Pump Flow Rate...

[KILLER 'B']

I have a question.. How are these pump shops measuring flow in a pump?
All of my experience has taught me that when you bench a pump, you measure total flow in cubic millimeters/ 1000 cycles or strokes at full rack travel. But most pumps seem to be measured in cubic centimeters. It is that Cubic millimeters is too small of a unit of measure for how much these pumps are flowing? Are all plungers added together?

i.e.: A stock 215 horse VP produces 93 cubic millimeters of fuel per stroke at full horsepower.

93 cubic centimeters x 1000 strokes = 93000 Cubic millimeters
93 cubic millimeters X 6 plungers = 558 cubic millimeters.
558 cubic millimeters X 1000 cycles = 558,000 cubic millimeters

93 cubic millimeters = .093 cubic centimeters
.093 cubic centimeters X 1000 Strokes = 93 cubic centimeters
.093 cubic centimeters X 6 plungers = .558 cubic centimeters
.558 cubic centimeters X 1000 cycles = 558 cubic centimeters

So a stock 215 VP can flow 558 CC at stock horsepower?
Or does it flow 93 CC at full horsepower?

Doesn't see to make any sense to me...

Am I correct on this or a lost cause?

 

[White Knight]

Cubic centimeters per one thousand strokes per cylinder is how p7100's are measured.


If you wanted cubic millimeters, multiply # of cc's by 100 cubic millimeters per cubic centimeters. Now you have cubic millimeters per one thousand strokes per cylinder.

If you want total pump output through all cylinders just multiply by 6.


I assume you mean 93cmm per all cylinders per stroke: So 93 cubic millimeters per stroke per all cylinders equals 155 CC's per 1000 strokes per cylinder.

 

[Tate]

Cubic centimeters per one thousand strokes per cylinder is how p7100's are measured.


If you wanted cubic millimeters, multiply # of cc's by 100 cubic millimeters per cubic centimeters. Now you have cubic millimeters per one thousand strokes per cylinder.

If you want total pump output through all cylinders just multiply by 6.


I assume you mean 93cmm per all cylinders per stroke: So 93 cubic millimeters per stroke per all cylinders equals 155 CC's per 1000 strokes per cylinder.

Cubic centimetre is 1000x a cubic millimetre. So the 1000 strokes to equal cm3 is the same as one stroke to equal mm3. AFAIK, the volume is per barrel.

 

[KILLER 'B']

bump

 

[White Knight]

Cubic centimetre is 1000x a cubic millimetre. So the 1000 strokes to equal cm3 is the same as one stroke to equal mm3. AFAIK, the volume is per barrel.

Oops I was thinking squared :bang Then the 1000s would cancel. So then yeah the 93 quoted would make more sense per cylinder.