Originally Posted by GizmoJunkie

See i was trying to look up to see if it was what they call "pinging" or pre-detonation. Looked for a video and couldnt find one

I havent had the issue since last year, usually it does it when engine is hot, say above 250. Exception being the first run i had this year. I couldnt get the engine to stay above 200 and it was kinda lean at that. Hasnt done it since.

I have opened the engine up a few times, even recently and havent seen any signs of pre-detonation such as the grainy surfaces.

The noise im talking about usually happens when idling down from a lean top, while the engine is up to temp. Not sure if this was a lean thing or a "ping". I was thinking if i encounter this again id use a colder plug.

If i come across being unable to temp above 200 again would you suggest a hotter plug?

Just a quick edit to add: I feel im fairly competant as far as tuning goes, I always tune to performance but use the temp gun to make sure im in range. It does however get a little hazy on plugs. I know hot weather means use a colder plug, but humid weather means use a hotter plug. What about hot AND humid? Its like guesswork so far and trial/error to see what performs best on those days.