New-ish Gcg 3071 Based - Gtst Turbo

[simpletool]

Hi Guys,

So has anyone had any experience with the new (I presume) GCG turbo for the RB25?

GCG code = XTR-GTST-GT3071R

specs are based on cropped turbine garret 3071 in a 0.7 rear housing that bolts up to standard dump.

XTRGTST-GT3071R 700177

front = 71.0mm 56 0.50

rear = 56.5mm 84 0.70 Int-Wastegated

My fears that this turbo would boost creep like the 3071 with the 0.64 rear housing?

Purpose would be for a stock RB25 running 0.9 to 1.0bar. Goal is to achieve ~ 230rwkw with wide power band.

Would the 0.7 rear housing be large enough to allow this flow without boost creep or being too sensitive to throttle ?

On another note what is the A/R of the stock R33 rear housing?

[Munkyb0y]

i just enquired about this turbo. they dont do it anymore. this is GCG's response.

We don't do that turbocharger anymore as we found the GTS-T style exhaust housing was too restricting when pushing over 15psi of boost. We use a genuine Garrett exhaust housing and supply a dump pipe with the kit.

Edited April 23, 2009 by Munkyb0y

[simpletool]

Suspicions confirmed then thanks Munkyboy.

You get a price for that kit?

[Munkyb0y]

yes i did lol

Total price on this kit is $3070.00 Inc GST. This uncludes:

-GT3071R Turbocharger (450hp)

-20mm Spacer Plate

-Gaskets

-Studs & Nuts

-Silicon Elbow 2" to 2.5" 90 Degree

-Oil & Water line kit

-Stainless Split Dump Pipe to suit factory or aftermarket front pipe.

The ONLY thing you need to do after fitment of this kit is make an air inlet pipe.

[TheProDaniel]

i just enquired about this turbo. they dont do it anymore. this is GCG's response.

Just got the same quote lol. Looks like the high flow is more in my price range now.

[_Ryan_]

LOL I rang them about the same thing today, 3071 or 3076 for $3070 complete kit(except for intake pipe)

For your aim get hypergear or someone to put a GT2871 52trim CHRA into an r34(OP6) housing! around 1550 bolt on

Edited April 23, 2009 by Ryan1600

[Tangles]

http://www.modyourcar.com.au/rb-nissan-spe...ing-turbo-p5224

gt3071r or 76r

6-bolt exhaust housing

$2150 plus lines

[simpletool]

$3070 is a bit rich.

I'd really like a 3071 with 0.82 internal gate rear. I'm thinking that 230rwkw would be really pushing a 2871.

[R31Nismoid]

$3070 is a bit rich.

I'd really like a 3071 with 0.82 internal gate rear. I'm thinking that 230rwkw would be really pushing a 2871.

Once you factor in a spacer, dump pipe and so on, its actually pretty decent pricing and a true bolt on.

1500 for a hyper gear (if its bush bearing) vs 2100 (ball bearing) - no braining where to spend the $$$

[_Ryan_]

Once you factor in a spacer, dump pipe and so on, its actually pretty decent pricing and a true bolt on.

1500 for a hyper gear (if its bush bearing) vs 2100 (ball bearing) - no braining where to spend the $$$

1500 for a BB 2871 52 trim AKA GTRS SPEC, not the hypergear core, a garrett core... which should do 230 easy

hypergear spec starts at 800

Edited April 23, 2009 by Ryan1600

[badhairdave]

simonr32 ran one with very good results.

There were slight creep issues which were resolved by opening up the port slightly (retaining the same flap from memory) and possibly changing the dump. he made somewhere in the 280rwkw range.

Overall they are a good unit, same cart as the hks 2835 proS.

If you are going the uncropped turbine 3071 and want to retain IW then .82. Don't .63 it.

[_Ryan_]

simonr32 ran one with very good results.

There were slight creep issues which were resolved by opening up the port slightly (retaining the same flap from memory) and possibly changing the dump. he made somewhere in the 280rwkw range.

Overall they are a good unit, same cart as the hks 2835 proS.

If you are going the uncropped turbine 3071 and want to retain IW then .82. Don't .63 it.

yeah when GCG did those they were almost identical to a 2835...

[JonnoHR31]

$3070 is a bit rich.

I'd really like a 3071 with 0.82 internal gate rear. I'm thinking that 230rwkw would be really pushing a 2871.

MTQ engine systems can hook ya up and fit a larger gate aswell. i have no boost control issues with a .82

[Tangles]

Ive left it in ATS's hands to build my garrett gt30 using a large 6bolt nissan housing (modified op6 I think) and front 45v3 housing, highly modified plus longer snout

they rate it at 270rwkw and stated several times on different days, different employees, that it had FAR less lag than the GCG equivalent highflow turbo.

will post specs and details when I get the GT30 next week with new lines.

[simpletool]

Yeah I've pretty much settled on 2871 based highflow in OP6 housing. Now I'm looking around for an OP6 housing - it's taking some looking that's for sure.

A mate had 2 of these about 18months ago....sold both.

[existence]

i just bought one of these off CRD

* Garrett GT3071R with 70mm inlet and 0.64 A/R turbine housing (genuine Garrett housings)

* T2 to T3 flange adapter flange / turbo spacer

* Gasket kit

* T3 gasket

* Stud kit turbine inlet

* Stud kit turbine outlet

* Oil drain tube and gasket

* Oil drain hose

* Hose clamps

* Oil inlet fitting

* Copper washers

* Actuator bracket

* 12 psi Actuator

* Oil lines

* Water lines

* Water line adapter fitting

* High temp ceramic coated twin outlet dump / engine pipe suit Garrett turbine housing

TOTAL KIT PRICE $2470.00

and the silicone elbow for another $100. its a modified gt3071r with all the genuine garret housings, CRD have tinkered with the housing sizes and they say have found the best combo for an rb25det! lose practically no response and gain a shitload of power! iv ordered one and should be here within the week!

[skylinecouple]

I have the 3071 with .82 housing and have maxed out the compressor at 264rwkw. Sure, there may be a couple of kilo watts in there still but that's pretty much all you'll get. The modified RB25 turbos are vastly overated and I only wish I could have all my money back over the three years I spent trying to get the 250-270 kws everybody said they are good for. They are crap. Not just me either as I have spoken to others that failed to hit more than 220-230.

Daniel I hate to say it but I think your going to be so disappointed in that turbo as it is not much different to the standard turbo. Existance, your on the right track but you will realise that there may be issues with boost control with the .64 housing. If you can get them to open up the wastegate and install a bigger flap. That turbo should be ok for 260 but the turbine housing is the limiting factor. With the bigger wastegate it will flow more exhaust and be fully capable of maximum compressor flow.

[existence]

really? how can the smaller housing cause boost creep? i did so much reading before i paid for it and didnt find anyone with this problem.

the guys from crd said they had done alot of testing and fiddling etc. surely they would have noticed something as serious as boost creep?

iv got all the supporting mods to hit 250rwkw, that is my goal for 16psi and ill be happy

[existence]

apparently the nissan rear housings or whateve the dodgy ones were were the ones causing boost creep, garrett genuine housings hold boost fine?

[wolverine]

garrett housing have been known to creep.

i don't understand why CRD have gone for a T2 based housing but since they seem to have done some testing it is hard to bet against them until the results come back.