Quote:
Originally Posted by GotBoost?
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.
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A 4 banger with room to rev stock has more potential. VVT makes a bigger difference since they are already low on torque and gearing makes a big difference in actual performance.
I would go with what the pros are saying on N/A vs FI, anything past boltons and FI makes far more sense per dollar.