Manifold Absolute Pressure (MAP) PID

[azgolfrat]

Hey Guys,
There is a locked sticky thread in the DIY forum called "Know Your Blower" (lots of comedic material there).
It's a good write up that refers to a PID named MAP (manifold absolute pressure).
From hunting around I'm thinking the data for MAP is derived from the MAF sensor.
Does this sound correct?
If so, I'm interested in logging MAP as a boost value, as opposed to the non digital boost gauge I've installed.
Has anyone logged MAP?
FYI, the MAF sensor I have in place is from ADTR's Vortech V7 kit...
Thanks
-KK

[blazen71]

MAP data is taken from the MAP sensor. The sensor is located on the EGR valve. The OEM MAP sensor will only read vacuum if you log it. Since our cars came from the factory without forced induction there was no need to have a MAP sensor that reads vacuum and pressure. The way you would be able to log boost is by getting an electronic boost gauge. The gauge will come with it's own 1 or 2 Bar MAP sensor. You need to install a Firewire on the actual gauge and plug it into your SCT tuner while logging. Your log configuration will need to be updated to include the additional analog input.

[azgolfrat]

Blazen,
Excellent info...thanks

[Blown3.8]

In the T bird world we have wired in an aftermarket MAP sensor to the EGR wiring to log boost thru the EEC. I think this would require you to delete the the EGR function in the tune so would not be emissions compliant.

[blazen71]

In the T bird world we have wired in an aftermarket MAP sensor to the EGR wiring to log boost thru the EEC. I think this would require you to delete the the EGR function in the tune so would not be emissions compliant.

Never thought about doing it that way. Very cool!