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What is Nitrous Oxide System or NOS and How Does It Make The Car Go So Fast?


If you've watched the new 'Fast & Furious' movie maybe you've noticed that just like the first one 'The Fast and the Furious' you keep seeing those blue NOS bottles. So what is Nitrous Oxide or NOS and how does it make the car go so fast?


What is Nitrous? Simply put, Nitrous (N2O) creates large amounts of horsepower by creating more oxygen in the engines combustion chamber while simultaneously introducing additional fuel. The added oxygen allows the additional fuel to burn which creates increased horsepower for short bursts of torque and speed.

In applications for vehicle racing, nitrous oxide (often referred to as just "nitrous") allows the engine to burn more fuel by providing more oxygen than air alone, resulting in a more powerful combustion. The gas itself is not flammable at a low pressure/temperature, but it delivers more oxygen than atmospheric air by breaking down at elevated temperatures. Therefore, it is often mixed with another fuel that is easier to deflagrate.
Nitrous oxide is stored as a compressed liquid; the evaporation and expansion of liquid nitrous oxide in the intake manifold causes a large drop in intake charge temperature, resulting in a denser charge, further allowing more air/fuel mixture to enter the cylinder. Nitrous oxide is sometimes injected into (or prior to) the intake manifold, whereas other systems directly inject right before the cylinder (direct port injection) to increase power.

The technique was used during World War II by Luftwaffe aircraft with the GM-1 system to boost the power output of aircraft engines. Originally meant to provide the Luftwaffe standard aircraft with superior high-altitude performance, technological considerations limited its use to extremely high altitudes. Accordingly, it was only used by specialized planes like high-altitude reconnaissance aircraft, high-speed bombers, and high-altitude interceptor aircraft.

One of the major problems of using nitrous oxide in a reciprocating engine is that it can produce enough power to damage or destroy the engine. Very large power increases are possible, and if the mechanical structure of the engine is not properly reinforced, the engine may be severely damaged or destroyed during this kind of operation. It is very important with nitrous oxide augmentation of internal combustion engines to maintain proper operating temperatures and fuel levels to prevent "preignition", or "detonation" (sometimes referred to as "knock"). Most problems that are associated with nitrous do not come from mechanical failure due to the power increases. Since nitrous allows a much denser charge into the cylinder it dramatically increases cylinder pressures. The increased pressure and temperature can cause problems such as melting the piston or valves. It may also crack or warp the piston or head and cause preignition due to uneven heating.

Automotive-grade liquid nitrous oxide differs slightly from medical-grade nitrous oxide. A small amount of sulfur dioxide (SO2) is added to prevent substance abuse.[29] Multiple washes through a base (such as sodium hydroxide) can remove this, decreasing the corrosive properties observed when SO2 is further oxidized during combustion into sulfuric acid, making emissions cleaner

Watch this interactive video and learn more than you ever thought you'd know about Nitrous Oxide.


Source: en.wikipedia.org + boxwrench.net

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This was a fascinating read, especially since I did not know how nitrous actually worked. However, it does make sense that it would add more air into the system so that cars could burn gas quicker. That must be very helpful for racing and other situations where you need to move quickly. http://yearwoodperformance.com/n-11163-nitrous-oxide-part-1-of-3.html

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