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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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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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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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Not correct. A high volume pump has more displacement and a higher bypass pressure. http://www.melling.com/Aftermarket/Tech-Tip-Videos

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I've never seen a HV pump that didn't have the black high pressure spring.

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If a standard volume pump can get you adequate hot running oil pressure (eg 55-60 psi for a hot street engine) and adequate hot idle oil pressure (I like at least 20 psi) that's the way to go. Bigger rotors just push more oil past the bypass, use power and generate heat.

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& 75 psi in a system will flow more than 60 psi will no matter what pump is generating the pressure. 75 is high but not a dealbreaker. I'd work on the spring & lower it.

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... and around 70# at 2000 while hot.

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I rarely take it over 5K but at those revs and hot it pushes about 55-60#.

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My 440 makes about 90# of oil press at 1000 RPM cold and around 70# at 2000 while hot. Is this abnormal or anything I should try and rectify?

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smokey yunick put it best . you need 10 lbs of oil pressure per 1,000 rpm. if your engine will see 9,000 rpms , then it will benefit from 90 lbs of oil pressure . with the tight clearance in todays engines, coupled with the advancement of synthetic oils, 15-20 lbs hot @ idol with 65 lbs maximum is the standard for most street strip engines. many older engines with less quality machine tolerances will need the heavy weight oils to keep pressures up when hot. remember this... an engine which is on oil by-pass is not filtering the oil...get your pressure corrected and you will solve all issues.