Don Kerr wrote:
>
> 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!
>
And to continue........Rod bearing failure is not an instant
phonomena,Nor does it occur due to one instant of oil starvation.The
proccess is not so simplistic, dozens of factors have intercorrelative
effect on the
complete process .HEAT,LOAD.SPEED.SHEAR STRENGTH.AREA.METERIAL TYPE AND
COMPOSITION.HISTORIC FACTORING.
COMPESSERBILITY.COMPONENT INTEGRITY.GROOVE OR UNGROOVED. ....etc etc etc
etc. ANYONE?
Anyone ever bricked an old engine? DK DKV Euro.
> 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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