Considering that this particular thread (One of many I started) begun in late August, this has been a long time coming. I usually turn stuff around much quicker. I got back to work in early September and the jobsites have all been so far away, I'm pretty tired by the time I get home. I noticed some discoloring on the edges of 2 cylinders at the RH cylinder deck. It looked like carbon buildup or something. It bordered at the cylinder and was about an inch long. In all this search for the cause of detonation, I wonder if it means anything. One of the old head gaskets did have some rough spots at the fire ring. Nothing burned, just sort of textured. Once it is back together, I'll recheck the compression numbers.
