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This division has specific rules about engines, components, bodies, etc. Pro Modifieds can either be raced on 1/4 mile or 1/8 mile tracks. Usually, the NHRA races Pro Mod cars on the 1/4 mile, resulting in high 5 to low 6 second passes, while the PDRA races strictly on 1/8 mile track setups, allowing for high 3 second-to low 4 second passes.
Bracket racing is a form of drag racing that allows for a handicap between predicted elapsed time of the two cars over a standard distance, typically within the three standard distances (1/8 mile, 1,000 foot, or 1/4 mile) of drag racing.
A safety requirement on all Drag cars running 9.99 and quicker in the 1/4 mile is the fireproof engine blanket that surrounds the engine block and contains debris in case of an engine explosion. NHRA rules call for a monetary, points, and time penalty if the car leaks oil during the run.
Drivers 14-20 can race in Jr. Comp, where racers are limited to 6.900 at 109.99 MPH. Drivers who are 9 as of January 1 can participate in either the 8-9 or 10-12 category once they turn 10 during the year, and drivers who are 12 as of January 1 can participate in the 10-12 or 13-17 category once they turn 13 during the year.
NHRA pro stock engines are restricted to a maximum 500 cu in (8.2 L) single-camshaft, 90-degree V8. Several bodies have different rules. "Mountain Motors", run by the PDRA (eighth-mile) and at selected NHRA events in 2019, do not have a 500-cubic inch rule, with some engines exceeding 800 cu in (13.1 L), to upwards of 1,000 cu in (16.4 L).
Juniors run as follows: 12.90-slower for 8-9 year olds, 10-12 year olds at 8.90, and 13-18 year olds 7.90 and slower at a top speed of 85 mph). These cars race at 1/8 mile or 1/16 mile. NHRA new class for Juniors is JR COMP running 6.90s at a top speed of 110 miles per hour (180 km/h) (1/8 mile or 1/16 mile).
1/4 mile: NHRA Camping World Drag Racing Series: GALOT Motorsports Park: Benson: North Carolina: 1957: Asphalt: 1/8 mile: George Ray's Dragstrip: Paragould: Arkansas: 1961: Concrete: 1/8 mile: Great Lakes Dragaway
Super Comp (or Quick Rod) is the fastest of the heads-up Super classes (8.90 index). Super Comp is composed primarily of dragsters. Engine, chassis and body modifications are virtually unlimited, though all entries must adhere to NHRA or IHRA safety standards. Four and six-cylinder-powered entries may have a minimum weight of 1,000 pounds; all ...