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What spark plugs????????

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Old Jun 27, 2009 | 04:50 PM
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Default What spark plugs????????

I just completed my 13:1 compression ls3 build. Needs a 1000miles break in and was wondering what spark plugs should I run during the break in time?? It will be ran on race gas ofcourse. Any suggestions guys???? Give me some favorites.
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Old Jun 27, 2009 | 04:56 PM
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I like tr6 NGK plugs I run them in my car it only has 10:1 compression but I spray a 200 shot with those plugs and car runs good on them
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Old Jun 27, 2009 | 05:17 PM
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I was thinking about the TR5's. Not really sure with that kind of compression though. That's really more or less my question.
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Old Jun 27, 2009 | 07:32 PM
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With that much compression your looking at a BPE7 minimum I would think.

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Old Jun 27, 2009 | 09:41 PM
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Originally Posted by Blk99ek
I like tr6 NGK plugs I run them in my car it only has 10:1 compression but I spray a 200 shot with those plugs and car runs good on them

You haven't burned anything up yet? That sure is a pretty hot plug for nitrous.


Originally Posted by 2 fast 2000
I was thinking about the TR5's. Not really sure with that kind of compression though. That's really more or less my question.
That is a real hot plug, with 13:1 you are gonna want to step down a few ranges, like a 7 or 8

Originally Posted by 99blancoSS
With that much compression your looking at a BPE7 minimum I would think.
Agreed, 7 at the mininum, and realistically, probaly an 8
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Old Jun 28, 2009 | 08:57 PM
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I only plan on putting 1000miles on the motor for break in. They will be in there for only that much. Do you guy's think I should return my TR5's and go with a TR6 or 7?
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Old Jun 28, 2009 | 11:43 PM
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The TR5 plug is too hot for that much compression..go colder with a 7 and see what they look like ..
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Old Jun 28, 2009 | 11:52 PM
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no way i would go tr5s... tr6 minimum..
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Old Jun 29, 2009 | 03:25 AM
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Thanks for the help guy's. I'm gonna look into the 6 or 7's.
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Old Jun 29, 2009 | 08:12 AM
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No point in going 6's to start out with, unless you like running risk of detonation. I always err on safe /conservative side, and then add or subtract from there. I would start at 7, get a reading, and go up/down from there.
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