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Plug upgrade, correct gaping?

 
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AdamSabz
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2004 Chevrolet Impala


PostPosted: Wed Oct 16, 2013 11:14 am    Post subject:  Plug upgrade, correct gaping? Reply with quote

I've had my autolite 104s in for about 40k miles, my understanding is they are 1 heat range colder, I was thinking of changing them out for NGK TR6's. The TR6's are 2 heat ranges colder, correct?

First question: can I, or better yet, should I? Be running the NGK TR6 with my mods? 04 impala SS, k&n intake, 180* t stat, p-log, 3" catted DP, 2.5" magnaflow cat back, 3.4 pulley, 1.9 yella terra roller rockers, 105# comp springs, in car tune by overkill. I am going to be adding headers in te next few months.

Second question: what gap do you recommend for both the 104s and the TR6's? Ive heard a few different opinions. Whichever one I choose, I would like to have it gapped correctly obviously.
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VictoryRed09
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2009 Chevrolet Impala


PostPosted: Sat Oct 19, 2013 10:15 pm    Post subject:   Reply with quote

Not sure if I would go 2 steps colder for street driving unless your glazing or blistering the Current plugs.

Plug gap should remain the stock gap.
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TeenBeach
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2003 Chevrolet Impala
2002 Kia Rio


PostPosted: Sat Oct 19, 2013 10:48 pm    Post subject:   Reply with quote

Or you could keep that import crap part out of your American made car.. Or Canadian. Whichever is really correct

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98ss
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PostPosted: Sun Oct 20, 2013 10:21 am    Post subject:   Reply with quote

TeenBeach wrote:
Or you could keep that import crap part out of your American made car.. Or Canadian. Whichever is really correct


Yes because the original plugs that came in the car were made by japan (ngk) for American use were not considered import because they had an ac delco stamped on them for your American made car that was acutally made in Canada. Nice dude.
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AdamSabz
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PostPosted: Tue Nov 05, 2013 10:11 pm    Post subject:   Reply with quote

I will be sticking with autolite 104s. However, This is where I'm conflicted.
In the pamphlet that is sent out with every Overkill PCM, he recommends a gap of .045 instead of stock .060

Anyone have any feedback on this? Car runs great now with stock gap, should I narrow it up when I change my plugs out?
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Pitch Black SS
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2004 Chevrolet Impala
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PostPosted: Wed Nov 06, 2013 1:00 pm    Post subject:   Reply with quote

I ran my SS with the 104's and a .045 gap, no issues. I believe they first time I did the plugs I ran a .050 and again, no issues

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AdamSabz
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PostPosted: Wed Nov 06, 2013 2:01 pm    Post subject:   Reply with quote

Thank you. I will run 104s at .050 and see how it goes.
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