Editing Nitrous oxide engine (section)

===Wet===
In a ''wet'' nitrous system the nitrous delivery method provides nitrous and fuel together resulting in the intake manifold being "wet" with fuel, giving the category its name. Wet nitrous systems can be used in all four main delivery methods.

In wet systems on fuel/direct injected engines care must be taken to avoid backfires caused by fuel pooling in the intake tract or manifold and/or uneven distribution of the nitrous/fuel mixture. Port and direct fuel injection engines have intake systems engineered for the delivery of air only, not air and fuel. Since most fuels are heavier than air and not in a gaseous state when used with nitrous systems it does not behave in the same way as air alone; thus the possibility of the fuel being unevenly distributed to the combustion chambers of the engine causing lean conditions/detonation and/or pooling in parts of the intake tract/manifold presenting a dangerous situation in which the fuel may be ignited uncontrollably causing catastrophic failure to components. Carbureted and single point/throttle body injected engines use a wet manifold design that is engineered to evenly distribute fuel and air mixtures to all combustion chambers, making this mostly a non-issue for these applications.