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08-05-2009, 04:21 PM
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#23 |
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Half a Bubble Off Plumb
Drives: 2009 Yaris Sedan Join Date: Mar 2009
Location: Bristol, Tennessee, USA
Posts: 1,593
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Higher octane doesn't mean it's harder to burn, just that it's slower to autoignite when heated to a temperature where that can occur.
Preignition is different from detonation in that detonation occurs after the spark has fired, in the part of the fuel/air mixture that hasn't yet been reached by the expanding flame front from the spark. Preignition is caused by hot spots in the chamber igniting the fuel before the spark fires. High octane won't fix that. |
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