Reply to "Oil Pressure??.. What say you??..."

...I have had the drive pin shear on the Distributor because it was a cheap roll pin that was harded as hard as Glass! I replaced it with a Higher Quality Pin and added another pin through it's center. No Problems as yet. Here is a short lesson for you guys on the Physics of Hydraulics!! There is NO such thing as A High Pressure Pump!! Because the Pump Does NOT produce PRESSURE! It only Produces a FLOW of Fluid!! 'They' are a HIGH FLOW Pump! The Pressure comes from the 'Resistance to Flow'! Hence, The tighter the Bearings(and other componants)...(Including but Not limited to the FRICTION of the Oil to the Walls, Bends, Fittings, Etc. of the System 'Conduits'(Hoses,Tubes))...the Higher the reading of the Pressure Gauge! The more worn the Bearings (and other), The Lower the Readings. So, the Pressure Gauge Reading is NO indication of the Efficiency of a Pump; You need a 'Flow Gauge' For that! In My case; I have ALL of the Pumped Oil Flowing 6 Feet (-10 Size), to the rear or the Pantera, to a Double Oil Filter and a Oil Cooler (Mounted at the Rear Screen) with an Electric Fan that comes on when I hit the Switch, that use to be used for the A/C Fan(Now Removed Forever). Then the Oil Flows back 6 Feet, in -10 (.5" I.D.) Size Stainless Hose to the Block, to the Adaptor where the 'Original' Filter use to mount. My Digital Oil Pressure Gauge 'Sender' is Mounted in the Original Position at the Rear of the Block ALONG with a Size -8 Stainless Hose going to the Port in the Block near the Fuel Pump(Known to You as a 'By-Pass'! There is NO Starvation of Oil over this 12 Feet of Hose because The Entire Length is FILLED with the Oil and the Force is TransMitted 'Continuously' along it's Entire Length!! Which Happens to be the Definition of the term Hydraulics! Now, I have installed the 'Melling High Volume(Flow)' Pump; I run Valvoline VR-1 Racing oil 20W-50 (Because it has the ZDDP additive). At Start-Up, Idleing, I get 51 PSIG, when Hot I have 49 PSIG at Idle. Cruising I see 53. At Higher RPM I see 53 (havn't really been over 4000 RPM with this gauge as yet). High Pressure is Not as Important as the Flow! Because it is the FLOW of oil the Removes the Heat and Debis and 'Allows for Fresh Oil to Enter!! 30 PSI is Plenty to provide a 'Full Flow Film' to prevent 'Metal to Metal contact', at which point this is known as 'Boundry Film'(when the 'High' points on the surface of the Metal First Make Contact)! Your answer is: A heavier 'Bypass' Spring in Your Oil Pump Does NOT increase the Pressure!! It RAISES the Maximum Pressure that must be attained in order for the By-Pass Valve to 'Crack Open'! The Increase in Pressure comes from and Increase in the Restriction to Flow;such as a Clogged Filter. OR at a Higher RPM the FLOW will be increased. And at a Given Restriction this would Result in a Higher Pressure reading of the Gauge. The increase of Pressure does NOT come from the Pump itself!! Higher RPM equates TO Higher GPM (Gallon Per Minute). Higher Flow at A given Ristriction will determine the PRESSURE! The Higher reading on Your Gauge is a Result of the Total 'Resistance' to that INCREASED Flow!!! Period!!
I am up at Delta College finishing another 'Machinist' Degree, now completing the Final Class, which just so happens to be 'Industrial Hydraulics'. Out of 24 Students I am Number One in the Class! So take it for what it's worth! All the best! Marlin...