Vintage Drag Racing Association
Flathead Inline Class Rules
Safety:
• All vehicles must meet NHRA safety requirements for speed and elapsed time.
• All vehicles must pass a track inspection before competing.
Body:
• Permitted vehicles include the following: Hot Rods, Gassers, Roadsters, Altereds, Front Engine Dragsters, Rear Engine Dragsters and Factory Production vehicles pre-1972.
• The Race Master has FULL discretion in determining if a vehicle is qualified to compete or not.
Suspension and Drivetrain:
• NO Air, electronic or timer devises are allowed in the operation of shifting the vehicle. Must be shifted by the driver.
• Trans brake and line lock are allowed.
• Any transmission is allowed.
Engine:
Flathead engines permitted: Straight 4-6-8 cylinder and Flathead V-8 engine block configurations. Ardun and Aluminum heads are permitted.
•Inline engines permitted: Straight 4-6-8 cylinder engine block configurations. Must be a pushrod driven engine. No Overhead Cam configurations permitted. Aluminum, Wayne and specialty cylinder heads permitted.
•Superchargers up to 14-71 are permitted. Turbo chargers are permitted.
•Any intake manifold is permitted.
•Carburetor and mechanical fuel injection ONLY. Electronic Fuel Injection will NOT be permitted.
•Nitrous Oxide is NOT permitted.
•Gas and Methanal fuels Permitted. NO Nitromethane permitted.
•Antifreeze or any coolants other than water are not permitted.
Electronics:
Please Refer to the VDRA Electronics Rules and Regulations Page
General Information:
•The Flathead and Inline Class is an engine specific class. The diversity in vehicles allowed in this class makes it one of the most interesting classes in the VDRA.