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Originally Posted by blue2000s
High octane fuel allows for high compression. High compression allows for higher power per liter of displacement.
We could get into spark timing, but you asked for the simplest level.
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High octane reduces knocking at high compression ratios by making the fuel harder to ignite (otherwise the engine would be prone to detonation or "diesel"ing at high compression ratios). Higher compression ratios improves engine efficiency which increases power per liter of displacement.
Read more here: http://en.wikipedia.org/wiki/Engine_knocking
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Last edited by thstone; 09-10-2011 at 10:42 PM.
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