Now I'm aware of how at around 300 degrees C N2O breaks apart, resulting in more oxygen in the cylinders. I'm also aware that N2O cools down the air fuel mixture when it evaporates, increasing density and resulting in more volumetric efficiency. What I don't get, is why not just take in more air? Is it because there is maximum cylinder displacement, so no more can be taken in, and using nitrous oxide is the only other way to add more oxygen when at maximum volume? Is extra fuel automatically added to match the increased oxygen? Where is the N2O sprayed? As in, at which point? Many thanks.