I'll have my rebuilt/upgraded turbo on Thu. and am wondering at what point if ever to run all 9's?
Upgraded turbo in sig.

 

If your not already, yes it would be a good idea for you (with your setup) to use all 9s.




Joe

 

yeah, i run all 9's in both my cars...just easier

 

what's the advantage of this?

 

just have some one redrill the threading the plugs for the 7 are not the same as the plugs for the 9's a hundred dollar lesson!

 

9's are a cooler plug, so anything to help our engines stay cooler would benefit. mazda only used the 7's for emission purposes, so i have read and heard.

it seems that people say to use the 9's when you have a TII. supposedly helps hi end power.

i have used 9's all around for the last 2,900 miles and gotta say it feels slightly better.

im just looking for anyway to help my motor run cooler, the 9's if anything will help with detonation and preignition at least by reducing combustion temps.

 

Thanks guys. 9's it is.

 

They should be the same threading. Sure you didn't cross thread?

 

ya if you look at each plug the 7's are a smaller thread than the 9's

 

What plugs are you using?? BR7eq-14 and BR9eq-14, both have 14mm threads

 

How do "colder" spark plugs keep your engine cooler? I thought a colder plug just reached peak efficiency at higher temperature (meaning they take longer to "warm up", which is why they're called colder plugs).