Quote:
Originally Posted by SenorFunkyPants
Thanks for the correction and of course it makes far more sense.
However the proposition remains the same, just need to change two words around.
[....]the highest wear is concentrated at the 12 o'clock position ie in the middle of the top bearing. Simple accelerated wear would show as a more even increase in bearing wear.
So logically this elevated wear at that location would be a function of the vertical load exerted during the power stroke of the engine. So increase the force of the power stroke (by say supercharging) will increase the rate of wear - which appears to be the case. By extension, increase the vertical load during the power stroke through poor combustion should also increase wear to some extent.
I Will go back and edit the earlier posts to account for the change but leave the original here unchanged as reference.
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Have you considered this latest theory points to a bearing clearance design flaw? Since oil film created by proper clearance will prevent direct contact between bearings and journals, this theory of yours relies on direct contact -- hence improper clearance.