Anyone Running A 'horsepowerinabox.com' 3071r Or 3076r?

[Lil_Bobby_260]

Ok well the good things are that they go straight in, handy if you have a full exhaust system including a dump pipe that goes to the factory 6 bolt flange. Only issue ive heard is that they are a little bit down on power due to the redesigned exhaust housing that lets them bolt in?

Water lines need to be adapted etc but that is a relatively small issue.

Vehicle - 1997 Nissan Stagea RB25DET Auto

Modifications -

Aftermarket exhaust system from turbo back

600x300x76 Greddy FMIC

Turbosmart Boost Tee

Turbosmart dual port BOV

CAI fed completely shielded K&N pod filter

Pretty certain i would have to step up to an E-boost too or other type of EBC in favour of the Tee, and upgrade injectors as ive seen that these peak out duty wise once you start running larger turbos.

I dont really want to have to pull the engine down or even take the head off at this stage, is the main thing. Should i look at cams? even just the exhaust cam or an adjustable cam gear to help lower the spool RPM?

Thanks guys.

EDIT - the car in question is NOT the 260RS in my signature. cheers.

[mitchy_]

that kit is for a 25.. don't you have a 26?

also the 307* with the nissan rear housing supposedly have bad boost creep.

3076R with external gate is better.

[R31Nismoid]

They dont use the proper garrett housing i think - only use ones with proper garrett, otherwise you'll have overboosting issues... lots of people have before you

[_Ryan_]

I thought you were currently Nissan-less?

This the same? http://www.gcg.com.au/turbo/ViewProduct.aspx?ProductID=202 pretty much GT2835 Pro S spec, cant check inabox, capped haha

[Lil_Bobby_260]

I dont have the 260RS anymore... it was sold to fund the deposit on a house and the restoration of an old aussie muscle MACHINE haha..

Im having to drop back to an RSfour. Trying to sneak some modifications in under the missus' nose.

R31 Nismoid no they use a different rear housing to allow it to bolt directly to the 6bolt flange. Ive heard this is what causes them to be a lil laggy but ive seen the two (original and HPiaB versions) next to each other and i dont see anything that would greatly impede the flow of exhaust gasses...

WOuld it be a better option to go something different completely, and run a different dump pipe to suit? Im just chasing a low mount replacement that offers decent power and power delivery without creating to many hassles. now is that TOO MUCH TO ASK!?!?!?! GOSH!!!!

sorry....

Ryan im picking up an RSfour next week that is pretty stock standard save for some wheels and suspension. Fresh canvas.

[R31Nismoid]

Well buy it if you must - but when you come back posting about boost control problems dont say people didnt warn you. Two people have in two posts... its not good odds.

If you dont want hassle... garrett rear housing... its not hard.

then buy dump to suit, again, not hard. it all has to come off to be fitted

be happy

[_Ryan_]

Well buy it if you must - but when you come back posting about boost control problems dont say people didnt warn you. Two people have in two posts... its not good odds.

If you dont want hassle... garrett rear housing... its not hard.

then buy dump to suit, again, not hard. it all has to come off to be fitted

be happy

Do they come in IW and will they fit under a stock turbo heat sheild?

Bobert, link me the new one

[Lil_Bobby_260]

[link]http://www.horsepowerinabox.com/HPIAB2/category12_1.htm[/link]

Its the 7th turbo down the page.

Boost control problems would be a wastegate issue nismoid? Thats why you recommend an externally gated unit...?

Not sure if they fit under the shield ryan - they are a lil bigger.

[_Ryan_]

[link]http://www.horsepowerinabox.com/HPIAB2/category12_1.htm[/link]

Its the 7th turbo down the page.

Boost control problems would be a wastegate issue nismoid? Thats why you recommend an externally gated unit...?

Not sure if they fit under the shield ryan - they are a lil bigger.

The questions were for ash(as he had a GT30 i think), and the link request was for the stag haha

[Lil_Bobby_260]

My bad.

Will PM you a linky dink.

[R31Nismoid]

[link]http://www.horsepowerinabox.com/HPIAB2/category12_1.htm[/link]

Its the 7th turbo down the page.

Boost control problems would be a wastegate issue nismoid? Thats why you recommend an externally gated unit...?

