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In a message dated 3/25/2005 10:49:10 PM Eastern Standard Time, Walter@advancedpilot.com writes:
Thank you for the thorough explanation of the event s as you understand
them.
**Both problems are commonly lumped together and low octane and high
cylinder temps can result in either one. When preignition gets bad, it
will destroy the engine faster than detonation. It also is harder to
detect preignition before serious damage is done.**
Both are commonly but incorrectly lumped together. They are two very
different events.
Walter
I guess my atrocious english is rearing its ugly head again. You are quite correct and that is how I should have worded my statement.
Further, the data indicates that it is actually quite likely that
damage from detonation as you have listed and is commonly sited is
really a result of preignition. We have observed extended periods of
detonation in which there is no damage whatsoever to the cylinder,
rings, valves, etc. I realize that this is counter to the conventional
wisdom, but it is in harmony with the observed data.
Do you have a source for the data you refer to? I would like to read up on it.
I was fortunate enough not to generate very much data of my own. Just two broken pistons and one broken ring. I scattered two engines, but that was due to alternate forms of stupidity.
Rob
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