving.

A. ALLOWED REPLACEMENT PARTS

Many of these items are available from Mazda Competition Parts at 800-435-2508. All drivers should register with them in order to purchase Mazda Original Parts at a discount.

1. SHOCK ABSORBERS:

Brand:Tokico High Performance Gas

Model:Front #HZ-1 069, Rear #HE-231 7

Notes:Non adjustable, blue body

2. SWAY BARS

Brand: Suspension Techniques

Model: (3-054 OLD NUMBER) 52170 is the current part number as of 2001

Notes: Front: 1 1/8”, fixed; Rear: 5/8”, adjustable. (Note: In the rear you may use

the allowed replacement Suspension Techniques sway bar, any 1981-1985 12A

model Rx-7 stock sway bar or no sway bar at all.)

3. SPRINGS

Brand: TMC

Model: CSM-400 “Street/Race”

Notes: Blue or Black color

4. AIR FILTER

Brand: K&N

Model: E-2700

B. TIRES

Brand: Toyo (Spec Tire)

Model: RA1 205/60R13

Notes:Must have “ToyoTire” designations on front and both sides of vehicle to be eligible for Toyo contingency. Contact Vilvan Tire at (888) 775-8646 for ordering tires, decals. Contingency forms will be available online at www.teamtoyo.com.

C. SAFETY EQUIPMENT

1. Safety rules (seatbelts, window net, fire extinguisher) as per SCCA GCR sections 17,18 and 20. All other safety items as per I.T.C.S. rules Sections. 17.1.4.D.10.a.1-5, b, d-j

2. Roll cage: Brand: Autopower Model: 83591 RX (1-3/4” ERW or 1-1/2” DOM material) Notes:Material and construction defined by the SCCA GCR Sec. 18.2.

3. All cars must use specified roll cage that shall not be modified, except for mounting gussets, a window net, seat belt mounting brackets and will only be bolted in place.

a. Early model roll cages must be modified to adhere to GCR 18.2.4.A, full horizontal bracing.

b. Outer dash vent louvers may be removed for roll cage clearance where needed.

4. An electrical master (“kill”) switch is required. See GCR section 17.27., for requirements

D. INTERIOR

1.The following interior components may be removed:

a. A/C system (but not the heater core, blower or heating controls

b. Carpeting, carpet padding and sound deadening tar/mastic may be removed from the floorboard, cargo area (including storage bins) and spare tire well.

c. Center consoles/armrest may be removed. Cars must retain factory console around gear shift

d. Cargo bins

e. Driver’s seat belt

f. Passanger seat belt may be removed or replaced with racing belts that meet requirements for driver’s seat belts in Section 20 of the SCCA GCR.

g. Floor mats

h. Radio system, including antenna, speakers, amplifiers and wiring

i. Headliner

j. Dome lights

k. Grab handles

l. The ashtray and cigarette lighter

m. Sun visors luggage straps

n. Spare tire, jack and tools must be removed for racing

o. Emissions control unit and mounting/covering plate from passenger foot-well.

p. Other than to provide for the installation of required safety equipment or other authorized modifications, no other driver/passenger compartment alterations or gutting is permitted. Removal or substitution of driver/passenger compartment panels is prohibited.

2. The driver’s seat must be replaced with a seat suitable for competition per Showroom Stock rules. The passenger’s seat may be replaced with any seat suitable for competition, including a racing type bucket seat. If not replaced, the passenger’s seat may be removed. If either seat is replaced, associated factory seat tracks/brackets may be modified, reinforced and/or removed to facilitate replacement mountings provided they perform no other function.

3. Driver and passenger door glass may be removed along with window operating mechanism. If window glass is retained, aluminum interior door panel or original door panel must be used.

4. The heater control panel must remain intact and unmodified. Heater and blower need not be functional.

5. The stock interior mirror may be replaced with any after-market unit suitable for competition. Additional mirrors may be added provided they are fully contained within the passenger compartment.

