OSCRA Rules

*************** Table of Contents ***************

Safety
 1.1 Fire Suits
 1.2 Helmets, Head and Neck Restraints
 1.3 Seat Belts
 1.4 Seat
 1.5 Raceivers
 1.6 Window Net

Engine
 2.1 Engine Requirements
 2.2 Carburetion and Intake
 2.3 Engine Series Matching

Exhaust
 3.1 Exhaust Manifolds and Headers
 3.2 Mufflers and Sound
 3.3 Exhaust Routing

Transmission
 4.1 Drive Type
 4.2 Steering Restrictions
 4.3 Drivetrain Components

ECU (Computer)

Tires and Wheels
 6.1 Wheels
 6.2 Tires

Suspension
 7.1 Suspension Components
 7.2 Shocks and Struts
 7.3 Springs and Limiters

Weight

Steering

Roll Cage

Brakes

Battery

Fuel tanks

Cooling

Oil and Fuel

Cab and Body

********************* General Rules **********************

Rules are written with the spirit of intent. Any questions on interpretation of a rule(s) should be handled before race day. WS Hornet rules may flex on a case-by-case basis at the discretion of OSCRA officials in the interest of good competition. It is the car owner/driver’s responsibility to clear any concerns or issues with the car that will be run at a OSCRA event prior to that event. Not every part and piece can be covered in this rule book. If a part, piece, or modification is not listed in this rule book, it must be presented to OSCRA’s officials prior to a race for approval.

Cars and Trucks allowed- Front wheel drive or Rear Wheel drive. 

NO AWD/ 4WD or converted AWD or 4WD to 2WD allowed.

ALL Cars/Trucks MUST BE Stock Production MODEL YEAR 2005 OR OLDER.

***** 1: SAFETY

1.1 Fire Suits
Fire Suits – A fire-resistant suit designed for auto racing will be REQUIRED at all times that the car is on the track. A one- or two-piece fire-resistant suit is permitted. Fire resistant gloves and shoes are REQUIRED. Fire resistant socks and head socks are HIGHLY RECOMMENDED. The highest quality suits are recommended for all drivers.

1.2 Helmets, Head and Neck Restraints
Helmets, Head and Neck Restraints – Snell rated SA2015 or later helmets are required at all times that the car is on the track. (M rated helmets are not permitted). It is HIGHLY RECOMMENDED that drivers utilize SFI approved helmet skirts, neck and head restraint systems.

1.3 Seat Belts
Seat Belts – Minimum 3-inch-wide, 2-inch shoulder belts are allowed, SFI approved fivepoint safety belts are REQUIRED. Center crotch belt must be used and must be mounted to the roll cage seat mount. All belts must be mounted securely to the main roll cage. Must complete matching set from manufacturer. Recommend replacement after 2 years !

1.4 Seat
Seat – A professional racing seat is required. Seat must be mounted with a minimum of 3/8-inch grade 5 bolts. No fiberglass, plastic or homemade seats are allowed..

1.5 Raceivers
Raceivers are mandatory. No 2-way radios permitted.

1.6 Window Net
Window Net – Rib style or mesh is required. Must be permanently mounted at the bottom and have an approved quick release at the top. Must be in good condition.

***** 2: ENGINE

2.1 Engine Requirements
Must be naturally aspirated gasoline engines. No turbo, No rotary etc. Four (4) cylinder engines only. Stock type fuel injection.

2.2 Carburetion and Intake
Any 500-cfm carb allowed. 1” spacer allowed. Stock appearing intake manifolds. Aftermarket or racing air filters, and air filter ducting parts are legal.

2.3 Engine Series Matching
Engine and engine series must match make car/truck. Ex. Honda that came with a “D” series engine cannot run a “B” or “H” series engine. A pinto can run a 2300cc engine and not a ztech motor.

***** 3: EXHAUST

3.1 Exhaust Manifolds and Headers
Aftermarket exhaust manifolds and headers are legal.

3.2 Mufflers and Sound
No requirements for specific catalytic converters/mufflers. Cars must run a muffler and maintain a 95db at 100 feet rating.

3.3 Exhaust Routing
Exhaust must exit behind driver. Exhaust cannot be aimed at fuel tank. Exhaust pipes must be secure and may not extend past the body of the car.

***** 4: TRANSMISSION

4.1 Drive Type
Front or rear wheel drive cars only. No AWD or 4X4 allowed.

4.2 Steering Restrictions
No four-wheel steering allowed* No converted AWD or 4X4.

4.3 Drivetrain Components
Aftermarket Clutch, Flywheel and Torque Converters and parts are permissible. No racing transmissions. Factory gear changes are permissible. Locked, welded or LSD allowed.

***** 5: ECU (Computer)

5.1 ECU Modifications
Computer may be chipped and/or tuned. Ignition coils must remain OEM however the coilonplug kits are allowed.

