on1

hey, Im building a b16 with

81.5 bore
wiseco 8.8-1 pistons
eagle rods
skunk2 pro springs and ti. retainers
skunk2 tuner1's
skunk2 pro cam gears
skunk2 intake and 70mm throttlebody
mild port and polish
arp main and head studs
hondata s300
plx wideband
and probably a top mount or ramhorn manifold

and i wanted to know your opinions on a gt3076r with the 2 different turbine housings. I have read on there threads that "oh the .63 chokes at higher rpms and lacks power, and the .82 takes about 700-800 rpms longer to spool but good power top end."

my goals are about 400 hp, a streetable car that will last a while. and boost kick in about 4000 rpm and have nice power all the way through 9000 rpm. i would appreciate your thoughts and opinions before i go drop a few grand on a turbo setup that i dont like. and if you can recommend a turbo manifold and exhaust that aint to crazy on price. thanks

Alfa Turbo

Go with a .78 twinscroll. It will help on both fronts. Why the GT3076 if you only want 400HP? The GT3071 will do it better for your goals.

LightningTeg

He'll be pushing the 3071, and the 3076 will spool practically just as quickly.

E85B18

The .63 will easily get you 400. I made 430 with the .63 on 91 octane with GSR cams @18psi. No need for the .82, enjoy the better spool!

intense4thgen

a .63 i think is perfect for what you want, spool by 3500 13 psi on pretty much same spec motor made 380 and 284trq and at 16psi made 423 300trq.

TheShodan

iTrader: (14)

We have found that the .78A/R divided did not perform with the same expectations at all as claimed. It was a bit like having between a .48A/R and .63 A/R open housing, but "spool" was very little affected and did not improve

Seraph0

I'm assuming the test with the divided housing was done with a proper manifold for it?

Alfa Turbo

I don't follow you.

Do you mean it spooled as though it was a smaller housing (i.e. quicker onset) or that top end was restricted? Or possibly both?

I see Garrett now offers two larger T3 based TS housings now, have you had time to play with these?

I once had a TS T4 .58 powering a T04-B S3 compressor on a 2.0 and it worked pretty well. T3 TS stuff was years away and the T04 housing was too big even though it was the smallest available. The GT series it has now is MUCH better but TS was pretty advanced for 1996 on a street car!

ScorpionT

In my experience, the smaller housings dont spool a whole lot quicker, but top end power is noticeably different.

TheShodan

iTrader: (14)

Why would it not? That turbine flange BTW is a bit difficult to find independently. Unfortunately, most purchasers of the turbo do not have such a flange divded and T3, so one cannot exactly duplicate that result. As a matter of course, whether or not they were completely matched showed insignificant difference for "spool up" and response.

TheShodan

iTrader: (14)

It spooled slightly better than a smaller .48A/R but not by much. Nor was there any better top end than a .63A/R

for your "TS" comment. the GT series was much better even in the larger housings because the aerodynamics was better. Not due to the housing change to Divided.

Alfa Turbo

For someone in the market for the power level a .63 A/R picking up boost onset and keeping top end would be a good thing.

Of course, did not mean to say otherwise.

TheShodan

iTrader: (14)

Understood. The OP should stay with the .63 in this instance

hondaapi

We usually use the .63AR (3071) on most of our cars. The spoolup and throttle response is really great. We like it very much. The power output we made on most cars was something between 400-450hp on consersative tunes.

Maybe a little offtopic. Has someone a comparison between a 3071 vs 3076 with the same A/R?

Kyle R

iTrader: (1)

B.

my setup is proof that the .63 will get you the 400 you're looking for.

and im only running about 12psi to boot.

Kyle R

iTrader: (1)

^Nice numbers.

on1

thanks for the responses. ill prbably go for the .63 ar since you guys have had good results it looks like. any recommendations on a manifold and exhaust? also what cooler are you guys running? thanks for the help

TheShodan

iTrader: (14)

Intercooler. Many companies that work. there isn't just one that works with that turbocharger. Exhaust manifold is what you make of it. Check the FAQs on the top of the forum regarding the types of manifolds there are available and what would work for you.

eg:R

what about the gt3080? is this turbo any better than the gt3076

TheShodan

iTrader: (14)

Are you referring to the GT3082R? (GT3040R). It has the compressor wheel of the GT35R with the turbine wheel of the 3076R. I have found it to be rather mediocre for its purpose.

eg:R

yeah the gt3040R...anyone have or try this one?? wouldnt it make power as a gt35r and spool as a 30R? anyone have dyno #'s with this turbo? i dont hear too much about it as the 3071 to 3076...