Not sure if they fit under the shield ryan - they are a lil bigger.

No, boost control issues with non genuine GARRETT housings...

Nothing to do with external gate

[_Ryan_]

No, boost control issues with non genuine GARRETT housings...

Nothing to do with external gate

So do garret make an internal wastegate housing?

and do the GT3071/76 fit under the standard turbo heat sheild?

[Lil_Bobby_260]

keen on an answer to this also.

Decent turbo with a matching flange available? or is it a new dump pipe type adventure?

[R31Nismoid]

So do garret make an internal wastegate housing?

and do the GT3071/76 fit under the standard turbo heat sheild?

Yes - its been covered in detail before

I do not know.

[_Ryan_]

Yes - its been covered in detail before

I do not know.

Cheers,

Wasn't sure if you had tried to hide yours!

[R31Nismoid]

mine was in 2004, external gate.

Garrett did not make an internal gate housing for that series till ~2006/2007

[discopotato03]

Have to search under GT3071R IW or GT3076R IW , I'm told the propper GT30 integral wastegate turbine housings were developed here in Australia and look very similar to the turbine housing on Fords XR6 turbo cars .

In that case they're used on a GT3582R , personally I think they are intended to be GT30 turbine housings but some are machined out to fit GT35BB turbines/turbos .

People here like Mafia/Cubes are using them and I posted pics of the bare housings when they became available in Sydney a couple of years ago - don't have the link sorry .

I would always use a genuine turbine housing given a choice because the manufacturer designs the housing to work with their turbine - they are a matching set say like a 16" wheel with a 16" tyre .

I'm not going to rag anyone but it's easy to see where producing a generic turbine housing and machining it to suit various diameter turbines will cause problems , because like the 16" rim example you may guts a 15" tyre onto it but its not the way the engineers intended it to work .

The usual problems with generic turbine housings is elevated exhaust manifold pressure (TIP or turbine inlet pressure) which shows up as what people call "boost creep" - the wastegates inability to bypass sufficient volume of exhaust gas to "throttle" or control turbine speed (compressor as well) and therefore boost pressure .

The best gas flow situation is to use the turbine/turbo manufacturers matching family of turbine housing but even then the housings A/R ratio has to be right as in not too small .

Search here under GT3071R and GT3076R because there are some long strings and lots of peoples R and D you can benefit from .

Beyond the scope of this thread but Garrett is tooling up to make a bolt on version of the GT3071R and GT3076R for the the Evolutuion 10 Lancer . The big news is that their turbine housings will be twin integral (internal) wastegate and twin scroll available in 0.73 and 0.9x A/R ratios .

Sadly the mount flange style is not split "T3" but if adapters or a custom manifold were on the cards it'd be real hard to beat on a road car .

Hope this helps , cheers A .

[JonnoHR31]

i have a 3076 .82 IW on my 25. got told by the company i bought it from i'd have massive boost control issues with IW but i gave it a go anyway. i think the most important thing is having a big bellmouth dump on it. i made one up with a mate with lots of flow around the gate area and with a 12psi actuator it holds 12psi perfectly

the "bolt on" gt30s have a machined out rb25/vg30 rear housing to make it bolt on. even machined out to their max they're still not really big enough to work properly. definately get a genuine garrett rear housing.

and the stock heat shield fits with some modification, i just bent myne a little bit and screwed it onto the manifold shield, works pretty well

[Fat_Tony]

Has anyone used this one from tweakit.net? http://www.tweakit.net/shop/product_info.p...roducts_id=6598

Its got a garrett 5-bolt dump rather than the Nissan 6-bolt dump. Would that help with the boost control issues?

[Cubes]

Trick is to run the .82 IW.

If you wish to run the .6 or .7 RB style 5 bolt turbine housing or .6 Garrett xr6t style you will have issues with boost creep.

To help with boost control the best method is to run a nice big bell mouth. The splits tend to improve gas flow of the turbine wheel while due to the 'typical' split design it reducing the available area 'around' the wastegate flap.

As the flap opens it partially blocks the dumps wastegate pipe, not good for a turbo that is running a flapper sized borderline for its application.

HPIAB I can recommend; tweekit have never got back to be on several occasions when querying their products so sadly I cannot recommend them.