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I completely forgot about that damn oil cooler bypass... duh, that was pretty stupid of me! Interesting that you mention the estimated oil pump bypass to be around 100 psi - when I had my pump apart I load tested the springs and calculated the bypass pressure to be ~110 psi at the point where the bypass window becomes exposed. At that time, it didn't make sense to me because you never see that much pressure in a stock setup but now that you mention the oil cooler bypass, it all comes together for me now. So the pump's internal bypass is more of a high-pressure limit safety device and the oil cooler bypass sets the base oil pressure for the engine. But regardless of the placement of the primary bypass mechanism, I still think making the pump more efficient would mean less pressure loss and hence more flow through the oil cooler (rather than at the bearings as I stated before). This additional pressure could be so infinitesimal that it isn't worth debating, but just like you, I'd really like to see some sort of a test and the results.
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