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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

just pulled plugs gap to .070

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Old 01-06-2011, 06:50 PM
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Default just pulled plugs gap to .070
yep pulled the plugs on a 383 ngktr55ix iridium and there all gapped to .070 im guessing thats not right.
what would be? stock gap?
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Old 01-06-2011, 07:01 PM
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Stock gap is .050", but you no longer have a stock motor now do you? Figure you should go one heat range colder per 100HP and I'd suggest a .035"-.045" gap.
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Old 01-06-2011, 07:22 PM
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I run the NGK TR55s gapped at .040" and I agree with ^^^^. I have a 383 with 11.2:1 compression.

--Alan
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Old 01-06-2011, 07:37 PM
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.070" is huge! go with these guys suggestions above. they know what there talking about
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