I'll try to answer for him here.
66mm bore STOCK cylinder
br9es plugs, gapped at 18 thou I believe
795 wiseco pistons
dave at noss cut the squish on the experimental domes, and then he used a set of off the shelf 4mil domes with a huge squish clearance, like 55 thou, only 150lbs compression, still detonates.
methanol is the standard crap our fuel companies around here sell to the oilfields.
Only one plug, the left one, over and over. Seems to me like that side has a wierd vibration too, but maybe I'm just seeing things. Could be his crank?