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Subject: RE: [LML] One mag, One electronic ignition
Thread-Topic: [LML] One mag, One electronic ignition
thread-index: AchONNOkq/UosoR1TM6pW1o2en6S+wAFR+gA
From: "Chuck Jensen" <cjensen@dts9000.com>

Steve,

The concern is appreciated but the dozens upon dozens of EI one side and =
Mag on the other installations that have flown for thousands of hours =
without problem should lay your concern to rest.  Whatever the dynamics, =
they do not seem to cause a problem with shortening mag life.

Chuck Jensen


-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net]On Behalf Of
Steve Colwell
Sent: Thursday, January 03, 2008 1:18 PM
To: lml@lancaironline.net
Subject: [LML] One mag, One electronic ignition


I have not done any tests but I believe if One Mag and One Electronic
Ignition is used you are likely to fail the Mag Coil prematurely (that =
would
reduce the aprox. 400 to 600 hour normal failure of a new Slick to a =
really
unacceptable life).  Why??  One of the principal advantages of EI is the
variable timing advance that improves power and efficiency.  When the EI
fires a plug before the Mag, the pressure rise from earlier combustion =
may
prevent the Mag plug from firing.  Maybe (probably?) preventing the Mag =
plug
from firing at least at higher altitudes where advance is the greatest. =
I
base my theory on the old Champion Spark Plug Testers that used an air =
hose
to increase pressure while firing a plug to check its ability to =
continue to
fire.  What do others say?=20


Steve Colwell


  >Gary said....
  >On the other question about dual electronic ignitions:
  >I was thinking about building mine with a dual electronic ignition  =
and
the
  >power source that I finally came up with (before I abandoned  the =
idea in
  >favor of using one mag)


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