As we all know the gt30 greddy upgrade requires hammering the firewall/cutting bs

What if we get this
Garrett GTX3076R Forged Billet Turbo [803713-1, 700177-42] - $1,227.00 : Himni Racing, Turbocharger, Turbo, Garrett, Turbo Kit, GReddy, Mazda RX-7, HKS, Apexi, TiAL, TurboXS, TurboSmart, Flange, Turbonetics, Exhaust, Intercooler, ACT, Intake

Selecting the compact rbt 2 bolt inlet/outlet

and pair it with this turbine housing

Kinugawa Garrett GT30R GT3037 GT3076 AR61 8cm T25 Turbo Turbine Housing | eBay

A/R and turbine sizes match up...

The question is the length of the CHRA...

I think that the greddy manifold is more restrictive than the t25 footprint itself so there is really no benefit in going up to a T3, but I am up for discussion.

Anyone know where these compressor housings can be sourced by themselves?

 

Are you talking for use on the Greddy manifold?

 

Yes, sorry I wasn't clear ... updated op for clarity

 

Sounds good - think it will take someone to take the plunge to find out - doubt anyone on here can give you the answer.

But yeah - perfect sized turbo for us IMO.

 

I may take the plunge ... just worried about the chra being longer than I can fit with the mount bracket/manifold runners ... willing to help me tune it, brett?

 

Definitely won't be 100% bolt on.

I can't comment on this specific setup, but I have a hks garrett turbo with a t25 turbine housing and a compact compressor housing. The flange on the downpipe will be short using the garrett turbine housing, the bolts also didn't line up exact for me. You won't have to hammer the frame if you don't space the turbo up from the manifold, but then your compressor housing may not clear the center manifold runner (pending the chra length of course). It may not clear it either way without some grinding of the manifold or compressor housing.

It's possible to do, but you will definitely have to make it fit. With that said, I say go for it. It's a perfectly sized turbo.

 

Thanks for the input ... gotta look on their return policy

 

You would be better served pursuing a Comp Turbo derivative

 

Thanks! Could you elaborate a little further?



hmm ... I could always build a downpipe .... I have an oe header and a complete disassembled engine laying around.

Shouldn't be too bad with this....



http://www.godspeedproject.com/t25-t...ptor-clamp-set


making the oe hanger shouldn't be too bad either

and would make installation easier!

 

Another option: one of these guys: m8262


http://www.tomei-p.co.jp/_2003web-ca...ms_rb26-e.html







ARMS M8260
Compressor:
Trim: 60
Ind: 52.6
Exd: 76.2
Blades: 6/6

Turbine:
Trim: 77
Ind: 67.0
Ex: 58.8
Blades: 11

Comparison to OP
GTx3076
Compressor (billet):
Trim 58
Ind 58.0mm
Exd 76.6mm

Turbine:
84 Trim
Ind 60mm
Exd 54.5 (according to my calculations)

 

I have looked into this a bit. Just make sure you keep an eye on the engine mount and bracket. If you having one laying around bolt it up when you fit everything.

 

Why do you would this work with the Greddy manifold?

 

Because the turbo greddy uses is the one they offer for their skyline upgrade but clocked?

I have a blown block and in the process of acquiring a bracket.

 

You can't clock the compressor housing without re-fabricating the waste gate actuator bracket. Not to mention you will have trouble with the center section position as well so you will have to shear off the pin, etc. And if it's water cooled you have to account for the position of the water lines and how they go in and out of the center section. And then clocking the center section is not really possible with the Greddy manifold because of the oil drain line.

It gets complicated, we had to remove the freeze plugs on my center section and I had to have those hose threaded and I had to block off the opposite side ones. We had to do the same on Shady crews turbo but he used a aftermarket compressors housing so that added a few more complication to the matter but he got it situated.

 

Thanks for the info!

Did he use a 2 bolt in/out?

 

Based on the compressor maps on Garrett's website, it looks like the GTX3071R would be a good choice. The GTX3076R isn't that efficienct at the low boost levels that most people run. I'm still in the planning phase for my setup, but I think the GTX3071R is the way to go, you get GT3076R flow with a smaller and lighter compressor wheel which should equal quicker spool up.

 

I agree in principle but it does depend on what your goals are . The GTX3071R is too small if you are looking for 350whp+ but is hands down the best choice for quick spool and 300whp.

 

You may be right, but I think it will flow enough to hit 350whp+ based on the compressor map if you are willing to run higher boost pressures.

 

It will get close at it's extreme limit -certainly not ideal.

 

Yeah if only 350WHP reliably were possible on a Renesis.

 

Of course it's "possible" . We just need the right formula .

 

I dunno man, only time will tell I guess.

 

^like you always say...it's in the tunning.
I will aim for 350whp when i eventually go turbo but I also want to match up my turbo build with a good engine build. A combination of tuning and a good engine build are key.

 

wow 2 posts before i even finished mine...

 

It's all about the details. I think Hoss-05 has the best recipe but it won't happen on this engine (reliably anyway). But I think his setup with Pettit built engine built for boost and a Steve Kan tune would get there with reasonable reliability (30k or so at 10-12psi). We shall see.