Originally Posted by jgalaxy
What does the dyno say for 17.5 PSI on 94 octane?
I do miss that kind of juice from the 335, but gladly give it up for the balanced M3.
Let's see what next year brings.
Originally Posted by Beemw335
335's run 8psi stock and the rule of thumb on this engine is 12 whp for each psi. So 15 psi( 7 psi increase) would be 84whp over stock. Pretty big difference!
A lo of people run 19 psi on their 335s with meth!
stock boost pressure on the 2.5L 4cylinder from the STi is 14.5 psi!! thats a lot of boost on that little engine. stage 1 tune brings about 17 psi. and the claim is 40hp gain at the crank. havent dyno'd this to verify yet but others have done the same and seems to be true.
so i guess Beemw335 is right, 12whp for each psi is a good rule of thumb.