Hi volume oil pump vs standard volume pump

Those both look nice and smooth. Took me while to read the letters on Kroosers'... Champ Pans... of course LOL

Duane said

Now if you want an interesting read, Ryer Morrison says pickups don,t suck at all. He claims the oil is displaced into the pickup by the oil level in the pan. It is forced in or something to that effect. Lol

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I would guess he is saying it is caused by the pressure differential from the pan to the inlet side of gears..... pressure differential is the cause of all flow. Which kinda points how you could test all of these pickups against each other: Have a 'standard' pump working into a fixed flow at a fixed RPM, and measure the pressure drop right at the inlet of the pump.