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Old 05-01-2012, 05:51:47 PM   #1
earnhardtgm3
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Question Spark plug wires routing?

How's everybody routing their spark plug wires.Over the valve covers,under headers or using some sort of guides?Post what you are using and post your engine pics.Need your ideas and thoughts.
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Old 05-01-2012, 06:14:35 PM   #2
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over the valve covers using rubber spark plug wire dividers





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Old 05-01-2012, 07:28:16 PM   #3
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Over with angle plugs

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Old 05-01-2012, 08:26:56 PM   #4
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Old 05-01-2012, 08:48:17 PM   #5
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Old 05-01-2012, 08:56:56 PM   #6
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Old 05-01-2012, 09:01:13 PM   #7
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I like under the headers & up the back.
I also have big tubes on a BBC, so there's plenty of room some of you might not get with a tighter header??

I don't need holders, I attach mine to the computer probes for my EGT's.

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Old 05-01-2012, 09:01:15 PM   #8
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Old 05-01-2012, 09:26:37 PM   #9
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Route them any way you like them except don't use long parallel runs. Parallel runs cause induction cross firing between cylinders.
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Old 05-01-2012, 09:58:33 PM   #10
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+1 on what Gary S said.
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Old 05-02-2012, 01:18:57 AM   #11
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Old 05-02-2012, 02:15:33 AM   #12
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Old 05-02-2012, 02:58:47 AM   #13
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On top, easier to fiddle with.

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Old 05-02-2012, 10:07:12 AM   #14
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Quote:
Originally Posted by Gary S
Route them any way you like them except don't use long parallel runs. Parallel runs cause induction cross firing between cylinders.

I know this is especially a potential problem for cylinders #5 and #7, but how often does this really create issues?

In almost every picture in this thread, the plug wires have long parallel runs. Are there certain conditions that make this more of a concern such as older plug wires, higher power ignitions systems, etc, or is this always a concern regardless?
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Old 05-02-2012, 10:38:27 AM   #15
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Quote:
Originally Posted by jthomas
I know this is especially a potential problem for cylinders #5 and #7, but how often does this really create issues?

In almost every picture in this thread, the plug wires have long parallel runs. Are there certain conditions that make this more of a concern such as older plug wires, higher power ignitions systems, etc, or is this always a concern regardless?

It's one of those things that used to happen more often "back in the day" Generally the wires have to be pretty much laying on one another and have a long parallel run. The better the components get the less often you hear about it. A good set of wires and using separators make it a non issue. It's like the notorious air pocket in the cooling system, it can happen but it's not likely.
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