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Fuel Pumps In Multi-Port fuel injection systems, the fuel pump(s) must be able to
supply enough fuel at full engine load to maintain at least 44.5 psi (3
bar) at the fuel rail. At idle, however, your fuel pressure regulator(s)
and return line must be able to "dump" enough fuel to maintain that same
pressure. Multi-Port systems use a high pressure pump. Throttle body injection
systems typically require a low pressure pump supplying 15 to 20 psi of
fuel pressure. Three different fuel pumps are listed below. Other pumps
may be available, contact Electromotive for assistance.
A fuel filter is required between the fuel tank and the pump. For
best results, pump and filter should be mounted low and near the tank.
Fuel Rail Stock Unique applications often require custom fuel rails. Unmachined aluminum extruded fuel rail stock is available in 6 ft. lengths. The fuel supply tube runs the length of the rail and has an inside diameter suitable for threading to 3/8" NPT.
Fuel Injectors Electromotive stocks high precision, port style fuel injectors of the
latest design. These injectors feature accurate flow rates, low injector
to injector variation, excellent fuel atomization and wide dynamic range.
They are available in both low and high resistance varieties and all have
O-ring on both ends for safe, leak-free installation into your fuel rail
and manifold. High resistance (> 12 ohms) injectors are used where only
one injector is driven by one driver, as in most True Sequential Fuel
Injection applications. Contact Electromotive
for assistance sizing injectors for your application.
Fuel Pressure Regulator Fuel injection systems rely on a known fuel ressure differential across
the injectors. To maintain that pressure, a manifold vacuum referenced
fuel pressure regulator is required. Electromotive offers two styles:
an O-ring regulator designed to mount on the fuel rail and one using hose
barbs for all connections. All regulators have a barb fitting for the
return side to recirculate excess fuel to the tank.
Fuel Injector Boss, Cap and Assembly Electromotive offers fuel injector bosses for adding Multi-Port fuel
injectors to manifolds or throttle bodies. These billet aluminum inserts
come either threaded (3/4" - 16) or 3/4" OD non-threaded. The insert bore
is machined to accept the O-ring or port type injectors. The bosses may
be epoxied or welded into your manifold. Fuel can be supplied with a fuel
rail or with a billet aluminum injector cap (using a standard AN-4 fitting)
and hold down assembly.
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