[s-cars] water injection, before turbo?

[Trevor Frank]

So from what I understand this is pretty common on rally cars, in the
early days. 

Issues, from what I read you will get erosion of the blades, pitting,
eventually.

If you have and intercooler it is possible to condense the water in it.

You are adding water so that is helping clean the combustion chamber and
increase detonation protection.

Here is my question, if you don't get it to cool again it may not
decrease intake temps much?

-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com] On Behalf Of kirbyasmith
Sent: Saturday, October 23, 2004 10:15 PM
To: Joe Pizzimenti
Cc: s-car-list at audifans.com
Subject: Re: [s-cars] water injection

While injecting after the intercooler is clearly the most thermally
efficient approach, and before the turbo not recommended, there is some
question in my mind of just what damage occurs with upstream water
injection, assuming it is a fine spray.  Turbo Corvairs were of sucker
architecture, and at full boost (about 10 psi into 2.7 liters), the
Carter YH sidedraft carburator was certainly streaming gasoline that
hadn't yet vaporized right onto the compressor blades.

I never saw any sign of erosion on the blades of the OEM (TRW) turbo
compressor (reportedly good to 80 krpm) after 120 kmiles and 300 laps
around Briar raceway, nor heard of erosion on the later available
aftermarket compressor (good to 120 krpm).  This, of course, doesn't
prove upstream water injection wouldn't be bad for a K24/K26/etc.
Anyone know of any facts supporting the contention that upstream water
injection damages compressors?

kirby


Joe Pizzimenti wrote:
>
> That would be the best way to do it.  Mine's in the intercooler end
> tank right before the outlet hose.
>
> On Fri, 22 Oct 2004 18:26:52 -0700 (PDT), Theodore Chen
> <tedebearp at yahoo.com> wrote:
> > yeah, i wondered about that, but that was a suggestion from somebody
> > on another list.
> >
> > how is it installed in the hose?  did you splice in a piece of pipe
> > and install the fitting in it?
> >
> > -teddy
> >
> > --- Mark Strangways <Strangconst at rogers.com> wrote:
> >
> > > WOW...
> > > Do Not put it before the turbo
> > > The water can damage the compressor.
> > >
> > > Mine is in the hose between the intercooler and the throttle body.
> > >
> > > Mark //S
> > > ----- Original Message -----
> > > From: "Theodore Chen" <tedebearp at yahoo.com>
> > > To: <s-car-list at audifans.com>
> > > Sent: Friday, October 22, 2004 8:22 PM
> > > Subject: [s-cars] water injection
> > >
> > >
> > > > where do you install the injector?  upstream or downstream of
the turbo?
> > > > seems like if you put it downstream of the turbo, it has to be
able to
> > > hold
> > > > up to 30 psi of boost.  there's not too many convenient places
to install
> > > > the injector in that case.
> > > >
> > > > -teddy
> > > >
> > > >
> > > >
> > > >
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