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but what does ‘dual stage’ mean to the layperson?
Two pumps stacked on one output drive from the exhaust cam, first stage scavenges the rear of the head, second stage scavenges the front of the head.
Under low load conditions the second stage is going to be returning very little to nothing- under heavy braking and/or turning left it’s going to be working hard. The second stage is absent on the standard (single stage) design, and you are on your own with the oil pooling issue.
Dammit
Dramatic_Hammer
I would want to know:
Body material
Internal material(s) - possibly name supplier of impellers/etc
Elastomer type(s)
Output pressure vs original (a pump curve isn’t necessary but what does ‘dual stage’ mean to the layperson?)
A technical drawing might be nice, at least for external dims.