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#1
10-21-2025, 06:15 PM
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Pontiac engineering for 60s preproduction.
So this stacked 4 gear pump is one ways the factory was looking into more pressure and volume for SOHC 3 valve per cylinder motor.
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#2
10-21-2025, 07:34 PM
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I guess that was cheaper than making a deeper casting with longer gears?
Actually, staring at the photo for a while, the pumps have a common inlet (the screen), but separate outlets. That way, the output of the lower pump could be dedicated to top-end lubrication. And each pump could have its own pressure regulator, which you couldn't do with a deeper single pump. Clever! Last edited by hgerhardt; 10-21-2025 at 07:45 PM. Reason: duh |
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#3
10-21-2025, 10:33 PM
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Thanks Steve. I may have seen that before.
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