OK....Doesn't ANYBODY know ANYTHING about fluid dynamics?Fact: At high
RPM's rod journal oil pressures are in the muli hundreds of PSI.
Fact:Dynamic fluid wedge pressure on main and rod bearings at speed,
around 160000 PSI!
Tony Rhodes wrote:
>
> Message text written by INTERNET:triumphs-owner@autox.team.net
> " As liquids (including oils) are generally considered to be not compressible
> materials, the pressure in the oiling system should be constant throughout
>the system."
>
> Brian, I hate to disagree with you here. Yes, oil is essentially
>incompressible, but
> that does not mean that the oil system must be at the same pressure
>throughout.
>
> Think of your garden hose. Your tap has 20 or 30 psi going to it. Now you
>open it
> part way and let the water flow freely from the open end of the hose. What
>is the
> pressure of the water at the open end? Not much. What is the pressure behind
> the tap? 20 or so psi.
>
> I would agree that BEHIND the flow limiting orifice, the pressure is
>constant. After
> that orifice, the pressure may well be very low.
>
> In my old engine, where is the flow limiting orifice? Ilike to think it is
>the bearnigs, etc.
> But it might be the pressure relief valve!!!! I may have VERY low pressure
>at the bearings!?
>
> Hopefully very soon my engine will indeed have 70 psi all the way to the
>bearings!
>
> -Tony
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