Re: 92 Octane for Nitrous?
You don't "have" to, however in order to run nitrous on less you will have to pull timing to avoid detonation which will in turn decrease your power. Also, the lower the octane, the better the chance of detonation even with lower timing.
You don't want to mess around with nitrous and try to "make it work". Nitrous is something that requires a good tune and good gas or else you can efficiently take apart your motor. It's not something to try and skimp on. It's one of those "Do it right, or don't do it at all" kind of things.
"When I know more, I'll be forthcoming. Or I won't be forthcoming, and I'll be honestly deceptive." - Les Miles