Flow rate of oil pump -how many gallons per minute?
#1
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Does anyone know how many gallons per minute a Boundary Stage 2, and standard VVT oil pump can flow at 7000rpm? I have asked Boundary, but no response so far.
If anyone could direct me to the figures, it would be mucho appreciated![](https://www.miataturbo.net/images/smilies/smile.gif)
Many thanks.
If anyone could direct me to the figures, it would be mucho appreciated
![](https://www.miataturbo.net/images/smilies/smile.gif)
Many thanks.
#3
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If you know the exact geometry, the calculation is not that complicated. Oil is non-compressible; as such the flow rate can be obtained by calculating the change ratio of area between the inner and outer "gears" multiplied by the input=crank RPM where you want to calculate the flow at. This will give a good approximation; however it excludes any leak back in between the gears.
Here's a good read:
https://www.researchgate.net/profile...0e4e71ed79.pdf
Here's a good read:
https://www.researchgate.net/profile...0e4e71ed79.pdf
#4
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The problem is finding the exact geometry when specialist instruments are required. It would be easier to bodgy up some sort of test bench, where the pump is mounted on a frame, the pickup[ is submerged in a container of X gallons of oil, and the pulley is rotated at Y rpm. Then we could just measure how much the output mouth discharged per minute at Y rpm...
#6
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I've also done this, the sump will empty itself in about 30 seconds out of the oil gallery in the head. I once left a plug out and pump half out in 10 or so seconds, and thats through the tiny cylinder head restrictor (approx 2mm).
Perhaps we just put it in a bucket, turn it by hand 10 times and then multiply that amount by 700 to get an equivalent of 7000rpm.
Dann
Perhaps we just put it in a bucket, turn it by hand 10 times and then multiply that amount by 700 to get an equivalent of 7000rpm.
Dann
#7
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I've also done this, the sump will empty itself in about 30 seconds out of the oil gallery in the head. I once left a plug out and pump half out in 10 or so seconds, and thats through the tiny cylinder head restrictor (approx 2mm).
Perhaps we just put it in a bucket, turn it by hand 10 times and then multiply that amount by 700 to get an equivalent of 7000rpm.
Dann
Perhaps we just put it in a bucket, turn it by hand 10 times and then multiply that amount by 700 to get an equivalent of 7000rpm.
Dann
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