Mailing List flyrotary@lancaironline.net Message #49473
From: william singer <billsinger@cvalley.net>
Subject: Re: [FlyRotary] Spiral core wires
Date: Sun, 20 Dec 2009 13:04:48 -0600
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Hi,
 
I am not an expert, but many years ago I was taught to only ground a shield at one end.
----- Original Message -----
Sent: Friday, December 18, 2009 6:07 PM
Subject: [FlyRotary] Spiral core wires

I have 8mm spiro pro blue silicon plug wires from my Jeff rose elec ignition setup which isn't being used.  I will be using  a msd-6a ig plus 2 Chrysler igs for trailing.  can I run these wires?  I will have to cut them to length and put one end on [other already installed].  do the different powered ignitions need different wires?    kevin    [I'll bet Lynn knows the answer!]
 
If those are inductive spiral monel wires, then they are required for the MSD to keep the electronics alive, and on the stock amplifiers probably won't hurt a thing, as those were run with the ghastly carbon dust wires.
 
Also needed if you want to hear anything on the radios.
 
Keep the MSD powered wires dressed away from ground and secondary wires for the trailing plugs. The excess energy can burn through even fat silicone wires.
 
I love my MSDs.
 
The MSD will fire the coil(s) once when you turn it on, and once when you turn it off.
 
This is not your Fathers ignition system.  (The Kettering field collapse system)
 
One day I was warming the race car and decided to tension the oil pump belt at the same time.
 
The last thing I remebered was a 2 inch bright blue arc leaving the back end of a silicone plug boot and lighting up my Timex with the Twistoflex band.  If you look real close you can see that Twistoflex imprint on my wrist today.
 
If you have any Stents anywhere or a Pacemaker. Never get near a MSD. Those things can leave you sitting on the ground trying to remember your name.  Hire a person who is already a bit on the dull side to move wires around for you.
 
The MSD puts 450 to 500 volts into the coil primary winding. Not 12 volts. So, don't get between the MSD and the coil either.
 
The MSD consumes one amp per thousand RPM. Some coils will not survive the MSD. There is a list of suitable coils on the MSD web page. Coils with internal resistors have amazingly short lives.
 
On the other hand the MSD will light the spark plug, not matter what.
 
I run my sensor wires (Crank trigger distributor pick up wires or whatever you might use) through dash 4 Teflon lined braided stainless hose with the braid grounded at each end. This keeps noise out of the trigger circuit, and helps prevent cross fire. Keep primary wires away from secondary wires.
 
Never touch a secondary wire if the engine is running or the ignition system is powered up.
 
Never power up or shut down the MSD with no spark plugs hooked to the coil wires and grounded. It can destroy itself that way.
 
I love My MSD-6ALs.
 
Lynn E. Hanover
 
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