Match Race 1972 ~ 'Road Runner/GTX 440' vs. 'Buick GS 455'
1972 440/290 HP
NHRA Re-Factored....... 335 Horsepower
Compression................. 8.75 - 1
Pistons......................... Flat Top
Height.......................... {-.123} Below Deck
Cylinder Head............... #3462346
Production.................... Flame Hardened Seats
Intake Valve.................. 2.08 " Intake
Exhaust Valve................ 1.74" Exhaust
CFM Flow 'Intake'.......... 198 CFM @ .500" Lift
CFM Flow 'Exhaust'........ 151 CFM @ .500" Lift
Combustion Chamber.... 88.0 CC {Factory}
Combustion Chamber.... 82.0 CC {NHRA Minimum}
Camshaft {Hydraulic}
Lift................................ .467" Intake / .483" Exhaust {NHRA Specifications}
Duration........................ 268* Intake / 284* Exhaust
Overlap.......................... 46*
Valve Springs.................133 lbs. {Valve Closed} ~ 250 lbs. {Valve Open}
Intake Manifold............. #3614014 {Cast Iron}
Carburetor.................... Holley ~ #6254 {Manual} ~ #6255 {Automatic}
Series........................... #4160
Throttle Size................. 1.563" Primary ~ 1.750 Secondary
CFM Rating................... 670 CFM
Exhaust........................ 2.50" Primary Pipe
Ignition........................ Electronic