- #1
bsprowl
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I'm not a student. I'm a 64 year old guy trying to determine the flow change (volume) in an V-8 engine oil gallery.
The feeding gallery comes directly from the oil pump and is 7/16 inch. It ends at a 90 degree intersection with a 3/8 inch gallery. I understand the loss of volume due to the size change and I understand the loss of volume due to the sharp 90 degree intersection. But how much loss is what I'd like to know.
Assuming a pressure of 50 pounds how much volume loss (flow rate?) happens between the feeding (7/16 inch) gallery and the output gallery? How much will the pressure drop at six inches from the intersection? If the pressure was increased to 100 pounds would we get close the the volume of oil available in the feeding gallery at 50 pounds?
Please remember that the pump has a pressure relief that limits the output pressure, so the oil pressure in the feeding gallery is limited by the pump's pressure relief spring. Also an engine's oiling system is just a collection of controlled leaks so this abrupt change in direction probably is the major flow restriction. This 3/8 inch gallery splits into several galleries that feed the cam and main bearings, the hydraulic lifters and the rocker arms.
If it matters we can use an oil temperature of 150 degrees and standard 90 weight motor oil.
Thanks,
Bob
The feeding gallery comes directly from the oil pump and is 7/16 inch. It ends at a 90 degree intersection with a 3/8 inch gallery. I understand the loss of volume due to the size change and I understand the loss of volume due to the sharp 90 degree intersection. But how much loss is what I'd like to know.
Assuming a pressure of 50 pounds how much volume loss (flow rate?) happens between the feeding (7/16 inch) gallery and the output gallery? How much will the pressure drop at six inches from the intersection? If the pressure was increased to 100 pounds would we get close the the volume of oil available in the feeding gallery at 50 pounds?
Please remember that the pump has a pressure relief that limits the output pressure, so the oil pressure in the feeding gallery is limited by the pump's pressure relief spring. Also an engine's oiling system is just a collection of controlled leaks so this abrupt change in direction probably is the major flow restriction. This 3/8 inch gallery splits into several galleries that feed the cam and main bearings, the hydraulic lifters and the rocker arms.
If it matters we can use an oil temperature of 150 degrees and standard 90 weight motor oil.
Thanks,
Bob