NHRA Announces Rule Changes for Pro Mod Class

Mar 13, 2020

The NHRA E3 Spark Plugs Pro Mod Drag Racing Series will feature numerous rule changes during its 20th season as a part of NHRA competition, the sanctioning body has announced, including a new engine combination.

The ProCharger centrifugal supercharger and large displacement (960-cubic-inch) nitrous engines are now legal. There are now five distinctly different engine combinations for racers to choose from including the current turbocharger, supercharger and small (909-cid) nitrous engines.

The NHRA has also eliminated grade points, event quotas and pre-entry regulations, which means that any licensed Pro Mod driver who wishes to enter a race may do so right up to the entry deadline (typically Monday before the start of the event).

Additional changes include:

  • Fresh air breathing system now mandatory
  • Transmission case and lines must be fully enclosed in a tunnel constructed of aluminum, steel, or carbon fiber
  • Any front-end body part made with carbon fiber must be covered with SFI 54.1 flame retardant coating.
  • A 60psi normally open-air switch must be installed to prevent the car from starting if system air pressure is below 60psi.
  • Window net must release with a quick lock and or spring-loaded mechanism.