|
Granted I have never swapped cams out in a 4cyl (only done it on an LS1) but depending on how aggressive you go on an LS1 you can see 20-60HP gains easily. So you will have to excuse me if I don't understand how you can only expect a 15hp gain from cam's and an exhaust.
Also a quick google search tells me that in a 2.5RS with an aggressive cam you can see an increase of around 50whp in a bolt on car. Throw in some heads with that and your looking at around 80whp.
Your also not even considering tuning the motor.
|