Is it possible to have detonation and not show signs on the plugs?
Since my rebuild, I've been fighting with what seems to be detonation. I also went through a time running stock and realized I've got a vibration/noise coming from the tranny. I went ahead and installed Autolite 764's this morning and the plugs I replaced were the ones I had installed with the new motor. I had about 5K on the plugs and they were perfect. A very slight tannish tint and absolutely no signs of a lean condition. My JMS chip is set to 12* and fuel is 12% richer than stock @ WOT. I was under the impression that the plugs were a tell tale of detonation, but I'm starting to wonder. Now, with the 764's, I've still got it. I'm at a point where I know I need to get on the dyno to see what my A/F is doing. BUT IT'S OH SO HARD NOT TO AT LEAST BUMP THE BOOST A LITTLE.
Help if you can and any other personal expierence is appreciated.