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GM 3bar map sensor questions

Old 06-18-2005, 05:19 PM
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Default GM 3bar map sensor questions

So i got a gm 3bar for free at work and i was wanting to know if i could put it on before i boost, has anyone run it while NA? also someone explain to me what this does for you. what are the advantages of it? and does it have to be out of a specific vehicle/engine, i pulled mine from a chevy 350.

thanks
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Old 06-18-2005, 06:29 PM
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Default Re: GM 3bar map sensor questions

I know you can run it as long as its not pluged into your map
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Old 06-18-2005, 09:10 PM
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Default Re: GM 3bar map sensor questions

Originally Posted by prelude
So i got a gm 3bar for free at work and i was wanting to know if i could put it on before i boost, has anyone run it while NA? also someone explain to me what this does for you. what are the advantages of it? and does it have to be out of a specific vehicle/engine, i pulled mine from a chevy 350.

thanks
It allows you to boost higher than 10.5 psi and still let your ECU know it.

Basically, it allows you to boost higher than the stock honda MAP will read.
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Old 06-19-2005, 07:49 AM
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Default Re: GM 3bar map sensor questions

You don't get GM 3 bars off of Chevy 350's. They only came on one very very rare 1989 Pontiac. You sure you have a GM 3 bar?
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Old 06-19-2005, 11:36 AM
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Default Re: GM 3bar map sensor questions

Originally Posted by prelude
...has anyone run it while NA?...
You can't do that without rescaling your entire fuel and ignition map for different resolution. The MAP voltage points are very different. In fact, you'll run WAAAAAAY lean going from a 1bar to a 3bar.. yes, even NA.
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Old 06-19-2005, 12:49 PM
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Default Re: GM 3bar map sensor questions

Originally Posted by Joseph Davis
You don't get GM 3 bars off of Chevy 350's. They only came on one very very rare 1989 Pontiac. You sure you have a GM 3 bar?
im thinking your wrong because it definately is a 3bar map sensor. i even compared it to one on a buddies turbo si and its the same damn thing.
i could be wrong but im pretty damn sure
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Old 06-19-2005, 01:01 PM
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Default Re: GM 3bar map sensor questions

i doubt it. look at the part numbers. most of them look the same anyways. the map sensor on my old sunfire looks like a 3 bar...
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Old 06-19-2005, 08:41 PM
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Default Re: GM 3bar map sensor questions

Generic housing - what is inside is what counts.

If OEM, I believe the 3 bar has a pink dot of paint, the 2 bar MAP gets a greem spot, and the regular 1 bar gets a white spot. I could very well have the color codes all wrong, I have been drinking that Tussin DM like it's going out of style.
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