If your are going to start pushing higher than a 75 shot, I would recommend going with a direct port system (basically you mount a nossle before each cylinder directly into the intake manifold, like your fuel injectors) and consider upgrading the internal components of the engine (rods and pistons). You really shouldn't try to push more than half the stock HP out of nitrous with stock parts, your going to break something. By the way, 11.9 is damn impressive, good job. Seeya.