I also noticed the pump on mine priming/running longer than "normal"... but it doesn't always happen and when it does there is no ill effects in relation to the startup, idle or fueling under high boost. With a fuel gauge connected there are no signs of insufficent line pressure but the pressure does drop rather quickly after shut down. I have a wideband monitor so I know what my AFR is at all times and it well within spec. My car is also a stage 3 4x4 with an MSD closed loop chip.