Originally Posted by
632 Regal
k....what a cam does is change the dynamic compression at a different time compared to the stock cam...not static compression. You could in theory change to a larger lift cam with the same timing and get higher static compression at a slightly higher RPM range. If you went with a larger lift cam with more duration it would make more power at a higher RPM but you will sacrifice lower RPM power. This kind of discussion could go on forever. What you want to do is the most important aspect than just sticking in a bigger bumpstick. Usually if you go with a higher lift and duration cam it will tend to run better at higher ropms, so if thats whats going to happen the rest of the package will have to be tuned for that modification such as higher compression, larger valves, free flowing exhaust, stronger valve springs that wont bottom out from higher lift etc etc etc.... At that point you can concider the larger intake manifold.