Quote Originally Posted by 65ny View Post
This is not intended to hijack... but perhaps it will be of some benefit...
With a pressure regulator, is a return line required? This may sound like a dumb question, but if the fuel pump is putting out say.... 10 lbs of pressure, and the regulator knocks it down to 3 lbs, where does the other 7 lbs of pressure go? It seems like the pressure would just build up. Am I wrong?
I'm sure there is a completely simple explanation, but it escapes me.
no your right it can dead head the pump. if it need a small amount of fuel psi and over heats the pump if it has no bypass .free flow is much better you reg the bypass . i built some with a by pass .BUT my cars still have the old holley s with no returns