You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!
Whp gain with:TPIS 90MM intake/90mm TB fully ported??
Lets make a small poll for this one
I got a 383 and im putting down 490whp/461wtq with a stock untouched ls6 intake and stock untouched 78mm tb.So i was looking to improve my intake.
1-I did not use a Fast 90 or 92 because i had one on my first setup and the lower sheel cracked twice because of the cheap plastic.
2-I did not use a Fast 102 because after some test fit,it was rubbing/hitting my cowl.There is no way i would cut my car for a intake and will not use shorter engine mount.
So the TPIS 90mm ls6 was the way to go.A solid ls6 gm base with a 90mm opening.But they are kinda rare in the used market.Ive found one a couple weeks ago for a faire price and bought it.I will use a 90mm ls2 tb.Both will be professionaly ported and the transition between the tb and the intake opening will be seem-less.
So simple question:
After some tune adjustment ,how much whp should i gain ???
Hoping for at least 20whp
__________________ Silver c5 z06
G5x3 with bolt-on=440whp/377wtq
Now:383 stroker =490whp/461wtq
Mods :TCI 10% damper,mgw gripper ****,180 stat,ARH 1 7/8 headers/x-pipe,dyno tune... Vendors: Vararam/powerduct,HID,led halo tail light,black corner light:JW Motoring-CLB,jacking puck:Corvette of Houston-Catch can,race pedal:CCA-Oil sensor relocation kit:TPE-Full front end gripper,cf batt den cover: American Hydrocarbon-Full led set in/out:Corvette Mods LTD-Partition:SCP
Last edited by always faster; 11-02-2013 at 12:56 PM.
I only picked up 11 rwhp on my heads/cam C5, from about 3,500rpm and up, lost a bit below that though, ported Fast 92/90 and a well respected tuner.....I was hoping for more but I got about what he told me to expect....