cam guru question?

[lghtnin33]

if a cam spec.is ground to a certain duration and lift, and you use a higher than spec. rocker ratio will your power band change, because of lift off of cam lobe?

[crmax]

yes it will move up the rpm range, how much depends on the lift and rocker ratio among other things

[Infomaniac]

I believe duration has more effect on RPM range. You can change the duration with valve lash on solid cams.

[bajaruner]

Changing lift will change the overall power of the engine, more lift will give you more overall in most cases. Changing duration and lobe center have more to do with a powerband change. More duration, the powerband moves up, less duration the powerband moves down. This is a very complex area of nowledge if you are unsure about changing your valve train, give your cam manufacturer a call, and tell them what your up to, they will tell you if it will help, or hurt your performance, and work with your cam.