Garrett 3076r Internal Or External Gate Rear Housing To Small?

[WYTSKY]

3076 with 0.63 externally gated on a 6 boost sounds like a winner to me. Yes in 4th and 5th gears the 0.63 housing will be restricting top end power, but going by what you are asking for it sounds perfect.

I still don't like the idea of a 3076 with a .63.. tad small (the HKS housing is i think .78 ~ .74?)

Put a .82 on there or get a 3071

Nevertheless the 0.63 will give better response at the cost of some top end....but it will meet all the requirements and is sitting there ready to go. There will no boost control issues which is the major potential drawback of the 0.63 internally gated housing.

I think it is more a question of whether you want to go to an external gate vs internal gate as either turbo will work fine.

Hey guys, thought I would say I am almost finished putting on my 3076r with a .63 rear housing and welded steam pipe to 44m Tial gate on...

alot of people have told me alot of mixed answers, hoping to get a nice responsive 270-280kwish with roughly ~16psi... sound possible? (I checked dyno thread and as people have noticed, not much in there for this setup)

p.s soz, not trying to take over thread.

[PJ.]

I still don't like the idea of a 3076 with a .63.. tad small (the HKS housing is i think .78 ~ .74?)

Put a .82 on there or get a 3071

They're 0.73 Nismoid, I made 291kW on my 3037S on BP 98 (19psi) and 342kW on a 24-22psi spike on E85. Full boost was around 4500rpm on an SR but you can play with cam timing and get them on sooner.

I guess it's not really comparing apples with apples since it's on a 2 litre, but just goes to show what those baby HKS housing are capable of flowing, and they along with the 3076R's are very aggressive.

ATP make a 0.78 divided housing for them too, this in my mind with a twin scroll/twin gate setup is the ultimate combo for someone chasing a solid 300kW on pump fuel with mega response. They also come in 0.82 and 1.06.

Getting a bit off track but still interesting and I've posted this somewhere else on SAU I'm pretty sure. As an example my two setups on pump fuel, SR20DET, my first one had a T88-34D and made 315kW at the wheels on 21psi, my 3037S made 291kW on 19psi. T88 trapped 125mph, 3037S 134mph. Even when the T88 was making 387kW, it ran 137mph on 29psi and a race tune!

Peak power doesn't always mean a faster car, suiting the power to your gearing and a chunky mid range it where it's at....

PJ

[l0WRB]

very interesting PJ

[discopotato03]

Again my opinion only but depending on what you're looking for a 0.63 A/R turbine housing is workable on a GT3076R , HKS had 0.61 and 0.73 A/R turbine housings (sadly non gated and T25/28 flange) available and I don't remember anyone saying they surged - provided they had the 3037"S" port shrouded compressor housing on them .

I'll quote from my HKS spec sheet and you be the judge .

Std 3037 48T - 420 PS

Std 3037 52T - 440 PS

Std 3037 56T - 450 PS

3037S ... 52T - 450 PS

3037S ... 56T - 480 PS

Everything I've read seems to suggest that the std compressor housings are aimed at four cylinder apps - generally larger cylinders that sixes and a flat plane crank meaning 180 degrees between power strokes .

Quite often HKS have port shrouded housings for sixes and specifically the Pro S turbos for RBs all have them .

I personally think the 76.2mm GT37 compressors work better with the full sized GT30 turbine and its the port shrouded comp housing that lets them get away with spinning the turbine/compressor group up earlier with smaller A/R turbine housings .

AFAIK the most responsive GT3076R combination using Garrett marketed bits would be the 52 trim compressor version with the 0.63 A/R GT30 turbine housing option . ATM you can buy this combination of bits and even get the port shrouded comp housing for it just like the 56T version .

Every one's different but for me getting some boost and extra torque at sane revs is ultimately more important than a sheet of paper saying 300 RWKW .

The system is out to get you on public roads and the situation is getting better for the authorities every day .

I think of it like this , when you drive your turbo car up long hills at 100/110 on expressways in its highest gear do you actually get any boost and can you sail up these hills effortlessly without changing down ? If the answer is no then IMO its not a very street friendly setup .

Like someone said the smallest T housing will ultimately limit the top end but in a road car that's not as important as broad spread of torque where its needed most .

My opinions only cheers A .

[lookingforboost]

how to i fond out what trim my turbo is? i cant remember if its the 52 or 56T

[wolverine]

It will almost certainly be a 56trim compressor.

[lookingforboost]

no worries i had a look and it is so i think that if i stick with that see how it is and if i want to i can change to the .82 rear when i want to move up in power

What do you guys think?

[wolverine]

I still think this...

I think it is more a question of whether you want to go to an external gate vs internal gate as either turbo will work fine.

[lookingforboost]

i think i want to go with the external gate setup

[GTScotT]

In my garbage opinion. External gate, .63, will be fan f*cking tastic. Wait and see.

GL

[Harey]

Recent post in RB25 dyno results thread:

"unopened Neo Rb25det

-3076 56t with .64 housing

-highmount AM Performance stainless steampipe manifold with HKS 38mm gate

-Profec Spec B

-600cc injectiors

-fmic

-3.5 inch exh

-Nistune

310 rwkw @17 psi at around 6800 rpm

fullboost by 3500

roughly 480 nm torque at engine (calculated) "

POW! I would love to see a dyno sheet too.

Edited May 5, 2010 by Harey

[l0WRB]

this is on hub dyno im pretty sure?

[lookingforboost]

hub dyno or not that still more than what i was after with the same sort of mods i am looking at and nice boost response

i am excited now my only next decision is which is better

HKS low mount cast manifold External gate..... or

6boost high mount manifold with 48mm progate?

What do you guys think will work well with what i want to do with the car or either will be ok?

both i think have good and bad points HKS low mount so the police dont double look 6boost high mount so there is no hidding the turbo from them

[TiTAN]

or use the stock manifold with a small spacer and weld on a pipe for the external gate.

Edited May 5, 2010 by TiTAN

[l0WRB]

what titan said

unless money isn't an option go etm manifold

[lookingforboost]

what titan said

unless money isn't an option go etm manifold

i wanted to try and not use the stock manifold with a welded on gate but if the gains from either of the 2 in minimal then i do whats cost effective for the setup

Whats an ETM manifold i havnt heard of them before? Do you think that the HKS or 6boost would be better than the stock one?

[l0WRB]

extreme turbo manifold

he is from nsw, very similar designs to 6boost