The Nitrous oxide injection kit begins with
a supply cylinder containing pressurized liquid nitrous oxide.
This cylinder is connected by means of a delivery hose to
a normally closed electric solenoid valve. This solenoid valve,
which is attached to a manifold assembly, is engaged and disengaged
via the TPS switch. The manifold assembly distributes the
nitrous oxide to the engine's air inlet and the kit's supplemental
fuel control circuit. The nitrous oxide that is delivered
to the engine's air inlet is conveyed via a delivery hose
to an injection nozzle. The amount of nitrous oxide, which
provides the oxygen required for the horsepower increase,
is adjustable by means of a metering jet installed in the
injection nozzle itself. The nitrous oxide that is distributed
to the fuel control circuit passes through a small bleed orifice.
This bleed orifice provides a reference source of bottle
pressure and a controllable source of pressure to perform
the needed function of fuel enrichment. Fuel enrichment occurs
by conveying this source of pressure through a delivery hose
to a vacuum ported fuel pressure regulator. This source of
pressure on the rubber diaphragm of the fuel pressure regulator
causes an increase in fuel pressure. This increase in fuel
pressure performs the function of adding fuel volume through
the engine's own injectors. The amount of additional fuel
that is added can be changed by an adjustable metering jet
in the fuel control circuit. This jet accomplishes the task
by controlling the amount of pressure allowed to build in
the delivery hose to the fuel pressure regulator.
The jet bleeds off excess pressure in the fuel control circuit
and vents it through a delivery tube, back to the intake manifold
plenum.
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