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.
That being said I ran Revo stage 1 and now APR stage 1 and in both cases I've had no issues running the NGK BKR7EIX plugs. I inspect them at a reasonable interval to make sure combustion looks good with them and it appears that they are doing just fine.
21K on my NGK's and no problem. Yes they were plug and play.
Never put those cheap ass Autolite plugs in... With that said, copper NGK plugs (brk6e) are great plugs...I was running the NGK -1 range cooler plugs (bkr7e) until the last GIAC update...and was pleasant pleased with the quality of the plugs...especially for $1.50 a piece!
within the past six months, off the top of my head, i had the following done at tyrolsport : timing belt water pump thermostat oil cooler and housing all new coolant hoses.. thats right.. i did it just cause.. i have the reciepts. valve cover gasket cam tensioner gasket ngk pfr6q's see where this is going?
i felt the same hesitation with my car. i did a scan and got some cylinder misfire faults so i changed my spark plugs to the NGK 1 heat range colder and i havent felt that hesitation since.
I have ran BKR8EIX and i noticed no diff switching to bkr7e.
NGK Iridiums.... Not right for the ABA, and really a waste of money unless you are running a hopped up ignition, anyway.
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