At around 5 pounds of boost, my digital gauge only reaches 50 lbs? Isnt that a little low? I have a 12# pulley, but only went up to 5 lbs when I did the test. Can I adjust the fuel pressure by turning that screw adjustment at the FMU?

 

cheap digital fuel gauges are not fast reacting, we learned this the hard way. We bought one for around $100 and pressure never seemed to keep up. So we added a mechanical one and the digitial was always 1-2sec late, not good on a fi car. If you have a cheap digi gauge, I say swap it out

I have a Greddy pressure gauge and it acts within a split second