6. Gauges and instruments may be added or replaced. They may be installed in the original instrument(s) location using a mounting plate(s) or any other location using a secure method of attachment. Other than modifications made to mount instruments and provide for roll cage installation, the remainder of the dash “board: or panel shall remain intact.

7. Steering wheel, locks must be disabled, after market steering wheels and quick release kits may be used.

8. Ducting may be added to provide fresh air to the driver and passenger compartment. This ducting shall be located in the driver and/or passenger window area with no modifications to the bodywork.

9. Video cameras are permitted provided they are mounted in accordance with the GCR.

10. If ballast must be added to bring the car up to minimum weight, it must be securely fastened to the floor per GCR.

11. The interior trim panels located behind the driver and passenger doors may be removed.

12. After-market pedals (clutch, brake, gas) may be mounted on the existing pedal assemblies.

13. After-market shifter knobs are permitted.

14. Painting of the interior is allowed.

E. EXTERIOR

1. Cars may be repainted in non-factory colors.

2. Any exterior mirrors may be used, provided they are fitted in the stock location.

3. Fender openings may be modified for tire clearance per ITCS Section 17.1.4.D.8.a.

4. Emblems and side moldings may be removed

5. Hood pins and windshield clips may be added per ITCS Section 17.1.4.D.8.d.

6. The radio antenna may be removed. The remaining hole must be covered.

F. ENGINE

1. Any 1979-1985 carbureted 12A rotary engine may be used.

2.All engine electrical components must remain stock and unmodified, with the following specifically allowed modifications:

a. Any spark plugs may be used.

b. Any brand of spark plug wires may be used of 9mm diameter or less, providing they are of the original single-wire resistance type and do not include external grounding wires or any means of charge or spark boost.

c. Ignition coils may be replaced with any coils that will mount in the stock location.

d. Ignition timing is free up to a maximum of 10 degrees.

e. Distributor must remain unmodified.

3. Engine and drivetrain lubricants are free.

4. Cooling system must remain operable and unmodified, with the exception of the following specifically allowed modifications:

a. Radiator may be replaced with a larger unit of the same type and material as the original, and must mount in the original, unmodified location.

b. 1983 and later cars may use the earlier oil cooler system, providing

the early radiator is used.

c. 1981 and 1982 cars may use the later oil cooling system, providing the

later radiator is used.

5. Stainless steel braided oil lines may be used for oil cooler.

6. A screen may be installed in front of the radiator and oil cooler to help prevent stone damage.

7. Air conditioning, cold start assist system, and cruise control components in the engine compartment may be removed. No other modifications to the heating/cooling ventilation system may be made.

8. Fuel system, including tank and filler, must remain unmodified, with the exception of the following specifically allowed modifications:

a. Fuel pumps and fuel pressure regulators are free. Regulators may be installed anywhere in the fuel delivery line to the carburetor. Replacement fuel pumps must be mounted within 12” of the original location.

b. The fuel tank return line shall remain as stock and shall not be used for fuel delivery to the carburetor.

c. The stock fuel-return check valve and fuel tank rollover valve may not be modified, bypassed or removed.

d. Any fuel filter(s) may be used

e. Simple heat shielding over the OEM rubber style fuel lines in the engine compartment is allowed as long as they are easily removable for inspection.

9.Carburetor must remain stock and unmodified except for the following specifically allowed modifications:

a. “Grose Jet” carburetor needles and seats may be used in place of stock carburetor needles and seats, providing the replacements are of identical size to stock.

b. The shutter-valve system may be disabled, however the shutter-valve butterfly may not be removed or modified.

10. Electrical charging system must be functional and operating as per manufacturers

specifications.

11. Any battery may be used that fits in the original OE location.

12. A Cool Can may be installed. Moroso Part #65125. Cool Can may be obtained from JEGS Auto Supply at 800 CALL JEG. The Cool Can is not intended to provide a competitive advantage.

G. EXHAUST

1. Racing Beat header, part number 16010- for 81-83 cars and 16012 - for 84-85 cars may be used.

2. Any emissions components may be removed.

3.The main catalytic converter may be removed, gutted or replaced by any EPA or C.A.R.B. approved after-market converter.

