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Proper Spark plug gap?

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Old 01-29-2008, 04:01 PM
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Default Proper Spark plug gap?
98 LS1
160 Degree thermostat
essentially stock
I've read .035 to .05 What is a good gap for the stock LS1 heat range with TR55 Plugs.

After a third search, I'm seeing a recommended .05 to .055 for a stock engine.

and a .035 for small nitrous shots.

Edit: Mine came in at a .057 gap. I think I'll go with that.
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Old 01-29-2008, 05:19 PM
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I have the NGK TR55 V power plugs in mine gapped at .055 You should be fine.
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Old 01-29-2008, 05:25 PM
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Just double checking. It never hurts to be safe.

(except maybe the first time)
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Old 01-29-2008, 11:10 PM
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If you spray it, use TR6s gapped around .035-.038


You'll be fine with the TR55s with a gap between .050 and .060
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