Andrew,
Its definitely 0.8 that is what has thrown me!!!
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 9:05 PM
To: [EMAIL PROTECTED]
Subject: Re: FJ20DET ex manifold
Errol,
I have no idea what its off.Sure its a 0.8 or is it 0.82 A/R.
Andrew Smith
Errol Smith wrote:
> 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
> > > >
> > >
> > >
> >
>
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