DONT SMOKE YOUR turbo! Oil Hard lines, scavenge manifold for the LOW MOUNT Turbos 

No definitely not. The entire point of the manifold is to pull a vacuum and scavenge the oil from the drain side. The is exactly how we do this on our turbomachinery the I design the oil systems for. A great pressure delta across the ball bearing will increase oil flow and drop the delta t of the oil significantly. The seal will still be positively loaded (more compressor and turbine pressure on the diffuser plate than in oil drains). You get in trouble when the loading on the seal is the other way around and you're drain pressure exceeds the compressor or exhaust pressure (or even comes close).