Most N2O systems on the market today are set up by the jet sizes and that particular size is for a particular HP level. Although it may say it is a 100HP, it is set up so rich, that the chance of anything going wrong are slim to none. The down side is that your actual net gain is nowhere near a 100 HP. It is closer to 75 HP, with a gain of maybe 50 HP at the rear wheels.
To find that out, tune your car on a Dyno that has O2 sensors. I will guarantee you that your A/F ratio is closer to 10 to 1 (N2O on)rather than 13 or 13.5 to 1 (N/A) which is really optimum. It's the manufacturers way of keeping themselves out of trouble, and any liability.
Keep it rich, and minimize the chance of an explosion. NX Express which manufactures the Gemini twin plate system however, are a bit different. With twin spray bars, they use almost the same jet sizes as NOS on a single spray bar. You think their system performs better...of course it does, their 100 HP rating is really a 100 HP because of the dual jets. So be careful and you will be fine. (And do some reading on the subject...Joe Pettitt book on Notrous is excellent)
Ron
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