Well so far the bigger prop has given me the most speed but at the same time most trouble . I agree it's a matter of finding the best prop but that can also run into the $$$ . I'll try this one more test with the new strut then i'll start playing with different props . I did try a Voodoo 6717-3 and it just dug a hole . The right prop has to launch the boat out of the hole and stay straight for 264 feet . When I accomplish that I'll be happy .