Technical Info: Formulas
Gross valve lift is the cam lift multiplied by the rocker ratio.
To figure your cams overlap; add the intake opening event to the exhaust closing event.
Torque x RPM / 5252 = Horsepower
Centerline is the distance in crankshaft degrees from TDC to the center of the intake lobe.
Valve Lift = Lobe Lift x Rocker Arm Ratio (Evo - 1.60, Shovel - 1.425)
Lobe Lift = Valve Lift / Rocker Arm Ratio (Evo - 1.60, Shovel - 1.425)
Distance from Cam Nose to Cam Heel - Base Circle Diameter Lobe Lift
Overlap is the distance in crankshaft degrees that both the intake and the exhaust valves are open (at a specified amount e.g.: .053"), at the same time.
Some parts contained herein may not be legal for sale or use in California on any pollution controlled motor vehicles.
Quality and Performance for Over 40 Years
Copyright © 2001-2016 Rivera Primo all rights reserved Website Disclaimers & Internet Policy