map sensor question
05-10-2010, 02:17 AM
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These 2 and 3 bar MAP (manifold air pressure) sensors measure air pressure up to 14.8 psig (2 bar) and 29.7 psig (3 bar). im posting an answer to my own question .thats sad!
05-13-2010, 07:39 PM
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a 2 bar reads 1 bar vacuum and 1 bar boost=14.7 PSI
a 3 bar reads 1 bar vacuum and 2 bars boost 29.4 PSI.
Cobalt sensor is a 2.5 bar. 22.5 PSI.
Cars with 2 bar's are the GTP's, Buick GN's, and Syclones.
Only car ever made with a 3 bar is the 1989 Turbo Trans Am. And it was used just for the in dash boost gauge.
The lower the bar, the higher the resolution.
05-13-2010, 08:35 PM
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Factory is a 1 bar designed only to read vacuum.
a 2 bar reads 1 bar vacuum and 1 bar boost=14.7 PSI
a 3 bar reads 1 bar vacuum and 2 bars boost 29.4 PSI.
Cobalt sensor is a 2.5 bar. 22.5 PSI.
Cars with 2 bar's are the GTP's, Buick GN's, and Syclones.
Only car ever made with a 3 bar is the 1989 Turbo Trans Am. And it was used just for the in dash boost gauge.
The lower the bar, the higher the resolution.
a 2 bar reads 1 bar vacuum and 1 bar boost=14.7 PSI
a 3 bar reads 1 bar vacuum and 2 bars boost 29.4 PSI.
Cobalt sensor is a 2.5 bar. 22.5 PSI.
Cars with 2 bar's are the GTP's, Buick GN's, and Syclones.
Only car ever made with a 3 bar is the 1989 Turbo Trans Am. And it was used just for the in dash boost gauge.
The lower the bar, the higher the resolution.
i think the only one that used a 2.5 bar was the cobalt with the blower, not a turbo
Last edited by elias_799; 05-13-2010 at 08:45 PM.
