# ngk iridium locally? **URL:** \ **Category:** Canada Nissan Automotive\ **Created:** [August 26, 2006, 9:35am UTC](https://forums.speedlife.net/t/ngk-iridium-locally/143960 "2006-08-26T09:35:02Z")\ **Posts on this page:** 4\ **Page:** 2
**Author:** ![reeskm](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/reeskm/32/5819_2.png) [@reeskm](https://forums.speedlife.net/u/reeskm)\ **Post date:** [August 31, 2006, 9:35pm UTC](https://forums.speedlife.net/t/ngk-iridium-locally/143960/21 "2006-08-31T21:35:45Z")
> [@pigbenis](#): > > reeskm hows your car running? i just picke dup some 6s but on my last sr i put in 7s. just want to be sure before i put them in. My car is running OK. I have some other problem with my car where it sometimes stumbles and it is running very rich. I think I have carbon build up, need to replace the O2 sensor, or have some other issue. Boost leak may be a problem too. My plugs did make my car run significantly better. I say go with them - I’m having other problems with my motor. My timing is significantly retarded from factory specs – someone in Japan did this on purpose. I had my shop at lunch today set it to factory timing and try and re-adjust the idle and my car was running very badly. I don’t think my problem is realted to plugs at all. Mechanic said it could be a) valve problem or carbon buildup (because of pinging and weird valve noises) or else a bottom end connecting rod bearing problem. I’m really scared now. 😢 Again, from everything I heard, 6 heat range plugs are great for a stock car. If you know that in the next 50-80,000 kms you will be putting on a bigger turbo or increasing your HP more than 20-30%, go with the ultra cold plugs at 7. Just remember, that if you have a near stock car 7 plugs may actually run very badly for you. Then again, they may run better. Factory plugs that I pulled from my car were heat range 6, so I stuck with it. Lastly, my local Can Tire and Partsource don’t stock range 7 plugs – I have to special order them. So unless you really need them, I’d stick with 6. And if you want to save money or have a bit of fun experimenting, there is nothing wrong with going with a lower grade plug. Apparently though, you should only use platinums in this car. I hear that copper is a problem for some reason, but I have no idea. I wouldn’t leave coppers in there for too long – copper has a very low melting point compared to platinum or iridium type plugs - and detonation kills copper plugs much faster than normal. I say, stock cars should keep using 6’s and more heavily boosted cars should switch to 7’s. ---
**Author:** ![pigbenis](https://avatars.discourse-cdn.com/v4/letter/p/e480ec/32.png) [@pigbenis](https://forums.speedlife.net/u/pigbenis)\ **Post date:** [August 31, 2006, 11:05pm UTC](https://forums.speedlife.net/t/ngk-iridium-locally/143960/22 "2006-08-31T23:05:06Z")
Yeah I dont plan on raising boost at all or doing much work. The car has put me pretty deep in the pockets for the few things I purchased. Thanks for the information, definetly a really informative thread. ---
**Author:** ![TyPhOOn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/typhoon/32/5800_2.png) [@TyPhOOn](https://forums.speedlife.net/u/TyPhOOn)\ **Post date:** [September 1, 2006, 7:37am UTC](https://forums.speedlife.net/t/ngk-iridium-locally/143960/23 "2006-09-01T07:37:08Z")
7 or 8 … crank it up … gap it properly as well … ---
**Author:** ![RS13](https://avatars.discourse-cdn.com/v4/letter/r/46a35a/32.png) [@RS13](https://forums.speedlife.net/u/RS13)\ **Post date:** [September 1, 2006, 8:51am UTC](https://forums.speedlife.net/t/ngk-iridium-locally/143960/24 "2006-09-01T08:51:18Z")
you know NGK will make an 11 heat range. So 7 is really not that cold. 6 for stock 7 for small upgrades (GT 28xx turbo’s 8 for crazy [Previous page](https://forums.speedlife.net/t/ngk-iridium-locally/143960.md?page=1)