LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

stock LT1.... NGKTR55, TR5, or something else?

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Old 01-07-2005, 11:21 PM
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stock LT1.... NGKTR55, TR5, or something else?

looking at either the ngk tr55 (.050 gap) or the NGK tr5 (.035 gap). of course I'm open to other suggestions. just a bolt on LT1
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Old 01-07-2005, 11:23 PM
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Re: stock LT1.... NGKTR55, TR5, or something else?

ngk tr55 with the 0.050" gap for sure.

That's what I have and it runs very smooth, and my dyno plot was super smooth too, with the NGK's. (you can see the dyno curve if you cllick on it in my sig)

Make sure to gap them by hand to 0.050", since they won't be correct out of the box.

Dan
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