https://docs.emtronaustralia.com.au/engine-management/config/air-mass/speed-density-map/index.htmlThe ECUs primary Fuel Model is Speed Density(MAP Sensor). The basis of this calculation is derived using the Ideal Gas Law; PV = nRT. The ECU calculates the injection time for speed density using the following information: Displacement volume per cylinder (cc). Intake Manifold Air Pressure - MAP(kPa) Lambda Target (La) Stoichiometric Ratio of the Fuel (Stoich) Injector Flow rate (cc/min) Charge Temperature (DegC) Fuel Density (g/ml) Fuel Pressure (kPa) Engine VE (%) Gas Constant - R = 287J/Kg/K for Dry Air. Example: MAP = 252kPa Charge Temperature = 30.7 DegC Volume Per Cylinder = 666.6 Stoich Ratio = 9.9 Lambda Target = 0.785 Engine VE = 96.6 % Fuel Mass (g) = 0.2395Hugoen-us