without knowing what springs you have on there it's impossible to say for sure but that's mighty tall lift no matter what. Your power curve runs flat right at 4800 which is telling me that you have an airflow issue probably in the intake manifold. With that much cam you should see the power continuing to climb well above 4800rpm.
I'm going to go with float or bounce as a potential issue as well as suggesting you might want to look at the intake as a point of restriction. If the intake weren't some sort of restriction (and the valves are being moved without bounce or float) then your power curve should go up from 4800 to 5400 or so... in theory.
|