2 Attachment(s)
computer sim of your combo
Quote:
Originally Posted by 94gt-sn2000
what about trick flow twisted wedge heads? i have an opportunity to get a pair that are ported for a pretty good price, what kind of intake?
Those are a much better match to your 408, even if you decide to stick with the GT40 for now. I am attempting to attach dyno graph pics from Engine Analyzer software, if it works, the first one shows your current setup with and without 7.5 psi @ 6k rpm, 2nd graph shows the TW heads, with /without same boost. [edit: I don't have the compressor mapping for a VR4, the SN2000 wouldn't make more than 5psi no matter what pulley combo I tried, so I ran an S-trim instead, and adjusted the pulley ratio to get 7.5psi @ 6k].
Okay, the attachment worked. You can see that the GT40 intake dies off over 4500, but with the boost pushing air through it, it should pull strong to 5500 before starts falling off. fwiw the cam I used was an F303, and 1-5/8 longtube headers.