Have a 99' 2855 Bayliner Cierra, 5.7L Thunderbolt 5 w/ Alpha 1 Gen ?(seems underpowered). Running a 16X11 prop. Top speed on a good day is 32 mph. WOT runs up to 4800 rpms (again on a good day) do have bottom paint. Would like to be able to produce more speed without too much loss on getting up...