2 Bar Map Sensor Vs 3 Bar

749 861 the logic module uses the manifold absolute pressure map sensor to determine the absolute pressure not the relative to atmospheric pressure of the air inside the intake manifold and the atmosphere barometric pressure.

2 bar map sensor vs 3 bar.

I ran the 2 bar map sensor with my old commander c950 without any issues but it did not change the kpa scale. I currently have a 2 bar map sensor but have a naturally aspirated race engine that would normally require a 1 bar map sensor. The sensor will measure each direction vacuum or pressure. Formula for the gm 3 bar map sensor is v 8 94 14 53 i have no idea why it s 14 53 and not 14 696 rounds up to 14 7 but it works out on gm s chart every time.

It is possible that detroit is slightly above sea level and you can use 12 11 in the formula for 1 mile above sea level. If a person were to put a 1 bar sensor where a 3 bar goes the ecu would malfunction when the boost arrives and wouldn t know what to do with the air fuel ratio because the numbers on the fuel maps don t add up. 039 460 883 876 153 2 bar. 886 012 539 609 701 3 bar.

3 digit numbers for identification. 3 and 3 3 bar sensors are perfect for this because of their simple 3 wire connector reliability and accuracy. Whereas the 2 bar sensor on the right has only one additional line. Conversely if the sensor has two lines its a 2 bar sensor.

The same principles can be used to convert to a 3 bar os as well. Notice that they both have the same part number on the first line but the 3 bar sensor on the left has two additional lines of numbers. Can i run the 2 bar map sensor but tell the efi software that it has a 1 bar so that the kpa scale stays smaller. 1 bar is for a normally aspirated engine 2 bar will handle a forced induction up to 14 5 psi of boost 3 bar will handle a forced induction up to 29 0 psi of boost 4 bar will handle a forced induction up to 43 5 psi of boost.