TwinTurbo.NET: Nissan 300ZX forum - Question concerning OEM vs "colder" plugs
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Subject Question concerning OEM vs "colder" plugs
     
Posted by LJZTT on December 20, 2009 at 7:25 PM
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Message I am really learning a lot of lessons here concerning departing the safe waters of stage 3-ish for more power. Yikes what a headache this can be.

Ok so I read up about the sparkplugs, heat ranges, etc in search, and I gather that the NGK PFR6B-11B is what I should be using in my TT at 1bar of boost. My question is, what is the result of using the stock plugs at this boost level? Meaning what can I expect to experience symptom-wise?

I ask because I do not know what plugs are in it right now, and when I test drove the car last night I noticed a sort of hesitation/cut-out/powerloss/stumbling once the boost levels approached 14psi.


Also, assuming I do need to change plugs, why shouldn't I use the "7" heat range plugs recommended by Specialty Z?
[ http://www.specialtyz.com/engine_sparkplugs.htm ]

click for photos by SnowmanZ

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