Originally Posted by OMARS67
I didn't want a smaller cam because I hated running out of power. Yeah normal street was great but freeway was not impressive. Maybe it was my combo at the time. But .560lift on a 454 wasn't very impressive. Fun on the street but didn't pack a punch maybe a jab
You always want to shoot for lift in the 25%-35% of valve size. So .5 is just about right for a 2 inch valve. Yours are almost .2 bigger so .6 is perfect. .7 would still not be out of range. Less and the valve is a restriction in the intake track.
With small chevy the valve size of .6 is all you ever need with 2.02 valves for the most part. But big chevy can have a much larger valve and will need the lift to work correctly. lower lift will still run but it will not get effecient like it should at the cams VE rpm range. If that makes since. Sorry i know i left about three books worth of info out of that one. LOL