Reply to thread

Message: <blockquote data-quote="chaz" data-source="post: 611126" data-attributes="member: 11847">Here is a little more info on NOS, I think it is a great thing to add to a car to get you 75 to 100 hp when ever you want and it gives you time to save for a full build, SC or turboNitrous Oxide is stored as a liquid under pressure and turns into a gas once it expands. This expansion is referred to as boiling. Nitrous boils at 129.1* below zero. As the gas enters the air intake it significantly reduces the air intake temperatures. This cooler temperature means the air is denser. This is a great benefit; however it is not the reason for the main increase in power. (Many boosted applications use nitrous just for cooling the air intake and to absorb heat soak.)The main increase in power comes from the ability to burn more fuel from a controlled combustion process. Let me explain.As the nitrous enters the combustion chamber it will break down separating the nitrogen and oxygen molecules. This happens due to the fact that Nitrous breaks down at temperatures of 565-575*F. The combustion temperatures greatly exceed this temperature. As the bond breaks apart the nitrogen acts as a heat absorbent and the oxygen increases the ability to burn more fuel. It is important to feed the oxygen with the correct amount of fuel needed in order to avoid a lean condition. With the increase in the amount of fuel being burned it will increase the cylinder pressure upon compression stroke. As a result the piston will be returned at a faster rate than normal. (Oxygen + Fuel + Cylinder pressure = HP) Controlling DetonationDetonation can lead to engine failure. To avoid detonation controlling the combustion process is very important. This is done by controlling the burn rate through air fuel and timing.Controlling the air fuel is achieved by providing the increase in oxygen with the amount of fuel needed. By providing the correct amount of fuel it will avoid a lean condition that causes heat in the cylinder.Retarding timing to control cylinder pressure is important to avoid pre mature combustion, other wise known as detonation. Also run a stage cooler spark plugsWet kits add fuel when the nos is spraying so you don't need to change injector'sWhen I run NOS i have it tuned to run 12.5 AFR normal driving and 10.5-10.9 when spraying to be safe, i also retard the timing 2 deg for every 50 shot I spray with 1 step cooler plugs. Read up on it and you will see that its not bad for the motor, you can start at a 50 shot this would be equal to about 4-5 lbs of boost. After you know what your doing you can go a 75-100-125 shot on stock motor. I would only go to 125 max.</blockquote>