A recent BS flag by one of our members has led me to realize that most of us don't know jack about "the juice." Poor clueless saps see TF&TF and immediately think, "I need NOS." This is some of the stupidest thinking in high performance four cylinders. Four cylinders of the high performance variety make their power one of three ways: high compression, turbocharging, or supercharging. None of these three are compatible and shouldn't be used at the same time.
Now, once you have all the power that your built up four cylinder drag motor can make and you still aren't satisfied, you add some laughing gas, that's right N2O.
In my humble opinion, the only safe nitrous is wet nitrous. This system consists of a fuel/nitrous MIXED injection immediately above the intake valve of each cylinder. The N2O can also be introduced into the fuel system using the stock fuel system, as long as the injectors are big enough and the static fuel pressure is high enough. If you are 17 years old and think a dry nitrous system is your ticket to a 12 second daily driver, you WILL have to rebuild your motor if you spray even twice a month.
Since I don't know everything about Ntrous Oxide (N2O or NOx)and I dont' have to: here is a link to the experts.