As you all know, oil restrictors restrict oil being pumped into the turbo housing. Well if you shut down that feed hole, yes it DOES restrict the VOLUME of oil going into the turbo, but wouldn't a smaller hole RAISE the pressure of oil going into the turbo?

Thanks, Wade

 

It raises the pressure on the oil pump side of the restrictor, and lowers it on the turbo side. Well, if the turbo's ability to pass oil through it's bearings is sufficiently large, that's what a restrictor does.