What minimum octane #'s would you experienced guys want to run on a moderately cammed 454 BBC in a jet boat with a compression ratio of around 11:1? I have access to 110 & 112 octane race fuel and it's rather expensive. I have never run the boat much- (twice in 8 years), so in the past it has not been that big a problem. With todays fuel prices, its a problem. I have plans to pull it down and drop the compression to pump gas levels next winter but I want to come up with the most inexpensive concoction I can to get me by until then. I'm thinking some sort of cocktail composed of race gas, octane booster and premium unleaded should be worth my time to mix up. Any sugesstions?