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Unread 02-14-2013, 10:20 PM   #1
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1978 CJ7 
Join Date: Aug 2012
Location: cincinnati, ohio
Posts: 57
distributor wiring

Did a LOT of searching and wasn't able to find anything on this topic.

Are there any good 'manuals' on distributor wiring to the plugs? I'm going to be doing the teamrush upgrade (new cap, new wires, new plugs) this weekend on my 304, but I'm by no means an expert on it and could use any guidance available.

Are there any rules on this in terms of wire length, spacing between the wires to ensure no misfire, or anything like that?

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Unread 02-15-2013, 12:11 AM   #2
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1981 CJ7 
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1. You are dealing with high voltage wires possibly including a fibre glass core and carbon so a straight path is better than a curve and a curve is better than a right angle.
2. Insulation works fine but not if next to the exhaust.
3. Wires can run together but the insulation leaks and it will degrade performance though not cause a misfire, keep them seperated with 1/8" air between them whenever possible and support them if needed with plastic connectors / bracket / cable ties to keep them off the valve covers, accelerator cables etc. You can buy the spacers and posts in a good auto store and they keep the cables tidy.
4. They are good conductors but there is no need to make them work too hard so keep them reasonably short whilst allowing them to flow in neat curves.
5. Always terminate them in the manner described by the supplier.

You shouldn't get a misfire unless the insulation is old and cracked and dirty. However they will leak to an extent. These cables pass the current along the surface of the conductor, just under the insulating layer. Any break in the insulation will allow leakage.

What type of ignition leads are you buying?
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Unread 02-15-2013, 07:03 AM   #3
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The wires are the MSD ones that JeepHammer recommended for the TeamRush upgrades.
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