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R34 Neo Turbo Into R32 Gtst

ademgim

By ademgim,
in Engines & Forced Induction

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ademgim Enthusiast

ademgim

Posted
Posted

hi all,

just wanted to know how much is involved in putting an r34 neo stock turbo into an r32 gtst, is it direct fit, eg oil and water lines, stock dump, basically everything that is involved,

If any input onto how much power i should make also with the turbo fitted, cooler, turbo back 3 inch, remapd ecu, and pod. And on how much boost would be safe and conservative. I was thinking round 13 psi.??

Also what should i be paying for one with minimal shaft play in good cond

Any help would be much appreciated to all parts of the question.

Cheers :(

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abu Grand Master

abu

Posted
Posted (edited)

Hey

Just a quick reply from me.

Will straight bolt on to manifold and dump pipe.

They are of similar size to the RB20 turbo so will fit in. Just make sure if you get the RB25 turbo you get the elbow off the outlet side of the turbo, as they are different to the RB20 one.

I recommend you use your RB20 turbo actuator as it holds 10psi and the RB25 actuators only hold 7psi? This will make it easier for you to hold higher boost in the future, without creeps and spikes (not guaranteed of course, but proven to hold boost better).

Oil and water lines will fit up as standard.

Expected power varies depending on supporting modifications.

Quick list of what you will need to achieve 175 - 185rwkw on standard RB20 internals;

-Fuel pump (WALBRO, Bosch 040, GTR)

-Front mount intercooler kit

-3" Turbo back exhaust

-RB25 turbo

-SAFCII + tune

About 14psi of boost would be the most I would run on a RB25 turbo, maybe 15psi if you want to push it.. but no more. After all it is a standard ceramic turbo.

That should easy get you between 175 -185rwkw, and safely.

If you took notice I wrote SAFC II up there instead of a REMAP. Reason for that being, weather you agree or not, doesn't bother me! :thumbsup:

1/ SAFC II can be switched off and you can run a standard fuel pump

2/ Live readings

3/ Cheaper

4/ Holds 2 fuel maps

No need to go REMAP, unless you want to upgrade to Z32 & after market injectors, so in that case an SAFC II cannot run after market injectors or a Z32.

You will need to go to a stand alone or a REMAP for that.. but for 13psi boost you don't need a Z32 or bigger injectors so no point wasting money on a REMAP for now.. maybe later down the track if you want to go bigger turbo, injectors, z32 then go with a REMAP.

Some say the RB25 NEO turbos are slightly larger than the normal R33 RB25 turbo, but I cant comment as I am not 100% sure. Maybe someone else has more information?

Hope some of that helps. If you do a search you will definitely find more information, or even take a look through the RB20DET Turbo upgrade thread in the Forced induction section. Will give you a good indication of expected power. :)

Thanks :D

Abu

Edited by abu
abu Grand Master

abu

Posted
Posted (edited)

Because I am nice, here is a link to a guide to installing a RB25 turbo into your R32 RB20DET.

Pretty straight forward, and also outlines all the tools needed to complete the swap

http://www.project32.net/tutorials.php

Enjoy! :D

Abu

Edited by abu
MANWHORE Grand Master

MANWHORE

Posted
Posted

I'll just add something that hasn't been said yet. In all the time that i've r + r turbos, I've only ever seen this once. Its very rare, and seems to be confined to the very early 32s. i.e. Jan/Feb 1989 - even march didn't have this issue.

The very early 32s had 22mm water banjos. The later 32s and 33s and 34s have 24 mm banjos. The water lines on the earlier 32s are different. If this is the case, you migh tneed the water lines too, or just the ends of the water lines.

Forged Experienced

Forged

Posted
Posted
About 14psi of boost would be the most I would run on a RB25 turbo, maybe 15psi if you want to push it.. but no more. After all it is a standard ceramic turbo.

just want to point out that you might not want to run more than 12psi on an RB25 NEO turbo. the plastic and ceramic parts of turbo will most likely fail at above this boost level.

abu Grand Master

abu

Posted
Posted
just want to point out that you might not want to run more than 12psi on an RB25 NEO turbo. the plastic and ceramic parts of turbo will most likely fail at above this boost level.

There is plenty of people running more boost than that on a standard RB20/RB25 turbo's.

Its more the luck of the draw with standard turbo's, depending on how well they have been looked after in the past.

Plenty of people running about 14psi on a standard RB25 turbo and making good power on RB20s. :wave:

Check the turbo before you put it in, make sure you try and get one with minimal play, and put good oil in your motor and service it regularly. It should last and do what you want it to.

Thanks,

Abu

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