So I went with the ever popular BKR7E plugs gapped at .028\". I bought a spark plug gapper and verified the gap which is a good thing because the BKR7E's come pre-gapped at .033\".
i like the way it runs str8 out of the box b/c ngk says not to gap them
My old GLX didn't like anything but NGK coppers.
i have run the ngk v-power plugs the past couple of years with great results. part number r5671a-9
If you like Bosch plugs, use a 7 heat range. The stock 8 is fine for quick in-town trips at stock <10:1 compression. Older 8v's used 7 with the same combustion chamber and lower compression, with 0.032" gap stock. At 11:1 with a big cam and the same ignition mods, an NGK tech told me to run colder plugs (Bosch 6 equivalent, NGK 7) at 0.035" gap. He sent me a box of NGK race plugs, I gapped them, and my car ran sooooo much nicer. I was using Bosch W7DC and W7DTC (even worse) before.
so right now I'm using ngk bkr7e for a turbo application. i am pretty happy with them.
I would also recommend NGK plugs, they are made in Japan and well worth the money.
I made the switch to NGK over a year ago, and haven't looked back. NGK are all made in Japan, and they're more consistent. Multi-electrode plugs hold too much heat around the center electrode, which increases the probability of detonation. Gapping the plugs is also much tougher to do. The grounds can also hold more garbage and shroud the spark.
Apparently these are good for my race car but might not be good for street application.
BP7ES gapped at .025 aren't doing it.
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