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Old 04-16-2012, 12:20 PM   #1
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It's about time to replace the spark plug wires on my 2005 dually w/6 spd manual. The obvious benefit is that there's no rats nest of wires running across the intake manifold, but do I have to reprogram the coil timing since the second terminal on the coil is no longer firing a spark plug on the other bank now, and firing one on the same cylinder? I thought the timing for the two plugs was a little off set to begin with for more complete combustion anyways.
And if there's no difference, why didn't Dodge go with the shorties in the first place? I'm confused.

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Old 04-16-2012, 12:20 PM   #2
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It's about time to replace the spark plug wires on my 2005 dually w/6 spd manual. The obvious benefit is that there's no rats nest of wires running across the intake manifold, but do I have to reprogram the coil timing since the second terminal on the coil is no longer firing a spark plug on the other bank now, and firing one on the same cylinder? I thought the timing for the two plugs was a little off set to begin with for more complete combustion anyways.
And if there's no difference, why didn't Dodge go with the shorties in the first place? I'm confused.
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Old 04-16-2012, 04:00 PM   #3
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There is nothing you need to do. When I installed the 6.1 coils on my 03 it took about 30 second and the idle sorted itself out. There has been some reports that engine starting when cold can be difficult and folks using nitrous have had some ignition firing issues. Probably related to the older coils breaking down, but I really don't know.
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Old 04-16-2012, 06:24 PM   #4
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Old 04-16-2012, 06:52 PM   #5
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Yeah, I was thinking about doing the coils later on too, but as far as the shorty wires, you're saying they're plug and play?
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Old 04-16-2012, 07:01 PM   #6
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So how do you like the 6.1 coils any improvement over stock? I was thinking about upgrading to the MSD coils or the Performance Distribution coils which look like they're about $100 less than the MSDs.
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Old 04-16-2012, 09:33 PM   #7
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Shorty's are plug and play. Dodge didn't do it because they are using the waste spark scheme to get by with somewhat weak coils on 2003-2005 models. Lots of discussion on this here if you search for cold start issues. Truck will probably run fine unless you have high compression or very cold start conditions (or Nitrous?). If you want to try some I have a set of Taylor 8mm Spiro Pro Blue wires I was going to sell.

6.1 coils require 2006 and up valve covers and different coil connectors I believe, but will eliminate plug wires. These coils must have higher output than the older ones. As I recall, this kit costs about the same as MSD coils, $450 I think.

You could piece it together using the Performance Distributors coils, a set of newer oem valve covers and a set of the connectors.

Good luck!
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Old 04-17-2012, 05:30 AM   #8
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Yes, a full conversion requires the newer valve covers, 6.1 coils and connectors. These can usually be found at a pick and pull for around $150-$200. They even com up on the classifieds on various forums for around that amount. IMO, I think it's a good upgrade.
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Old 06-09-2016, 08:41 PM   #9
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Lightbulb What are the gains or advantages to 5.7-6.1 ignition mod?

I understand this gives it more power in the sense of currency and less resistance.; what I'm curious about is how this translates into performance? Does it increase performance? If so, how? Does it simply minimize failure by maintaining the desired effect at the desired level (stock)? And finally, would one use copper Champion or NGK plugs, or could yo get gains from a platinum plug with the added juice?

Thanks in advance for any info you can bestow.
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Old 06-09-2016, 08:45 PM   #10
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This is mainly a cosmetic mod. As for spark plugs I would stay with copper. NGK is what I run but champions are pretty popular among the community too.
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