Wet and Dry Systems

The Difference between Wet & Dry Systems

A fuel injected dry manifold system uses a nitrous ONLY injector to deliver only nitrous oxide to the intake. A wet manifold system introduces fuel and nitrous into the intake manifold usually through a combined fuel and nitrous injector. With a dry manifold system, the additional fuel is supplied by increasing fuel delivery through the original fuel injectors when the nitrous system is activated. It is called a dry manifold system because there isn't any fuel present in the intake manifold.
How the kit works

The Nitrous oxide injection kit begins with a supply cylinder containing pressurised 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 usually mounted in a cool area under the bonnet, is engaged and disengaged via a throttle switch (either a micro-switch or an electronic unit). The fuel solenoid valve receives fuel from a 'T' piece, which is tapped into the fuel delivery line, this is also activated by the same switch. The nitrous oxide and fuel that is to be delivered to the engine's air inlet is conveyed via two delivery lines to an injector mounted in the inlet tract. The amount of nitrous oxide and fuel is adjustable by means of metering jets installed in the solenoid outlet fittings.

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