Quote:
Originally Posted by Stan Weiss
I looked at that post by Harold and say they are not similar cams.
"They were both 288/296 at .020", 255/263 at .050". The flat tappet was 166/173 at .200", .540"/.556" valve lift. The roller tappet was 176/183 at .200", .626"/.626" valve lift. Both cams used .026" valve lash, hot."
"The only real difference is in the shape of the lift curve. Both cams shut the valve on the seat at the IDENTICAL seating velocity."
My question would be how much difference would there be in HP if I put 1.75:1 rocker arms on the flat tappet cam?
Stan
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I did see the lift was quite a bit more. The flat tappet cam could very well pick up some of the lost HP if you put a rocker on it that would increase the lift. How much does a rocker change affect duration if any? Trying to learn more everyday.