The turbo in the RS-X Gazelle should be a Nissan/Garrett T3 that uses a .48
turbine housing with a .3 compressor housing .The Skyline RS-X uses a .63
turbine housing with a .6 compressor housing. Although I've heard either turbo
can be found on both models but I've never seen this.The cracks in the turbine
housing will only get worse and lead to a leaking waste gate resulting in no
boost. This is a common problem but can be fixed by welding and machining.
Replacment housings aren't cheap especially the higher grade steel ones but
these don't crack.If the comp wheels been scraping the housing it could be
damaged aswell. Sounds like your up for a full rebuild. A lot of guys here use
second hand units from RB20DET and RB25DET Skylines as these will bolt on
depending what car the motors in. Some of these turbos are ball bearing and
feature ceramic turbine wheels and more advanced compressor design.The T25 From
the CA18DET and the T28 Turbo from the SR20DET would both require a different
exhaust manifold. The Cossies use T3 turbos so there should be plenty of them
available but i think they use a different bolt pattern on the waste gate flange
but this wouldn't be to hard to fit.A few turbo workshops in OZ import rebuilt
T4 turbos and components from England so you should be able to get one over
there cheap. But using larger turbos like these require after market engine
managment, larger injectors, intercooler etc. Or if you want 500HP fit a 60-1
turbonetics item and scare cossie owners to death. There's dozens of
combinations you can use and someone over there should be able to help you out
but i would go for an aftermarket computer.
Andrew Smith
[EMAIL PROTECTED] wrote:
> Hi folks,
>
> I decided to get on with getting my FJ20DET sorted out. It stared making a
> high pitched whine when it was cold so I took a guess at the turbo being
> buggered. I took it off today and sure enough the bearings have gone
> completely , the noise was the intake wheel rubbing on the housing. I'm
> gonna see if I can get it repaired but before I do I thought I run a few
> question by you all.
> 1) what kind of turbo is it? It's a stock Gazelle RS-X Jap model. Here's
> some pictures of it....
>
> http://www.btinternet.com/~ratdat/TurboIN.jpg
> http://www.btinternet.com/~ratdat/Turbo.jpg
> http://www.btinternet.com/~ratdat/TurboEX.jpg
>
> 2) should I get this unit repaired or is there a better choice of turbo for
> this engine? I'm planning to rebuild it completely hopefully with forged
> pistons and plan to run about 15psi and an intercooler.It has huge lag as it
> is now but this could be down to the turbos condition and the dodgy ECU. The
> 710SSS it's going in will run a 3.9 diff as opposed to the Gazelles 3.7 and
> will have smaller diameter wheels so maybe this lower gearing will reduce
> apparent lag anyway?
> 3) all our CA18ETs here have water cooled turbos...is this a good idea or
> even necessary ? Just wondered as the FJs isn't.
> 4) are there meant to be gaskets of some sort between a) the turbo and
> manifold and b) the turbo exhaust housing and the part with the wastegate
> mounted in it?
> 5) there are two very tiny cracks, one either side of the wastegate hole..is
> this okay?
>
> Bear with me on this...I'm entering uncharted territory!
>
> Cheers,
> Eddie
> England
> 510, KP710, B10, KB110,
> B110, B120, J710, H230,
> G620, P330, SRL311, C30,
> VBF10, E10, S12
> [EMAIL PROTECTED]
> pics at www.ratdat.com
>
--membersozdat-------------------------------------------------------
OZDAT Mailing List Please Note:-
Send (un)subscribe requests to [EMAIL PROTECTED]
Send submissions to [EMAIL PROTECTED]
No unauthorised redistribution of this email
http://www.ozdat.com/ozdatonline/index.htm
http://www.ozdat.com/ozdatonline/listindex.html
http://www.mail-archive.com/[email protected]/
---------------------------------------------------------------------
