I'm new to the whole FI setup, i bought a used JRSC for my JDM ITR and it didnt come with the FMU, do need it for the JRSC to run. I also got another question, i have a AEM adjustable Fuel pressure regulator with the AEM Fuel rail and a B&M fuel pressure gauge, is this the same as the FMU? help, i'm lost about FI.

 

Im not going to flame you about how you should have researched the setup before buying it, and potentially blowing ur engine...

A FMU adds pressure in a ratio for whatever its designed for. ie 10:1, 12:1 etc...
The fuel pressure regulator does what its name implies.

Forget about the FMU, and you can keep the fpr, and get some bigger injectors (depending on how much psi you going to run) and a walbro pump.

Put it on the dyno and let your tuner figure out how much fuel it needs rather than an FMU.

 

the questions is, can i still install the jackson racing supercharger and run with out the FMU until i can get my hands on a walbro 255lhp fuel pump and 440cc injectors and drive it to the tuner?

 

I wouldn't drive it. the FMU adds 5 psi of fuel for every psi of boost. you won't have enough fuel going to the engine without a tune/fmu.

you can install it if you want, but drive it without the belt on until you can get it to a tuner.

 

what do you mean when you said that I can drive it without the belt on?