Rear Housing Options

[wolverine]

I googled up some stuff that suggested that cartridge might be 48trim version so this is consistent with what you have Disco.

[ARTZ]

Its a 7 blade comp with .5 housing.

[GTScotT]

The -5 -6 -7 variations basically tell you which trim size its GT37 compressor has ie -5 was 48 trim , -6 is 52 trim and -7 is 56 trim .

I googled up some stuff that suggested that cartridge might be 48trim version so this is consistent with what you have Disco.

Neg Neg Neg. Disco is right, yet the actual code on this core is -15, not -5. To reiterate the full code is 700177-5015.

As stated I have a 3037 56T at home with the code 700177-5007, and its definitely not a 48 trim lol.

The problem I have at the moment is that Arthur is yet to let the cat out of the bag... There is a second RED GCG tag on the CHRA that reads "3071".... Either way, I am confident that it is a 60mm turbine, HOWEVER... Think it is a total cock up considering Arthur has already confirmed the compressor is 7 full blades and Disco has stated the GT series compressors should have 6 full blades..

All signs point to 700177-0015 , GT30 84T Turbine ....., TO4S 56T - as per the old Disco GT30 thread.

[ARTZ]

ok this is all the cat I can give you..

But so far i think you're on the right track Scott

[GTScotT]

Definitely convinced its a T04S GT30.

7 Blade compressor, big cover, 10 blade rear, garrett tag even says so..

F'd if I know why theres a GCG 3071 tag on it... If it was it would have a 6 blade compressor and a smaller comp cover.

[ARTZ]

Sounds Fair enough

so why did you call it the FAKE 3076?

Is it just an early version of a 3076 or something..

[GTScotT]

The fake 3076 implies it is the unit Garrett released in place of the 3037 while HKS held the exclusive rights.

Garrett still call the 3037 a 3076 so its easy to get fooled when buying one.. GCG have only recently started labeling the items as "AKA HKS 3037".

If you look up the GT30 threads on this forum you will see infinite talk about "Real 3076R" and "Real 3071R". This is exactly what it is talking about.

[ARTZ]

so its not excatly a 3037

but its not exactly a 3076

and its not exactly a 3071,

its not exactly a gcg and

its not exactly a garrett

Its not exaclty good but

its also not exactly bad

and to confuse things even more

its going to have a HKS housing

as well but its not exactly a HKS

Talk about multiple personalities

[WARLORD]

so its not excatly a 3037

but its not exactly a 3076

and its not exactly a 3071,

its not exactly a gcg and

its not exactly a garrett

Its not exaclty good but

its also not exactly bad

and to confuse things even more

its going to have a HKS housing

as well but its not exactly a HKS

Talk about multiple personalities

o boy its a bitsa lol

[discopotato03]

I am back home but my notes are in a cupboard next to she who kills if woken up .

I can't remember if there was a cropped turbine variant with the seven bladed compressor but my notes will tell me .

To those pics , the seven bladed wheel yes , I think Hitachi turbine housing , comp cover not sure but could be a sd boss T04E one .

For coolant lines I source SR20 banjo bolts and steel lines from wreckers , cheap and look factory .

A .

[Tangles]

definately same CHRA as my unit. visually the blades are identical.

mine has stock nissan 45v4 compressor housing which has been machined out to the fullest extent, 700177-5015 garret chra dual ball-bearing internal-wastegate, with AVO 'skyline 6-bolt' .73AR exhaust housing. Supplied with lines from Adelaide Turbo Services.

I really like mine

[ARTZ]

yeah I really like mine too, it may not be the best out there but it does go hard @ 235kw but i feel its choking which is why i originally considered the AVO housing as well when this HKS popped up a bit cheaper and should be better.

i beleive the backpressure caused by the rear housing is possibly hindering its spooling somewhat so dont think i will get any extra lag, It could be detrimental to its longevity at high boost levels. Plus i wouldnt mind some extra killerwasps wther or not this will work I can only try

turbo was fitted long ago disco with high temp coolant hose that hasnt failed me. I think finding out if its a cropped turbo or not is the big problem here so i know wether or not this new housing will fit, but i may just have to pull the turbo out and measure it up to cover all doubts.

[Dale FZ1]

the full code is 700177-5015.

700177-0015 , GT30 84T Turbine ....., TO4S 56T.

My parts listing has that CHRA available as cartridge only, with housings added per application. Critical turbine rotor dimensions are GT30, full size with exducer size 54.98mm. Same as a GT3037R. Compressor inducer dimension is shown as 57.15mm, vs 57.00mm for the 6/12 bladed GT3037R.

So: same turbine, different compressor spec when compared with the GT3037R 56T

comp cover not sure but could be a sd boss T04E one .

That's what it looks like. Not the larger TO4S 0.7A/R.

[ARTZ]

thanks Dale

[Dale FZ1]

I scored a HKS housing, i think its my best option and worked out about the same price as all the other options but I have no dump so I might have to invent one

will be interesting to see how much difference going from a crappy .64 to a quality .68 will make

Provided it is a GT30 Pro S housing, it should be a direct fit, and geared to match the turbine. Spool and total flow should surpass the modified Hitachi housing, so as a whole the thing should perform better than what you have. By how much is a difficult question, but it won't do as well as the high speed design GT3037R compressor.

But there will be some dicking around (and costs) associated with making it work. Custom dump (HKS won't sell you one, and the Aust rep will talk to you as if you are a knuckle dragging fool for asking - happened to me), rework the front pipe to suit, and WG actuator bracket to suit.

Poor scavenging and retained heat in combustion chambers due to inefficient turbine combinations can/does hurt power and reliability, so if you were looking at it as a whole then fine. But you'd have to look at the economics and benefits of changing the whole unit out before spending a cent.

Interested to see how things go.

[ARTZ]

I got a guy happy to fab up a dump,

thinking maybe work around a 3:5 inch bellmouth design then will probably just try run a 3:5 pipe to my cat.

i was going to run a flexi joint in between dump and front is this a good/bad idea?

Its a bit f stuffind around I know but im also interested to see how it goes, I can always change compressor if I get bored agin later .I was keen to stick a gtx comp in front of it but not getting much support there.

[Dale FZ1]

To be honest at the planned outputs a 3 inch dump will more than suffice. I've previously posted pics of my 3.5, works a treat but things are reasonably tight, and getting a spanner on to tighten everything while the engine is in the car was a mission. Smaller size won't compromise efficiency, and make life slightly easier.

HKS produced a shell-like design much like the Sydney Opera House. Takes two bends to make one dump, and it works. with that housing/flange setup. Probably not worth deviating from that style.

[DaveO74]

Hey Arthur this may help your fab guy

Pro s dump

Hope it helps

[ARTZ]

Cheers Dave, just looks like I bend over another as Dale mentioned..

I think the hardest bit will be cutting the top pipe to fit, but Scottnm35 who does my fab has skills and his own lab so I'm sure it will be a no-brainer for him..

[DaveO74]

Its not on the car yet so I could send you a cardboard stencil of the shape if it will help?