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Originally Posted by bokey
I have been hearing the same thing as nj85z28 has. Â*I have been doing my research, but still do not understand how just switching out the cam shaft increases preformance. Â*I thought you would have to switch/rebuild the heads, replace the rockers, put in new pisonts, rings, etc. to get a real preformance gain from the cam shaft. Â*Maybe I am just missing something (and I'm pretty sure I am lol). Â*Could you help me out with this one?
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The camshaft determines how quickly your valves open (ramp rate), how much they open (lift), and how long they stay open (duration).
The stock cam usues very conservative designs to make the car idle smooth and keep clean emmisions. A properly chosen aftermarket cam will allow more air and fuel into the cylinder and allow better evacuation of the burned air and fuel out of the cylinder. This is how you make more power.
- Justin