Hot Oil when towing

[Wild one]

I haven't just as an engineer with hydraulics experience, it just doesn't add up that a pump powered system would lose pressure. Pressure is a measure of flow through a restriction. The oil cooler should at worst slow down the pressure ramp, IE when you first hit the gas, the time from idle pressure to "full" pressure takes "x" seconds, the addition of the cooler should make it "x+y", but you should still reach the same pressure after a bit of time. The pump pushes "z" oil/second, upto max pressure. (IE Pressure Washers are rated at PSI with the smallest nozzle they can handle, but the flow rate is with no restriction at all, so you aren't pushing 1.2GPM at 2300PSI, it's more of an either/or)

The cooler probably does create a LOCAL pressure drop in the cooler, but it should still allow the same volume of oil to flow through it in a give time, just internally to the cooler the oil will be slower flowing to give it time to lose some heat, by the cooler using larger tubes than the feed/drain side hoses. (IE the hoses from RAM would be 1/2" (or w/e), and the cooler would use 3/4" or 1" pipe to slow the oil flow internally, so the oil could "spread out" in the cooler, but the loop is effectively closed, meaning the pump shouldn't need to do anything any different, and you should see the same pressure through the entire system.

Theories are great on paper,but don't always work in real life as good as they do on paper. Before you think you know everything ,maybe go install an oil cooler on your stock 5.7's oil system and see what happens in real life. Your paper theory counter acts pretty well everybodies findings that's ever put an external oil cooler on a stock oiling system.

 

[18CrewDually]

I haven't just as an engineer with hydraulics experience, it just doesn't add up that a pump powered system would lose pressure. Pressure is a measure of flow through a restriction. The oil cooler should at worst slow down the pressure ramp, IE when you first hit the gas, the time from idle pressure to "full" pressure takes "x" seconds, the addition of the cooler should make it "x+y", but you should still reach the same pressure after a bit of time. The pump pushes "z" oil/second, upto max pressure. (IE Pressure Washers are rated at PSI with the smallest nozzle they can handle, but the flow rate is with no restriction at all, so you aren't pushing 1.2GPM at 2300PSI, it's more of an either/or)

The cooler probably does create a LOCAL pressure drop in the cooler, but it should still allow the same volume of oil to flow through it in a give time, just internally to the cooler the oil will be slower flowing to give it time to lose some heat, by the cooler using larger tubes than the feed/drain side hoses. (IE the hoses from RAM would be 1/2" (or w/e), and the cooler would use 3/4" or 1" pipe to slow the oil flow internally, so the oil could "spread out" in the cooler, but the loop is effectively closed, meaning the pump shouldn't need to do anything any different, and you should see the same pressure through the entire system.

Your theory can hold true if static without flow, like a dead head situation.
Once flow is introduced, the cooler and longer lines will show a slight pressure drop on the other end. Is it enough of a drop to make a difference is the question?

I found a good video demonstration you should enjoy if you have a hydraulic engineer background. In his tests, picture all the bends and friction of an oil cooler.

Flow and Pressure in Pipes Explained

What factors affect how liquids flow through pipes?Engineers use equations to help us understand the pressure and flow rates in pipes. Pipe systems are impor...

youtu.be

 

[Wild one]

Your theory can hold true if static without flow, like a dead head situation.
Once flow is introduced, the cooler and longer lines will show a slight pressure drop on the other end. Is it enough of a drop to make a difference is the question?

I found a good video demonstration you should enjoy if you have a hydraulic engineer background. In his tests, picture all the bends and friction of an oil cooler.

Flow and Pressure in Pipes Explained

What factors affect how liquids flow through pipes?Engineers use equations to help us understand the pressure and flow rates in pipes. Pipe systems are impor...

youtu.be

That's a great video,up till the end where he start's advertizing,lol. The pressure drop was more pronounced when he went up to 0.9 gpm,now just imagine the pressure drop when you're moving 4+ gallons per minute like the average oil pump moves.Every oil cooler i've ever looked at employs several 180 degree bends,not just 90's like in his test