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Old 11-17-2012, 05:20 AM   #1
Focus Jr. Enthusiast
Join Date: Feb 2006
Fan#: 32067
Location: australia
What I Drive: 2003 silver 2.0. zetec

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Datalogging AEM Digital Boost Gauge

Hi Guys,

I was just wondering if anyone has had any success datalogging the analog output from an AEM Digital Boost Gauge (30-4406).

I have wired up my Xcal 3 to datalog the analog output, 0-5 volts that the gauge supplies and attempted to apply this equation to the raw voltage signal:

*Equation*: PSIA=12.5*(volts)-6.25* scale: .5v-4.5v = 0-50psia

which should then provide the boost.

I'm running a JRSC which sees 10 psi at redline. The boost level is indicated on the gauge however applying the formula to the analog output I don't get an accurate boost figure to datalog.

Can anyone advice an amendment to make to the above formula or possible reason the analog output may not be providing an accurate signal for datalog?

Thanks for the help.


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