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Old 07-22-2013, 08:44 AM   #1
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Should i gap my spark plugs?

I have some Ngk tr5IX plugs and they are set at 040 I know that the ls1 should be set at 060?
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Old 07-22-2013, 08:50 AM   #2
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Quote:
Originally Posted by legaux88 View Post
I have some Ngk tr5IX plugs and they are set at 040 I know that the ls1 should be set at 060?
They changed the gap to .040 cos car owners were complaining about idle quality. It "was" .060. But if u can get by at .060 it wouldn't hurt.
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Old 07-22-2013, 08:51 AM   #3
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Quote:
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They changed the gap to .040 cos car owners were complaining about idle quality. It "was" .060. But if u can get by at .060 it wouldn't hurt.
Cool ill leave as is
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Old 07-22-2013, 09:28 AM   #4
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Always check / set the gap on new plugs. Always.
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Old 07-22-2013, 09:32 AM   #5
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Always check / set the gap on new plugs. Always.
This .... I bought new plugs for my SS and they were all pre gapped at .040. I did check all 8 just to make sure they were gapped correctly. Just Cos they are suppose to be pre gapped, doesn't mean the gap changed or didn't change during shipping, so Yes, you should always check the gap on plugs.
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Old 07-22-2013, 11:46 AM   #6
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Stock car, gap them at roughly .054"
At least with the TR55.
TR6 will require a tighter gap. Like .042"
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Old 07-22-2013, 12:01 PM   #7
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Quote:
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Stock car, gap them at roughly .054"
At least with the TR55.
TR6 will require a tighter gap. Like .042"
Does the gap effect fuel mileage ? Just wondering if this could be the reason my car went from 29.5mpg's hwy to 27.5mpg's hwy. Maybe the shop gapped them different then they were before the new short block. Or, maybe cos it's a new short block well, was new, have around 49,000 miles On it now. Fuel mileage has improved a little since the miles. Or maybe I just answered my own question.
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Old 07-22-2013, 12:04 PM   #8
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It shouldn't have a 2MPG effect.
I would guess a different motor is the main culprit. It will likely loosen up like you mentioned.
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Old 07-22-2013, 12:08 PM   #9
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Quote:
Originally Posted by Mr. Luos View Post
It shouldn't have a 2MPG effect.
I would guess a different motor is the main culprit. It will likely loosen up like you mentioned.
Ok, being new was what I was thinking, then these plug gap posts got me thinking about that. Cool. It has improved some, but I don't think it's 2mpg's. Haven't really gotten to check it on the hwy. I don't drive hwy miles.
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Old 07-22-2013, 12:18 PM   #10
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Cool deal
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