How Nitrous Oxide works
By injecting nitrous oxide into the combustion chamber of an internal combustion engine the dynamic cylinder pressure within the engine is increased dramatically. This injection can act the same as a supercharger and is brought about by a powerful escalation in an engines compression ratio.
When nitrous oxide is injected into the combustion chamber of an engine, an extremely oxygen rich mixture is the result as the temperature of the charge air reaches 565 degrees F. By adding fuel at the same time as the nitrous oxide injection, the compression ratio of the engine is significantly increased. This procedure is used to produce short bursts of power and is often compared to the afterburner of a jet.
We are able to take advantage of this effect because nitrous oxide possesses a higher percentage of oxygen than the air that we breathe. Where the atmosphere has only 23%, oxygen nitrous oxide has 36% and at the same pressure nitrous oxide is 50% more dense than air. As a result of this, nitrous oxide per cubic foot has 2.3 times as much oxygen as air. By carrying out some simple calculations in your head you will be able to appreciate that by replacing some air with nitrous oxide and adding the required amount of fuel into your engine, the power of your engine is going to increase drastically.