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you'd probably get a better answer with a quck Google search, but here's a few random comments.
Oil pressure is RPM dependant, so low RPM lugging has less pressure to form an oil "wedge" to protect the bearings. Compounding this is the fact that large throttle opening allow a large air/fuel charge, which means a bigger "explosion" pushing down on the piston, which is transferred to the bearings. The engine is also prevented from revving freely, because it's lacking the mechanical advantage of torque multiplication lower gears provide.
Hey Kurt, any particular roads you recommend? I may be going to Summit pt. WV to watch some racing.
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