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Mikey · 08-06-2021

Copper is a far better conductor than platinum or iridium. Exotic metals only became a thing when people became too lazy to change spark plugs more often than 100,000 miles. I had issues with the platinum tips blowing off my 383ci LT1 1994 and switched to copper as Pete recommends also. I change them at 10,000 miles. Car runs phenomenal.
I will do the same for my LT5 soon.

08-06-2021	#8
Mikey Join Date: Jul 2020 Location: Nashville TN Posts: 360	Re: Spark plug gap Copper is a far better conductor than platinum or iridium. Exotic metals only became a thing when people became too lazy to change spark plugs more often than 100,000 miles. I had issues with the platinum tips blowing off my 383ci LT1 1994 and switched to copper as Pete recommends also. I change them at 10,000 miles. Car runs phenomenal. I will do the same for my LT5 soon.