How does an FMU work???

Coolbreeze · 06-26-2002, 11:13 PM

Do you have to use an FMU with a blower?? I am new to the supercharger world and trying to get as much info before I install it. I have one with the blower I got but its calibrated for 19# injectors, and I have 30's..What is the purpose of an FMU?? I know it has to do with fuel but exactly what does it do??

MiracleMax · 06-27-2002, 12:08 AM

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.

06-26-2002, 11:13 PM	#1
Coolbreeze Registered Member Join Date: Oct 2000 Location: ~Columbus~GA~31909~ Posts: 156	How does an FMU work??? Do you have to use an FMU with a blower?? I am new to the supercharger world and trying to get as much info before I install it. I have one with the blower I got but its calibrated for 19# injectors, and I have 30's..What is the purpose of an FMU?? I know it has to do with fuel but exactly what does it do?? __________________ Mike Blown~AOD'ed~331~ T-top~ 86GT Check out car on my page here ------ > ~~My 86GT T-top ~~

06-27-2002, 12:08 AM	#2
MiracleMax Registered Member Join Date: Apr 1999 Location: Hayes, Va, USA Posts: 798	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

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