Originally Posted by ducatiguy

There's no "thingy" (well atleast nothing off the shelf or that comes with any system on the market right now) that tells (or that will cut) the nitrous system if your engines running lean. The system is either on (spraying) or off. A setup like that is possible and some do have it, but these are hardcore racers who are running custom mapped ECU's designed JUST for nitrous use and or have custom nitrous fual / ignition modules doing the same job. For your "stock" setup, it's all in your hands, and everyone keeps mentioning just make sure you run rich, but here we have someone asking BASIC info about a nitrouse system, and most likley does NOT know how to "run rich" or even perhaps what it takes. Adding an extra fuel pump will make certain you have the needed fuel supply, but depending on your fuel delivery (setup) it may not be enough. You will most definately need an adjustable EFI rated (hi-pressure) fuel pressure regulator and or ECU tunning (to electronically compensate for the richness). Going a 1 to 2 heat ranges colder than stock with plugs is also a good idea, but stay away from "but plugs"! NO I dont mean SEX toys, a "but plug" is known as of them fancy plugs that sell for like $30 a pop and when you go to buy them, the guy does down the list and says but these plugs have so and so, but these are better, but this, but that, but... Stay away from the "buts". Simple is always better!