Water Methanol AFR Calculation

[Flr Power]

Ok, thanks, I had some numbers wrong in there.
So the right numbers are: I inject 12.5% meth x 0.44=5.5% more gas or around 0.5 AFR change.

I was close but not enough it seems since now it looks like I have to only trim 5.5% gasoline from my main fuel map at full load/boost.

[Liborek]

Originally Posted by Flr Power

I was close but not enough it seems since now it looks like I have to only trim 5.5% gasoline from my main fuel map at full load/boost.

Charge cooling effect can increase air mass trapped in cylinder which would partially compensate for increased fuel value. It depends on accuracy of determining actual airflow into the engine.