Quote:
Originally Posted by enkeivette
PS. I think pulling timing can help with detonation, but detonation is basically dieseling isn't it? So at a certain point, it shouldn't matter how much timing you pull, or even if there is a spark at all. Or am I missing something?
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Detonation is caused by the fuel igniting before the piston has reach TDC. The pinging sound you hear is from the air/fuel mixture igniting while the piston is still traveling up. The pre-ignition is trying to force the piston back down before it has reach TDC. This can be controlled by having the mixture ignited at a later time (less ignitial timing).