I also think that it is because these motors were NOT designed to handle over 400 hp at the rear wheels for any length of time.Plus alot of them are drag racers WOT to the traps then closed throttle think what is happening to the rods.
I only know of 3 failures due to chips mine being one.From what I have seen it is not a piston problem[preignition or detonation] it is a rod problem the lenght of the rod is so long and these motors are spinning so fast at times something has to give.and it does.I think like Thor01 does on this one if you mod the he11 out of it and over boost it its YOUR own fault.Stan