To spray or not to spray
Couldn't have said it any better there QH. There is nothing wrong with nitrous and it WILL NOT hurt your motor if you know what you are doing and have the fuel system to support it. Like Crackedback said.....pretty much any motor out there will handle a 100-150 shot with no problems at all and a 100 shot takes my 13.0 down to 11.85 with pump gas. No problems with my motor. Just make sure you don't run lean and pull the timing out and it will be fine. Yes I have ran out of bottle and yes it is kinda embarrassing but what's life with out some embarrassment.
If you don't like using it....FINE no problems but don't go around telling people they will blow their motor if they run it especially if YOU have never used it. I was really nervous about spraying the first time but now I'm hooked and I will build the next motor to handle an even bigger shot. It's nice having a nice docile street motor while cruising around and then with a little bit of drugs it's an animal.