Originally posted by Batass
How much better do you think they are than a pair of stock vortecs?
Ah ! now it gets interesting. The chevy vortecs are a good head and flow well. At .500 inch lift they will flow 210 CFM with the port in stock form. Now comes the flip side, with the design of combustion chamber these heads flow well in the .400 to .500 lift range, go higher than .500 lift and the chamber shape starts to restrict flow, This is where the SR's are better, because of there better chamber shape they have a better power band with cam lifts over.500 than the vortecs. Butttt.... you will be getting into pretty high valvetrain wear with normal solid lifter cams at those lifts,unless you are using a street roller cam setup.