Take a look at my detailed
response to Scott.
Your general understanding of the theory of electronic ignition
"benefits" is mostly correct - - but the implications that this results in a
"better" combustion event and a better outcome for the cylinder does not
necessarily follow.
Keep
in mind, that after even the "best" spark event, it takes a while
for the combustion flame front to get organized. Once it is
organized, the spark is long finished, and the flame front doesn't "know
or care" if it was a spark plug or a match that started the
event.
Regards, George
'Use of the LASAR electronic
ignition lowers the EGT actual temperatures by 70 to 90 degrees F from that
delivered by the use of magnetos.
That is an indicator that the REAL timing is NOT right. Lower
EGTS are the result of advanced timing. This is NOT good. If the
timing is correct the EGTs will NOT be lower. PERIOD. This is one
example of when lower temps are NOT good.
We have tested magnetos and
electronic devices and find that the actual spark event does not coincide.
This can be VERY bad.'
Would not the lower EGTs with electronic ignition
be caused by more complete combustion before the exhaust valve opens to let
still-burning gases flow over the probe? My totally amateur understanding is
that electronic ignition fires earlier before top dead center at cruise rpms
than does a magneto, it fires for a longer period of time, and with
higher voltage allowing a larger plug gap, all seemingly contributors to more
complete consumption of the fuel/air charge.
I'm asking in order to learn--I don't pretend to
know. Wendell Durr
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