[Dave at Pelican Parts]

It can evidently be handy to be able to set a specific fuel pressure; I am told that some carbs "like" a little less and some a little more. If you run into one of those cases, a regulator is very good to have.

There are a couple of different ways to regulate fuel. One only allows a certain pressure past it. Those are what you use in a return-less system. The other actually plugs the "far end" of the fuel system, raising the pressure of everything between the pump and the regulator. The fuel does keep pumping, and excess fuel over the amount required to maintain the pressure is dumped into the return line, going back to the tank.

Which setup is better? I have no idea. I'm not a carb person. The FI pump works the second way, so that is what I'm familiar with.

--DD