[cjperformance]

Originally Posted by KL01

Thanks for the info. I went with a procharger just cause I don't need the instant boost, but in the other hand I don't want "boost lag". Coming from an NA car I am sure I will be impressed. I wonder how much higher I can take the rpms to safely.

I think your bottom end and cam combo will support higher shift points and boost, but it looks like your high side fueling will be your limiting factor. I get 10.5 psi @ 6900 on a p1x w 4.13" pulley. Would like to pulley down a bit and drop the shift points a little.

I dont remember exact numbers but at around 5500 its 8-8.5 psi up to 10.5 psi at shift @ 6900 rpm. So avg boost around 9-9.5. Im thinking 10-10.5 psi avg boost might start hitting high side (LT4) fueling limits w/E50.

Im already pushing the high side fueling pretty far on my relatively tame setup. Would strongly consider aux port inj or bigger injectors.