he kids you not, i don't exactly know how it works, but what i do know is my buddy had a 4g63, put it on the dyno, made 300 and some whp, did it with a 50 shot, got 400 some whp.

im guessing its because more was forced into the cylinders with each stroke, instead of just sucking it in if you were NA, or because the gas entering is so hot that the nitrous is able to cool it even better. but don't quote me on that