nitrous

nitraatti-, typpi-, salpietari- puhekieltä of, relating to, or derived from nitrogen, especially in which the valence of the nitrogen is lower than that of a corresponding nitric species
puhekieltä of, or relating to nitrous acid or its derivatives
puhekieltä having a sharp odor like ammonia or nitric acid
puhekieltä nitrous oxide|Nitrous oxide.
puhekieltä The system in some racing vehicles which pumps nitrous oxide into the engine to improve performance.
2002, Mike Kojima, Honda/Acura Engine Performance: How to Modify D, B and H Series Honda/Acura Engines for Street and Drag Racing Performance, Penguin (ISBN 9781557883841), page 111

When a shot this big is being run, it will also be necessary to pull 6-10 degrees of timing out when the nitrous is being run.

To simulate nitrous, we will use a very simple approach: apply a large force to the back of the car when the nitrous is on.

When tested on a typical summer day, an engine with fuel fed by an annular discharge booster could be 10 hp less over a stepped dogleg booster, but 10 hp more when the nitrous is in operation.