ok so i am running 1 step colder right now. i have a 2.7 pulley, 60s, fmhe, dual pass, and meth spaying 7gph and 75% meth 25% water.
i am going to do a oil and trans fluid change in a few day and i am going to do plugs at the same time should i switch to 2 step colder.

 

Keep the 1 step colder.

 

when do you think 2 step would be needed
i wish i knew my cylinder temps

 

I don't know if the iridiums are really going to be of any benefit. I used to swear up and down by em. Even on the TVS.

But I was having some weird missing issues and a funky idle. Even after adjusted gaps, tuning and all that.

So I swapped to the coppers. And the car ran beautiful from then on. Not to mention their cheaper as well. By a lot.

 

1 step should be just fine.