Quote (TeaRs- @ Apr 23 2013 04:59pm)
if i decide to go with my lq4 with ls3 heads/intake and e85 which turbo should i look at? was thinking a borg warner 76 mm of some sort but now im thinking i may just bump it up to a 83mm. the goal is 650 at the wheels tops
A 76 will hit your power goals no problem. With those heads and e85 you will probably run into back pressure issues though. That thing will spool something in the 78-82mm range without blinking an eye. The key is getting efficient power even at upper Rpms. Something with a small turbine wheel like most 76's have will start choking early on a well flowing 6L. I would put something like an S400SX-80 ETT on it if you want BW. It has a 92mm turbine wheel on it and you can get it in a T6 or T4 flange. 1.10 A/R at a minimum. It's cheap too. About $1200 IIRC. People are spooling full frame 88's on 6L's with heads that flow less.. If you never intend to go over 1000hp use 2" pipe on the hot side. That will keep the velocity up and will help it spool.
Huron speed makes a nice affordable T4 kit.