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| The Pub For General Automotive Related Talk |
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23-12-2013, 09:23 AM
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FF.Com.Au Hardcore
Join Date: Feb 2006
Posts: 721
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Was reading that gauge oil pressure has nothing to do with the Hydrodynamic oil pressure in your bearings
 Will try and post the article , not good with that  Eg , you might read 50 PSI on your gauge But the hydrodynamic oil pressure in your bearings is actually in the 1000 's of PSI , and can be determined by a test setup exactly how many 1000's of PSI Good Holidays 
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23-12-2013, 01:22 PM
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FF.Com.Au Hardcore
Join Date: Jan 2005
Location: Brisvagas
Posts: 2,547
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Oil pressure is just the pressure the oil pump is producing to provide oil to the bearings. It gives an indication to the condition of the bearing clearances as well.
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23-12-2013, 05:19 PM
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FF.Com.Au Hardcore
Join Date: Mar 2005
Posts: 5,305
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As far as I know the pressure at the bearings is much higher than the guage because the clearance is restricted between the bearing and the journal.....So yes it would likely be around 1000PSI.
Most engine oil pumps are gear pumps and the pressure starts at a base pressure (idle) then goes higher as the revs increase up to a redline 'relief pressure' where the pumps relieves some pressure back into the sump for a very short time then back up high again and so on. |
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23-12-2013, 06:29 PM
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Got Ghia?
Join Date: Jul 2006
Location: Perth
Posts: 999
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Remembering that oil pump's do not pressurise the oil. Oil pressure is formed from the restriction of the oil galleries, bearing clearances, oil filter efficiency etc to the flow of oil.
More restriction = higher pressure.
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2007 BF MKII Ghia V8 - BA GT Exhaust| F6 Intake | Superlows | 19" GT-P's | 30mm Swaybar | - Sold 2002 AU2 XR8 Ute - Manual | Leather | Injected LPG | Pacemakers |
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Oil pressure and bearing oil pressure
Linear Mode
