gm map sensor

[Richard Wakeling]

Hi Steve,
    We needed to check the calibration on our datalogger with regards boost
pressure and so set up a jig and pressurized the 2 bar and 3 bar sensors in turn.
Plotting points were made and from there a formula was found. I don't know how
these results compare with GM but we were quite happy with them and wondered how
others could compare with our findings.
    As an example a map voltage seen by the ECM/PCM of 2.49 Volts  (dec 127)

C    =   57.81 kPa  for a 1 bar sensor

D    =  110.6  kPa  for a 2 bar sensor

E    =  160.4  kPa   for a 3 bar sensor

F    =  1.53 lbs  for a 2 bar sensor

G    =  8.76 lbs  for a 3 bar sensor
Hope this helps

Cheers Richard.

steve ravet wrote:

> I can't quite make out what's in that spreadsheet.  It's calculated
> data, not measured?  What do the formulas (and results) for Volts, 1BAR,
> 2BAR, etc. mean?
>
> Richard Wakeling wrote:
> >
> > Hi Walter, Jeff
> >
> >     Did you have a look at  http://www.cse.unsw.edu.au/~akwa622/gmecm
> > My son Andrew and I spent some time with it. Let us know what you think with
> > regards its accuracy.
> >
> > Cheers Richard.
> >
>
> --
> Steve Ravet
> steve.ravet at arm.com
> ARM,Inc.
> www.arm.com
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