KidFrost

Hey everyone, I'm looking to make some changes. For no particular reason, just changing my manifold to a better one. Need some input.

Current turbo setup:

Neukin ramhorn
GT 3076R w/ .82 turbine housing. 4 bolt.
3"dp

What I'm thinking of doing:
Full race pro am top mount manifold
Gt 3076r w/ .78 divided housing. V-band
4" dp- possible hood exit up pipe

The car is currently great, it made 529whp @ 21 psi on E85.



I'm not looking to make a bunch more power, maybe pick up some spool time, and hold power up to current setup.

Will the turbine housing change things much? Is it worth the $300 upgrade?

This will come with a retune obviously..

Lmk.

-Kidfrost

eg:R

I wouldn't do it. If it is a street driven car you will have more traction problem. If you have a s300, just increase your boost by rpm in the lower rpm.

TheShodan

iTrader: (14)

I wouldn't go topmount either. a .63A/R would do much nicer powerband (I'm at 530whp now). I've experienced the .78A/R divided housing (which originally was only used for the GT3271 journal bearing and is not a twin scroll despite what ATP Turbo claims.). You won't experience any better "spool" than if you stayed .63A/R. And going topmount would just make the powerband even worse.

Stick to what you got.

wantboost

iTrader: (2)

I hate that everyone that has a divided turbine housing screams twin scroll not even knowing what they are lol

You won't see much difference especially if the mani isn't divided. The only advantage to a properly sized divided/twin scroll turbo is the torque curve is very fat, broad, and linear across the entire rev range. Really smoothes the car out from the typical on/off switch torque curve most turbo Honda's have

KidFrost

It is pretty much a track car at this point. I think I drove it all of 4 times last year. And either way I have M&H 235/60/15's for the street, and 24.5" slicks for the track.

Ok thx for your input but, for starters I have a .82 housing now not .63. Also it's not from ATP the housing I'm referring to is from Garrett. Also the Full-race pro am top mount IS infact twin scroll.


Lol

Again the manifold will be divided, and the advantages you speak of are exactly what I'm after.

Thanks for all the input guys.

-KidFrost

dcmatt

iTrader: (7)

They are referring to the fact that the term tnwin scroll is a catch phrase for divided housing setups. A true example of twin scroll would be a borg warner EFR.

EF1.8T

What about the new Garrett twin scroll housings?
They are made by Garrett and not by ATP but cost $527 and not $300.

KidFrost

Ok, to be honest Im not sure of the difference. Can you explain?

When looking at the Garrett GT3076R Twin Scroll Turbo, I assume this is a legit "twin scroll"?


Found Here- http://www.full-race.com/store/turbo...oll-turbo.html

If so, the turbine housing looks identical to the turbine housing i want to install on my GT3076R, pictured in this link- http://www.treadstoneperformance.com...T+Ball+Bearing

Also, are you implying that the divided housing, although not a true twin scroll, isnt an improvement over non divided housing in my perticular situation?
Which is:
Going from a ram horn and non divided .82 housing to a topmount and .78 divided housing.

This is what I am referring to, from Treadstone. I assume made by Garrett. Looks to be the same housing used on their "twin scroll" GT3076R


http://www.treadstoneperformance.com...T+Ball+Bearing





Thanks again guys.

-KidFrost

TheShodan

iTrader: (14)

At 1:22 of the 2011 video

Those have been technically released in early 2012, but production has been severely limited, so if you found one for $527, that's pretty much a deal.

Those are actual twin scroll turbine housings with the v-band inlet. Not enough testing and feedback has been done yet over the last two years, so don't expect any result differences (if any) anytime soon.


As a matter of reference .78A/R Housing from ATP that is divided .78A/R is a T3 flange.. The Full-Race Pro AM Top mount is a T4 DIVIDED flange housing. They would not fit with one another.

Even Full-Race is listing this as their "twin scroll" (laughable) housing (its still an ATP forging that utilized the casting from the GT3271 JB turbo)

http://www.full-race.com/store/turbo...oll-turbo.html


I'm making the reference to the .63A/R housing because tests have shown that the .78A/R T3 has mediocre responsiveness and not much more top end then a good .63A/R, so you're wasting time trying to get this. The .78A/R T3 flange for that was made for a diesel or tractor application.. Not this. This is Not a legitimate "twin scroll" turbine housing.




In which you'd lose all of the advantages you're looking for especially by going to that Top Mount manifold, and trying to make up for that lack of responsiveness by using the .78A/R.

*EDIT* 9.4.2013

From your last post here, that's EXACTLY what we're saying.... What looks good on paper, doesn't necessarily translate to real-world. Keep what ya got.

EF1.8T

https://www.facebook.com/photo.php?f...52761602720103

ATP sells them http://www.atpturbo.com/

I am interested in this as well currently I am running an AFI divided T3 top mount with a divided housing AiResearch 1.06ar on a GT3076R.

TheShodan

iTrader: (14)

You poor, poor soul.. 1.06 on a 60mm turbine wheel on a topmount to boot. The equivalent to the acceleration of a Lima Bean, compared to what that GT3076R could really do with the right equipment. You guys and these topmounts with these small turbos.. Is it a LOOKS thing? Trying to be different? Help me out here.

oy, veh...

wantboost

iTrader: (2)

No problem OP, it's what I'm here for

Next piece of advice backing up what TheShodan has said.

Top mounts are very laggy compared to every other style of manifold.

The longer runner length means a loss in exhaust gas velocity and heat, two things that make a turbo spin. You can coat the manifold and turbine housing or wrap the manifold and use a turbo blanket or both which will help some

But unless you're aiming for high high hp and top end power (which is obviously not what you want) try to find a divided ramhorn mani or a similarly styled manifold (in terms of runner length) to get the response and powerband you seek

TheShodan

iTrader: (14)

Even a divided wouldn't help. The turbine wheel is in too small of a class to put the right sized volute over it. It's not like he can get a EFR turbine housing to fit, because it won't.

He'll be fine with a proper bottom mount, or min-ram manifold.. It's not even that complicated with today's Honda resources and choices

wantboost

iTrader: (2)

And he could coat the bottom mount or wrap it or both, same thing for the turbo, coat it or put a blanket on it. He'd see a major increase in response not only in initial spool up but transient spool and recovery between shifts. As well as an increase in hp and torque

P.S. talk to TheShodan about getting stuff coated. His prices are fair and the end result not only looks great but is super durable. I've had a turbo that he completely coated (both housings) going on 8 years and it still looks new. I even had an exhaust leak that left carbon deposits all over the turbine housing. A little purple power and some 0000 steel wool and a non metallic brush and it came right off and the coating wasn't stained or damaged in any way

th3pwn3r

What about extrude honing?

wantboost

iTrader: (2)

Eh. I've found it overly expensive for what you get. Yea it's great for complex parts you can't port completely but that's about it

No point in porting a turbo manifold, unless it's cast. Porting a turbine housing should be limited to gasket matching and removing casting lines/flaws and polishing. Removing too much material means a larger a/r and you could affect housing efficiency if you don't know what you're doing

TheShodan

iTrader: (14)

Ah. The Young Jedi finally is searching for a seat on the counsel.

wantboost

iTrader: (2)

Huh? I did request moderator status lol

B20MTR

bump

TheShodan

iTrader: (14)

Nothing to bump. . Stick to your original thread.

EsotericImage

iTrader: (8)