Trust me I have done IT!!! I had an FMU with a Jackson Supercharger on my Y8 FAGGOT!! The FMU just raises fuel pressure, it does nothing to the milliseconds of opening on your injectors. SO wow, you have 60+ psi of fuel pressure for a few milliseconds and the MAP sensor has no clue whats goin on. And now what about timing??Originally Posted by dallasb84
Oh YEAH!! Not a goddamn thing! The factory ECU still keeps the same timing. It may work for a while, but WASTE the money on something that is worth it.