I finally got to test the fuel system on my plane tonight. I am curious about a difference I saw between the two sides of the system. I purchased my fuel lines (firewall to selector, selector to fuselage sides, and tanks to fuselage) from Aircraft Specialty. I used the kit stock Andair fuel valve, boost pump, and filter. The tanks were built to plans. Nothing comes to mind that would be different between the two sides.
However, the flow is definitely not the same. We started on the left, then did the right, and then did the left again. I disconnected the fuel line from the input to the fuel flow servo, selected a tank, and ran the boost pump. We got the pump and lines primed by flowing about 10 oz of gasoline out the line before we did the measurement. Then we did a 30-second timed run. The left side put out 26 oz in that time (24.3 gph). The right side put out 43 oz in the same time (40.3 gph). We tested the left side again and got the same results. The flow from the right side also appeared smoother than the left.
Other than an obstruction in the fuel lines somewhere, are there any likely causes to check for?
However, the flow is definitely not the same. We started on the left, then did the right, and then did the left again. I disconnected the fuel line from the input to the fuel flow servo, selected a tank, and ran the boost pump. We got the pump and lines primed by flowing about 10 oz of gasoline out the line before we did the measurement. Then we did a 30-second timed run. The left side put out 26 oz in that time (24.3 gph). The right side put out 43 oz in the same time (40.3 gph). We tested the left side again and got the same results. The flow from the right side also appeared smoother than the left.
Other than an obstruction in the fuel lines somewhere, are there any likely causes to check for?