If nitrous oxide is added to an engine, what will the effect be?

If nitrous oxide is added to an engine, it adds more oxygen to the engine. Nitrous oxide, or N₂O, acts as an oxidizer rather than serving as the engine's fuel. At high combustion temperatures, the compound breaks down and releases oxygen that can support additional fuel burning.

That extra oxygen lets the engine burn more fuel during each cycle, increasing the energy released and therefore producing a temporary power boost. Nitrous oxide is stored as a pressurized liquid, and its vaporization in the intake also cools the incoming charge. The cooler charge becomes denser, allowing still more oxygen-containing mixture to enter the cylinders.

A common mix-up is calling the system “nitro.” Nitro usually refers to nitromethane, a different fuel used in some racing engines. Nitrous also does not automatically make an engine safe or invincible: fuel delivery, ignition timing, cooling, and engine strength must be matched to the added oxygen and cylinder pressure. Poorly calibrated systems can cause detonation or mechanical failure.