There are plenty of cars that run 93 in the stock tank and race gas in the nitrous cell. Most of them are street cars and some of them are in the mid 5's. I can think of about 5 cars that I personally know that run that setup and they haven't had an issue yet. Once you get the tune up right I dont see how the mixture would change. Your always running 93 through the carb and when the nitrous hits its 112 through the plate.
Thats what we run in brandon's car and we have the tune up spot on. We haven't had any nitrous back fires, burnt plugs, or anything. Hell marcus even hit the rev limiter when the driveshaft spit out and the nitrous was on.
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