[AndyG27]

Hi, I have a zex nitrous system and I am running a 100 shot currently and I was wondering if I am running the proper spark plugs. I got ngk tr7's which are 2 steps colder than stock but I think that may be too cold for my setup. I am considering switching to tr6's and running only 1 step colder. So basically my question is if the tr7s are too cold and if they are does it decrease my performance because it seems like they have made my car slower? and what other problems may i run into if they are too cold? Also, I hear its better to run copper plugs over iridium when used with nitrous, is that true?

-Thanks

[LedZepplin77]

Originally Posted by AndyG27

Hi, I have a zex nitrous system and I am running a 100 shot currently and I was wondering if I am running the proper spark plugs. I got ngk tr7's which are 2 steps colder than stock but I think that may be too cold for my setup. I am considering switching to tr6's and running only 1 step colder. So basically my question is if the tr7s are too cold and if they are does it decrease my performance because it seems like they have made my car slower? and what other problems may i run into if they are too cold? Also, I hear its better to run copper plugs over iridium when used with nitrous, is that true?

-Thanks

All I am going to tell is NGK's are for rice buckets, and don't get platinums. Seriously, it does make a difference, NGK's are made for import sh!t, and platiums will melt with the nitrous, that's my advice.

[stlwagon]

One heat range colder should be more than sufficient.