NHRA Funny Car icon Jim Dunn honored with NHRA Lifetime Achievement Award
Toyota wins its first NHRA Manufacturers Cup championship
NHRA Mission Foods Drag Racing Series champs honored at awards ceremony
Tony Stewart named 2024 NHRA Rookie of the Year
In Memoriam
Unofficial Mission Foods points standings
Greg Anderson joins exclusive company with sixth NHRA Pro Stock title
Antron Brown secures fourth Mission Foods NHRA Top Fuel world championship
Funny Car world champ Austin Prock makes fastest run in NHRA history
Gaige Herrera locks up second straight Pro Stock Motorcycle championship
In-N-Out Burger NHRA Finals Sunday preview
Austin Prock clinches first Funny Car world championship in dominant fashion
Saturday News and Notes from the In-N-Out Burger NHRA Finals
U.S. Army veteran, mother receives life-changing car gift at NHRA Finals
Cody Lane and Cody Webber clinch NHRA Lucas Oil Series titles in Pomona
DHL, Kalitta teams join forces to provide 2 million meals in “Race To End Hunger”
In-N-Out Burger NHRA Finals Friday preview
Zurn Elkay and Mainline Sales join Krista Baldwin for NHRA Finals
Shell Roofing Solutions Group covers Funny Car driver Jason Rupert in Pomona
Paul Lee enters NHRA Finals with a new look from Mainline Sales Inc.
NHRA to honor veterans during weekend-long celebration in Pomona
Hull to finish rookie Funny Car season in iconic Mooneyes/Jim Dunn Racing entry
Factory Stock ace Stephen Bell to make NHRA Pro Stock debut in 2025
Final odds released for NHRA Mission Foods Top Fuel, Pro Stock championships
There's still time to enter 2024 NHRA Sweepstakes featuring big prizes
Sorensen and Fuller clinch Lucas Oil Series Sportsman titles in Las Vegas
Pritchett to make long-awaited Top Fuel debut in Shumake’s dragster in Pomona
FallNationals, JEGS Allstars coverage highlight new National Dragster issue
Prescott Raceway joins NHRA member track family in Division 4
Cornwell Tools will sponsor Austin Prock/JFR Funny Car full time in 2025
NHRA Expertise: The valvetrain secrets of a nitro-burning Hemi
The Hemi engines drag racers know and love get their name from the hemispherical (half of a sphere) combustion chamber that positions their valves 180 degrees from one another. Those monstrous valves are held in place by titanium retainers and steel keepers.
For Nitro Funny Car engines:
Only one cylinder-head design is acceptable: Intake valve angle of 35 degrees, + or - 1 degree Intake valve size maximum: 2.470 inches Exhaust valve angle of 21 degrees, + or - 1 degree Combined intake and exhaust valve size maximum: 4.395 Inches