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Date: Sat, 25 Mar 1995 13:07:38 -0500 (EST)
From: "Graydon D. Stuckey" <graydon@apollo.gmi.edu>
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To: Arun Rao <rao@frisbee.gmi.edu>
Cc: quattro@coimbra.ans.net
Subject: Boost gauges, 5KCSTQ
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On Fri, 24 Mar 1995, Arun Rao wrote:
> > gauge actually elctronically measures manifold pressure, not true boost
> > pressure. .... [ stuff deleted ]
> >
> >-- End of excerpt from Steve Marinello
>
> OK, I'll bite ... what's the difference? Naively, it would
> seem that boost pressure would just be the difference between
> atmospheric pressure and manifold pressure: if my gauge says
> 1.4, the boost pressure is 0.4. In any case, isn't it the
> manifold pressure that counts?
>
> -Arun
Arun,
I installed an Autometer boost gauge, and found that the stock
digital gauge in the centre console is fairly accurate but it lags
behind actual boost pressure by a few tenths of a second. Also,
since it measures in tenths of a bar, the resolution is fairly
coarse. The Autometer boost gauge measures psi, and
realistically, I can read it to within a 1/2 psi. Compared to
roughly 1.5psi per .1 bar, there is quite a difference in
resolution. I like the Autometer boost gauge alot better.
Later,
Graydon D. Stuckey
'86 Audi 5000 CS Turbo Quattro '83 Mazda RX7, SCCA Solo II F-Prepared
'83 Mazda RX7, street car '85 Mazda RX7, street car
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