I take it you dropped a valve and melted a piston? Mechanical over-rev (ie. money shift 5th-2nd, etc.) or from lack of proper maintenance (valve adjustments) on a race motor? Either way, Piston said hello to Valve.
did u have those things modified? not sure about terms but it seems you overdid some mod there and it blew
This thread is amazing. Laughed at a ton of the replies. Looks like you're having fun out there Baal, keep it up!