Garrett Medium Frame Gtx Turbos

[Harey]

You could even use the stock inlet hose or do the Rev210 $5 mod instead of a metal pipe.

I could not make anything over 250rwkw using standard intake with the Rev210 $5 mod. The top half of the dyno was basically a flat line. I would strongly recommend a metal intake pipe, I just finished mine with return ports for both the bov and pcv.

[ARTZ]

Ok so i bought a bunch of supporting mods for a turbo that didnt perform as expected and basically would have been almost as good without them..

so coupla hypothetical Q..

if i got a gtx3071 with a .6 comp and .82 rear would require a 10mm 0r 20mm manifold spacer?

do they come in 3inch inlet?

which dump/fornt pipe?

will my 2.5 inch cooler pipe be big enough?

last but not least, best place to get one?

Cmon guys tempt me...

[discopotato03]

From the advertising pics and blurb I gather you can treat a GTX3071R just like a Garrett GT3076R , the real one , because they appear to use the same compressor housing casting . By this I mean only from a packaging/mounting perspective .

Facts about GT3071R's and HKS "GT2835R's" in all forms .

Believe it or not in current Garrett speak both are called GT3071R because they both have a variation of a GT30 turbine and a 71mm major diameter compressor wheel - 71.1mm actually .

HKS are actually guilty of telling porkies because there is nothing GT28 about these "2835's" from a turbine or housing viewpoint . Actually I'm splitting hairs because many of HKS's GT30 based turbine housings have a T2/T25/T28 (same) sized mounting flange . The exception is the GT Pro S turbine housings fitted to RB spec GT2835 Pro S's and GT3037 Pro S turbochargers .

Another one lost to many is the 35 designation they use for the compressor wheel , again believe it or not Garrett make a large frame plain bearing turbo called from memory a GT3571 - GT35 turbine and 71mm comp for some OE Diesel app . Because they had Garret use this compressor from a "GT35" turbo they call its compressor GT35 as well .

I can only guess that the cropped GT30 turbine they were somehow passing of as "GT28" and the "GT35" compressor were mated together in what is know as a GT25BB center section came out as GT2835R - R as always meaning rolling element or ball bearing . Personal hate is term roller bearing , rollers are NOT spherical and should not be mistaken for ball bearings , annular contact or not .

More confusion with the R exists because HKS had a variation of this turbo called 2835"R" only is this case it meant the larger 90 trim version of the cropped GT30 turbine . The rest of the "2835's" inc the Pro S version use the 84 trim version of the cropped GT30 turbine .

From what I can tell the cropped GT30 turbine was originally a special made for HKS by Garrett though nowdays since these HKS spec cartridges have been around so long anyone can buy them and some of Garrett's range have them standard ie the cropped versions of Garrett's GT3071R's .

I don't have any inside info on the GTX compressor wheels but I can point out a few obvious points on the GTX3071R .

Firstly the pics show the compressor housing to be the port shrouded version of Garrett's T04E housing family AFAIK originally used on the HKS spec GT3037S . In time Garrett sold this turbo themselves as the GT3076R and apart from the turbine housing the only difference was the lack of the bolt in bell mouthed air inlet .

GTX compressor wise Garrett's blurb mentions that they have 11 full height blades which differs from the 71mm GT wheel which has 12 blades all up , 6 full height and 6 lower or splitter blades .

Also note that the GTX3071R and GT3076R use 58 trim compressors and both have port shrouded compressor housings , I think the GTX3582R may be the same deal though using a larger T04S 0.70 A/R port shrouded comp housing .

So all port shrouded with one less and all full height compressor blades and in 58 trim .

The compressor maps look very interesting but as always the proof is what these turbos can deliver in the real world .

My "spin" so far , cheers A .

[D_Stirls]

Hey Disco,

Can you give any advice on what is the better Split Pulse housing out of the 0.78A/R and the 0.82 A/R that are available for the GT30 turbos. This is for a 1.8 litre engine BTW (CA18det).

Cheers

Edited December 14, 2010 by D_Stirls

[discopotato03]

As far as I know Garrett don't make twin entry turbine housings for GT30 series turbochargers , the 0.78 A/R one is intended for GT32 based units and the 0.82 and 1.06 A/R ones advertised in the US are who knows what .

Given a choice at least you know that the Garrett 0.78 one is designed/cast/machined by a turbo manufacturer as original equipment on something - I think a Diesel in that case . People have said that those other things look a little dodgy internally and if they aren't OE on something then they have no performance or manufacturing standards to comply with .

Twin scroll turbine housing when used in higher EGT petrol applications preferably need to be cast in good hi temp capable materials because the divider around the nozzle section is thin and if the material is a bit average in this area heat stress often damages them . The material and manufacturing difficulties is part of the reason why high performance turbine housings can be quite expensive .

Also think outside the square , sometimes other brands of turbos can be a better match for a given application than Garrett .

A .

[bradsm87]

ATP advertise that the .82 and 1.06 divided housings are made by Garrett and full race say the castings are a lot better than the .78 GT32 ones.

