what type of spark plugs are best to run with a turbo kit runnin about 8-10 psi?

ive heard bout stock srt4 plugs or some type of copper. but recently ive been hearin iridium. please some help?


heres the link for the turbo if u need that to recommend better
http://www.innovativeturbo.com/pages/cart_itemDetails.asp?sku=SH57


and im possibly thinkin of a dry nitrous setup after the turbo is on.... consider that too if it makes a difference. thanks

You better have a good way to control fuel if you're utilizing 2 power adders like nitrous on top of forced induction...

Look into NGK plugs. They make 1 step colder plugs for J-bodies.


www.kronosperformance.com / 732-742-8837

denso makes 4 steps i used 2 steps cooler with nos and turbo and supercharged

Copper is probably best, because they have large electrodes. We found that the platinum plugs don't work well with boost, particularly nitrous, because their electrodes are so small they get really hot. The large copper electrodes help conduct heat away from the tip. Also, several platinum plugs (various brands) have had the little platinum button knocked off the plug, probably from detonation. rattled around in the cylinder and scored the walls pretty bad. The only downside to copper is having to change your plugs every 10-20,000 miles. Of course, unlike a V8, you don't need to go in through the wheel well with three ratchet extensions and a u-joint on your socket wrench, either, so this might not be such a pain as it is on the V8s.