Quote:
Originally Posted by dsfra
According to AllData, the pressure idiot light doesn't come on till it's <= 4.3 PSI, and at that point IMO it's a little too late. For me, Elvis has already left the building. I recognize that pressure is uniform throughout a closed unrestricted system - I was talking about temperature. I'm not much of a thermodynamicsist, but I think that for temperature it would matter. Limiting case: a really really really really long hose with lots of stagnant oil in it would be real real real slow to have the oil trapped at the dead end warm up and reflect the temperature of the oil flowing by at the "hot" end of the hose.
Anyhow, it's always fun to watch what gauges do under different conditions.
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Synthetic oil. Has a great viscosity index. Won't hardly move a gauge from cold to hot. I understand it's fun to watch gauges but in this case it will go to a pressure.... and stay there. It's not like it will go to a pressure and gradually decline if you are having a problem. It will just drop, just like turning on a light.
Lastly on a really, really long hose scenario:
If we are going to run a really really long hose we run pipe or tubing. Why? Because, even though the fluid is basically incompressible (2% at 5000 psi) the hose will expand enough over its length to act as an accumulator and THEN you will have different pressure readings lol. Short hoses, long pipes. That's the rule.
