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What exact sparkplugs for DART 225 heads on D1SC blower 9:5 LS6 motor?

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Old 06-02-2006, 11:54 AM
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Default What exact sparkplugs for DART 225 heads on D1SC blower 9:5 LS6 motor?

Ordering these DART HEADS 225 cc for my forged 347, 9:5 to 1 compression, being built for the future and I know you have to run a different sparkplug than what is used with stock LS1/6 heads.


My forged LS6 motor will be seeing up to 14lbs on a D1SC Procharger and what exact spark plugs do i need to get, part# ,etc, etc, to be the perfect plug for my blown D1SC 347 LS6 9:5 to 1 compression motor, using the Dart 225 cc heads (and not that it matters, but car is primarly driven on the street 99% of the time at about 10K miles a year.

Thanks for your input!
Old 06-02-2006, 12:44 PM
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NGK TR7 Iridium gapped to .40-.44 would probably be pretty close but I'd suggest calling a tech at NGK and they will tell you exactly what to use.
Old 06-02-2006, 02:53 PM
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Thanks man and does anyone else know the exact NGK part #, etc.!
Old 06-02-2006, 03:21 PM
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Actually do a search in the engine tech section, people are using the same plugs they were using in their stock heads in the darts and thats not right. They actually use a different style plug, I think darts are gasket type plugs whereas stock heads are a tapered plug.HTH
Old 06-02-2006, 03:47 PM
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Originally Posted by TS6
Actually do a search in the engine tech section, people are using the same plugs they were using in their stock heads in the darts and thats not right. They actually use a different style plug, I think darts are gasket type plugs whereas stock heads are a tapered plug.HTH
EXACTLY, that is why i posted b/c i heard the wrong plugs could mess the new DART HEADS up. Hopefully somebody who knows the proper plug type and part # will chime in as my search engine skills are not good!!
Old 06-02-2006, 03:52 PM
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Ive always heard TR6 gapped to about .35 for FI. Cant help you with the Dart question.
Old 06-02-2006, 04:08 PM
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https://ls1tech.com/forums/showthrea...rt+spark+plugs

Read up here.
Old 06-02-2006, 05:05 PM
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TS6 Great thread info, thank you very much!!



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