well, this is a complicated issue and no one doubts what you saw and we all want to learn new things . . you were also in a situation that the rest of us were not, however to definitively say it was caused by high oil pressure from the oil pump is inaccurate unless you did testing to prove this . . i did engine and chassis and suspension testing for a living when i was a project engineer at a major motorcycle mfg and we were building 165 mph championship winning bikes back n 1986 and we did a lot of oil testing.
one would need to simply use less oil pressure and run the same miles and rpm with the exact same parts as you did then try lower oil pressure to have any comparison . . then they would also have to run a different brand or type of bearing with both oil pressure settings . . they would also have to run all these tests at least twice and achieve similar results both times before any definitive conclusion could be drawn, and the obvious problem is that no one is willing to do this test AND it may be that even if the oil did cause this, the parts that are available today may be different than the ones you used and may not have this problem.
if in fact the oil pressure did cause this in your case, better bearings may not have suffered the same fate, but irregardless, there are simply no examples of bearing wear that are even remotely like what you describe these days, so even if it would still be a problem under the exact same conditions as you describe, no one on any of these forums runs their car for car for 2000 miles at wide open throttle so it is not a problem.
as the crank spins, a wedge of oil is formed, and it is my understanding, although it may not be 110% correct, is that the faster the crank spins, the greater resistance to pressure this wedge has, and this wedge is in the thousands of pounds range, which is far greater than any pressure any oil pump can put out, so if the wedge theory is correct, which every bearing mfg and other expert in the field says, the pressure from the pump is not what was wearing your bearings, it was the extremely high pressure created by the pressure from the oil wedge and this theory sounds a zillion times for plausible than suggesting they wore out from maybe 100 psi of oil pressure.
heres some info on oil wedges/hydrodynamic barrier lubrication but it is not what i was looking for which is in one of my computer files somewhere.
http://kingbearings.com/wp-content/uploads/2014/10/optimization-of-clearance-engine-professional.pdf
Anyway, if you think of it in simple terms. the pressure created by the combustion process is in the thousand lb area . . if you put a flat plate on a press then drill a hole in the center and install a fitting in the hole which will supply 100 psi of oil to it then place a round bar on top of the hole and put 1000 lbs of pressure on the bar, it will squeeze virtually all the oil out and be metal to metal, thus proving within a reasonable degree that the hydrodynamic wedge has a much higher pressure than 100 psi.
something else to consider is bearing wear caused by metals in the oil that came from engine wear, and there definitely was wear on your engine as there is on all engines, and unless you had a bypass type oil system that filtered out 99.9% of ultra fine particles, it seems reasonable to say that at least part of the wear came from contaminated oil but even still, i would think this would be a very small contributor.
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