[Adger Smith]

Marvin,
Yes, I've had the Rocket 114 in a couple of customers engines. I like to tune with the fuel the customer can get in his area of the country. I have done back to back with VP C-14 & C-12 and rocket 114 in one of my customers (Chicago area) 385 fast burn crate engines. The tune up (jet and timing ) was different to get the best power and torque avg's. Keep an open mind about tuneups. What works for engine X may not work for engine Y.
Sometimes a customer will think his fuel is the best, but testing different fuels can prove them right or wrong. I'm not an advocate of any particular fuel as "The Best" . There are too many engine combinations that have different needs from the fuel for one brand or blend to fit all. Last time I checked VP made 52 different blends. That should tell you something about the needs in the fuel market. I know there are companies that just sell 3 or 4 blends. I don't think that covers ever need for every engine. I think that they are just working their slice of the market, or market share if you want to call it that. Low compression engines have different problems with fuel than extreme cylinder pressure engines. The burn rate to RPM and combustion chamber shape should be considered. I might add one thing. the heat range & type plug you use can have an effect on how the fuel burns.
Take your engine:
Low compression, probably low cylinder pressure too. Spark plug location is not in the best place and it has a very bad quench to bore ratio. (chamber is not real active) Piston speed & stroke should be considered too. I would try to find a low octane fast burn rate fuel that gets along with the extra heat a low compression large combustion chamber engine has. Then start testing what it likes as to timing and jetting to get the best power avg and BSFC's. Call around and talk to the fuel MFG's that are available in your area of the country. Listen to what they say & try to get past the sales pitch. :~)
Good luck,