I have read in other post about the attitude monitor being way off on the boost gauge. So I called edge, and they told me it reads directly from the mapp sensor. Not from the computer, and not the fooled boost. So I finally got my isspro 60psi boost gauge hooked up and so far the two readings are the same. I`ve watch it up to 38psi. Maybe the mapp sensor is not working correctly if the readings are way off from each other. Also even when in stock setting(0) the boost goes up to 35psi and holds steady as long as your heavy on the throttle. I think the stock trucks drop down to 25(is that right?) Thought this might be helpful. Kevin.

 

Stock max boost for me was 30 PSI. With a programmer it'll go to 37.
Mike
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stock I'll hit 35#, then it will bleed off to about 30# when the waste gate opens if I keep my foot in it.

I checked my Westach pressure gage against my pneumatic pressure standard here at work. the gage was less than .5 pounds off.