So Ive picked a plug out to run with the car 1 stage colder and copper I know the basics of spark plugs black is too rich, white is too lean and so forth.

I know you cant gap irriduim plugs, coppers dont last, etc

So really what I want to know is how you determine the proper plug gap to run. Stock is .040 but ive been told with the 1 step colder some have problems and closed it to .038.

What "problems" are they talking about and what symptoms do I look for in trying to determine if things are at the right gap

 

subscribed, can never have too much info about this stuff

 

i just run ngk v powers in the lsj with either a .04 or a .035 gap i dont remember which one it is

 

I run NGK Coppers in my 2.2 cobalt, 2 step colder (BKR7E), stock gap, daily driven

They run pretty good.

I need to check them pretty soon though to see how they're holding up

 

either a .04 or a .035 gap i dont remember which one it is

come on man lol thats not helping

 

i would have to pull them to tell you

 

well plugs have arrived, i guess ill go with .040 and see how that works out

 

BKR7Es went in today and now im getting more knock retard than before

im gapped at .040, input is welcome im a bit puzzled if anything there should be less retard

 

You might have to just find the right gap for your car.What works for someone else might not work for you.(Oh,by the way you can gap iridiums)

 

well the stock plugs were at .040 with little or no knock

now i got the 1 stage colder with .040 gap and im getting significantly more knock, which direction do i go?

 

What are your mods?

 

well this is interesting pulled my 20k old stock plugs , they are gapped at .035

guess ill try that with the new plugs

well set the gap to .035 less knock but still more than what i had with the stock plugs err im about ready to just put the old ones back in

 

ok update

got new plugs again in stock plug heat range and same gap as stock only difference is copper instead of platinum and now im getting knock above 13psi WTF this never happened with the stock plugs, Am I getting spark blowout?

This is starting to look like more trouble than its worth using anything other than exact stock plugs