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3 bar MAP sensor

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starscreem

15+ Year Contributor
128
0
May 2, 2005
hoffman estates, Illinois
hey guys i have a 91 lumina i just sent to the junk yard and i yanked the map sensor off of and like a foot of the wire and plug. my question is does any one no what bar this sensor is i cant seem to find the part number for it. if any one can please let me no i would be so happy thanks every one. oh ya its off the 3.1 motor to if that matters
 
Would a lumina even use a 3 bar GM sensor? I would think it would be a smaller one like maybe 1bar or even lower.
 
Yep I've only found a turbo T/A and the first year for grand nationals (86 IIRC). I seriously doubt you'll find one at a u-pull-it yard but good luck.
 
Yep I've only found a turbo T/A and the first year for grand nationals (86 IIRC). I seriously doubt you'll find one at a u-pull-it yard but good luck.
If you do, you might want to grab the whole car. :sneaky:

Thomas Dorris
ECMTuning, Inc.
 
For most WOT tuning it isn't a big deal. It is also going to depend somewhat on your tuning system. I'm not very familiar with link but in an evo or something like that you can generally tell approximately where you are in your boost curve by your load so that at least you'll have an idea of when you are spoolup or when you are fully boosting.

My general rule of thumb is to point for 12.5:1 AFR during spoolup up to about 8-10psi and then drop quickly to a richer setting like 11.1.:1 AFR for the rest of the pull, it can be hard to find where that point is without a MAP sensor but it also is just a reference point that could be moved around if you wanted to or you can base your desired AFR on RPM and ignore bost completely.

It is hard to quanitfy how useful it is for tuning but the simplest answer is that it is nice but not really $50+ nice. I use it because I run SD since dialing in a 2g MAF on an evo8 ecu is a bit of a pain and I got it into my head that SD would be really cool. Besides being necessary for my car its biggest use for me is helping me to dial in gear-dependent ecu controlled boost, without a MAP sensor I wouldn't have even bothered trying because eyeballing a gauge that shoots all over the place in a single run just isn't going to be anywhere near as accurate as comparing it all in a log on your couch.
 
If you get a map sensor you can make sure your maf is perfectly calibrated. Plus you can get good data like spool times. Also SD has been released for ecmlink so could always upgrade.
 
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