edit: This thread is now super seeded by the speed density tuning guide found in the link below. However if you would like to understand the full mathematical model behind the calculation then continue reading this thread.   Speed Density is the name of the air flow model that the Falcon platform uses. Speed density works by calculating the airmass at any given point in time, the PCM can then easily infer how much fuel is required for a given commanded lambda. Now to calculate th