The information on this webpage is duplicated from Section 28 of the official CACC GCR found HERE. If there are any discrepancies, the official GCR will supersede this webpage.
A. General
- Intent – The Civic Racing Series (CRS) is a proposed race series for the EF/EG/EK or 4th, 5th, and 6th generation Honda Civics spanning from 1988 to 2000. Its purpose is to entice amateur racers into focusing their efforts on minimum car preparation but with maximized racing seat time. This can be accomplished by a comprehensive set of basic rules to ensure a highly competitive series with a modest budget.
- Body Styles – All 1988-2000 Honda Civic Coupe, Sedan, Hatchback and Wagon fitted with USDM/CDM D-series engine and transmission or B16A engine and transmission.
CRX, Del Sol, Acura EL permitted. - Multi-Class
i) D-series Class (CRS-D)
- All vehicles powered by a D-Series powerplant
- Vehicles powered by D-Series powerplant must conform to the CRS D-series classification rules CRS Section 5(a)
- All vehicles must conform to the CACC GCR
ii) B-Series Class (CRS-B)
- All vehicles powered by a B-Series powerplant
- Vehicles powered by B-Series powerplant must conform to the CRS B-Series classification rules CRS Section 5(b)
- All vehicles must conform to the CACC GCR
4. Safety – All cars must comply with CACC GCR safety rules. Roll cages must meet CACC IP category specifications, attaching to the body at no more than 8 locations.
B. Allowable Modifications
- General
Other than those items specifically allowed by the rules, no other part or component may be modified, removed, or disabled. - Body
(a) All chassis and structural repair must be done as closely as possible to the factory specifications. No additional frame strengthening is allowed except where there is a strong historic argument for safety improvement. Body repair must maintain stock contours.
(b) Doors, hatch/trunk, and fenders must be stock or equivalent. Interior fender lips may be rolled for tire clearance. Plastic fender liners may be removed. Hood and hatch/trunk latches and release mechanisms may be modified or removed, and/or retaining pins may be installed. The car must run with hood, doors, exterior side mirrors and hatch/trunk completely closed and secured.
- Hood OPEN
- Side Mirrors OPEN
- REAR fender flares for rust repair permitted
(c) Windshield must be OEM or equivalent glass. Windshield clips are allowed. Door glass and related assemblies may be removed from driver and front passenger doors. Side, rear door (if applicable) and rear glass must remain OEM or equivalent glass.
(d) Taillights and brake lights must be installed and functional. Headlights may be substituted with headlights covers that conform to the OEM headlight shape. Protective headlight covers are allowed, but must be form fitting (e.g. thin plastic film) to each individual light and must not serve to improve aerodynamics. The removal of fog/driving lights, turn signals and side marker lights is permitted; any resulting opening must be covered with a non-ventilating material.
(e) Aerodynamic aids (rear spoiler, side skirts, and flares) are not allowed; except for those OEM. Front spoiler
- Front splitter NOT PERMITTED
- Rear diffuser NOT PERMITTED
- Front spoiler OPEN
- Rear spoiler OEM/OEM style
- Rear lip OPEN
(f) Openings to duct air to the brakes may be modified, but not exceed the original design dimensions. The stock engine undertray may be removed.
3. Interior
(a) The dashboard pad must be retained. Glove box lid and any console component secured entirely to the floor may be removed. Any steering wheel may be used other than a wooden one. Any shift knob may be used. Gauges may be replaced or added. The wiring harness may be removed or modified provided it serves its original purpose. Window, mirror, computer display/switches, and associated wires may be removed. Any locking mechanisms for doors, trunk and fuel filler may be disabled and/or removed. Climate control knobs may be removed or replaced. Hoses, plumbing heater core (including the housing and fan unit) may be bypassed or removed. An auxiliary fan or blower may be added for the expressed purpose of defogging the windshield and/or rear window. Any interior mirror may be used. Air bag systems shall be removed.
(b) The driver’s seat and/or passenger’s seat may be replaced with any other seat. Sun visors, passenger and rear seat and associated hardware, carpeting, insulation, headliner and sunroof trays, interior lamps, radios, speakers and trim panels may be removed. Loose items such as floor mats, tools, spare tire, etc., must be removed.
(c) Interior door and quarter panels, rests and handles may be removed. If removed, such gutting must be done with keeping a nice appearance in mind and leave no sharp or hazardous edges. Functional latch and release mechanisms must remain in front doors, but may be modified or removed from rear doors if applicable.
