Not Ranked
I have sucessfully done 11:1 street motors than ran on 92 octane. The efficiency of the combustion chamber comes into play a lot as the line is being pushed a bit, aluminum heads are a must. Also they run closer to 11:1 air:fuel not the 13.5:1 that so many people think is always the optimum. But small block ford, single holley, over 500 ft/lbs from 2500 rpm up and over 500 hp as well. Measured at the flywheel, no correction factors.
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In a fit of 16 year old genius, I looked down through the carb while cranking it to see if fuel was flowing, and it was. Flowing straight up in a vapor cloud, around my head, on fire.
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