actually thinking of putting a 57 trim on my motor with .63 ar exhaust housing.

whats the upper limit of that exhaust housing before i should try and find an 82 ar?
my motor is an 84x89vtec, 01 itr cams and valvetrain, victor x im using a miniram mani, 44mm gate and full 3" exhaust

 

You'll get about 20 more hp or so from the .82A/R but at max about 435whp. Get a larger turbo after that point.

 

Mine makes 500ish on 30lbs on a pistons/rods b16. I wouldn't recommend that though, it's way out of it's efficiency range and it's workin mighty hard and now it's starting to smoke a little after about 20kish miles. I agree with Shodan, if you want more than 435-450 then find something else.

 

my t3/t04b 57trim .63 made 420whp@17psi.

great turbo with the right setup and tuning....underestimated by most users.