Andrew/List?
I have an unusual turbo here I purchased on the weekend. It is a T3 water
cooled with very large 5/8" ID water inlet & outlet. The turbine housing is
a 0.8 A/R (I assume) with a large wastegate cover with six retaining bolts.
The dump pipe has an O2 sensor fitting hole and the shape looks rather like
and over sized FJ dump pipe. The exhaust housing has F59S cast into it?
The comp housing is a Nissan and the comp wheel is a dual start approx the
same size as a stock Z18ET.
Any ideas at all any one
Cheers
Feral Errol
mailto:[EMAIL PROTECTED]
http://www.datrats.com.au/
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of andrew smith
Sent: Wednesday, January 31, 2001 1:14 PM
To: [EMAIL PROTECTED]
Subject: Re: FJ20DET ex manifold
Eddie,
Those Cossie style wastegates certainly simplify the exhaust side of
things.The
303-61-L turbine wheel is larger in both major and exducer dia than the
standard
wheel and is of a better design which allows more gases to be passed thru
housing and reduce back pressure when larger compressors are used.These
wheels
also have the ability to work over a wider range.There is larger T3 turbine
wheels available and a good turbo tech man should be able to advise of at
what
point a larger wheel is needed to match comp size and engine size.Standard
turbine wheels can be back cut to around 7 deg when larger compressors are
used
as this also reduces back pressure but this is not considered good practice,
although I've just done it to mine as it's cheap ($150 including balancing
verses $600 for a new -61).I've used this with a T4 -25 (V trim) comp wheel
and
housing ($100 used).Should be good for 300-350HP.This is old technology and
I've
only done it this way because of budget.If I had the money I'd use a 60-1
comp
wheel with suitable turbine wheel.
Andrew Smith
[EMAIL PROTECTED] wrote:
> Andrew,
> Luckily I found a local turbo specialist that's run by an Aussie! He knows
> FJ's and 1600's (nobody else here has heard of either) and he's built an
FJ
> to 500hp+ in a Mazda for drag racing before (in Aus not here...think it
was
> a series 2 RX7). I'm going with a modified T3 from an Escort Cosworth with
> an integral wastegate (wastegate is in the housing rather than the dump
> pipe) and a 360 deg bearing. I'll get the exact specs off him and post
> them. I said I wanted a capability for 300-350hp (@ flywheel) although I'm
> not likely to run that much on the street right away, but I want the
> potential there for the future without needing a different turbo and
> therefor possibly a different exhaust.
> The built in wastegate on the Cossie turbo simplifies the exhaust a bit as
> the system will now be fabricated right up to the turbo housing so the
idle
> clearance is no longer a problem.
> I'll ask when I go back there about _61 turbine wheels. I'd imagine they
use
> them. What's the difference?
>
> Eddie
> England
> 1969 510 4door
> [EMAIL PROTECTED]
> www.ratdat.com
>
> ----- Original Message -----
> From: andrew smith <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Tuesday, January 30, 2001 2:37 AM
> Subject: Re: FJ20DET ex manifold
>
> > Eddie,
> > What turbo are you using, still the T3? How did you go with that idler
> clearance
> > problem? Hope you had the turbo high flowed.Having another manifold made
> can be
> > quite expensive and making it yourself can be time consuming.A lot would
> depend
> > on what HP you turbo is rated at or if you intend to go bigger later
> although I
> > think the standard manifold is capable of flowing enough for at least
> 400HP.Any
> > more HP than this I would be looking at an external waste gate type set
up
> and
> > therefore another manifold.The standard manifold will keep air speed
high
> and
> > combine with the high exhaust pulses the FJ20's produce allow for quick
> spool
> > up.A larger dia manifold is usually used when ultimate HP is being
chased
> or if
> > the standard one is to small or if you change to different bolt
pattern.I
> ran a
> > TB34 400HP unit on an FJ20 with no back pressure problems at all.Theses
> units
> > were designed by Nissan for there domestic racing where no external
waste
> gates
> > were allowed and standard manifolds retained. These turbos featured a
> turbine
> > housing with a larger nozzle area and a -61 turbine wheel. These are
only
> my
> > experiences anyway maybe some others have had problems with the standard
> > manifold.While you were getting your turbo done did you come across any
> > workshops with any used -61 turbine wheels as I think thats what they
used
> in
> > the RS500 Cossies.
> > Andrew Smith
> >
> > [EMAIL PROTECTED] wrote:
> >
> > > I'm wondering what the limitations are in respect to power potential
> using
> > > the stock exhaust manifold on my FJ turbo( It's a Gazelle RS-X
> manifold). Is
> > > it worth me getting an aftermarket one now? The reason I ask is
because
> I
> > > get my new turbo this week and them it will be time to get the exhaust
> > > system fabricated. I don't want to have to have it done twice if I
find
> I
> > > need a better manifold in the future. I'd rather just spend the money
> now
> > > and do it right. Any idea, anyone?
> > >
> > > Cheers,
> > > Eddie
> > > England
> > > 1969 510 4door
> > > [EMAIL PROTECTED]
> > > 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]/
---------------------------------------------------------------------
