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Spark plug gap?

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Old Apr 10, 2005 | 10:51 AM
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Default Spark plug gap?

After reading numerous threads on here, I gapped my pretty much stock car at .035. This was about two months ago with no problems noticed since. Just curious if I am looking at causing any damage with this.
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Old Apr 10, 2005 | 11:07 AM
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What plugs did you install? If they were the TR55s then the gap should be more around .050-.055. The TR6s would be good at .035-.040. Personally I set the gaps on a set of TR55s to .055, and the TR6s to .038, but that's me. Oh yeah, if your not running nitrous, high compression, or forced induction then go with the TR55s
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Old Apr 10, 2005 | 04:54 PM
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They are NGK TR55's. Like I said, I haven't noticed anything bad since I put them in. Just wanted to make sure I wasn't going to hurt anything in the long run.
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Old Apr 10, 2005 | 06:17 PM
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I don't think you will hurt anything. You may be a little short on power and get some incomplete combustion. The Haynes manual calls for a .060 gap. I left the gaps on my TR55s at .055. But you are running the kind of gap I would expect to see for turbo or supercharged applications so the spark doesn't blow out.
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Old Apr 10, 2005 | 06:49 PM
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Don't know if it'll hurt anything, but NGK's website says not to change the gap < or > .008 for best performance for their plugs. I always gap the TR55's to .055. I'd pull them and re-gap, but that's just me.
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Old Apr 10, 2005 | 07:30 PM
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Originally Posted by 2001NBMZ28
Don't know if it'll hurt anything, but NGK's website says not to change the gap < or > .008 for best performance for their plugs. I always gap the TR55's to .055. I'd pull them and re-gap, but that's just me.
Yeah, I heard that about the gap too. He might actually need to pull and replace them so they don't fall apart inside his engine...
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Old Apr 10, 2005 | 07:49 PM
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I gap my TR55's at .054! Gotta go with the recommended gap. Laters!!!!
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Old Apr 10, 2005 | 09:08 PM
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Thanks, I'll be regapping them when I put the LT's in. I don't recall why I gapped them there. Sounded like the right thing to do at the time I guess. Thanks again for all the input.
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Old Apr 10, 2005 | 11:18 PM
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i would regap the plugs only for the performance to see if it will help
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Old Apr 24, 2005 | 10:35 PM
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I think I gapped my tr55's at .060 like the manual said. do you think that will cause a problem?
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Old Apr 24, 2005 | 11:25 PM
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did mine at around .058 USED A MALLET!!! j/k
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Old Apr 25, 2005 | 12:14 AM
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Four months ago, when I was still under warranty, GM did a tune up for me and gapped my plugs at .80?!?!?! Bastards, I now have TR55's and they are gapped at .50.
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