[JonnoHR31]

this one might be the gt32 one disco is reffering to, made by garrett.

http://www.atpturbo.com/mm5/merchant.mvc?Screen=PROD&Store_Code=tp&Product_Code=ATP-HSG-009&Category_Code=GTH

these ones however are definately not made by garrett. they have atp cast into the housing so i assume its made by them.

http://www.atpturbo.com/mm5/merchant.mvc?Screen=PROD&Store_Code=tp&Product_Code=ATP-HSG-063&Category_Code=GTH

these ones here i'm not sure about, it says its a garrett casting?

http://www.atpturbo.com/mm5/merchant.mvc?Screen=PROD&Store_Code=tp&Product_Code=ATP-HSG-078&Category_Code=GTH

http://www.atpturbo.com/mm5/merchant.mvc?Screen=PROD&Store_Code=tp&Product_Code=ATP-HSG-080&Category_Code=GTH

[bradsm87]

Yep those bottom ones are the new Garrett castings and very good.

Edited December 15, 2010 by bradsm87

[islade]

So, responsive street car dreaming of a HKS2835 on a budget. I'm happy with 250KW, as long as it's reponsive.

What exactly is going to happen if i go external gate with a 0.6 housing on a GTX3071? I am guessing boost control won't be a problem with external gate, and it should be super-responsive otherwise, what's this story with heat etc?

[bradsm87]

U wouldn't want to run more than about 15psi through the .63 because that's when the backpressure goes a little crazy and heat becomes a problem. U should make 270rwkw on 15 psi anyway so it won't be a problem.

[l0WRB]

U wouldn't want to run more than about 15psi through the .63 because that's when the backpressure goes a little crazy and heat becomes a problem. U should make 270rwkw on 15 psi anyway so it won't be a problem.

my mate runs GT3082 .63 on 19psi external gate 50mm and makes 290rwkw and its responsive and fast on the street.

[bradsm87]

Yep u can FORCE the car to make power early but there's a lot of heat and pressure in that exhaust manifold. ESPECIALLY with a GT3082R because u have a huge compressor wheel wanting to keep making power and the turbine half just can't take any more.

The 82mm compressor wheel isn't even in it's sweet spot yet and the GT30 .63 rear end just can't take any more.

If that exact same car had a GTX3071R .82 running the same boost which is a much better match of compressor to turbine, it would make full boost earlier, WAY more torque through the midrange and make more top-end as well.

[l0WRB]

Yep u can FORCE the car to make power early but there's a lot of heat and pressure in that exhaust manifold. ESPECIALLY with a GT3082R because u have a huge compressor wheel wanting to keep making power and the turbine half just can't take any more.

The 82mm compressor wheel isn't even in it's sweet spot yet and the GT30 .63 rear end just can't take any more.

If that exact same car had a GTX3071R .82 running the same boost which is a much better match of compressor to turbine, it would make full boost earlier, WAY more torque through the midrange and make more top-end as well.

yeah more then likely would

but its an old setup from like 3yrs ago lol

im just saying this car still feels quick and responsive on the street 4 an older setup.

anymore response and u would feel like your driving a gay stock skyline again..

nothing wrong with powerband from 4-7 i think its near perfect.

[bradsm87]

Yep that's it. Still lots of fun! I certainly wasn't saying it's bad, just it could be better.

[l0WRB]

Yep that's it. Still lots of fun! I certainly wasn't saying it's bad, just it could be better.

It sure would!

id love to try a new gtx3076r, ive had the old gt3076r.. be interesting 2 try one thats 4 sure

[islade]

f**k this,

I might be ordering a GTX3071 from RealStreetPerformance today, to go external gate using the modified stock manifold that I0WRB is selling.

I really want response, and my RB has 160km's on it, so although the supporting mods could get me to 300kw, i don't know how far I want to go as it's my daily ride. I'm over lag.

How much real world difference is there in throttle response between the 0.63 and 0.82 housings. Not like for drag off from the lights where you can just dump the clutch at high revs and keep the boost up, but more in situations where i'm powering out of a roundabout or performing clutch-free downshift-less overtaking?

Because if there's not much difference in the real world, i'll play it safe and go the 0.82

[D_Stirls]

These guys are cheaper buy around $300

http://www.turbo-kits.com

They haven't got them listed but they do have access to them. Just send them an email asking for what you want and list what turbine housing your are after (they can supply all the housings that ATP list for example) and they get back to you within 24 hours.

With the 0.78 Twins Scroll housing they gave me a price of US$1429 + Postage.

Edited December 15, 2010 by D_Stirls

[Harey]

f**k this,

I might be ordering a GTX3071 from RealStreetPerformance today, to go external gate using the modified stock manifold that I0WRB is selling.

I really want response, and my RB has 160km's on it, so although the supporting mods could get me to 300kw, i don't know how far I want to go as it's my daily ride. I'm over lag.

How much real world difference is there in throttle response between the 0.63 and 0.82 housings. Not like for drag off from the lights where you can just dump the clutch at high revs and keep the boost up, but more in situations where i'm powering out of a roundabout or performing clutch-free downshift-less overtaking?

Because if there's not much difference in the real world, i'll play it safe and go the 0.82

The 0.63 will get you a lot more response over the 0.82 housing no question. The only downfall is the higher temps if you wish to run higher boost levels and you will most likely not feel the pull all the way to redline.

[Lithium]

IMHO the .63 showed its major advantage over the .82 below .63, I have had both and there is no way I'd go with the .63 again. With an old GT3071R I'd consider .63 possibly, but with the extra compressor flow of the GTX3071R I'd go .82.

[wolverine]

IMHO the .63 showed its major advantage over the .82 below .63, I have had both and there is no way I'd go with the .63 again. With an old GT3071R I'd consider .63 possibly, but with the extra compressor flow of the GTX3071R I'd go .82.

I read this three times Lith and I am no closer to understanding the first sentence.