[Tom Vaught]

I wanted to post a bit of information about how Holley Transferred the fuel from the Single Inlet Fuel Fill Banjo Fitting to both carb fuel bowls.

1) Fuel comes from the Fuel Pump/fuel filter thru a hose to the Banjo Fitting on the Primary Bowl of the Holley 4160 Carb. Pic #1 Post #310

2) There is a drilling in the fuel bowl close to the Banjo Fitting pointing towards the rear bowl. Pic #1 Post #310


3) There is a second drilling facing the Primary Bowl on the Secondary Bowl. Pic #1 Post #310


4) A aluminum tube with two raised sealing surfaces near the edge of the tube transferred the fuel between the bowls. Pic #2 Post #309


5) In order for the fuel to not leak past the aluminum tube ends a simple o-ring was installed over the tube end and the o-ring lubed up with a touch of vasoline and was inserted in one of the bowls drilled cavity. Pic #3 Post #309

6) A second o-ring using vasoline is installed on the tube and the into the other drilling in the other fuel bowl. It does not matter which one you install first. I work typically on the Primary Bowl components first so the secondary bowl gets installed at the last step.

Here are some pictures of both the old style O-ring transfer tube assy and the New style assy. Pic #4 & 5 Post #309

Tom V.