I also tried at 14, but I heard no pinging at idle. So i took it for a drive, made a WOT run, and still didn't hear anything, although at WOT, all I can hear is my exhaust, which sounded much healthier btw. I'm not exactly sure what pinging sounds like, but I don't think I heard it. So I turned the timing back down to 12, because I don't plan on running anything other than 87 octane.
So, i guess my question is would 14 degrees be too much on 87 octane?
BTW...my car feels a LOT better.