Today I just picked up some NGk BKR7E's and I was curious as to what gap I should use with these for my 2.9" pulley setup, thanks.

 

.35 should be perfect!

 

Are the plugs I got good enough for the 2.9" pulley they are only 1 step colder....for some reason I was going off of cobalt addictions website and it said .40 but I figured people with expierence would know better, thank you though + rep

 

Anywhere in between .035-.040" will be ok. Yes the plugs are good.

 

yeah I got mine at .040"

 

I will go with .40 most likely..question will the car run alot smoother with these plugs over the stock ones?

 

.040

 

how bout for a 2.8?

 

Same gap.

 

.40?

 

When I had the 2.8 and the NGK's that's where my gap was and it was fine.

Always use the biggest gap possible and work downwards. If you find .040 not working then try say .037"...and so on till you find what works best for your setup.

 

will these plugs make the car run smoother?

 

haha idk how to tell wat works best

 

If the plugs you have in there now are bad, then yes.

 

u think the new plugs will also make my idle stay at a certain spot? becuase all it does is jump everywhere!!!

 

Thanks for all the help guys, going to be putting the plugs in tomorrow....needed to get them in before I leave to the track tomorrow.

BTW out of the box what are these spark plugs pre gapped?

 

Got the plugs in it runs much smoother overall throughout the whole power band, I am very impressed. Went with a .040 gap as well.