POWERADE SERIES
NATIONAL EVENTS
  2005 Schedule
  2004 Results
  2005 TV Schedule
  2004 Points Standings

LUCAS OIL SERIES
DIVISIONAL EVENTS
  2005 Schedule
  2004 Results
  2004 TV Schedule
  2004 Point Standings

TEAMS
  Driver Profiles
  Driver Fan Clubs

BECOME A MEMBER
  NHRA Membership
  Jr. DRAGSTER

INSIDE THE NHRA
  Official Sponsors
  Contingency Sponsors
  The Basics (Tutorial)
  NHRA Museum
  Hot Rod Reunions

RACING INFORMATION
  2004 Rule Revisions
  Class Indexes
  National Records
  Classification Guides
  Engine Blueprints

MULTIMEDIA
  Movies
  Photo Gallery
  Photo of the Week
  Sportsman Photos

MEMBER TRACKS
  Track Directory
  Member Track Programs

NHRA NEWSSTAND
  National DRAGSTER
  Jr. DRAGSTER

COMMERCIAL CLASSIFIEDS
  Performance Directory
  Dragmart (For Sale)

MEDIA SECTION

NHRA STORE

HELP
  Contact NHRA
  Division Directors

The NHRA Technical Department has set standards for engine components in Pro Stock and clarified the limit to spoilers and parachutes in the Funny Car ranks. The rule amendments listed are effective with the Mopar Parts Mile-High Nationals, July 16-18.

Pro Stock Engines:
"All large and all moving engine components (valve covers, intake manifolds, headers, heads, blocks, etc.) are restricted to aluminum, steel, iron, titanium, magnesium, or other conventional alloys. Carbon fiber, Kevlar, ceramics, composites, beryllium, or other exotic materials are prohibited."

Minimum weight requirements have been developed for the following engine components:
Piston - 460 grams
Wrist pin - 135 grams
Connecting rod - 480 grams
Intake valve - 90 grams
Exhaust valve - 80 grams

"Material for intake and exhaust pushrod, and valve springs are limited to steel. All other materials prohibited. Roller bearings limited to cam bearings, cam thrust bearings, lifters, and rocker arm fulcrum and valve spring tip. Conventional sleeve rod and main bearing mandatory."

Funny Car spoiler:
Many of today's Funny Cars have the ability to adjust the center plane of the spoiler surface vertically to allow for more/or less air to exit the spoiler area. Many teams utilize this action to help defer or add downforce to the rear of the car. The following wording is an amendment to the 2004 NHRA Rulebook:

Spoilers
"Spoiler surface, front and rear, must be a continuous single-curved plane. Any lips, notches, decks, or steps prohibited in the spoiler surface, except for wickers, as currently allowed."

Spillplates
"Spillplates must consist of vertical planes running parallel to the car. A maximum of two additional supports (ribs or plates) will be allowed anywhere between the spillplates, as long as they are in the vertical plane, running parallel to the spill plates."