Am I running too big or too many nozzels?

Just installed a Devil's Own kit with 3 nozzels installed: 14, 10, and 5. I have it come on about 18 PSI and full on at 30 ish. Just installed the kit and the calculator on Devil's Own web site said I needed about 35 GPH thats why I chose these three. Also it makes a sounds like air or ripping paper when the kit is pumping.

pm Chance at devil's own. they are a sponsor now