TR6 spark plugs
I bought a set of TR6's. $ in each box. 4 had the screw on tips and 4 had the permanent tips. I put about 500 miles on them and sprayed a 125 shot 3 times. After about a week after spraying I noticed multiple misses. I could tell it was on the drivers side so I pulled those plugs. They were the permanent tipped ones and the porcelin was cracked on all 4 plugs. I changed all of the plugs and went to Autolite 103 and haven't sprayed them yet. I won't put NGK plugs in anythig except my 4 wheeler.
I have had the TR6's in my car for a good 6 months and sprayed on them a full 15lb. bottle. Not a problem at all. Check your spark plug gapping! I also use NGK plugs on my ZX12 (170mph+) and Ive never had a problem out of them either. Maybe you have an issue somewhere else? Dont spray on Platinum plugs or you will cause detonation and damage your motor.
Originally Posted by Sunset'01Z
for me, an occasional shake at idle, and a little choppy acceleration at WOT is running badly. however, i did lose at least .2 in the 1/8th because of this for sure. i ran my car after i did this, and it ran a 9.1 compared to my best time before the TR6's of an 8.8. and yes, i know, i'm not a very good driver lol. my 60' times are 2.3-2.4 ish 
Originally Posted by 2001z
Im guessing your a m6 car lol. You shouldnt be even to tell a loss or a gain off a plug swap. On the cars that are having problems does anyone have a tune ? I have had mine for almost a 1/2 year and sprayed about 40 times and they still look good and i didnt lose any time on my Na runs
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Originally Posted by Christian8A
sounds interesting, dont forget to give us ur feedback about those autolites after spraying 
Allways check the gap no matter what brand or # they are. As far as gapping I got away with gapping them at .040 on the 100 shot on a cam and bolt on car. When I bumped up to the 150 jets it was blowing the spark out over 1,000 psi so I gapped them down to where they were supposed to be at .035