4. Weight and Ballast
(a) A minimum weight for cars with driver will be honored at all times. Ballast is allowed, but must be located on the passenger floor, aft of the firewall and no further rearward than 1” of the rear stock seat bolt holes of the front passenger seat. Ballast shall be in segments no heavier than 50 lbs., and shall be capable of being removed to be weighed apart from the car. Each segment shall be fastened securely to the floor with a minimum of two (2) bolts, SAE grade 5 or better with locking nuts, with large-diameter, load distributing washers.
5. Engines and Minimum Weight
(a) D-Series Engines
- D15B7 – 102hp/6500rpm 9.2:1/9.5:1 – 1,870lb
- D16A6 – 108hp/7200rpm 9.1:1/9.32:1 – 1,960lb
- D16Y7 – 106hp/7200rpm 9.4:1 – 1,960lb
- D16Y8 – 127hp/7200rpm 9.6:1 – 2,290lb
- D16Z6 – 125hp/7400rpm 9.2:1 – 2,290lb
- NO “Mini-Me” engines. The practice of using a NON-VTEC block with a VTEC head is prohibited. A VTEC block with a NON-VTEC head is allowed.
- Pistons OEM or equivalent, mix and match NOT PERMITTED
- Head gasket 3-piece metal OEM or equivalent
- ARP headstuds PERMITTED
- Milling block not to exceed service limit
- O/S pistons not to exceed
service limit1mm (76mm max oversize) - Crank any D-Series
- Rods any D-Series (ARP fasteners PERMITTED)
- Oil pump any D-Series (porting PERMITTED)
- Oil cooler OPEN
- Oil pan OPEN
- Windage tray OPEN
- Crank pulley OPEN
- Valves OEM
- Valve springs OPEN
- Valve retainers OEM
- Valve cover venting OPEN
- Camshaft OEM
- Cam gear OEM
- Fuel rail OPEN
- Injectors OPEN
- FPR OPEN
- Fuel pump OPEN
- Fuel Tank OEM
- Surge Tank OPEN
- Air filter/intake system OPEN (external feed NOT PERMITTED)
- Intake manifold OEM
- Throttle body OEM
- Phenolic gaskets OPEN
- Swirl Pot OPEN
- Radiator OPEN
- Fans OPEN
- Engine mounts OPEN
- Engine Management OPEN
- Ignition System OPEN
- Ignition wires OPEN
- Battery OPEN
- Header OPEN
- Exhaust OPEN – must fall within dB guidelines set by race track
(b) B-series Engines
- B18B1 – 140hp/6300rpm 9.2:1 – 2,050lb
- B20B – 126hp/5400rpm 8.8:1 – 2,050lb
- B20Z – 145hp/6200rpm 9.2:1 – 2,100lb
- B16A3 – 160hp/7600rpm 10.2:1 – 2,350lb
- B17A1 – 160hp/7600rpm 9.7:1 – 2,360lb
- B18C1 -178hp/7600rpm 10.0:1 – 2,615lb (ITR style manifold PERMITTED)
- B18C5 – 195hp/7800rpm 10.6:1 – 2,865lb
*NO LS-VTEC engines. The practice of using a NON-VTEC shortblock + VTEC head is NOT Permitted.
*NO Cylinder Head swaps, e.g. a B18C1 head cannot be swapped onto a B16A or vice versa. Cylinder heads must match/originate to the shortblock.
*Only the B18C1/GS-R/SiR-G dual plenum OEM manifold may be replaced with an R style single plenum manifold but must retain the OEM throttle-body. NO OTHER B-Series may use an aftermarket or OEM swap intake manifold.
European/JDM or other market variants will be subject to review by the CRS committee. Rule of thumb is power to weight ratio is 14.687 lb/hp.
