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Originally Posted by SB
(Post 4217948)
Holy Schit !
Everyone else run this high ? I think this would be a good poll. I'd like to see if I run a lot less than everyone else. I could be way off from the norm but never seen any issues. I've never run more than 80psi on anything even under full steam. Mid 7000rpm's even, That was not a boat though. Yikes. Especially those idle pressures. Did I say 'Holy Schit' yet ? |
Originally Posted by SB
(Post 4217948)
Holy Schit !
Everyone else run this high ? I think this would be a good poll. I'd like to see if I run a lot less than everyone else. I could be way off from the norm but never seen any issues. I've never run more than 80psi on anything even under full steam. Mid 7000rpm's even, That was not a boat though. Yikes. Especially those idle pressures. Did I say 'Holy Schit' yet ? |
For what its worth every boat I`ve had the oil pressure dropped quite a bit after a hard run, my current motors set off my 20psi warning lights.
K&N breathers always leaked oil, thought my answer was the baffled Teague breathers , still leave a mess, I currently have socks over em. I tapped my oil fill and ran a line to the flame arrestor that seemed to help quite a bit. If I were to do it all over I`d run overflow tanks. Then again its all a band aid for bad machining and blowby. Your foaming oil is probably the same condensation I get under the valve covers near the front. That`s what I get for buying a heavy old Cig. If it were an awesome Fountain the load on the motors would probably be half and all them problems would be solved. |
Rule of thumb. And mercury racing rule. 10lbs per 1000rpm is all that is needed. Anything else is a problem. Foaming or locked up in the heads. That is the rule. This is for a engine at temp
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Change the spring in your oil pump(s)
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Originally Posted by MILD THUNDER
(Post 4217979)
Mine are 90ish cold at 3000rpm. Once warmed up around 75psi at 3000-WOT.. Hot idle, about 50-55psi. After an extremely hard run, they may dip into the 40's while in gear at idle. Soon as i pull out of gear theyll sit at 50-55psi.
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Originally Posted by Black Baja
(Post 4217987)
HV Pumps?
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Originally Posted by MILD THUNDER
(Post 4217988)
Na, standard pumps shimmed.
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Originally Posted by ICDEDPPL
(Post 4217984)
For what its worth every boat I`ve had the oil pressure dropped quite a bit after a hard run, my current motors set off my 20psi warning lights.
K&N breathers always leaked oil, thought my answer was the baffled Teague breathers , still leave a mess, I currently have socks over em. I tapped my oil fill and ran a line to the flame arrestor that seemed to help quite a bit. If I were to do it all over I`d run overflow tanks. Then again its all a band aid for bad machining and blowby. Your foaming oil is probably the same condensation I get under the valve covers near the front. That`s what I get for buying a heavy old Cig. If it were an awesome Fountain the load on the motors would probably be half and all them problems would be solved. |
OK, I know SB will find a way to bust my balls, (he has a knack for that :evilb:), but I'll toss in my observations with my engine. Admittedly, I'm running a lighter oil than most of you (15W40 currently), and I am running the HV 10778C Melling pump. I usually see around 65 - 70 at idle cold, and around the same at speed. After a hard run it will drop down between 25 - 30 PSI when I pull the throttle back at idle. Blip the throttle and it will immediately jump up to 45 - 50 PSI.
If I was seeing 90 PSI I would be afraid of blowing the cover off of the oil filter! :eek: |
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