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

What plugs should I run for a 9:1 383 with 15lbs of boost?

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Old 05-15-2014, 11:53 AM
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Default What plugs should I run for a 9:1 383 with 15lbs of boost?

I'm running denso iridiums now. They're a bit old (about -8 years) and I was going to swap in a fresh set unless there's something better out there for my setup. I'm running ported lt4 heads. I will probably gap them around .030. Is that about what you guys are doing?
Old 05-15-2014, 12:26 PM
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Yep. Mine are gapped 30 and I use NGK BR7EF
Old 05-15-2014, 01:43 PM
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Thanks for the input. Are those pretty foul resistant?
Old 05-15-2014, 02:19 PM
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Originally Posted by qwiketz
Thanks for the input. Are those pretty foul resistant?
depends on the build and the heads, but also the quality of the tune.



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