Help to undestand boost maps edc17c64

[psim93]

Hello, i need help to undestand boost maps in this ecu, the boost maps called combustion chamber charge are in mg of air, the boost limiter are in hpa like old edc17c46.. how should these maps be changed?

[jurebv]

combustion chamber charge maps are boost request maps request maps like normal just values are in mg of air instead of mbars, it is basically MAF in mg of air, MAF = cylinder ccm * boost bars * air density * engine efficiency

air density varies with temperature, humidity and altitude
engine efficiency varies with rpm

[psim93]

If i want calculate the mg value of a specified boost pressure?
Example: i want a boost of 2900mbar how i calculate the corrisponding maf value?

[jurebv]

example 492ccm * 2.9bar * 0.9 efficiency * 1.1 kg/m³ air density = 1412 mg of mass air flow (MAF)

as mentioned before air density varies with temperature, humidity and altitude
engine efficiency varies with rpm