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NHRA To Allow Any Accepted Pro Stock Engine/Body Combo In 2018
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PRI Trade Show exhibitor NHRA (Booth #3415) will allow Pro Stock racers to run any currently approved engine combination in any currently approved body, regardless of the manufacturer, during the 2018 NHRA Mello Yello Drag Racing Series season.
The decision, which was announced this week in a letter to Pro Stock teams, should provide fans with a wider variety of entries in the class, including more Dodge Darts and Ford Mustangs. Chevrolet Camaros have been the bodystyle of choice the last several years.
The other basic rules of the class remain. Body choice must be from a 2009 or later NHRA-accepted 2-door or 4-door coupe or sedan (domestic or foreign) production vehicle. Body, drivetrain, chassis, etc. may not be altered, modified, or relocated, except as outlined in Requirements & Specifications in the Rulebook. Minimum weight at conclusion of run: 2,350 pounds, including driver. Minimum weight on the rear axle at conclusion of run: 1,100 pounds, including driver.
The engine still must be an internal-combustion, reciprocating, naturally aspirated, single camshaft, 90-degree V-8 (i.e., cylinder bank must be at a 45-degree angle from the camshaft/crankshaft centerline, creating a combined 90-degree angle) automotive-type engine with a maximum 500 cid. Aftermarket blocks permitted if designed and cast with OEM approval, and currently accepted by NHRA.
Once an engine is used in a vehicle at an event, that engine cannot be used in another vehicle for the duration of the event. Engine shall consist short block and heads, and will be serialized or otherwise identified at each event.
NHRA also clarified a rule regarding the mandatory fuel-injection units, citing that no part of an injector may protrude above the runner flange into the plenum area.
The decision, which was announced this week in a letter to Pro Stock teams, should provide fans with a wider variety of entries in the class, including more Dodge Darts and Ford Mustangs. Chevrolet Camaros have been the bodystyle of choice the last several years.
The other basic rules of the class remain. Body choice must be from a 2009 or later NHRA-accepted 2-door or 4-door coupe or sedan (domestic or foreign) production vehicle. Body, drivetrain, chassis, etc. may not be altered, modified, or relocated, except as outlined in Requirements & Specifications in the Rulebook. Minimum weight at conclusion of run: 2,350 pounds, including driver. Minimum weight on the rear axle at conclusion of run: 1,100 pounds, including driver.
The engine still must be an internal-combustion, reciprocating, naturally aspirated, single camshaft, 90-degree V-8 (i.e., cylinder bank must be at a 45-degree angle from the camshaft/crankshaft centerline, creating a combined 90-degree angle) automotive-type engine with a maximum 500 cid. Aftermarket blocks permitted if designed and cast with OEM approval, and currently accepted by NHRA.
Once an engine is used in a vehicle at an event, that engine cannot be used in another vehicle for the duration of the event. Engine shall consist short block and heads, and will be serialized or otherwise identified at each event.
NHRA also clarified a rule regarding the mandatory fuel-injection units, citing that no part of an injector may protrude above the runner flange into the plenum area.
