Quote Originally Posted by aaronng View Post
With cams, you are moving the peak torque upwards the rpm curve. So your engine has to be able to sustain the higher rpm at a higher torque for longer durations than stock. So dropping cams in alone might give you nice peak power for the dyno, using that peak power frequently will shorten engine life. Hence the reason why people also go for uprated pistons, rods, valve springs, retainers etc.
I'd love to try higher compression ratio, should improve the burn, and improve economy if tuned right