Subject: Fuel transfer/polishing pump
From: "Doug Dotson"

Makes sense, but there is quite alot of evidence out there that
a polishing system is a good thing to have. I can't really
increase the size of my on-engine filter. I could increase the
size of the Raycor, but at the pore sizes I run (30 micron) in it make it
necessary to change the on-engine filter regularly as well.
Bigger Raycor won't fix the problem.

What's the GPH on your engine?

If you go to a larger Racor you could easily change to a smaller micron
element. It fact, I have never understood why people don't run as small a
micron element as they can in the first filter after the fuel tank. Why let
anything near the micron size of the engine mounted filter get to that filter
at all?

Capt. Bill