These are the voltage readings a properly function MAP sensor should show.

Boost - Voltage
0 - 1.045
6 - 1.48
10 - 1.75
15 - 2.05
18 - 2.27
20.5 - 2.44

 

what if u go over 40 psi.....? 4.88 v?

 

Sounds Rational to me

 

i would assume 3.82 since that's the pattern that i'm finding..... remember that you can't double the 20psi voltage as you started off at 0psi at 1.045v.... what i did was subtract the 10psi voltage from the 20psi voltage and that number range is good for approx. a 10 psi difference. so double that and add it to the 20 psi and you get the 3.82ish and that "should" be 40psi or so.....

 

I have the data somewhere. The factory MAP will measure all the way up to close to 60PSI.

Dave