Originally posted by na200whp
NO . explain to me how at 8000 rpm the valves on longer turn in sync w/ the crank? if the car stops making power at 8000rpm its not due to the cams inability to open and close fast enough or often enough its because there is not enough air flow to support additional hp.according to your logic adding a bigger cam will in some way help the valves open and close faster even though it will have high lift and longer duration.
If your cam profile is set to run at 8k rpm and fall off then after that your intake volume isnt sufficiant enough to sustain any higher rpms due to the frequency of the cam duration and how fast the cams open surpase what the engine can consume in air volume. its like takeing short deept bretahs like hyper ventilating sorta. it cant suck anymore air in becuase the frequency is set for lower rpms. Longer duration and a higher lift will be able to open longer at rpm making it possible to increase the intae volume. If you use a stock cam profile at that high of an RPM you just suphocating the engine. so really there is no need to rev higher than what a oem cam is designed for. Understand what im saying ? but usually at that high of an RPM youll just get valave terminal velocity and you start floting valves because a spring cant keep up with the rpms.