I?m building a 9A with an IO-320. Long ago I selected an ANDAIR fuel selector valve over the selector VANS supplied. Now I?m at the point of installing the AIRFLOW pump/filter. VANS? instructions are based on VANS selector. The ANDAIR selector conflicts with that arrangement, VANS arrangement has the pump return line connecting upstream in the supply line via a Tee at the selector, with downstream tubing routed to the filter inlet. This does not work with the ANDAIR selector.
I came up with a solution. My solution is to rotate the pump 180 deg., run the supply tubing from the ANDIR to a tee mounted to the filter inlet with the return tubing attached to the top of the Tee. The pump discharge would be routed directly from the pump to the firewall. In affect this relocates the return line from the fuel valve to the inlet to the filter. To me it looks like same same, just a few inches difference from the tee at the selector valve.
Question: is this approach acceptable? Yes I will have to make a somewhat bigger pump/filter housing box to accommodate this chance.
I came up with a solution. My solution is to rotate the pump 180 deg., run the supply tubing from the ANDIR to a tee mounted to the filter inlet with the return tubing attached to the top of the Tee. The pump discharge would be routed directly from the pump to the firewall. In affect this relocates the return line from the fuel valve to the inlet to the filter. To me it looks like same same, just a few inches difference from the tee at the selector valve.
Question: is this approach acceptable? Yes I will have to make a somewhat bigger pump/filter housing box to accommodate this chance.