So its time to get a new snail, after hours and hours of searching ive decided upon the gt30r, simple right, wrong. The entire issue of a/r ratio is killing me. Ive seen valid arguments for .63 ar and for the .82 ar. Does anyone with this turbo regret getting the a/r they did or any advise? I would like to make 500whp, but if i fall short its cool.
setup 9:1 b16a itr cams jg victor x fullrace manifold ... bleh bleh bleh

 

500 on a .63 is gonna be about all that things got in it.

I got a 35r that would suit you perfect!!

 

yeah, im not looking for max whp, ive read a couple thread where a .82 made 550+ I just want decent response out of my gay 1.6l

 

I've read about these a lot too since I have a B16a. What type of use is your car going to see mostly? If it is just a DD I'd get the .63 for the quicker response, but the .82 seems like it would just hold so much better up top. The response I don't think is that drastic. I'm considering the .82 since I autox and will see some track days.

 

Im not sure what im going to do with my car, its not a dd, but at the same time i may track it. You think the .82 would be better?, My only fear of the .63 is lost of traction.

 

i have a .63 on my 400whp lsvtec with b16 tranny. im getting 14psi right around 5000. in second gear at 10psi im spinning on 225/50 bfgs. i really like the responsiveness of the turbo and for 400whp i think its great. for 500 i think the .82 is the better choice, the turbo will be more effecient for those power levels.

 

sounds good, so it seems the 82 is the way to go, worst case i can swap out to the 63 for little money

 

I've had .63 and .82 housings.. .82 housing hands down..

The car was a lot most nasty up top with the .82

I actually raced a gsxr750 and lost with the .63 and re raced him same boost with the .82 and rolled him.

Just a thought..
dk

 

so for someone wanting to push out 250-300hp on a DD .63 would be the route to go?

 

is that on a b16a application?

 

Um I would say 375-425 would be a better round about figure. It will be ok but for that WHP a GT28 would probably suite you best.

 

+1

 

I have a brand new gt3076r w/.63 Not enough money to finish build. Cincinnati, OH

 

For 400-480whp, the .63A/R is fine. You'll spend over $230 for switching out the turbine housing. they are not the same material makeup or internal volute as the standard T31 series.

 

A GSR, I know for sure the .63 would meet your goals but I dig the .82 housings and was never concerned about spool aslong as it was not so late I was droping out between shifts. I'm pretty sure my .63 spooled around 1k sooner than my 82 and still made well over 400hp on pump gas. I really don't think you could go wrong with either one.

 

So basically with a B16a2 and the Gt30r id be looking around 400. Sounds good. also would that be with 8:1 or 9:1?...im new to boost so im still learning

 

I see no reason to go 8:1 with only 400 whp let alone that low regardless. 9:1 would suit you just fine. I'm actually keeping my 9.9:1 when I go back to boost.

 

I asked this cause talking with someone i know who has built multiple boosted civics, he had said the LS i was lookin at with 9:1 was too high and that with it being a DD i wouldnt be able to run over like 8 or 9psi constantly without worrying about blowing up the motor.

any opinions on that? I dont need over 350whp....like i said, its gonna be a DD

 

its in the tune not the compression

 

i think compression depends on what kind of fuel your going to use and whatever turbo you choose for max efficiency. obviously lower compression you can run higher boost than higher compression. pump gas you want to run lower compression. higher octane like ethanol you can run stock or higher compression. if i ever build my motor im doing 10.5:1. my buddy just put 11:1 pistons and aluminum rods in his evo. cant wait to see the numbers he puts down.

oh and yes its alot about the tune as well. either way you can make a lot of power on either setups.

 

my buddy pat has a f22 with 13.5:1 with a gt42 but hes only pushin 812wh but he's runnin alcohol

 

This is part of the add the person included on the car. I of course shortened it but tell me what you think about this for a DD running pump gas and making around 250-400hp. Im also not looking to spin constantly being as i prob wont be making track appearances except maybe once or twice. Im in the military so the car is a DD driven on and off base. Cant be too crazy...haha

(9.1:1), CTR Intake cam, ITR Exhaust cam, Moroso oil pan, the engine is pretty much stock with Honda OEM parts.NEW USDM ITR Transmission with factory LSD.Brand new stage 3 Clutch and 7.5 lbs Fidanza Flywheel,

 

9:1 is excellent for a street car. My gsr is currently 9:1 and I'm actually bumping it up a bit a little closer to 9.5:1 when the car comes back out.

 

hell, for 250whp to 400whp, there are a FEW options to run other than GT30R.. I mean wow.

 

So with what ive listed above....to make that, for a DD that wont spin tires, what would you HONESTLY recommend? Im doing things the right way the first time....