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Old Apr 14, 2011 | 02:39 PM
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Default Ngk tr55

I just installed the ngk TR55 copper plug and was wondering how many miles should I expect to get out of them before I change them.
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Old Apr 14, 2011 | 02:42 PM
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It really depends. I assume no spray since you are running TR55s?

For coppers I would do every 20,000 miles or once a year.
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Old Apr 14, 2011 | 02:44 PM
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Awesome, Thanks
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Old Apr 14, 2011 | 11:23 PM
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Dude, I put a fresh set of TR55's in when we installed LT's a few years ago at about 65k. The car just turned over 100k and I thought, "Well, even though it's running perfectly, maybe I should change them." I pulled them out, and one by one, they all looked immaculate. Gap had widened a bit and that was all.

If I get motivated enough I'll take some pics and post 'em. I'm going to leave this set in for 50k as long as the car runs strong.
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Old Apr 15, 2011 | 12:52 AM
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Originally Posted by RevGTO
Dude, I put a fresh set of TR55's in when we installed LT's a few years ago at about 65k. The car just turned over 100k and I thought, "Well, even though it's running perfectly, maybe I should change them." I pulled them out, and one by one, they all looked immaculate. Gap had widened a bit and that was all.

If I get motivated enough I'll take some pics and post 'em. I'm going to leave this set in for 50k as long as the car runs strong.
Thats amazing, your car is in tip top shape
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Old Apr 15, 2011 | 12:56 AM
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I would say for a DD non race car 50k would be fine... Factorys are rated for 100k
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Old Apr 15, 2011 | 03:04 AM
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Originally Posted by RevGTO
Dude, I put a fresh set of TR55's in when we installed LT's a few years ago at about 65k. The car just turned over 100k and I thought, "Well, even though it's running perfectly, maybe I should change them." I pulled them out, and one by one, they all looked immaculate. Gap had widened a bit and that was all.

If I get motivated enough I'll take some pics and post 'em. I'm going to leave this set in for 50k as long as the car runs strong.
I'm going to change out my TR6s for some TR55s and prolly gap them at .050??? What are yours gapped at?
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Old Apr 15, 2011 | 01:20 PM
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They come gapped from the factory at .55 -.58 I just leave them at that, but I check 'em to see if they're all the same. In this particular batch, there was one that was off.
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