I will raise my boost to around 13-14 lb , I have the Denso iridium IKH20 , and I´m wondering if this sparks ,will be enough for this boost increase ??????
What kind of spark plugs are you using for this boost pressure?

 

al v-
I run one step colder copper plugs. LFR6A-11 from www.sparkplugs.com.

 

Mine are 1 step colder too, but maybe need, 2 steps colder............

 

al v,
I used copper plugs after reading a lengthy post about copper cooling faster than platinum or iridium. I didn't want the "glow-plug" effect and figured I'd be changing them pretty frequently anyway. I've run these all the way up to 17 pounds of boost.

Bruce

 

if you run copper plugs keep in mind they foul much, much faster than iridium or platinum and therefore with boost should be changed every 3 months or less.

The iridiums 1 step colder are perfectly safe to run. Copper is old technology that isn't as beneficial as the better iridiums.

 

Cooper plugs interesting..........but maybe chimmike is right, they foul much.....

 

so are turbochargers.......what's the point?

 

Anyway, I will go with the Denso iridium IKH22 , they are gapped to 0.8 mm from factory.The summer is coming and I need a colder spark plug.
I can´t go with a copper plug , we doesn´t have a very good gas here , like you guys have in the U.S.They will foul much more......

 

My old-fashioned plugs have been in the car since January(about 10,000 miles), and lasted through our "oxygenated" fuel season:-)