Originally posted by evotunedscc
Ok. I hate to make you beat a dead horse here, but given what I have: walbro 255lph fuel pump, holley 12:1 fmu, and a set of 450cc injectors. What else, as far as the fuel system, do I need to buy to safely run 20lbs of boost. Like I know I need megasquirt, but what other accessories with it? Will I need a FCD?

you need to ditch your fmu for a 1:1 fpr. you also need to buy an IAT sensor and coolant temp sensor. FCD is not needed b/c the ecu cannot cut fuel once the MS is installed.