Fuel System Thread, AN-6 Plumbing for my /6 Options

[billd]

I finally got some time over the long weekend a few weeks ago to plumb the fuel system for my /6. I'd appreciate any comments experienced club members may have.

When I did my /4 I used 5/16 stainless tube and just clamped rubber hose to the tube. For my /6, I decided to be a bit more professional. I ran 3/8 steel tube and used AN-6 fittings throughout the high-pressure section - from the pump output to the return tube. I used hard line wherever possible. There are just three sections of Aeroquip socketless hose (I like this better than braided stainless): to the engine fuel rails, from the engine fuel rails, and from the pump to the line through the tunnel.

The lines for the tunnel start under the tank as shown in this photo. The supply line is flared and connected to socketless hose with AN connectors. The return line has a 5/16 rubber hose clamped to it. The other end clamps to the return tube on the tank.


The other end of the tunnel lines are bent around the /6 engine mount and connected via AN-6 unions to hard line that runs to bulkhead fittings in the sheet metal on the edge of the engine compartment.


The supply line runs up through the sheet metal near the firewall to a second fuel filter (third if you count the sock in the tank) mounted on the fire wall.