4. Exhaust must follow the stock routing (over the axle), and must exit from the stock location and extend to the rear bumper.

5. Maximum outside diameter for exhaust pipe is 2-1/8” O.D.

6. A muffler is not required, but all vehicles must meet sound standards per SCCA GCR Section 12. Any muffler may be fitted as long as the inlet and outlet diameter is no larger than 2 ¼" O.D. and tailpipe diameter is 2 1/8" O.D. Max.

7.The upper and lower exhaust system heat shields may be removed.

H. Drivetrain

1. Any stock style pressure plate and disc may be used, provided the replacement is the same weight or greater as original.

2. All vehicles not originally equipped as such may be fitted with the entire rear-end assembly from a GSL model (disc brakes and limited slip differential).

3. The differential ratio must be 3.9:1, using stock 81-85 Mazda RX-7 factory gears.

4. No modifications to the stock differential are allowed.

5. The stock wheel lug-bolt system may be replaced with wheel-studs and nuts.

6.Transmission must remain stock.

I. BRAKES

1. Any brake pad material or brake fluid may be used.

2. Braided steel brake lines may be used.

3. Adjustable brake-bias valves are allowed and may be installed in addition to, or as a replacement of, the stock valve, but must be installed in the engine compartment and must not be driver adjustable from the cockpit.

4. If rear disc brakes are installed on a vehicle not originally equipped with rear disc brakes, the master cylinder and proportioning valve from a disc-brake car may be installed. Otherwise, the brake master cylinder must remain unmodified.

5. Front brake dust-shields may be modified or removed.

6. Brake cooling is allowed per ITCS Section 17.1 .4.D.6.b. A duct of 3” maximum diameter may be used for brake cooling. Brake ducting in front lower panel of ‘81-’83 cars may be opened to dimensions of ‘84-’85 cars.

7. The plastic inner fender panels may be removed or modified.

8. Parking brake may be removed or disabled

J. SUSPENSION

1. Upper strut mounting holes may be slotted for increased camber/castor. Upper center strut locating hole may be modified to facilitate strut movement. Stock strut hat must be used and cannot be modified for clearance.

2.All suspension bushings must remain stock and unmodified, with the following exceptions:

a. Urethane front control arm bushings (Energy Suspension part #11-3101) may be used.

b. Urethane strut rod bushings (Energy Suspension part #11-7101) may be used.

c. Rear axle bump stops may be modified, removed or replaced.

d. Stock rear sway-bar end links may be replaced with Energy Suspension part#9-8123.

e. Front suspension rubber coil spacers may be removed.

3. A maximum of two spacers (Mazda part #1011-34-013) may be added per side to the front strut assemblies for weight balancing.

4. One stayrod may be added for chassis stiffening between the front upper strut towers per ITCS Section 17.1.4.D.5.d.5.

5. Minimum ground clearance measured at the front cross-member shall not be less than 4 1/2”.

6. Front wheel negative camber shall not exceed 1-1/4 degrees. No adjustments are allowed to the rear axle.

7. Any brand of 13” diameter wheel — alloy, stock factory or steel — up to 7” wide maybe used.

a. Wheel back spacing must be 4”.

b. Minimum weight for wheel, tire, and lug nuts is 26 lbs.

8. Wheel spacers may not be used.

K. UPDATING and BACKDATING

1.Exterior body parts, interior trim, engine, drive shaft and rear axle may be

exchanged or replaced with another of years 1981 to 1985, 12A model vehicles.

2.Any component updating or backdating must be done as an entire unit.

L. “NO TOUCH RULE”

1. The following components, or any part thereof, may not be modified, detailed or massaged in ANY way:

a. Engine (including intake or exhaust ports and all internal moving or stationary parts)

b. Transmission

c. Carburetor (except as allowed in Section 3.F.8).

d. Drive pulleys.

M. ONBOARD DATA ACQUISITION SYSTEM

1.Onboard lap timing, lap counting or data acquisition systems may be fitted to the vehicle and used during any practice, qualifying or race session.

2.On board video recording is allowed.

3. Radio communication may be used