I will try to give a good idea without being to drawn out. You will get the idea... Here is my understanding.....when excessive amount of raw fuel enters the cylinder it washes down the coat of oil..the heat build up is so great it cannot dissipate fast enough..the ring lands will lift because of heat..taking out oil rings causing oil to enter cylinder causing detonation...( meltdown )..This happens at a accelerated rate when using Nitrous because of amount fuel used thru the carb and fuel selenoids from the Nitrous.. This is very short version.
__________________
Bjuice..
"I'M YOUR HUCKLEBERRY ! "