Water pressure running 15 to 20# at around 70 to 80MPH not sure on exact speeds but high speeds 100+ it went past 35 lbs. May have to close off some of the pickups, have done that in the past to regulate the pressure at high speeds.After going through the lower several times in one day in and out at the ramp I was glad to see water pressure, little motor runs cool new pump,impellar, every gasket, pickup tubes ,clean cut sport master will have to fine tune it . Running this motor fairly high maybe 1 1/2" above it had a small porpoise at speed like a floating porpoise in and out the 200 case did not do this ,will get some more time on this lower and make some adjustments.