392 stroker oiling problems

spun a couple mains first time. had crank turned an straitened+ line honed. second time i caught quicker. was just starting to eat them. i am thinking starvation but wondering how to fix it second time warmed up really good, checked the filter,was good. ran it around gradually increasing the rpm,s for about 5 minutes, checked the filter, was good. then when i turn up the wick probably 6500 rpms i have metel in the filter. first time all was well till i steped up the rpms but idid not kheck the filter along the way.