Ok my fuel pumps are way to friggin loud so its time to change the setup. I have 2 Walburo 255 high pressure pumps in my surge tank being fed by 1 walburo 255 high pressure. The one that is making all the racket is the feeder pump. I know this needs to be a low pressure pump but define low pressure, 12psi carb version of a fuel pump? How much LPH or whatever? I know its unlikely that I will run out of fuel that is in the surge tank unless I'm on a long straight away or something though. Joel, btw notice all the capital letters at the beginning of my sentences, lol. Next dyno should be close to 550, probably will not take it much over that for the timing being.