540 w/ 1471 and intercooler and not running a fuel regulator. I have 11-12 lbs pressure at idle and it goes down to 6 when im at speed. loads up when idling a lot. I see all the regulators after the carbs on return line. i assume this pressurizes the system and keeps flow even. my questiuon is is this correct and do i need same size return line as input if I put a reg. in after carbs? currently I have a smaller return line.
I know only 6-9 lbs is what I'm supossed to have but boat has always ran good w/out one. I also have my mechanical pump in line w/ holly elect. w/one way valve in it. any help appreciated