I like the looks of those plugs I don't see any silver or black dots on the center porcyn, I like the looks and color of the ground strap also Especially after several passes with boost at or above 34 degrees Put two new ones back in it and try lowering the timing back to 34 or less and make another run and post some pictures of those new plugs after those runs
How much boost at the upper RPM ? Are you using boost retard at all? And finally what is the mechanical compression ratio and what fuel are you using I feel your pain as far as rising before sunrise at 5:30 AM to go racing, we both must be crazy The prices we racers pay with such stupid grins on are faces