[omg1010]

As said before if the engine output is being stretched (tuning AND often driven at high rev) the crankshaft starts to slightly bend. As a result the conrods tilt against the crankshaft and the lubricating oil film is being squeezed out of the conrod bearings. No lube -> conrod bearings fail ... Increased oil-flow helps to prevent this.

That's the whole secret. Certainly the more the engine is being stretched to the limits the more one has to do to prevent failure.

These informations/findings are not coming from fralind but from user Rika back here in Germany (as Jeff might know).

Brgds
Oliver