[T3] knock, knock?

[Toby Basiliko <toby@wolfenet.com>]

OK, Toby,
	You said it, so now you gotta explain:  What's the difference between
the spark knock- pinging, pinking-  you've been describing and
pre-ignition?  
	I was under the impression that it was all pre-ignition, and that there
are a number of things that cause it (hot spots, carbon, high cr, low
octane,early timing, etc) in different conditions, but that, in the end,
it's all caused by gas igniting too soon.
	Leaving out entirely, of course, mechanical knocks like bearings or,
"oops, just dropped a nut into the spark plug hole!"

Am I putting the wrong words in your mouth, or are you really talking
about two different things?
The other Toby

Erkson, Toby wrote:
> 
> Yep.  Remove all sharp edges from the combustion chamber, except the spark
> plug
> electrode.  If any threads from the spark plug or spark plug hole show then
> the

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