I have heard of a lot of guys adding flow
restrictions on pump inlet, not aware they are increasing pressure drop.
Particularly true with fuel systems.
-al wick
My pump outlet has a 5/8" hole restrictor on the outlet. Same two water
pumps for 9 years. Shifting at 9,600 RPM. No cavitation damage at all.
Generally the radiator(s) will be enough restriction to keep the pump well
below its top flow rate, and lowest inlet pressure. If there is little or no
restriction on the outlet side, the pump might cavitate momentarily
during acceleration.
More likely with lower total system pressure, and low restriction. Less
likely with an accumulator system and more restriction,and higher system
pressure. Less likely with low system volume. More likely with high
system volume. With just a bit of anti freeze and its anti foaming agents,
very unlikely. More likely when air remains in the system. The pumps are
mounted high on the block, and will not pump at all with a bit of air sitting
in them. It is critical that the pump be submerged prior to start up.
Lynn E. Hanover
Lynn,
Just to clarify! - Is that with standard pulley sizes?
George ( down under)
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