Not Ranked
The way it was explained to me is that a long duration cam will bleed off cylinder pressure at lower rpm's, but at the working rpm of the motor, you still need the fuel to have the octane rating that the static compression dictates. So if your cam (and rest of motor) is made to run 8000 rpm, you can put around town on lower octane gas, but if you are going to run it to 8000, you need the proper octane rating. What I have seen is when a high compression motor is putt-putted around on too low octane fuel, it just fouls up the plugs, but when put to hard work on the same fuel, it cracks spark plug insulators. You all do what you want with toluene and your $10,000 motors, I would rather buy sunoco 114 and mix that with 92.
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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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