I just got a gps yesterday did some testing and i can say the batteries make all the difference in the world. Last night first pass with my 440prop and my 16c lipos 4s1p I went 43mph then went 41mph. then i put in my 25c lipos 4s1p and went 52.5 backed that up and went 51.2 then i put back in the 16c and went 42mph. no changes to the boat but the lipos all runs where just up and down passes like a s.a.w. run. Today i put in my 442 first pass 55mph. on the 25c lipos. charged them back up and put the 445 in and it went 58.4mph taped the sv back up put it in the water and went 58.1mph. I will say that all conditions were on glass and i would not run the 445 prop for anything but a up and down run.
if i get out on sat i will get some video.








Back up run

442prop