GM 1bar MAP will it see any boost?

[Jim Sloan]

> > >>Will a one bar Map sensor go beyond atmosferic level?
> > >
> > >Yes
> > >
> > >>How much?
> > >
> > >14.7PSI (1 bar)
>
> > OK......but does this mean that the ecm still sees sensible signals ??
>
> > What your saying seems to suggest that I _don't_ need to buy a 2 bar
> > sensor.......which is important because I'm in the market for
> one right now
> > !!
>
> 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).

1 bar = 100 kilopascals = 14.5038312 psi = 29.5314958 in Hg

Absolute pressure includes air pressure. If the barometric pressure is 29 in
Hg, then the 1 bar MAP would read .5314958 inches Hg above atmospheric. I'm
not sure the sensors are that accurate however.