A bit of a general question about dry sump systems:

I understand that the scavenge pump draws oil from the dry sump pan and pumps it to a seperate cylinder. Is this cylinder then plumbed in to the engines regular oil pump via the original oil pick up point? I assume this must be the case since otherwise the original pump (unless disabled somehow) would just pump air into the oil galleries, obviously not a good thing! Im assuming there are variations between different set ups etc. I hope this makes some kind of sense.

Cheers

Adam

there are basically two "types" of system.

the cheaper ones do exactly as you say, one way or another the std oil pump draws from the tank.

on the better systems, the normal oil pump has its pumping parts removed and it's ports blanked off, and a further stage on the balt driven pump then provides the oil pressure for the engine, hence the commonly used "three stage pump" (two scavenge and one pressure)

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Originally posted by Prez
A bit of a general question about dry sump systems:

I understand that the scavenge pump draws oil from the dry sump pan and pumps it to a seperate cylinder. Is this cylinder then plumbed in to the engines regular oil pump via the original oil pick up point? I assume this must be the case since otherwise the original pump (unless disabled somehow) would just pump air into the oil galleries, obviously not a good thing! Im assuming there are variations between different set ups etc. I hope this makes some kind of sense.

Cheers

Adam

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I run a 3 stage pump.

The original oil pump is removed and I tapped the oil way from the pump into the block and put in a grub screw.

To get oil back into the engine I removed one of the core plugs / blanking plugs on the end of the main oil gallery and bolted on a dash 10 fitting.

The dry sump system works very well but it was so much work, building a sump, mounting the pump, routing all the hoses, mounting the tank, remote filter etc.

John