[Diy_efi] Timing Advance Curve?

[Mike]

Just a minute are you saying that after there's spontaneous
combustion some way from the spark plug - theres no flame front
coming from it,

How can there be this combusition if there's no flame,

huh ?


And yes of course preignition and detonation are different source
phenomena, did you think I stated they were the same, I didnt.


rgds

mike



At 01:50 PM 12/20/02 -0500, you wrote:
>
>> We are not talking abnormal combustion, detonation is a meeting of
>> flame fronts, one comes from the spark ignition - the other comes
>> from that region of the chamber that spontaneously ignites due
>> to either an instantaneous rise in temperature or pressure.
>
>Preignition and detonation are two distinct phenomenon.  Preignition
>may precipitate detonation, but it is not necessary to produce it.
>Detonation is the spontaneous combustion of end gasses in the
>chamber, it has no flame front.
>
>You guys really need to read some papers and books, start with
>"The Background Of Detonation," NACA No. 93 by Stanwood Sparrow
>and move on through the several dozen other papers specifically
>detailing detonation and then read Ricardo and Heywood to put
>it all together.
>
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