Hey guys yes its ME again with yet again another question, sorry! I am trying to work out a satisfactory fuel solution for at my lake house which is in MN and the only place on my lake that sells fuel is the 10% Ethanol which in the end comes out to like 85 octane, I know that is to low for my boat and I really dont want to run any Ethanol at all, its pretty much an all around pain.
My boat is running a 9 to 1 compression ration with good heads and a full roller cam etc, the trickier part is the engine is supercharged but only pushing 4 pounds of boost, the engine is carburated and has no detonation sensors of any kind except my ears. The normal usage for the boat will be in the 3500 to 4000 RPM range with an occasional bursts to 6000 RPM and they would be short in duration. With this information can I get by on 91 octane no Ethanol fuel? I know the easy answer is to buy 107 and cut it 50/50 with 91 octane which would give me a final rating of around 107, I am trying to avoid that if possible?
Thoughts anyone?
Karl