I used to run NGK tr55's in my mach1 but for some odd reason they had a tendency to become loose I thought it was my heads but I switched to a brisk plug over 30k ago and haven't looked back I will be buying them for all my cars.
Denso iridium are great for turbo cars
NGK are also good, but in experience denso iridium works better when running more than 1 bar of presseure
installed new plugs and R8 coils today no misfires anymore. this car is f'ing FAST now!
I dunno about coil packs but I put in Denso Iridium plugs a couple months ago and they have been working out just fine...
just did my coil packs and plugs. Used E version Hitachi Made in Japan coils. to my surprise the NGK Laser Cut Platinum plugs PFR6Q came gapped at .028, I was expecting them to be set at .032 from the factory, so it was a simple replacement. No more misfires over 20 psi
Thanks for the all input guys, I kept the Denso IK22's at the stock .032 and they seem to work grrrrrrrrrrrrrrrreat, all my miss firing issues are gone (probably due to faulty old coils) and the old IK22's I had in there were probably looooong in the tooth with around 50k on them. I do notice the smoother idle and the butt dyno feels it seems to be a bit more eager to go from low revs feels so good to not have to 1/2 step on the gas so it doesn't go into high boost and misfire, drove like that for several months:facepalm:
New NGK Spark Plugs
I'd replace them immediately, you'll notice an improvement right away.
yeah ive ran them.... i guess there ok but they foul faster then the iridiums...
I went with some NGK coppers. I dont know the exact part numbers of them but the ones I got were crap lol My MPG went down to 19 mpg.
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