FMU's are a quick and dirty fix for supplying extra fuel to the system via a reference to boost pressure to raise fuel pressure in porportion.
As for not using an FMU. At least in a mass air car, the injectors and the mass air need to be sized correctly so that you don't exceed the 4.99 volt window trying to feed fuel to the engine.
__________________
2002 5M GT (99% stock)
1991 5M LX (30% stock)
patiently awaiting my satin silver 07 Mach 1, and don't forget the shaker
|