Hi.
not sure if I've posted my fuel setup before, but attached is a picture
of the pumps during testing prior to installation. Has been in for
awhile now and seems to work well. basic idea was for semi returnless
and to minimize piping & joins, as they are my nemisis.
Basically
a manifold with low & high pressure galleries, 2 walbro pumps, 2
filters, pressure regulator, pressure & flow senders, optical level
sender in low pressure side and NC gas solonoid to allow vapour lock
release (never needed yet) and fuel transfer (used to empty last fuel
from tip tanks into right main tank). also bleed back from high to low
side under the regulator, just a drilled hole with a jet from a carby
pressed in (relieves pressure after shutdown and dumps enough fuel so
regulator can still cope just in case both pumps are on).
Fuel
is stored in 4 wing tanks connected to valve from a Piper aircraft.
through a strainer, boost pump (standby/transfer) then into low pressure
side of manifold, out from flow sensor to fuel rail. for majority of
fuel lines I used Gates Barricade hose.
If boost pump is off
and the solonoid valve on, it does allow fuel flow back from right main
into manifold, bypassing selecter valve, strainer & boost pump.
obviously this mode would only be used in an emergency.
Everyday use is very simple. select tank, turn 1 pump on. go fly. have not had to use boost pump before or during flight.
Andrew