GTR Fever Posted June 9, 2015 Share Posted June 9, 2015 Good day everyone, Took the time weekend to change the coil pack jacks as there were brittle and damaged. While there I decided to look at the condition of the plugs. Last mechanic did a spark plug change before I started doing them myself and he installed NGK BKR8EIX plugs. Is this suitable for my application or should I run range 7 instead? Car is a J-spec TT auto with: Aeromotive fuel pump 3" thick front mount intercooler with piping 3.25" exhaust with restrictor ring to 1.1 bar Greddy intake system HKS FCD set to 9 Thanks in advance. Cheers, Chris. Quote Link to comment Share on other sites More sharing options...
Dim Sum Posted June 9, 2015 Share Posted June 9, 2015 http://www.mkivsupra.net/vbb/showthread.php?41927-FAQ-Spark-plugs Have a read, this thread tells you everything you need to know and more Quote Link to comment Share on other sites More sharing options...
safcdixon Posted June 9, 2015 Share Posted June 9, 2015 8's are defintley better imo, I ran 7s in mine for a couple of years but went through a few sets in that time with not alot of miles , switched to 8s about two years back they are still going strong on the same set and i do alot more miles now than i did back then. Quote Link to comment Share on other sites More sharing options...
Lee P Posted June 9, 2015 Share Posted June 9, 2015 7s or 8s will be fine We usually run the 7s with BPU Quote Link to comment Share on other sites More sharing options...
GTR Fever Posted June 10, 2015 Author Share Posted June 10, 2015 Thanks guys for the responses. I know most people usually run 7's with BPU which is why I was confused. But thanks again. Car has no misfire on boost or anything so I will leave it as-is. Quote Link to comment Share on other sites More sharing options...
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