I've had spray on my 112,000 mile shortblock for 4+ years now. Most of the time a 150 shot. Over 100 nitrous passes probably 8-10 bottles per year. After all that it still gets faster every year, uses no oil, and runs perfect. Get the necessary safety equipment, proper fuel system mods, good oil and proper oil level, and most of all a damn good tune.
Yeah +1 on both of yous guys lol...don't pull a me hahai ran a 125 on my car untuned. i know of some people that have run up to a 150 untuned but i dunno if i would try and go that high.