Like the title says Where do 4 bar maps come from, I know they are GM but what car o does any one have a part number and what about 5 bar?

 

Motorola. All of the aftermarket MAP sensors that I know of are based on the Motorola MAP sensors. I'm running a Motorola 4 bar in an OEM casing.

 

Motorola is what is used in the Omni/Hondata sensors, and Delphi is the main supplier for the GM 1/2/3 bar sensors IIRC. There are more than a few actual producers of them, which is why some people complain about changes in their tune when they have to exchange their GM sensor with another.

The AEM 5bar I'm not sure of, but given the body's shape, I'd assume it's a Honeywell-produced sensor. If you need more than 44psi of pressure, you should already know all this... Most people won't use more than 20psi (pump gas) or 30psi (most turbos' upper limit).

 

I can't remember exactly...BUT, I believe any year Grand National, Typhoon, or any older boosted GM product. I got mine from Oriellys in town. Ordered it for a GNational.

 

thanks thats wut i wanted to know

 

gm 3 bars kinda suck imo. they dont read as much vacuum and idles not that great on them from my experience. i prefer a motorolla or hondata or omni. nothign better than stock location either

 

The AEM sensors are produced by SSI. AEM rebadges them just like they do with the boost control solenoids.

 

Yup, the GM stuff SUCKS... Motorola runs muuuuch better

 

If u want to buy one a good place to get them for a decent price is www.xenocron.com

Here is a direct link
http://www.xenocron.com/electronics-...ef58c8b3d39252