13kempmyl

So I have a stock ls3 with upgraded fuel system and had a precision 76mm turbo that just ate the dust. I bought a TC76 Turbo from Huron Speed some how thinking it was 7675 and now I am wondering if I am screwed. I did some research and the general consensus seems to be that the 68mm wheel is a little small for a 6.2l engine.I was only pushing 7lbs and about 500whp when the bearing went out in my old turbo and I had planned to put in an 11lb spring once I broke in my new clutch since my goals from the beginning were about 600whp. My question to you guys is at what point approximately is the 68mm turbine going to choke out a 6.2 ls3? Should I be alright to 600whp?650whp?700whp? I dont want to throw it on and get it tuned only to learn I will never get it to work right above 550whp. ANY help would be greatly appreciated. THANKS

stevieturbo

Why not phone Huron speed and ask ?

If it is brand new and unused, maybe they can work with you for something larger ?

4doortypels

iTrader: (39)

They say they need the 75mm.. My guess would be 650. I've seen a few 7575 370 motors push 800rwhp in auto trans trucks. With e85... I spoke with them a while ago they said 650 to 700 it would really fall off... Due to back pressure... Venting to atmosphere may help a little to with the wastegate. A turbonetics reply had a great post on the ls3 turbo kit with that 7668... Showing compressor maps on the camaro5 forum