Re: High Altitude???

[Pcarselle <pcarselle@worldnet.att.net>]

Avi Meron wrote:
> 
> Pablo, you son of a gun............look up Bob's post, he has a good
> detailed answer.....much better than I could do. As for the driving method
> (exhaust or mechanical), there still should be more than enough (exhaust) to
> drive the turbine,
> Avi
> 
> > -----Original Message-----
> > From: Pcarselle [mailto:pcarselle@worldnet.att.net]
> > Sent: Thursday, July 30, 1998 7:51 PM
> > To: Avi Meron
> > Cc: quattro@coimbra.ans.net
> > Subject: Re: High Altitude???
> >
> >
> > Avi Meron wrote:
> > >
> > > 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
> > >
> > > > > ++++++++++++++++++++++++++++++++++++++++++++++
> > > > 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
> > > >
> > Avi:
> > Thanks for input. How can an exhaust driven supercharger (Turbo ?)
> > compensate ?
> > Where am I wrong ? Please help me !
> > I thought less volume of air at intake resulted in less exhaust volume.
> > Therefore less CFM's to drive superchargers.
> > Is it then that a Turbo at sea level and at 12000 ft. provide the same
> > boost ? by compensating ?
> > Mechanically driven turbochargers are of course self explanatory.
> > Your help will be appreciated
> > Thanks in advance
> > Pablo
> > P.s. I measured (long time ago ) internal combustion engine vacuum at
> > 12000 ft.  and it was about 2 inches of mercury less than at sea level.
> > Engines seem to breathe less.
> > Compression drops substantially, Power  and Torque follow.
> > I am getting old
> > Pablo
> >
Avi:
Ok. Thanks . I read already. Good explanation of Turbo control.
Regards.
Pablo