RE: High Altitude???

["Avi Meron" <avi@cosmoslink.net>]

Pablo,
Any supercharger regardless of the method driven (exhaust or mechanical)can
compensate for altitude (that is why they are used in aircraft's)...
Avi

> -----Original Message-----
> From: owner-quattro@coimbra.ans.net
> [mailto:owner-quattro@coimbra.ans.net]On Behalf Of Pcarselle
> Sent: Thursday, July 30, 1998 1:29 PM
> To: Powells@ezlink.com
> Cc: quattro@coimbra.ans.net
> Subject: Re: High Altitude???
>
>
> Powells@ezlink.com wrote:
> >
> > Friends, since I arrived in Fort Collins, CO (just north of denver) I
> > have noticed that the boost in our 1990 200 rarely goes above an
> > indicated 1.1 bar.  On occasion I can get the normal 1.3 to 1.4 bar,
> > but not dependably.
> >
> > I found that gas up here is 91/87/85 (premium/plus/regular) octane,
> > as opposed to the 93/98/87 which I found in Texas.  I also found
> > that my wife had been filling up at a Sinclair station.  I wondered if
> > the Sinclair gas's octane might be too low, causing the engine to
> > knock and timing to be retarded, causing in turn a lack of boost...
> >
> > I tried filling up on premium at a Texaco station (posted as the
> > same octane, 91) and the situation has not improved.
> >
> > Any thoughts on the possible cause?  I can certainly check timing,
> > etc., but thought I would ask for group wisdon.
> >
> > PS:  YES, I have thoroughly checked the intercooler hose, and it
> > has no cracks or failures in the area where the oil collects.  BTDT
> > already a few months ago.
> >
> > TIA for any (constructive) thoughts).  Also FYI - my Audi page and
> > Audi FAQ pages should re-appear within a week.
> > ++++++++++++++++++++WSU-CSU+++++++++++++++++
> > Al Powell
> > Powells@EZlink.com
> > 1958 Fiat 1200 Spyder "Transformabile"
> > 1983 Datsun 280ZXT
> > 1990 Audi 200
> > ++++++++++++++++++++++++++++++++++++++++++++++
> Powell:
> In my opinion you have decreased atmospheric pressure. Less intake
> volume therefore less exhaust volume. Superchargers not exhaust driven
> can compensate. ECU compensation can address timing and in some systems
> spray duration but not air (molecules) volume.
> HTH.
> Pablo
>