Quote: Let me pose this question a little differently... What would be the result of using a cam with more exhaust duration than was necessary? Obviously, we would have a bit more overlap and contaminated charge but how would the engine react?
I'm curious also. I have heard that certain heads with very good flowing exhaust ports (compared to exhaust) can over-scavenge the cylinder and actually suck a lot of the intake charge into the header, where it continues to burn and overheat the pipes. With some of the intake charge lost, power would be down.
Perhaps over-camming the exhaust would do the same.
