305 Sprint Car Engine Rules

Introduction

305 sprint cars are a type of open-wheel race car that are powered by a 305 cubic inch (5.0 liter) V8 engine. They are one of the most popular classes of sprint cars in the United States, due to their relatively low cost of operation and high level of performance. 305 sprint cars are typically raced on dirt tracks, and they are known for their high speeds and dramatic side-by-side racing.

The rules for 305 sprint car engines are designed to keep the class competitive and to ensure that the cars are safe to race. The rules are set by the World of Outlaws, which is the governing body for sprint car racing in the United States. The rules are updated annually, and they can vary slightly from track to track. However, the general rules for 305 sprint car engines are as follows:

Engine Specifications

• The engine must be a 305 cubic inch (5.0 liter) V8 engine.
• The engine must be naturally aspirated (no turbochargers or superchargers allowed).
• The engine must use a carburetor.
• The engine must have a maximum compression ratio of 12.5:1.
• The engine must have a maximum camshaft duration of 270 degrees.
• The engine must have a maximum valve lift of 0.600 inches.

Fuel System

• The fuel system must use gasoline.
• The fuel tank must be a maximum of 20 gallons.
• The fuel pump must be mechanically driven.

Ignition System

• The ignition system must use a distributor.
• The ignition coil must be a maximum of 50,000 volts.
• The spark plugs must be a maximum of 0.050 inches.

Exhaust System

• The exhaust system must use a muffler.
• The exhaust pipes must be a minimum of 2 inches in diameter.
• The exhaust system must not exceed 95 decibels.

Cooling System

• The cooling system must use a radiator.
• The radiator must be a minimum of 16 inches wide.
• The cooling system must use a water pump.

Electrical System

• The electrical system must use a 12-volt battery.
• The electrical system must use a starter.
• The electrical system must use an alternator.

Safety Equipment

• The driver must wear a helmet.
• The driver must wear a fire suit.
• The driver must wear a head and neck restraint system.
• The car must have a roll cage.
• The car must have a fire extinguisher.

Inspection

• All cars must be inspected by a World of Outlaws official before each race.
• The inspector will check the car’s engine, fuel system, ignition system, exhaust system, cooling system, electrical system, and safety equipment.
• Any car that does not meet the rules will be disqualified from the race.

Penalties

• Any driver who violates the rules may be penalized by the World of Outlaws.
• Penalties may include fines, points deductions, or suspension from racing.

Conclusion

The rules for 305 sprint car engines are designed to keep the class competitive and to ensure that the cars are safe to race. By following these rules, drivers can help to make 305 sprint car racing a safe and exciting sport.