oil pump question ?

it is called an m72hv for a reason, it is bigger than a stock pump, it pumps more volume. the relief valve is controlled by a spring - more related to pressure. for 11 seconds or so a hi volume pump and a stock pan (usually no baffles so if the acceleration is good the oil sloshes to the rear and the pickup sees less oil) can get by. but for a longer blast what can happen with stock heads and block oil drainback areas is the oil does not drainback fast enough and the pan gets sucked dry, oil pressure temporarily is zero. I have seen it