I blew my bottom end out after 4 months of running nitrous 2xs a week at the track.I did between 5-8 passes a night on the bottle. My timing was set at 8 degrees retard, fuel pressure at 50psi with a 190lph pump, plugs two steps colder and gapped at 35. I even ran octane boost. Seems like my block couldnt handle, I was running a 100 shot also. Sucks I had to be towed home but at least I can stroke the bottom to a 347 now!!! I guess things happen for a reason.....