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Thinking Of Upgrading The Stock Turbo, Need Help!

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Not sure if i am posting in the right section.. if so please tell me..,

I'm kind of new to this forum, but have heard its good for information and opinions..

I currently live in Perth WA,

I own a Series 2 R33 Gts-t with the following mods

Blitz EBC ~ 12.5psi (with quicker spool up) & turbo timer & boost gauge)

K&N Air filter (with pipe leading under for better flow of cold air)


Splitfire coil packs (with spark plugs gaped to 0.8)

Turbosmart BOV

Full exhaust system 3.5" from dump to cat, then 4.5" cannon.


Pulls pretty good for what it is but still not enough for me and sort of have an idea of what i want to achieve high 300's in Horsepower

I have been doing some research and wanting to go for a Garrett GTX3071R- 56T Turbo,

with Hi - Mount manifold possibly a 6-Boost one with a Mines 44mm External waste-gate with screamer on it...

I'm going to Buy these in order..

Garrett GTX3071R- 56T turbo

6Boost Manifold

Haltech Platinum pro plug-in R33

*All ready have Mines 44mm ex waste-gate*

Fit everything also extending dump pipe..

Then get it tuned.. once fitted


First question, is it a good responsive turbo for the power im seeking, what would it give out to me?,

The site i am buying the turbo off said ***sold without a turbine housing*** on GCG, does anyone know what size or thing i need for this as this is the biggest part im stuck on...

Is it good with that manifold and to be ex gated?,

Would it be necessary to buy Bigger Injectors? e.g 550cc injectors or larger?,

Can i high mount with all the crossover pipes n shit still there? or?

Is heat wrap necessary?

What boost Level would be a good for what i have, to be safe?

is the 44mm mines ex waste-gate suitable for it?

I know screamers and BOV's are illegal and can get yellowed for them so i don't need any comments about that, i currently have faker screamer (split dump) and the BOV on and have had no problems so yeah i am just after that info ^...

Thanks guys, appreciate any help :P

Brandon, :cheers:

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Am pretty sure there are a few things you havnt considered, plenum , throttle body, inter cooler with larger inlets and piping, dump pipe , fuel pump, fuel pressure reg, possibly a clutch.

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