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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.
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 "knocking" or "pinging"). 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 results in heat, and heat will cause many problems from melting the piston, valves or warping the head/cracking or predetonation.
From: Greater Detroit Metro MI, when I'm not travelling.
Originally Posted by user_name
I don't think N02 is going to add horsepower. I've used N2O before though. It works.
Actually Nitrogen Dioxide (NO2) works great; the Germans used it as a rocket propellant back in WW2; its got more than 4 times the oxygen per weight of N2O... It does come with a few drawbacks though...
1- Hypergolic (spontaneous ignition in contact with fuels).
2- Explosive combustion rates (you haven't seen an engine "knock" untill you've seen what it does when there is something other than Oxygen in the combustion chamber )
3- Highly corrosive (Forms Nitric Acid in contact with moisture, exhaust byproducts contain Nitric Acid).
4- Extremely toxic (one lungfull will kill you).
Actually Nitrogen Dioxide (NO2) works great; the Germans used it as a rocket propellant back in WW2; its got more than 4 times the oxygen per weight of N2O... It does come with a few drawbacks though...
1- Hypergolic (spontaneous ignition in contact with fuels).
2- Explosive combustion rates (you haven't seen an engine "knock" untill you've seen what it does when there is something other than Oxygen in the combustion chamber )
3- Highly corrosive (Forms Nitric Acid in contact with moisture, exhaust byproducts contain Nitric Acid).
4- Extremely toxic (one lungfull will kill you).
Nitrous is the lowest cost modification and best bang for the buck.
All stock with 100 hp wet kit was a kick in the pants to drive. I should have stopped the mod bug right there!