my set up is as follows
84mm ge sleeved jdm gsr, arias 9:1, manley rods, skunk 2 tuner 1 cams, supertech valvetrain, victor x im, 68 or 70mm tb, precision 1000cc injectors (might go bigger), walboro 255, 4 bar map sensor...blah de blah

it'll be mainly a weekend/nice weather street car with occational 1/4 mile passes.

i'm looking to make around 600whp with the least amount of boost
with the ability to run 300hp for longer drives when necessary
what would work more efficiently with my goals?
the .63 a/r, .82 a/r or 1.06 a/r?
or would you recommend a different turbo all together?

please justify your answer with reasoning. thank you.

 

i always like to stick to .63 on 600 or less setups because they are a little more streetable than the others

 

the .82 is also a good choice. I know my buddy is working on his setup right now that looks almost similar with the same goals and he went with the .82.

i remember my first setup I got was used and it was on a b16 with 83mm pistons sleeved and all, that setup pumped out 523hp@20psi so its possible.

 

It can work. there's also the BW S362 camp.. (Oh c'mon, you know I had to throw that in...)

 

If you poke around the Evans-Tuning dyno library/forum, you'll find you might want to go with a GT30 with a larger exhaust. There is one that showed a larger GT30 against a GT35, and the only difference was faster spool and a one or two dozen less horsepower. Some GT30's (gt3082r) can get you past 550, especially with the setup you're planning.

Since its almost a certainty that you'll need race gas for 600whp, and you want it as a street/strip car, I'd get the smaller turbine better suited for faster boost.

http://forums.evans-tuning.com...=5210
http://forums.evans-tuning.com...=5105
http://forums.evans-tuning.com...=4808

A B-W turbo is a different matter. I don't know enough about them to recommend size, but like all turbos, the wheel size can get you a rough idea. The s362 is slightly larger than the GT3582r, but will spool just as fast. The S258 is kinda in-between the GT30 and GT35 in terms of both compressor and turbine.


Worst-case for the smaller turbo, you get no2 or meth to make a little more power. With the larger turbo, constant no2 to spool it on the road will be a major drain on the wallet.

 

Thanks everyone for the info.
Especially HiProfile for the dyno graphs with mod lists. Very informative.

Other people are more than welcome to chime in with experience and knowledge too.