ammonm

I am looking to do my own twin turbo for the LS1. I know Phamspeed has a kit that uses the GT3076R. (I have seen other sites that build similar kits based on these turbos also) After doing my own research I decided these would be the best turbos for my application.

My question is which one is the best for a near stock LS1? Would I be better off with the .63 or the .82 A/R? I plan on doing drag racing, so the high end isn't as important as the mid and low range. But I also don't want to be starving for air at 6,000 rpm.

I would be tempted to use a kit, but I want to put the turbos behind the engine. (similar to the APS Engineering Twin Turbo) I am also putting this engine in a 3rd gen camaro. I have yet to see a kit for a 3rd gen camaro running a LS1!


Any ideas?

onfire

iTrader: (17)

0.82 for 346ci and up

smokinHawk

iTrader: (48)

for drag racing you would want the power up top, cause once you get into the higher powerband you stay there making your low and mids not as important (though mid is somewhat)

ammonm

0.82 it is then!

When would someone want to step up to the 1.06?

Stupid Boost

iTrader: (1)

I bought a pair of gt30R's with .82's from Jose and they work great for our 302 application.Only problem is backpressure was causing some head lifting problems(known Ford problem) once we tried to push more boost.Jose advised us to swap to a T4 flange unit to solve the problem, but right now we are going to just keep the boost down. I am trying to get some GT35r's from him next, which he said he can get T4 housing for. If its possible, i am going that route.

ammonm

Back pressure with a 302? That doesn't sound good! What boost can you run it at before you have problems?

If I one day decided to stroke my LS1 and go to a 383, do you think a pair of these turbos would have the same problem? I want to leave my future options open...

Wnts2Go10O

iTrader: (12)

you would probably need a completely different set of twins if u went from 346-383. comparing what a ford 302 does compared to a gm 346 is like comparing apples to metal

ammonm

I was hoping (based on the air charts) that twin GT3076Rs should work well on a 383. Maybe I will stick with stock displacement.

Too many choices to make at once.....

ammonm

I've created a new post cuz I am re-thinking my decision.

https://ls1tech.com/forums/forced-induction/451486-best-setup-reliable-600hp-near-stock-ls1.html