Paxton fuel control unit

Hello there,
I'm wondering what the function of this unit is. How does it work?
Thanks.
Best regards
Jo

Wich fuel control are refering to ?
FMU, fuel management unit, it controls the fuel pressure under boost, more boost = more fuel pressure.

Auxillary fuelinjector setup with standalone computer, depending on engine 2 - 3 extra fuel injectors, they inject extra fuel while under boost, they mount under the trottle body or in the carbhat depending on engine.