08 Dragon Alitude Compensator ???

[Stonehands]

Does anyone know how they work?

 

[ElectroTech]

Sensor in airbox known as a TBAP (temperature,barometric and atmospheric pressure), ECU uses the signal 1-5v and adjusts accordingly, also its apparent it's not as linear on opperation as it should be being that there is a known point where the whole curve shifts significantly once it gets a little warm.