- Port Polishing/Port matching NOT PERMITTED*-**
- Coatings or treatments NOT PERMITTED
- Pistons OEM or equivalent, mix and match NOT PERMITTED
- Head gasket 3-piece metal OEM or equivalent
- Milling block not to exceed service limit
- O/S pistons not to exceed
service limit1mm (82mm max oversize)
- Crank OEM, NO swapping permitted between models
- Rods OEM, NO swapping permitted between models
(ARP fasteners PERMITTED)
- Oil pump OEM (porting PERMITTED, Oil pump gear OPEN)
- Oil cooler OPEN
- Oil pan OPEN
- Windage tray OPEN
- Crank pulley OPEN
- Valves OEM (No swapping R valves into NON ITR motors/heads)
- Valve springs OPEN
- Valve retainers OEM
- Lost Motion assemblies OPEN
- Valve cover venting OPEN
- Camshaft OEM (No swapping R cams into NON ITR motors/heads)
*No updating/backdating cams for VTEC and NON-VTEC motors
*NO REGRINDS - Cam gears OEM
- Fuel rail OPEN
- Injectors OPEN
- FPR OPEN
- Fuel pump OPEN
- Fuel Tank OEM
- Surge Tank OPEN
- Air filter/intake system OPEN (external feed NOT PERMITTED)
- Intake manifold OEM (18C1/GS-R may swap for single plenum R style manifold)
- Throttle body OEM (must retain factory sized throttle body for selected motor)
- Phenolic gaskets OPEN
- Swirl Pot OPEN
- Radiator OPEN
- Fans OPEN
- Engine mounts OPEN
- Engine Management OPEN
- Ignition System OPEN
- Ignition wires OPEN
- Battery OPEN
- Header OPEN
- Exhaust OPEN – must fall within dB guidelines set by race track
6. Wheels
- 15 in. diameter
- 6 in. minimum width, 8 in. max width
- Offset: OPEN (wheel and tire CANNOT extend past factory body work)
- *Rolling of factory fenders PERMITTED
- *Spacing fenders or over-fenders NOT PERMITTED
Over fenders used to specifically cover/”fix” rust in rear 1/4 panels permitted
7. Tires
Dry – Any 205/50/15 (All Hoosier not permitted)
Wet – Any 205/50/15
8. Brakes
- Brake bias controller is NOT PERMITTED
- Rotor must be 1 piece
- FRONT rotor diameter cannot exceed 282mm/11in.
- FRONT rotor thickness cannot exceed 23mm/0.9 in.
- REAR rotor diameter cannot exceed 262mm/10in.
- REAR rotor thickness cannot exceed 9mm/0.35in.
- REAR rotor CANNOT be vented
- Emergency brake delete OPEN
- Front caliper: Honda OEM or equivalent
- Rear caliper: Honda OEM or equivalent
- [Essentially all above is Type-R spec]
- Brake lines OPEN
- Brake fluid OPEN
- Brake ducts/cooling OPEN
- Brake booster OPEN
- Brake pads OPEN
- Master cylinder OPEN
- Master cylinder brace OPEN
**4 Piston Calipers and/or 2 piece rotors will incur a 75 lb. penalty**
9. Suspension
- *2 way or more adjustable dampers NOT PERMITTED – (*independently adjustable rebound/compression)
- Remote reservoir dampers NOT PERMITTED
- Adjustable rear toe links OPEN
- Bushings OPEN
- FRONT lower balljoint OPEN
- Front and Rear camber kit OPEN
- Rear trailing arm bushing OPEN
- Rear Lower Control Arms OPEN
- Rear roll center correction – OPEN
- Front anti-roll bar OPEN
- Rear anti-roll bar OPEN
- Front, Rear tower bar OPEN
- Front Rear lower braces OPEN
- Subframe collars PERMITTED
- Steering rack quickeners NOT PERMITTED
- Steering arms OEM or equivalent
- Power steering OEM – additional coolers OPEN
- Steering rack OEM or equivalent
Mix and match subframes between generations OPEN
Mix and match knuckles between generations OPEN
Innovative or similar traction bars for EF/DA OPEN
10. Transmission
- NO B to D or D to B transmission swaps
Gears Honda OEM, mix and match NOT PERMITTED- Close ratio gears and/or OEM mix and match OPEN
- Flywheel OPEN
- Bearings OEM or equivalent
- Clutch OPEN (must fit OEM style flywheel)
- Synchros OPEN
- Fluid OPEN
- Final Drive OPEN
- Differential OPEN
- Axles OPEN
- Bushings OPEN
- Shifter OPEN
- Cooler OPEN
11. Updating and Backdating
Chassis of all generations (1988-2000) are permitted to use any engine and transmission of any generation (1988-2000)
12. Racing Numbers and Class Designation
Class designation shall be applied as follows:
All class designations shall comply with CACC GCR rules.
Download printable CRS class files here.
(a) All D-series powered chassis shall display “CRS-D” class designation.
All B-series powered chassis shall display “CRS-B” class designation.
(b) The class designation shall be placed close to the numbers on both sides of the car and shall be at least one-half the size of the numbers. The class designation shall also be placed on the rear of the car and shall be at least 4″ 1.5″ tall.
(c) All D-series powered chasses shall have a Civic Racing Series logo windshield banner. The Civic Racing logo must be white and may not be altered and shall be 5″ tall. The background banner shall be red that spans the entire width of the front windshield.
All B-series powered chasses shall have a Civic Racing Series logo windshield banner. The Civic Racing logo must be white and may not be altered and shall be 5″ tall. The background banner shall be blue that spans the entire width of the front windshield.
(d) The vehicle’s minimum weight (in pounds) shall be displayed on the roof panel above the driver-side door in contrasting colors with a minimum of 1.5″ tall numbers.
Download printable CRS class files here.