I am new to the club, and in skimming posts, i keep seeing people say that platinum plugs are bad for the supercharged engine. my car currently has NGK platinum plugs, and i was wondering what the problem that people are talking about with the platinum plugs is, and what i should be looking for to see if my car is experiencing that problem. any comments would be helpful.

Moved to 92-99. Please don't post tune-up or mechanical issues in Performance and Brainstorming.

Platinum or Irridium will be fine for you. Copper is preferred for Supercharged. Stay far away from Bosch plugs, wires, and sensors.

Will, he is supercharged but I think the question is WHY is copper prefered for */C'd?
I searched a little but didn't come up with an answer and you probably have it memorized. LOL

cause platinum has a lower melting point than copper and therefore copper will stay cooler?

The answer is in Techinfo. I missed the SSEi in his signature.

http://www.bonnevilleclub.com/forum/...ighlight=spark

i read that article, it said that platinums are confirmed bad, but what makes them bad, and should i consider changing my plugs asap? the plugs are fairly new, just wondering if they will cause problems if i leave them in or not.
thanks

the nice part about putting in coppers is they are cheap. It'* not a big expense to gain some performance. If the platinums you have in a fairly new, reselll them.

Platinums are bad in a boosted application because they run so hot. The tip almost "glows" in some applications, which is really bad for detonation (something a boosted car already has trouble with.)

alright so what plugs should i get? atleast for a couple months the most modding i will do is an intake and high flow cat/ mufflers.

Every spark removes a little of the platinum. I'd be surprised if they lasted a month. This will cause knock and detonation.

Get them out by the weekend. AC Delco OEM plugs (either copper or irridium, lean towards copper) or NGK. I prefer the NGK V-Power TR55. One heatrange colder than stock (good for any stock SC pulley or one step down), gap at .055", not .060".