what to gap my tr55 at ???
01-26-2006, 04:18 PM
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I'd go with the .055....as long as you don't go so large as to weaken the spark (jumping too big of a gap), more gap means more exposure to the air/fuel mixture.
01-26-2006, 05:22 PM
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Factory recommended gap for the LS1 cars is .060". Every pack of TR55s I've ever bought have come gapped at .059". After trying a few gaps in the .050-.060" range, I've settled on .055". 
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01-27-2006, 05:20 PM
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I would leave them at the .055 gap. Run the car for a week or 2 and pull a couple to see what they looked like. Mine were running too hot, so I switched to TR6 plugs.
