Nitrous on 360

As lead69 said, no need to open up ring gaps for 100>150 shot, I ran stock gaps on up to a 175 big shot on my junk. Most important is a good stable N20 fuel supply, timing wise is all dependent on how you run the tune, run it with square jets or even slightly larger petrol jet and you don't need large amounts of retard. Run it "clean(smaller petrol jet)" for more power and you need to be more careful and have enough retard. All this talk of large ring gaps, 10deg+ retards etc. is all dependent on the combo efficiency/tune/fuel and generally for hits of 250+.