[84gt347]

(lincoln mk7 has the kenne bell) i don't use an fmu on this car, i have 42# injectors and a 255 pump and the kb chip, but , 12 psi of fuel pressure per lb of boost with 5 lbs of boost is 60 lbs increase. With no vacuum to the fpr, the factory reg should give you about 36 or 37 lbs of fuel pressure, so add 60 to that and 96 or 97 lbs is what i get. I have an fmu on my vert with a vortech and 42 lb injectors. I also have an adjustable fpr. I set the fpr at 40 lbs with no vacuum, and under full boost (15lbs) I see total 75lbs of fuel pressure. I would think if it takes 100lbs of fuel pressure to run the set up , Your injectors are too small. What size are they? I think the system would be more efficient at a lower fuel pressure than 100. Maby in the 75 range. Not too sure on that though. Maby 100 is fine.