Garrett Gt3071r

[dangerman4]

im concerned that you mentioned it will retain the same nissan exhaust housing dump pattern just rotated slightly?

how does that work?

have they made a spacer thats not flat? so it kicks the turbo up on a angle?

or is it some recast version of the standard housing that they have modified to suit.

also you mentioned it uses the stock oil and water feed. sounds like a high flow!

i have a feeling that this is very similar to my original turbo, which was a gt3071r-sp

and worked ok up to around the 270kw mark. the fact that im running a auto shows that its potential is around the 300kws on a manual, but that was the limit of its exhaust housing design and would not produce any more power no matter what we tried. it just hit the wall.

i was lucky enough to get my hands on the first gt3582r-iw released in Australia, and have never looked back.

the power delivery and just general feel of the turbo are so much nicer.

so anyone out there in SAU if you contemplating a new turbo go straight to a gt3582r-iw if you want to make over 310kws or if you have a standard engine go straight for a original 3071 with the propper garret housing. at least if you blow your engine and then rebuild a 3582 will bolt straight on down the track so you can then make more power.

theres nothing worse then paying to upgrade the same things over and over again.

upgrade it once and do it properly. you will save your self a fortune in the long run

[Dale FZ1]

it would have to be something pretty effective and convienent to separate me from my money .

Adrian what will you actually shell out for, now that you've been running the R33 for some time? And when? - I'd like to see/hear the results of your own upgrade.

[discopotato03]

Yes my thoughts exactly .

Its hard to imagine a turbo in the exact same location as a std R33 RB25DET using the same hardware not struggling possibly at 270-280 Kw outputs . By this I obviously mean a GCG Hi flow type set up .

To go much beyond this means physically larger turbine and compressor housings and to keep them off the exhaust manifold means the turbo has to move sideways via a spacer or a turbine housing with a longer "kneck" so to speak .

I don't want to pour cold water on anyones projects but I think the most practical outcome is adapting to a dimensionally same/similar range of turbos to suit a popular car/engine that covers a wide gas flow - potential horse power - range .

Thats why I mentioned the two GT30R based turbos and the GT3582R . Admittedly the GT30 based ones use T04E series comp covers and the GT3582R a T04S type (larger) one . If you wanted to future proof the thing you'd space it to suit a GT3582R knowing that it would bolt up if the means arose to slip an RB30 under your current (or alt) cylinder head .

This way all the plumbing and dump pipe is fitted and you know you have everything covered except minor air pipe alterations for the T04S comp cover if you upgraded to the bigger turbo at a later stage .

I think do it once and do it leaving future options open , I doubt it would cost much if any more this time but down the track very probably if you go further .

Cheers A .

[dangerman4]

I dont know much about this topic at all, I am simply acting as a middle man to pass on potential interest.

GCG highflow is journal bearing too and a lot laggier than what I have seen from my own car.

There was talk about being able to put a larger core into the setup that I have because I mentioned an engine rebuild (which I will be doing over the next 12 months), so when I go over the efficiency of this current setup, they said it would be lots cheaper to upgrade...Again I am not sure on exact details.

what?

now im confused...

are you saying that your current hybrid is bush bearing?

because gcg mainly make ball bearing highflows.

the 3071r-sp that i had was running the larger gt30 core and i was still maxed out at 270 kws.

so i wouldnt go throwing money at them to upgrade the core for very minimal results.

and the other thing is if the turbo you have is so great why would you want to upgrade the core?

If the air cant get in and out thru the exhaust housing quicker a bigger core could see your results go backwards.

If you factor in the purchase price of this "bolt on kit" and then decide to upgrade the core, which means new water/oil lines

plus uninstall reinstall, you find the cost out past a hks 3037. and you will still be running a basterderised hybrid

lol was that a word?

[dangerman4]

Ok cool

do you have any pics of the turbo itself?

[Trooper]

No pics of the turbo off the car, can take some of it installed, and when the first batch are done in the coming weeks, obviously we will be taking lots of photos...

Ok cool

do you have any pics of the turbo itself?

["EN4CER"]

Anymore news on the group buy? Trooper

[Dale FZ1]

Post it up for all to see. I'm interested in the results.

[Adriano]

I think a few people would be interested in the CHRA number. Its stamped on a little plate on the centre housing.

[Trooper]

Post it up for all to see. I'm interested in the results.

I will get CHRA # soon, will be taking photos in the next week or so to put together all the details.

I know the little plate you are talking about.

[dangerman4]

why is the power dropping off at 6500 rpm?

is this the max flow of the exhaust housing?

im not disputing its a nice graph, but a few of the figures at the bottom look like they have been fudged a bit.

im curious if you were to pump more boost into it whats the detonation levels like?

regardless it looks like a good thing on a internally standard bottom end.

[Trooper]

why is the power dropping off at 6500 rpm?

is this the max flow of the exhaust housing?

im not disputing its a nice graph, but a few of the figures at the bottom look like they have been fudged a bit.

im curious if you were to pump more boost into it whats the detonation levels like?

regardless it looks like a good thing on a internally standard bottom end.

Power is dropping off because thats is when the tuner released throttle.

We have not reached full potential of this turbo, tuner reckons it has more to go, but on a stock bottom end I did not want to push things.

When my new engine is built, I will up the boost a bit and see how things go.

[-33-]

Power is dropping off because thats is when the tuner released throttle.

