I've spent an hour or so searching and can't find an answer. Can you use the map sensor from the autometer electric boost gauge in place of the jdm? A couple things I thought I read but can't find anymore, the old autometer map sensor is actually a gm unit (the most info i could find on mine is a sticker that says 2511-736 30/30 boost/vac). The other was taping the signal wire and hooking it to an unused pin on the ecu but I don't know if it was for the autometer or not. If the Autometer sensor isn't a gm then is it accurate enough to use for tuning?

 

the autometer sensor is a gm. and there is a way but i cant remember exactly how

 

this is the formula for evoscan
0.17573*x-14.5

You then need to apply a correction for your altitude to give a baseline of 0psi

Eg: my actual formula in Evoscan reading request 38:

17573*x - 14.058

 

awesome now that I know its a gm unit it makes searching easier. This is what I found for wiring to the ecu.

For evo 9's

 

After a bit of time on the wiki -

for evo 8's
Pin 73 for input
pin 81 for +5v reference