Contour Enthusiasts Group Archives Forums Modifications Forced Induction What does your Walbro sound like?

They are all noisy.

When you have a full tank you don't hear it. It is only when you get down to about 1/4 tank that it sets up a good whine.
I monitored the fuel pressures with it on my system and the fuel pressure regulator still regulates to 45psi at idle, just like stock and 55psi wide open throttle. I can't see it being too big for the system if the pressures are still being where they are supposed to be. If it was too much the regulator would be wide open and the pressure at idle would be higher than 45psi. THEN you would have to change it.
If you don't need that much pump then don't used it. Are you return style or returnless. I didn't look at your info.