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Years ago I had a 440 with a high pressure pump in it, in cold weather it would peg a 100# gauge at start up. At temperature it ran almost 75# at cruise rpms. The only oil I ever ran in it was Havoline 10-40. After beating on it for five years I rebuilt it and installed a standard pump.

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High pressure and high volume pumps are two entirely different things. I high pressure pump simply has a higher rated relief spring. A high volume pump has a higher displacement volume.

Astrobuf

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You are correct.

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