Con-rods bearings / crankshaft problem ?!?

Has anyone listen or read of this problem?

in our country (and in the italian forum) in 3/4 people have this problem... with standard engine:ban:
 
Lol good advice...... Not...... Seriously never heard of bearings going I suppose it could be a contributing factor to the few we have heard that "let go" not easily diagnosable unless you get a knock or it actualy fails
 
how did it happen?

oil pressure loss?

oil tempreture?

sustained high revs on track?

oil surge on track?
 
I'm working on bearing development in my daily job. I'd say that con rod bearing in your photos has run dry, maybe you're creating too many g's on the track! Baffled sump required?

Even if the bearing finally let go on the city street the damage could have been done earlier, a small scuff could have been made on the bearing surface when running dry or under low pressure which has gradually got worse over time to the point when a lump of aluminium has come loose and been dragged around the bearing leading to the catastrophic failure in the photos.

My experience is mainly in polymer bearings but that's the advise I'd give based on my limited aluminium bearing test work.