https://docs.emtronaustralia.com.au/engine-management/tuning/fuel/fuel-tuning/index.htmlFuel Tuning Overview The fueling calculations used by Emtron are based on an Air Mass per cycle which is then converted to a Fuel Mass based on the requested lambda target. This is true whether the system is using directly measuring airflow from the air mass meter, or calculated air mass from the Ideal Gas Law based on Engine Displacement, Engine Manifold Pressure, Charge Temperature, and Volumetric Efficiency.Hugoen-us