Can I run a Wet Sump engine and create vacuum in the crankcase?
In Wet Sump applications using PetersonØs Wet-Vac§ external pump or other manufacturer’s vacuum pumps to create a vacuum in the engine, you will notice that as the vacuum increases, the oil pressure will decrease. This is the result of the pump having to suck the oil out of the pan, and in doing so, overcome the vacuum in the pan. As the vacuum increases, the force necessary to suck the oil from the pan increases and the pump is unable to completely fill on each pumping action, causing pump cavitation. Since the pump is pumping with less efficiency, due to the vacuum, the oil pressure decreases.
