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Vacuum leak? Running lean will increase combustion temp. Would explain the crappy dyno run.
And (since it was dug up out of the trash) higher octane gasoline does not burn slower!. It's reaction rate is just as great as lower octane fuel. Reaction initiation energy is higher as octane rating increases, but once the reaction is started, they all burn at the same speed, give or take.
And (since it was dug up out of the trash) higher octane gasoline does not burn slower!. It's reaction rate is just as great as lower octane fuel. Reaction initiation energy is higher as octane rating increases, but once the reaction is started, they all burn at the same speed, give or take.