GM 1bar MAP will it see any boost?

[Bruce Plecan]

-----Original Message-----
From: Steve Lamb <lambs at HOTBLK.dsto.defence.gov.au>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Tuesday, November 17, 1998 9:28 PM
Subject: Re: GM 1bar MAP will it see any boost?

If you mean to do any meaningful calibrations at several PSI of
boost then you should be running a 2 bar MAP sensor (which
will work up to 14.7 PSI of boost).  More than 14.7 or so then
a 3 bar that takes ya up to 29.4.  IMHO it's better to have too much
sensor so you can turn off the timing incase a waste gate or something fails
and you go over boost.  Trying to run 5 PSI of
boost on a 1 bar MAP is done all the time, but ain't the way to fly in my
book.
  The PSI are approxs., there is as mentioned some variance PSI
boost to MAP.
 Bruce



>>MAP is Manifold ABSOLUTE Pressure.  Not Guage pressure.  A 1 bar MAP
>>sensor will not go significantly above atmospheric (a few % maybe
>>depending on how it is built).
>
>That's what I thought, Orin.  I found the original reply a little
>confusing, but perhaps it's just my problem with the terminology    :-)
>
>
>Steve Lamb
>Department of Defence, DSTO
>Aeronautical and Maritime Research Laboratory
>506 Lorimer Street
>Fishermans Bend  VIC 3207 Australia
>
>Tel: +61 3 9626 7525
>Fax: +61 3 9626 7089
>
>IZCC #180
>
>