Aluminum Dry Sump Tank Questions Options

[gnomefabtech]

Hello All. I'm using one of Ben's aluminum dry sump tanks and am having some issues with the motor "wet-sumping" and flooding out my turbo.

I have a cracking valve in the oil return hose and I'm pretty sure the oil isn't coming in that way, but I'm wondering if it can come in through the scavenge side instead. I don't have a check valve in there because I assumed (yeah I know what happens when you assume) that the outlet was above the oil level and there would be no way for it to return that way.

Is all I need a check valve on the scavenge line? Does Porsche have one there on it's stock dry-sump setup? I'm not running a Porsche engine but it is a dry sump.

Thanks.

[mb911]

Oh and what engine you running and what height in relationship to the tank is the engine running oil level. If the tank is the highest point a check valve of some sort will be required. The pump in the 911 engine acts as the check valve and with worn gears it leak into the sump over time. A turbo typically gets feed from the pressure side like from the pressure switch port. The drain will typically benefit from a scavenge pump that leads back to the tank and empties near the top of the tank. That’s also how 930s work