Fmu?
 

I give up, what is this thing? :confused: I keep seeing FMU used all over the place, but I was obviously sleeping when they told me what it was. So after you finish laughing at me, please tell me what the heck it is. :p

FMU stands for fuel management unit. It is used on boosted applications such as a supercharger or turbo. It raises fuel pressure based on manifold pressure.

Boost goes up, fuel pressure goes up adding the required extra fuel.

Thanks, I was guessing that's what it was but just wasn't sure. Now I just have to do the research to find out which one I will need. I'm trying to round up all the components for a twin turbo setup, hopefully I'll have it finished by March. Wish me luck, cause as you can see... I'm gonna need it. :D