[Supras] 57 trim turbo with clipped turbine wheel

[Jim Jobe]

OOOoooh I forgot about that - Steven's ebay special
turbine housing flange had a dip around the top of it.
Guess China copied it that well.  We filled the dip
with a Mig and smoothed it on a belt sander.  Probably
$20 US to have someone fix it for you.  So $170 for
elbow and downpipe vs what, $200 for a cast elbow from
SS?

On Thu, Aug 23, 2007 at 10:05:44AM -0700, cthommes at adelphia.net wrote:
> Did your Defcon have a warped turbine housing flange like mine did?  Mine was so bad (bought brand new years ago) that I had a 1.5mm gap at the top when the bottom two nuts were tightened.
> 
> Had to have it machined flat before I could use it...
> 
> -Craig
> 
> ---- Rockey Fox <supr91tt at yahoo.com> wrote: 
> > Installing the Defcon downpipe which eliminates the elbow altogether was in fact the biggest contributor to increased power. I don't think the Defcon is available any longer but I think Titan Motorsports makes one like it.
> > 
> > Rockey 91T
> > 
> > ----- Original Message ----
> > From: Jim Jobe <jjobe2 at supratech.org>
> > To: Dan Gyoba <dgyoba at abstractconsulting.com>
> > Cc: Patrick Golder <psg559 at yahoo.com>; "berniek at technicaldevelop.com" <berniek at technicaldevelop.com>; "Supras at supras.com" <Supras at supras.com>
> > Sent: Thursday, August 23, 2007 12:06:22 PM
> > Subject: Re: [Supras] 57 trim turbo with clipped turbine wheel
> > 
> > 
> > Yeah, replacing the elbow is a HUGE benefit.  Everyone I know
> > that has upgraded the elbow wished they had done it sooner.
> > 
> > On Thu, Aug 23, 2007 at 10:08:00AM -0600, Dan Gyoba wrote:
> > > On 22 Aug 2007 at 17:50, berniek at technicaldevelop.com wrote:
> > > 
> > > > Pat:
> > > > 
> > > >     There is plenty of meat around the disc wastegate valve.  Boring
> > > >     the 
> > > > turbine body 1/8 inch increases the area considerably since area
> > > > varies as the square of the diameter, but adds only 1/16" to the
> > > > radius of the hole.  There remains about 1/8" of an annulus for
> > > > wastegate valve turbine body to valve overlap.
> > > > 
> > > >        BernieK
> > > 
> > > Well, that's the square of the radius, not the diameter, which is different, but it's still a 
> > > logarithmic function, which is, I think your point.
> > > 
> > > Persoanlly, I think that getting rid of that huge blockage after the wastegate in the turbo elbow is 
> > > probably more beneficial, and probablhy adequate.  Boring the wastegate opening certainly isn't 
> > > useless though, and is a good idea.
> > > 
> > > Dan Gyoba
> > > '89 NA 451,732 kms, Turbo swap COMPLETE
> > > http://www.abstractconsulting.com/~dan
> > > 
> > > 
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> > 
> > 
> > 
> > 
> > 
> >        
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