***** 6: TIRES/WHEELS

6.1 Wheels
Racing wheels are legal. No bead lock wheels. Max wheel width 7in. Wheel spacers are NOT allowed.

6.2 Tires
Any DOT Street legal tire permitted. No grooving, checking, crosshatching or any other tread modifications is permitted. No Hoosier Tires. No Racetrack and Auto Cross Only tires. Tires can be a 60,65,70 or 75 series tire- no 50 or 55 series tires allowed. Tires can be mixed and matched for stagger.

7: SUSPENSION

7.1 Suspension Components
Cars and trucks must maintain stock like suspension parts or use direct O.E. replacements. Reinforcement of suspension components and mount points are allowed. Upper control arm Camber adjusters/ball joints are allowed.

7.2 Shocks and Struts
Shocks/Struts must be stock or OE replacement. No racing shock/Struts. No adjustable shocks/Struts.

7.3 Springs and Limiters
Spring adjusters (Coil Overs) are NOT allowed. Limiting straps or spring compressing devices are NOT allowed. Spring rubbers (rubber or plastic) may be used in between spring coils, BUT NOT at the top or bottom of the spring.

***** 8: WEIGHT

8.1 Minimum Weight
All Cars must weigh 2300 pounds or more with driver. Car weights can be checked before, during, and after each race.

***** 9: STEERING

9.1 Steering Components
Steering rack must be stock or stock replacement. Steering shaft from rack to steering wheel may be altered. Electric power steering ok. Steering wheels may be changed, and quick release devices are allowed.

***** 10: ROLL CAGE

10.1 Roll Cage Construction
The roll cage must be constructed of 1.5 or 1.75 inch outside diameter tubing with a minimum wall thickness of .095 inches. Six-point cage required consisting of a four-point center section and two “kicker” bars from the top of the main cage to the rear of the car welded securely in or near the strut tower area. (Center section to consist of main roll bar with cross brace as close to floor as possible and cross brace shoulder high. Halo bar must be above driver’s head with helmet on and buckled into car. Front down posts must have bar between them above steering column in front of dash.) Minimum three door bars on driver’s side. Minimum two bars in passenger door. Steel plates will be installed on outside of driver’s side door bars, concealed inside car body. Roll Cages will be inspected by OSCRA staff before cars are allowed on track. Unsafe cages will not be allowed to race.

10.2 Driver Protection Plate
**Drivers side steel plate 3/16 in thick to cover driver’s seating area (exact measurements to follow)

***** 11: BRAKES

11.1 Brake Components
Stock brakes and brake components are acceptable. Upgrades to brake drums, lines, rotors, pads, and calipers are acceptable, but they must use stock master cylinders, and associated components.

***** 12: BATTERY

12.1 Battery Mounting
Batteries may maintain stock location. Batteries must be held down with stock clamps, or metal hold down straps, with a rubber cover over the positive post. Batteries may be relocated inside driver’s compartment. Relocated batteries must be mounted securely with rubber covering the positive post, in a contained sealed box. Non spillable batteries are highly recommended.

***** 13: FUEL TANK

13.1 Fuel System
The fuel system can remain stock provided the fuel tank is in the stock position. Fuel cells may be used. If a fuel cell is used it must be mounted securely in between the rear strut towers area of the car with a firewall installed to seal off the fuel cell from the cab of the car. A fuel shut off switch wired to an oil pressure switch is required for electric fuel pumps not equipped with stock shut off relays.

***** 14: COOLING

14.1 Cooling System
Aftermarket radiators are allowed but must be in or near stock location. Radiator mounting may be reinforced. Reasonable radiator protection is allowed. Any type of fan switch is allowed. Coolant type -WATER ONLY Water Wetter and other additives/lubricants can be added to the water. NO ANTIFREEZE

***** 15: Oil and Fuel

15.1 Fluids
Any regular pump gas is allowed. E85 and 110 permissible. No Methanol. Any engine oil and transmission fluid are allowed.

***** 16: CAB/BODY

16.1 Cab and Body Requirements
All glass and flammable material must be removed from the cab and body. Dash may be removed if desired. All external plastics and lights must be removed. Slight body sheet metal improvements may be made. Extra driver’s side door sheet metal may be added. No bars to extend past factory bumpers. Bars may be placed behind leading side of front bumper, and behind trailing side of rear bumpers. Bumpers must not have any sharp edges or be capable of hooking other cars. Bumper plastics (covers) must be installed with extra supports to prevent bumper covers from being torn off during racing. At a minimum, one metal bar must be installed in the windshield opening area. Any sharp edges or supports that stick out from the car must be moved for safety. Hood latch should be disabled and removed, with quick pull pins installed. Wind shield area visors and metal mesh is allowed and encouraged. Car bodies should resemble stock appearance.

Similar thickness factory thickness size sheet metal should be used for sheet metal repairs. Rear cab side window openings may be blocked off with sheet metal.

***** 17: CLAIM RULE

No Claims in the OSCRA Series. This does not mean you are not subject to local track claim rules, if you are running for points at that track.

***** OSCRA RESERVES THE RIGHT TO MODIFY OR CLARIFY THESE RULES AT ANY TIME IN THE INTEREST OF FAIR AND COMPETITIVE RACING. *****e.