I have a Manifold Pressure gauge already on my realdash app. it’s setup so 100kpa is athmospheric. so at idle i’m at 30kpa and 14.7psi is 200kpa
i also have a boost gauge for which i use calculated values/PSI under input source.
the gauge always reads around 15 and doesn’t climb or drop into - when my Map gauge reads vacuum.
What am i missing?
Check if the range setting is limiting the boost gauge values. Note that boost gauge will show 0 at atmospheric and negative under vacuum. If gauge range min is set to 0, it never shows the negative values.
Min and Max on the boost gauge is -14.504/30
Min and Max on the Manifold Absolute Pressure gauge is 0 and 400
I ran a test tonight. When I put the dash in simulation mode the boost gauge acts as it should
-14 at 0kpa
0 at 100kpa
14 at 200kpa
and so on
but when i plug it into the car the boost gauge reads -14.3 at 101kpa with the engine off
it’s as if the boost gauge suddenly uses gauge pressure instead of absolute. not sure what else I can check
Ok, I will run some tests too.
I changed the min value to -50 just to see and discovered that the gauge reads 30psi off
so at 100kpa it reads -30
seems like the math is wrong for me anyway. See if you can confirm. i played with gauge math but had no effect i assume because gauge math only works on source values