Focus Fanatics - View Single Post - Datalogging AEM Digital Boost Gauge
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Old 11-19-2012, 06:48 PM   #4
mj22
Focus Jr. Enthusiast
 
Join Date: Feb 2006
Fan#: 32067
Location: australia
What I Drive: 2003 silver 2.0. zetec

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Hey All,

Is anyone aware if the analog signal provided by the AEM Digital Boost Gauge provides an absolute pressure. ie. atmospheric pressure plus the pressure created by the supercharger/turbo etc?

If this is correct I am at or around sea level so I have an approximate atmospheric pressure of 14.7 psi.

If this is the case I would need to modify the formula applied to the raw 0-5 volts from the AEM boost gauge to be "[(12.5*v)-6.25]-14.7". Anyhow applying this formula the boost levels I am datalogging appear significantly more accurate.

Can anyone confirm if this correction for atmospheric pressure is required?

Thanks,

Mike
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