found out.
Spun a bearing.
He had been doing burnouts w/o rev limiter
did the run with spun bearing, heat welded the rod to the crank and boom!
yep not pretty.
How do you know you have spun a bearing before you grenade an engine? theis one is loud, so listening is not the option
he claims oil pressure at 90 psi when it occured.
would hold true if the bearing swung over the top hole and blocked it.