What heat range plugs should I be using?
#1
Evolving Member
Thread Starter
What heat range plugs should I be using?
Hi. I've had an ongoing misfire/cutout issue for a while now and I've been told it could be because I'm using the wrong plugs, and i was hoping someone could confirm what plugs I should be running. Basically when I bought my IX it had a few usual bolt-ons (intake, manifold back exhaust, standard ebc) with my car remapped to 386bhp and not too long after I bought it I noticed sometimes it kind of misfires or cuts out for a split second when at WOT in 5th or 6th and then carries on as normal. It doesn't happen everytime but if I keep ripping through the gears it will happen. I've stuck in some fresh ilfr7h plugs gapped to the standard .5mm and recently fitted a COP kit thinking maybe the spark was struggling with the 27psi boost (according to torque app) but it's still no better. Someone has told me it could be because I need to upgrade my plugs but I just wanted some confirmation before I buy yet more spark plugs.
Any opinions appreciated
Thanks
Any opinions appreciated
Thanks
#3
Evolving Member
Thread Starter
I'm guessing there's a bit of inches vs millimetre confusion here because .022" is actually .55mm which is basically what I'm running when you say colder would that mean move up to the 8 heat range rather than the 7?
#4
EvoM Guru
iTrader: (12)
Based on your power level and setup I would switch over to Denso Iridium IKH24 (5346) and gap them to .022" These are a step colder plugs that offer great all around performance when running high boost. I had the same issue that you are describing at around the same boost pressure until I switched over to these with a 0.022" gap.
-pal215
-pal215
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#8
Evolved Member
iTrader: (27)
Based on your power level and setup I would switch over to Denso Iridium IKH24 (5346) and gap them to .022" These are a step colder plugs that offer great all around performance when running high boost. I had the same issue that you are describing at around the same boost pressure until I switched over to these with a 0.022" gap.
-pal215
-pal215
#9
Evolving Member
Thread Starter
Hrm, good info there but not what I was hoping to hear obviously. I'm tempted to give the colder plugs a go anyway seeing as pal 235 said it cured a similar problem for him purely because I've got no other ideas, unless youve got some idea as to what it might be?
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