Oil Pump Flow

9 pints per minute. Volumetric rate would be in gallons. Two and a quarter per minute.

I’m not sure what the reason is for this question?

Obviously, rate would change with engine RPM’s.

Happy Holidays.
 
I know if you don’t drain the oil, and then take the valve cover off to adjust the valves, oil will overflow on the floor when you crank the engine over for the next adjustment.
 
WHN said:
9 pints per minute. Volumetric rate would be in gallons. Two and a quarter per minute.

I’m not sure what the reason is for this question?

Obviously, rate would change with engine RPM’s.

Happy Holidays.
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9 pints is 1 1/8 gallon I believe.
 
"The gallon is a unit of volume in British imperial units and United States customary units. The imperial gallon (imp gal) is defined as 4.54609 litres, and is or was used in the United Kingdom and its former colonies, including Ireland, Canada, Australia, New Zealand, India, South Africa, Malaysia and some Caribbean countries, while the US gallon (US gal) is defined as 231 cubic inches (3.785411784 L),[1] and is used in the United States and some Latin American and Caribbean countries.
There are four gills in a pint, two pints in a quart, and four quarts (quarter gallons) in a gallon, with the imperial gill being divided into five imperial fluid ounces and the US gill being divided into four US fluid ounces: this, and a slight difference in the sizes of the imperial fluid ounce and the US fluid ounce, give different sizes for the imperial gallon and US gallon"

So which gill are we talking about?
 
updraught said:
"The gallon is a unit of volume in British imperial units and United States customary units. The imperial gallon (imp gal) is defined as 4.54609 litres, and is or was used in the United Kingdom and its former colonies, including Ireland, Canada, Australia, New Zealand, India, South Africa, Malaysia and some Caribbean countries, while the US gallon (US gal) is defined as 231 cubic inches (3.785411784 L),[1] and is used in the United States and some Latin American and Caribbean countries.
There are four gills in a pint, two pints in a quart, and four quarts (quarter gallons) in a gallon, with the imperial gill being divided into five imperial fluid ounces and the US gill being divided into four US fluid ounces: this, and a slight difference in the sizes of the imperial fluid ounce and the US fluid ounce, give different sizes for the imperial gallon and US gallon"

So which gill are we talking about?
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The question originally was about volumetric flow. Remembing back many years, that represents the amount of fluid passing over a given area in a period of time. 9 pints per minute or 1 and 1/8 gallons per minute with Model A oil pump. Volumetric flow is usually measured in gallons.

I have been out of college since 1968. So give me some space here.

Hope everyone is having a wonderful Holiday.
 
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I was hoping that there is some experimental data points, perhaps measuring the pumps output at 500 RPM and at 1000 RPM.
 
Bob Bidonde said:
I was hoping that there is some experimental data points, perhaps measuring the pumps output at 500 RPM and at 1000 RPM.
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I think Lawrie did some tests like that when building his Burtz engine and compared the results to a B oil pump and another high volume, high pressure pump which he decided was too much. He reduced the height of the gears by about 20mm to get what he wanted. All of that is from my poor memory so check for yourself before acting on it.
 
bob. Perhaps check out Randal Strickland's you tube channel. he ran some tests on oil pumps that might answer your questions
 
I have my original 34 V8 engine apart just now.
It has the original early pump in it, this is the same displacement as a Model A pump (same gears), at 7.5 cc/rev, the later V8 pump has 10 cc/rev and the last of the V8 pumps with helical gears has 14.1 cc/rev
It is very easy to work out the Litres per minute , just take HALF the engine RPM at the speed you want to check and multiply it by the pump displacement.
so at 2000 rpm. its 1000 x 7.5 cc=7500 cc/min =7.5 litres /min.
OH, the early 7.5 cc pump on my V8 is going in the bin, replaced by a 10.cc/rev one,
I have not got the figures at my finger tips but the pumps fitted to our Burtz engines are I think 16 cc/rev
Lawrie
 
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