I am trying to add a vacuum gauge (in-Hg) in the my adx, Im not too sure on the formula, could some help me out please?
I am using a MPX5700AP pressure sensor. Ive got a boost and MAP gauge working fine.
Boost gauge (PSI) formula ((((X/255) - 0.04)/0.0012858)*0.145) - 14.530
MAP gauge formula (((X/255) - 0.04)/0.0012858)
I think its (((((X/255) - 0.04)/0.0012858)*0.145) - 14.530)*-2.036025
Is that correct?
thanks
Vacuum Gauge in tuner pro
Moderators: Mangus, robertisaar, dex
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I have been trying to figure out the same thing. My answer from another website and user VL400:
You can link directly to other items when configuring the ADX which makes the equations simpler and its worth using the baro item to get a true vacuum reading. Baro (or barometric pressure) is the MAP sensor reading at key on and engine off, its also updated during running under certain conditions.
Add a new item and the equation can be (X - Y) * 0.2952999 to display inches of mercury
X = linked to Baro
Y = linked to MAP
kPa to inHg is 0.2952999.
You can link directly to other items when configuring the ADX which makes the equations simpler and its worth using the baro item to get a true vacuum reading. Baro (or barometric pressure) is the MAP sensor reading at key on and engine off, its also updated during running under certain conditions.
Add a new item and the equation can be (X - Y) * 0.2952999 to display inches of mercury
X = linked to Baro
Y = linked to MAP
kPa to inHg is 0.2952999.