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Hi everyone,
I've been trying to track down my running issues in my 1990 NA. Coil pack connectors came in today from Z1, and I pulled a spark plug to see what kind it was (since the previous owner supposedly replaced them). Found out they were NGK BKR5EGP and asked question (see post HERE). In an older post of mine, another member asked about what plugs I was running, but I did not know then. And from searching around, it seems most people recommend the 6 range NGK plugs. So, I'm thinking it might be a good investment to replace them with correct plugs while I'm getting at the coil pack connectors. I have a few questions:1. Ash's great writeup on the 6P's says this:
"In the stock configured 300ZX(Z32), the NGK (japanese manufactured) platinum tipped plugs are used.
NA stock = PFR6B-11 gapped to 0.044" (1.1mm)
TT stock = PFR5B-11B gapped to 0.044" (1.1mm)
While these plugs perform well under stock configuration, they do not perform well under a modified, high output configuration." and later says this: "To mitigate the posibility of 'spark knock', you should use a spark plug that has a higher ability to dissipate heat. This simply means you need a plug with a higher 'thermal dissipation' number. Here's the breakdown: NA stock: PFR6B-11 ; upgrade to the PFR7B-11
TT stock: PFR5B-11B ; upgrade to the PFR6B-11B" I'm a little confused as to which plug is being recommended, the 6 or 7 range? My car has Borla exhaust and I believe the JWT intake, but besides that is mostly stock I believe (ECU appears OEM, etc.). 2. Z1 says that NGK PFR6B-11 or the NGK PFR6G-11 are the same plug. Is this really true? Seems weird to me that a company would give different part #s to same part. Thanks for any and all input!
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