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Do-IT-Yourself For all those Do-it-yourself ideas that will save you some bucks

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post #1 of 28 (permalink) Old 01-31-2019, 11:28 AM Thread Starter
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Screamin Eagle Performance Spark plugs

I'm getting ready to change my spark plugs on a 17 RGS, which already has a Stage II torque cam and ventilator air cleaner. HD offers stock plugs for about $5 bucks each and Screamin Eagle Performance plugs for a few dollars more. Does anyone have an opinion on the Screamin Eagle plugs? They say they are designed to go with Stage upgrades. I'm really not concerned about the few bucks more that they cost. I just want to know if they actually make a positive difference.

Thanks,

George

2017 RGS Hard Candy Hot Rod Red Flake
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post #2 of 28 (permalink) Old 01-31-2019, 12:42 PM
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From what I've heard, don't bother. You won't notice it, and neither will your motor.
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post #3 of 28 (permalink) Old 01-31-2019, 01:02 PM
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The thing to consider on plugs is the heat range. Some spark plugs are designed to run hotter and some are designed to run cooler. Sometimes if someone is experiencing detonation or pre-ignition you can select a cooler running spark plug to help get rid of it. For what you have don't worry about spending the extra bucks on the SE plugs and just keep running the stock ones. There is absolutely no benefit you would see out of running the SE plugs.
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post #4 of 28 (permalink) Old 01-31-2019, 01:06 PM
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Like the others said, don't bother. I don't recall if the M8 motors have ion sensing like the twin cams do but I know the SE plugs and wires will mess with it.
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post #5 of 28 (permalink) Old 01-31-2019, 01:13 PM
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I don't recall if the M8 motors have ion sensing like the twin cams do but I know the SE plugs and wires will mess with it.
I think that issue pretty much went away when the CanBus system came into play. I hear it's not as sensitive to the resistance changes as the old J1850 electrical system was. I also know that the ION sensing just had problems in the beginning and I think HD tried to blame it on changing plugs or wires.
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post #6 of 28 (permalink) Old 01-31-2019, 01:19 PM
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Quote:
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Quote:
Originally Posted by BH#103 View Post
I don't recall if the M8 motors have ion sensing like the twin cams do but I know the SE plugs and wires will mess with it.
I think that issue pretty much went away when the CanBus system came into play. I hear it's not as sensitive to the resistance changes as the old J1850 electrical system was. I also know that the ION sensing just had problems in the beginning and I think HD tried to blame it on changing plugs or wires.
Right on Ken, thanks for the info. Seeing the SE spark plug post stirred up that info that I remembered about ion sensing. Those plugs did not work too well in my '07 Softail though. Switched back to stock plugs and the issues went away.
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post #7 of 28 (permalink) Old 01-31-2019, 01:25 PM
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Did I read the cost correctly ?
$5 for Spark Plugs and the Wires for a few dollars more ?

I bought the SE wires in Red for the looks only really and they were $50 at the dealer.


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post #8 of 28 (permalink) Old 01-31-2019, 01:43 PM
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Quote:
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Did I read the cost correctly ?
$5 for Spark Plugs and the Wires for a few dollars more ?

I bought the SE wires in Red for the looks only really and they were $50 at the dealer.
$5 for the standard plug, couple $ more for the SE plug.
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post #9 of 28 (permalink) Old 01-31-2019, 01:59 PM
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$5 for the standard plug, couple $ more for the SE plug.
LOL... I was interpreting the plugs for the wires. .
Dont know why .. brain fart . .


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post #10 of 28 (permalink) Old 01-31-2019, 04:28 PM
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I run the regular plugs in my 110 CVO. No issues here.

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