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Old 03-07-2013, 07:21 AM   #1
badazz2010focus
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who here is succesfully running al 103's?

I need to change my plugs and I want to go to 103's again what are you guys running your gaps at for best performance?


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Old 03-07-2013, 08:33 AM   #2
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I run them in my boosted 09. Gapped at .028" and change every other oil change.
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Old 03-07-2013, 08:39 AM   #3
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Yeah but that's boosted lol .28 that's one small gap any guys who Are running them in an na application?
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Old 03-07-2013, 09:11 AM   #4
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Just stating...you asked and I told. Throw a set in, with the gap at .045-.050" You won't notice much of a difference.
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Old 03-07-2013, 11:08 AM   #5
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I'm running .050 right now
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Old 03-07-2013, 11:09 AM   #6
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Quote:
Originally Posted by beansfocus View Post
Just stating...you asked and I told. Throw a set in, with the gap at .045-.050" You won't notice much of a difference.
I also dont think the OP will notice much of a difference vs 103 or 104. Ive ran 103's and gapped them to .045-.050. I just run the standard AutoLight copper 104's, realized there wasnt much point for me to go one step colder with bolt ons
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Old 03-08-2013, 06:00 AM   #7
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I am running 103's gapped at .050. noticed maybe a bit more pep and a smoother idle over the stock plugs for sure.
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Old 03-08-2013, 08:43 AM   #8
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Originally Posted by #1fordfan View Post
I am running 103's gapped at .050. noticed maybe a bit more pep and a smoother idle over the stock plugs for sure.
Same here.
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Old 03-08-2013, 09:19 AM   #9
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I have the AR 103's gapped at .050
Works just fine.
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Old 03-08-2013, 09:08 PM   #10
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I was the one who originally got the idea going after reading it somewhere else, best efficiency from coldest plug without fouling.

I run A103s gapped at .055". I change every 20-30k.

Someone did a dyno and going from a factory gap 104 to a wide gap 103 did make 5 horse power.
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