lifter galley crossover tube

I need to clarify. In a closed system, there will be less velocity with resistance to flow. The flow will be reduced to the rate of bleed off in the system. An open system will increase velocity with an increase in volume, or a decrease in area, ie an intake port at high rpm. The oiling system will only flow as much as the bleed off will allow. If that bleed off is so high that velocity is also high, then pressure will drop, unless there is an increase in volume.