I am fortunate enough to have access to 100LL at a local municipal airport.
About 4 bucks a gallon. I don't even need to run it at 100%, but sometimes do.
About half and half with 92 works just fine. I don't have access to 93 at the pump around here.
IIRC I calculated the actual CR on my LT-1 spec engine at 11.25, and I simply could not run with aggressive timing on straight 92. Runs like a scalded dog on the AV gas and the timing bumped a bit. Aggressive curve, all in at 3k rpm, total mechanical advance of 38.
It was still pinging slightly even with timing back at 32 to 34. Tried Torco octane booster. I cured the pinging, but fouled plugs something awful. Still have about 3 gallons I would give away if someone wanted it.
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04-23-2021, 04:26 AM
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