Swap that POS Blue pump for a Walbro GSL-392, Way Quite and will out perform what you have easily. The Walbro is good for about 600HP and you can barely hear it running.
$100.00 Problem solved.
what regulator did you use for a carb application to go from 60 psi down to 5 psi. i imagine this has to be a return line system too. Or did you dead head it.