We have not reached full potential of this turbo, tuner reckons it has more to go, but on a stock bottom end I did not want to push things.

When my new engine is built, I will up the boost a bit and see how things go.

No doubt thats a nice graph, I'd be very very interested in the specs of this mystery turbo when they do come out, and of course what is in this "bolt-on" package. If it is indeed that good im suprised HKS hasn't snapped it up (although it seems the 3037 is in that power-figure ballpark anyway).

[dangerman4]

can you get the tuner to print out a full graph from 0 to 300kws on the side and from 0 to 180 kph on the bottom.

the graph will look very different.

then we can see where its strong points and week points are.

thanks

my full graph attached.

[dangerman4]

Why will it look different with speed instead of RPM down the bottom? Originally he was giving me speed on the bottom axis, but I asked him to give me RPM to show more accurately when the turbo was coming on full boost.

On the side it is 0-314kw, I am not sure I understand what you are after.

I live up in Cairns now and wont be tuning the car again until I get my new engine done. I might throw it on a dyno up here just as a comparison though.

When my mate gets his tuned, I will see if he can get kph, although I think RPM is more useful.

no on the side of your graph is around 80 kws up to 314 kws and then 2600 rpm up to 6500rpm

it all most looks like he has zoomed in to a full graph just to make the power curve look beter.

[Trooper]

no on the side of your graph is around 80 kws up to 314 kws and then 2600 rpm up to 6500rpm

it all most looks like he has zoomed in to a full graph just to make the power curve look beter.

Correction - You are right (sorry was late last night when I was looking at this).

The scale gives MORE detail not less.

Anyway I am not going to argue about this, next time the car gets dynoed I will ask for a 0-300 and 0-7000 rpm scale.

[MR.E]

Hi guys, my first post on here im from the UK, thought id give something back in return for all the great technical information I've got off this site.

Sorry to bump an older thread but it seemed pointless starting a new one. In answer to the thread topic, I bought the advertised turbo from tweakit at the same time this thread was started. I havent had it fitted yet but I thought some of you might want to see what it is they are selling. I will attempt to add some pics!

I double checked all the advertised sizes with them before shipment but on arrival it was different. It was advertised Compressor Housing A/R -: 0.70a/r but it is actually 50a/r. After informing them they have updated the website with the correct information.

Sorry for the poor quality of the pics, they were taken on a webcam inside the lid of my laptop so hard to get a good angle etc

The only badge on there is "GCG AC687 p/n GTST- GT3071R"

It will be being fitted in the next few weeks hopefully, I have bought all the parts and engine was rebuilt last year, spec will read something like..

RB25DET

wiseco forgies

emanage ultimate, no afm

fmic

aftermarket exhaust

decat

downpipe

steel headgasket

tomei poncams

550 injectors

walbro fuel pump (though im thinking of changing this)

I think n1 oil pump was fitted but cant quite remember!

Any feedback on the turbo I've bought would be great, I will post up my results when its all complete.

Edited June 3, 2008 by MR.E

[BHDave]

looks like the same as simonr32's with a hpc coated turbine housing. The gcg badge pretty much confirms tweakit are on selling the same turbo.

So it'll be the .71 OP6 copy turbine housing with the cropped turbine, which is not necessarily a bad thing. Simon certainly got good results from it.

It looks to be a decent sized waste gate flap too.

[W0rp3D]

looks like the same as simonr32's with a hpc coated turbine housing. The gcg badge pretty much confirms tweakit are on selling the same turbo.

So it'll be the .71 OP6 copy turbine housing with the cropped turbine, which is not necessarily a bad thing. Simon certainly got good results from it.

It looks to be a decent sized waste gate flap too.

I have emailed them previously about the housing, here is a cut n paste from the question i asked and the reply i got:

Question:

I am thinking about getting one of these, on the bottom it says that it is available with an RB25DET exhaust housing, was wondering if it is also available with a VG30 (OP6) single turbo exhaust housing, from what i know its the same as the RB25 but is a .8 not .6, if it is how much would it be, if not how much minus the exhaust housing but to suit an rb25 exhaust housing.

Im basically looking for that turbo with the bigger .8 exhaust housing, internal gate and straight bolt on without the need to have a custom dump pipe made.

Answer:

We now use a new casting specially made that is better than the vg30. it is rated at .7 a/r which I understood to be more than the VG30. It has the 6 bolt dump pattern and t3 flange.

[MR.E]

Well I said Id post up with my results but its not what I was hoping for. Turbo's now fitted but we cant keep the boost down. I run a profec 2 EBC and its boosting way too high. The EBC has now been disconnected so its running with just the actuator but the boost just keeps rising, seeing it go upto at least 1.4bar and would probably keep rising if I tried

I have emailed GCG who said they never run into boost issues. Heres their reply........

"There are a few things you need to check in order to eliminate some possible scenarios.

*Blocked Catalytic Convertor causing excessive exhaust back pressure.

*Broken/Split Vacuum hose from actuator to pressure source.

*Too much pre-load on the actuator rod

*Actuator rod bent and possibly catching on the bottom of the cannister/bracket.

The reason I ask these questions is that we fit 38mm wastegate flappers to these turbochargers, which we also fot to XR6T turbos, and we never run into boost regulation issues. The only other thing you can do is pull the actuator off the turbo and bring it down for testing."

Anyone else got any other ideas? Theres no CAT fitted and no split hoses

Would appreciate any pointers as I'm in the UK so theres not much hope of me popping into GCG personally