Originally Posted by TNathe
If you look at your first sentence, then your last one, you are in fact saying that running nitrous means your are NOT NA. Probably just a typo, but why would you consider a motor on N20 NA? You are in fact forcing a gas into the combustion chamber that allows more fuel to be added and burned.
You don't force gas into the combustion chamber when you use nitrous oxide, you are "injecting" it into the manifold/runners and the intake cycle still has to complete and suck in the nitrous that is out there. Forced induction forces oxygen into the combustion chamber, where as you can spray a 500shot on a car but it doesn't mean it's using all of it. Ever heard of nitrous pudling in runners/manifolds and causing the motor to blow?
Nitrous oxide is not forced induction.