HendrickCars.com to sponsor Brittany Force, JFR starting at 4-Wide Nationals
Expanded Total Seal team going after four-wide double victory in Charlotte
AMKUS Rescue Systems to continue as Official Rescue Tools of NHRA
Summit Racing Equipment renews as title sponsor of NHRA Jr. Drag Racing League
Vote for NHRA U.S. Nationals in USA Today's best motorsports event poll
Jonathan Johnson joins NHRA as South Central Division Director
Ida Zetterström continues testing ahead of official NHRA Top Fuel debut
Tony Schumacher to be inducted into Motorsports Hall of Fame of America
Austin Prock goes behind the scenes at All Elite Wrestling 'Dynamite' show
Tim Erdmann named NHRA Vice President Of Finance
NHRA Movers and Shakers; Pomona, Phoenix coverage highlight new issue
In Memoriam
NHRA returns to Chicago for Gerber Collision & Glass NHRA Route 66 Nationals
Drag and Drive exhibition returns to NHRA national event at Route 66 Raceway
Unofficial Mission Foods points standings
NHRA set to celebrate 70th anniversary of historic U.S. Nationals in Indy
The Holley EFI Factory X era officially dawns in Las Vegas
Friday News & Notes from the NHRA 4-Wide Nationals
Jim Dunn Racing and Buddy Hull roll out KGC Funny Car for Vegas event
NHRA 4-Wide Nationals Friday preview
BAM Weather unites with NHRA to provide event weather data, forecasting
Super Grip named title sponsor of Thunder Valley Nationals in Bristol
Second straight sellout at Firebird Motorsports Park for Arizona Nationals
Despite broken leg, Caruso looking forward to future Pro Stock return
Pro Stock and Pro Mod will run three sessions on Saturday in Phoenix
NHRA stars sound off on the chance to win multiple times this weekend
Virginia NHRA Nationals to feature three qualifying sessions on Saturday in shift to two-day event
Jim Dunn Racing and Buddy Hull to rep USD at Arizona Nationals
NHRA returns to Firebird Motorsports Park for NHRA Arizona Nationals
Top Fuel champion Doug Kalitta will fly SealMaster colors in Phoenix
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