2bar MAP discussion, come on in
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2bar MAP discussion, come on in I have been contemplating this for awhile regarding 2-bar MAP. GM makes compatible 2bar MAP sensors that would fit our cars right? And from what I am reading, the voltage output from low to high seems to be about the same. Is it possible to replace your 1bar MAP with a 2bar, and re-work your stock VE table focusing on the low half of the table. Yeah, you would lose half your resolution, but it would work wouldn't it? (Not for me with my poopie 98 secondary VE table...but still) I just find the concept intriguing.
Yeah i'm pretty sure it'd be possible but it would take a lot of tricking the pcm to pull it off. Since there is an upper limit on the ve values the pcm will accept, you can't just double the ve values, rework the lower half, and have the units still be accurate. You'd end up having to halve the ifr tables and modify your spark tables cause the g/cyl axis would be off, and probably some other stuff too. So yeah, it'd be possible to get the fueling right but it'd probably be a tuning nightmare since you'd be working with stupid units like (2 grams)/cyl instead of grams/cyl.
Thread Starter
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Originally Posted by P Mack
Yeah i'm pretty sure it'd be possible but it would take a lot of tricking the pcm to pull it off. Since there is an upper limit on the ve values the pcm will accept, you can't just double the ve values, rework the lower half, and have the units still be accurate. You'd end up having to halve the ifr tables and modify your spark tables cause the g/cyl axis would be off, and probably some other stuff too. So yeah, it'd be possible to get the fueling right but it'd probably be a tuning nightmare since you'd be working with stupid units like (2 grams)/cyl instead of grams/cyl.
