I'd go with a wet kit... injects additional fuel as well... lot safer. Your primary danger with running nitrous is having the engine run too lean, which leads to too hot, which kills.

For a mostly stock engine, I'd start at a 50 shot. Learn how to use it, when to use it, and the limits of the system. Then, if you want more, start increasing the injection amount slowly and carefully... but i wouldn't exceed 75 on a stock motor. At that point, you're reaching the limits of your internals.


As speedra mentioned, you should hook it up to your TPS, so that you can only spray when the throttle body is over 80% open or so. Otherwise, when shifting gears, the closed TB could cause the gas to collect and give you problems when you hit the gas again. Also, hitting the button with very little throttle is pretty catastrophic.

I'd also invest in a few gagues- air/fuel ratio, EGT (exhaust gas temp), and nitrous pressure, if you're serious about this. It'll help you avoid damage. Go with the computerized system as well. I'd rather spend a few more hundred dollars and get a safe, reliable, full-blown system... than blow the engine.