[s-cars] RE: K27/K26-6

[Paul Gailus]

The GT32 and GT35 turbos appear like they may have dual scroll
turbine housings, since the drawings I've seen show two openings
in the exhaust inlet flange. With 5 cylinders probably the only option
is to use it like it was a single scroll and feed the two openings with
all of the cylinders combined in the EM or header, just like we normally do.
But then you won't get the some of the claimed advantages of
dual scroll such as a somewhat lowered boost threshold, reduced
reversion through the exhaust valves, etc.

On the variable geometry turbos, a number of OEMs have been using
them for diesels. I've read that it's more challenging to get good
reliability at the higher exhaust temps in gasoline engines, but apparently
there's still a lot of work going on in this area.

Paul


----- Original Message -----
From: Scott Munger <mungerts at yahoo.com>
To: Joseph Pizzimenti <pizzoman at yahoo.com>; <s-car-list at audifans.com>
Sent: Saturday, September 20, 2003 7:31 PM
Subject: Re: [s-cars] RE: K27/K26-6


> Yeah, the GT32 and the GT35 have the specs to match
> the power demands of the 2.2 under high boost.
> Garrett claims the efficiency is significantly better
> than the previous T generation...
> When it comes time to swap turbos, I'm going to
> investigate those. (GT35 may be a lag monster :-\ )
> --Scott
>
> --- Joseph Pizzimenti <pizzoman at yahoo.com> wrote:
> > For that matter, how about a GT35R twin ball bearing
> > unit from Garrett?  From talking to my ricer
> > buddies,
> > this is going to be THE turbo for the 2.5L turbo
> > USDM
> > STi motor.
> >
> > Seems like all that you would need to do is adapt
> > the
> > flange, but that's a machine shop visit away, no?
> >
> > Joe
> >
> > --- Scott Munger <mungerts at yahoo.com> wrote:
> > > Considering the conflicts of high air volumes and
> > > low
> > > lag, has anyone tried an
> > > (http://www.aerocharger.com)variable A/R turbo?
> > >
> > > --Scott
> > >
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