[Healeys] oil pressure relief valve

[Dave Porter]

Two good answers.. we report, you decide ;~)

frogeye at porterscustom.com


But a pressure pulse will be characterized be the conversion of the static
pressure to a velocity pressure. The orifice retards the passage of the
velocity wave and thus damps the pulse.

Bill Lawrence

>
> Pascal's Law states that any increase in pressure in a closed system of
> incompressible fluid results in an identical increase in pressure at
>>every
> point<< in the fluid.  Thus, the small hole in the fitting has nothing to
do
> with changing the pressure in the system because the pressure will be the
> same at any given moment from the oil pump to the gauge. It does not
> "dampen" pressure pulses.  Pulses are transmitted equally >>everywhere<<
> simultaneously in the closed system.
>
> If all you need to make the gauge work is oil pressure and not oil flow,
> then by Pascal's Law the pressure will transfer through a small hole just
as
> well as through a large one.  However, a small hole in the fitting would
> limit the amount of oil lost through it should the flexible line/hard
> line/gauge spring a leak because it does present a restriction to flow.