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Eco spark plug gap

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Old 09-13-2012, 09:24 AM
  #201  
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Originally Posted by LocDown
Well, I currently have Gotts mod, 4" heartthrob with magnaflow muffler, and 5* 91oct perf/tow tune. Airraid CAI sitting on the floor. ..just checking the difference between intake air temps between the two.
A little off topic, but I gotta ask...

Just noticed you said had Gotts mod on your ecoboost. Have you noticed anything with it good or bad? I was thinking of doing this as I am not willing to spend bookoo bucks on an intake, but I'm looking for better flow. Thanks.
Old 09-13-2012, 09:43 AM
  #202  
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So far the differences i can tell right off hand are:
The gotts mod will keep the intake temps closer to outside temp but will heat soak faster after turning the engine off. It also seems to give me more audible turbo whistle but i will have to put the cai back on to see if there was a difference.

This comparison was with the cai with snorkel on and the stock box with snorkel off
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Old 09-13-2012, 10:49 AM
  #203  
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changed gap lastnight. 2011 eco. most of them were around .40 brought it down to .35 using the MPT 93 Street Tune.
Old 09-13-2012, 05:42 PM
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NGK LTR6IX-11 is the plug that should be used. This is already one step colder (as spec'd by Ford) than the ideal plug heat range to prevent fouling. The LTR7IX-11 (colder plugs) will still work, just be aware that unless you run your truck hard or have serious modifications done you will be more likely to have carbon buildup on the plugs and thus a return of the original symptoms.

If your truck has a lot of condensation happening in the intake, stay away from colder plugs!
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Old 09-13-2012, 06:11 PM
  #205  
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Originally Posted by VoiceOfReason
NGK LTR6IX-11 is the plug that should be used. This is already one step colder (as spec'd by Ford) than the ideal plug heat range to prevent fouling. The LTR7IX-11 (colder plugs) will still work, just be aware that unless you run your truck hard or have serious modifications done you will be more likely to have carbon buildup on the plugs and thus a return of the original symptoms.

If your truck has a lot of condensation happening in the intake, stay away from colder plugs!
This is a great point if it factual.
Old 09-13-2012, 06:34 PM
  #206  
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For me after changing spark plug for 6510 ngk put the gap at .30 and i can feel the difference truck are more smooth and with
The 91 perf tow 5 star tune it s really better .will see o gaz soon but i dont think it s gonnna be better o that point.
Old 09-13-2012, 07:30 PM
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Well I took a 125 mile trip on hilly roads going to our camp site for the weekend, and having my plugs gapped to the correct .035 had zero effect on the way it ran, the up hill shudder, or fuel economy.
Old 09-14-2012, 08:40 AM
  #208  
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Here is what I pulled out last night (stock plugs 33k miles)
Attached Thumbnails Eco spark plug gap-img_0185.jpg  
Old 09-14-2012, 12:36 PM
  #209  
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Just gapped mine. All were between .030 and .034. Set em all at .034. Fairly easy job.

Interesting thing, the driver side bank plugs were awfully black and carboned up where as the passenger side plugs looked fairly good. The driver side plugs were also all at .030 or smaller factory and the passenger side were all at .034.

Idles the same. Won't be driving it until this evening when I go to the bar.
Old 09-14-2012, 12:42 PM
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Originally Posted by TheRevJosh
Well I took a 125 mile trip on hilly roads going to our camp site for the weekend, and having my plugs gapped to the correct .035 had zero effect on the way it ran, the up hill shudder, or fuel economy.
I didn't expect it too. It's just some more rumor crap that gets started on the internet. So how many have needlessly changes their plugs or gaps with no noticeable results? most of them.


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