The ECU needs an input of engine load. The Omex ECU can use an input of throttle
position or manifold absolute pressure (MAP). Most normally aspirated engines will
use an input of throttle position as this gives excellent throttle response. Forced
induction engines need to use MAP as there is no direct relationship between throttle
angle and engine load due to the variable of boost pressure. However, forced induction
still requires throttle position sensor (TPS) input for idle condition and acceleration
fuelling information. It is possible to also use TPS as the main load sensor with
a boost compensation from the MAP sensor. The rating of MAP sensors is absolute,
not boost pressure. Therefore a 2bar sensor is for up to 1bar boost and a 3bar for
up to 2bar boost.