Thought i would start a thread on this as i can find no directions on how to calc all the possible info here. Post what ever you have figured out. I have still not figured the VE%. They only let you input head flow at max lift to get your VE% to input in the box for VE. My head flow is 356@.800" lift. That gives me 107.9% VE, which can't be correct because pipe max computes that to 800+hp in my pump gas 511. That to me is at least 100hp off. There must be another way to figure this or am i doing something wrong?