I wouldn't spray more than 100. Unless you have a forged bottom end and reinforced intake manifold. The problem with wet kits is the puddling, as the tracts in our manifold can puddle easily. On top of that, not all of the nitrous/fuel is dispersed evenly into the cylinders (unless you have a direct port kit). Even with a 100 shot, you should get a better fuel pump (such as a SVT focus or GT40 pump) and shorten the fuel lines. The nitrous travels through those lines much faster than the fuel, and you don't want that to happen.