3 bar map sensor possible offset issue

[sarg]

0611d27 is the only thing close to a part number I can find on the map sensor. Currently I have 305 and 10.33 in the tune. But while searching for the exact sensor I have, I came across the site I bought the sensor from and it showed 40 kpa at .39v - 305 at 5.1v How would you calculate the offset from this data?

[sarg]

If it helps key off it is at 95 kpa at 1200 feet above sea level. So I am thinking the offset needs to be adjusted. I would assume it would be closer to 105.

[DSteck]

1200ft above sea level will not see 105kPa barometric pressure.

Post the data sheet you found. Need to know the reference voltage that those numbers are based on.

[sarg]

3-bar-map-sensor-ratings-chart.png

[sarg]

I know on the other cars I have tuned the factory map would see around 14.5 absolute.

[DSteck]

Hmm. It doesn't list what voltages the min and max occur at. I guess you could assume they happen at 0 and 5.1, but I don't know if that's where it's measured from.

[sarg]

I was thinking maybe the .36 and 5.1 volts. 40 and 305. So just doing basic algebra I came up with 299 at 5.0 volts. So I was wondering if I should input that instead of 305 kpa. Offset I am still not sure of. I am thinking I should be in the 14.2-14.4 psi absolute range normally. So it is off just a few kpa at 94.9 kpa. Not sure if it is worth even changing or just rolling with it.

[blownbluez06]

5kPa loss at 1200ft doesn't seem far off. It should be sitting around 96.5kPa at 1200ft. You don't need to calculate. Just adjust until you achieve what you want