Post and participate in general automotive tech here.
Moderator: Gaskleppie
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danny
- Posts: 23
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by danny »
which spark plugs to use on a 500hp b series... ngk R5671A-8, anyone using these??
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Garrett
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by Garrett »
Non-Projected :R5671-8’s : 4554

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danny
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by danny »
would 9's be ok also...?
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greasemonkee
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by greasemonkee »
I've seen a reduction in long term detonation deposits on plugs with 9's. Other than being a little tough to read, there are no adverse effects IMO.
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Bugermass
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by Bugermass »
I'd run the BKR9EIX . . Or the 5238 The iridium is resistor type so theres less change of issues from IGN noise, but I generally use the 5238.
Chris Delgado Tun'd Performance Houston Texas 713-962-8262