it will work so long as the tank is right above it and gravity feed is straight down ... the bearings can survive on a suprising small amount of oil (as proven by the garret oil restrictor that is smaller than 1/16) ... however if the oil is not evacuated properly they will start pushing the oil into the housings.

i've done a mock up spinning the turbine with a rubber hose connected to a drill ... it has plenty of oil flow through the 4/16 line i used and will need only a small pump (no need for the huge differential pumps many use) to evac the oil.

now the important thing is that you are expecting the oil to lubricate in this case, not cool ... so water cooling or a oil cooler after the pump is needed still ... one or the other.

alternative: there is a oil pressure test port on the oil filter housing ... just have to figure out if it sends the oil there pre filtration or post and how much pressure is sees ... the less pressure the better cause there won't be need for a oil restrictor ... 4/16 line with less than 20 psi is ok ... anything above that and it starts to push past the seals (previous experience). a oil restrictor is very recommended at higher pressure levels and not all turbos have them built in.