Timing:
Behind fuel,timing is the most important area of Nitrous use to understand and follow. To get maximum power from a naturally aspirated or forced induction motor,you run the timing as high as detonation allows-you get max power there. By using better gas,you can put in more timing and get more power. Nitrous doesn't work that way. You must retard the timing when using Nitrous. Why? Because it pumps up cylinder pressure so much that detonation may occur,resulting usually in broken pistons and bent rods. You definitely don't want to do that!How to set timing:For every 50 hp in Nitrous you add to a motor,you must retard timing by 1-1/2 to 2 degrees in order not to damage parts. For a 150 hp kit,you would take 4-1/2 to 6 degrees of timing out. Since taking timing out when the car is not using Nitrous hurts power,you can either move the timing maually every time,or buy an ignition system that is controlable from inside the car when you want to.
and this isnt ebay, but a nitrious kit from an online store... asking for products in the forums will get you yelled at, hehe