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I don't have a clue, except, maybe the SE oil pump has more flow?
Not an SE pump, but I had a Feuling oil pump on my 07 FLSTF, the gyrator gears were much larger on that compared to the OEM pump. More flow helps to assist cooling.
Higher flow does not necessarily mean cooler engine temps, in some cases the opposite. If the circulation is too fast the oil does not have adequate time to shed heat before it is circulated back from the oil tank to the cylinders.
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