Turbo Upgrade

[Furiuz]

hey guys

am looking at upgrading turbo shortly. However am trying to keep the car as legal as possible in regards to old regency. obviously having a turbo the size of a VW beetle in my car is gonna be a no no but are there any alternative turbo upgrades for an rb20 that are legal?

was thinking along the lines of high flowing either an rb20 or vg30 turbo or throwing on an rb25 turbo. would these still get through regency?

[Cubes]

No upgrade is legal.

A highflow is not as obvious but one with a trained eye can still pick the difference.

[cruzin33]

what is the visual difference between a high flow and a stock turbo?

[Cubes]

Depends on the highflow.

Generally the core, the comp cover back plate.. depends on how it was highflowed what bearing type it uses etc.

[cruzin33]

What is the size of the outlet on the VG30 turbo? Iv been told its 3inch compared to the rb25 witch is 2.5 inch

[Cubes]

The VG30 turbo is nothing more than an rb20det turbo with a r33 compressor cover to suit; you use the r33 90degree elbow on the vg30det turbo's when putting them on the skylines.

In short.. They are a crappy lazy feeling turbo.

Go the Rb25DET turbo with the smaller .6 rear and larger compressor wheel. The .6 rear is fine for the power levels the compressor is able to provide air for.

[erwin_skyline]

to my exprience my sugestion would be just upgrade to Garret turbo .

[Deluxe]

Hi flowed RB25 turbs is pretty damn good!!

[skyline.]

how much does it cost to get a RB25 turbo high flowed

[Cubes]

~1-1.3k for journal bearing and 1.7-2.2k for roller bearing.

Mate of mine had a MTQ Journal Bearing RB20 highflow and it punched out 228rwkw on 16psi; spools damn close to the stock turbo and considerably better than a std VG30DET turbo. Quite an amazing little turbo that thing.

[Deluxe]

Yeh mine is at least 5 years old, was done by the previous 2 owners ago at ATS and last dynoed a month or so ago at 12psi it pulled 218kw!

Thats is pretty good out of a RB20 turbs there Cubes! Hi Flows are good for a decent powered street car!!

[cruzin33]

What about a Vg30 Housing on a rb25 high flow any good?

[Tangles]

What about a Vg30 Housing on a rb25 high flow any good?

that, from Slide, was called a Stage3 max-oversize highflow

good for 260rwkw

whereas, again from Slide, a stnd oversize highflow was rated only 10psi less at 250rwkw (what I have)

great turbo. pity he no longer does them

water and oil cooled 360deg thrust bearing. a rare combo, and damed best price in sthn hemisphere

[GTS_Retro]

i would go the rb25 for sure cheap and easly available going hi flow is a cost but if you search the forum people seem to get awsome results. also the turbo has nissan on it so i doubt seeing that the inspectors at regency would then investigate further.

[Elliotws]

im not a fan of the stock rb25 turbo being high flowed. i was runing around 14psi and mine shat itself mostly because of wear and tear. i got a gt30 stuck on, my dyno read out was 280.8rwkw and its no so agressive as the stock high flowed turbo, but created heaps more power. has any one else had the same kind of experiance?

[Cubes]

GT30r is a great turbo.

Im extremely happy with mine and has plenty more left in it. Up to ~340-350rwkw with water meth injection and ~310-320rwkw on pump with cams.

[Elliotws]

yeah im pretty happy with my gt30r, simon at morpowa said it was more responsive than the gt35 which i was thinking about gettn, ive only had it back a couple of weeks. ive limited the power to 280rwkw tune coz ive still got stock internals. once all that is sorted like you said im hoping for around 340rwkw

[cruzin33]

Do you have a pic of the gt30r bolted on

[Cubes]

yeah im pretty happy with my gt30r, simon at morpowa said it was more responsive than the gt35 which i was thinking about gettn, ive only had it back a couple of weeks. ive limited the power to 280rwkw tune coz ive still got stock internals. once all that is sorted like you said im hoping for around 340rwkw

As you have 340rwkw in mind I'm keen to know your path of mods.

Plans for cams, exhaust manifold and plenum?

Are you running the WMI? external gate? .82 housing?

I wouldn't mind having a crack at 340rwkw with the std inlet manifold/plenum, std exh. manifold but with a set of mild cams.

Water Meth Injection is the key I believe as the std exh. manifold caps power around 300rwkw; by improving the combustion effiency (Water Meth Injection) I will be able to pick up 30-40rwkw and keep it all stock looking and running in to the 10's with a set of slicks hopefully.

Very keen to see if it pans out; if not I'll be forced to strap on an aftermarket exh manifold.

-----

crusin33,

Mine pretty much looks like a stock R32 engine bay, stock airbox included but with a 100mm cai in to the inner left bumper. Looks stock.

The turbo is an internal gate .82 hanging off a 10mm spacer so its all hidden. I even have the std turbo heat shield.

I've been meaning to grab some decent pics so will do soon.

[sinistaGTR]

gt3040 ftw you wanna see a pic check out my for sale thread