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-   -   GM 3bar map sensor questions (https://www.homemadeturbo.com/engine-management-10/gm-3bar-map-sensor-questions-41374/)

prelude 06-18-2005 05:19 PM
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

95civic 06-18-2005 06:29 PM
Re: GM 3bar map sensor questions
 
I know you can run it as long as its not pluged into your map

Chris Harris 06-18-2005 09:10 PM
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.

Tom-Guy 06-19-2005 07:49 AM
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?

TurboEF9 06-19-2005 11:36 AM
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.

prelude 06-19-2005 12:49 PM
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

darksol2005 06-19-2005 01:01 PM
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... ::)

Tom-Guy 06-19-2005 08:41 PM
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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