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Fuel Pressure Regulator
We supply either an adjustable Borla regulator with AN-6 fuel fittings or a non-adjustable OEM type
with O-ring sealed inlet and either barb outlet or 1/8 or ¼ female NPT outlet fitting. We recommend
the adjustable type have its fuel pressure set to 45-50 psi using the adjusting screw on the top of
the regulator with the engine not running. Both regulator types have a MAP reference hose port for
connection to intake manifold vacuum. Using other unproven regulators is not recommended as
failure can cause partial or complete power loss. The adjustable regulator should be rigidly
mounted to the firewall.
Non-adjustable and AN6 adjustable fuel pressure regulators
Fuel Pumps
We recommend using only the supplied/ recommended genuine Walbro pumps to ensure maximum
reliability and safety with regards to re-priming in the event of a dry tank condition and to be sure they
are properly matched to the hp of your engine. The use of other brands is not recommended as
failure can cause a partial or complete power loss condition.
We can supply either a single pump or dual pumps mounted in a module to allow easier plumbing and
mounting. Be sure to follow the safety/ assembly instructions that come with the pump
modules. Improper fitting assembly can cause line or pump blockage, leading to a partial or
complete power loss. Dual pumps should have separate power feeds, breakers and ground points
for maximum redundancy. Fuse each pump with a 15 amp fuse or breaker. Nominal current draw is
between 4.5 to 5.5 amps each at 14V, running at 45 psi pressure, depending on pump model.
Dual fuel pump module
On low wing aircraft, we recommend the pumps be mounted as low as possible on the floor,
preferably parallel to the floor. If you must mount the pumps vertically, mount them with the
outlets facing UP, never down. Inlet lines to the pumps should be 3/8 inch or AN6 with a minimum
number of fittings used. We recommend not using any 90 degree fittings if possible on the pump
inlets. Pump inlets should preferably be flooded by fuel at all times.
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