What plugs do you have in your LS1
04-11-2012, 07:19 PM
#4
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NGK TR5's @ .045, I am only running this small of a gap so I can get away with the lower grade fuel for now. I think most of the newer gm engines are gapped @ .040 for this reason.
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04-11-2012, 07:37 PM
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The TR5 & TR55 are the same plug, same heat range, just come with a different gap out of the box.
I'll find the post about the smaller gaps, GM did it for a reason but can't remember but every application is different, my car is pretty much stock.
I'll find the post about the smaller gaps, GM did it for a reason but can't remember but every application is different, my car is pretty much stock.
