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Bore Scoring - possible?
From another post I have elsewhere:
Question for pro and well informed diy.
Both Porsche and BMW, a big worry is bore scoring.
Wondering if the search for improved efficiency is partly to blame.
If you could do a experience check in your head - is the scoring you are aware of mostly in automatic transmission cars?
I seem to notice, in the quick shifting to a higher gear, more engine lugging.
Engine lugging to my knowledge, causes higher cylinder pressure, among other issues.
Possibly piston instability?
If you are shifting a manual transmission, at least for me, I tend to bring revs higher than an auto would.
So the meat of the question is:
Does shifting to a higher gear, and incurring engine lugging, contributing to bore scoring?
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