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Great work. I have also been wondering if the oil pump plate is flexing around the oil pump and opening up the pump clearances causing lower pressure . Most oil pumps have a steel backing plate or they bolt to the block or both. Another thing I have been thinking about is the expansion of aluminum compared to the steel oil pump gear.
What is your oil tempature? I have 83lbs at 7500, tempature 200f. That is with vr1 20w 50 conventional oil. Have not tried redline yet. Was also thinking of using BMWs fix for spun bearings 10w 60 tws. Great work and thanks so much for sharing.
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