Skip;
Electronic guages are sensitive to radiated & conducted electrical noise and
a magneto is a pretty powerful interference generator. The problem can be
licked by careful grounding and especially shielding of the guage wiring. A
low- pass filter might be required in stubborn cases.
This problem isn't only limited to magnetos, any high- output ignition
system with fast rise times can create enough electrical noise to cause
electronic guage problems.
Regards, Neil Tucson, AZ
-----Original Message-----
From: Skip Higginbotham [mailto:saltrat@pro-blend.com]
Sent: Saturday, August 24, 2002 6:33 AM
To: Jim Dincau; land Speed List
Subject: Re: Tach
Jim,
I tried to run digital guages with a mag on one engine in the car and an
electronic ignition on the second engine but when the first engine was
running (mag) the mag rendered all the electronic stuff useless. Like when
the "electronic" engine fired it would run rough and erratically. The
guages would be inaccurate and then quit. Changed the mag to electronic
ignition and everything (engines and guages) worked fine.
Learned my lesson there!
Skip
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