I run a 26 fury when hot, 27 fury when cold. Load an driving will be your final factor on top end. I run medium load ( my opinion). Pole, 4 batteries, 2 folks an gear, 3/4 gas 79-80. Solo 81 ( now speeds with 26). Winter 2 folks 81-82. Best speed solo 83.8 . These are at best #s, it wont set an run on these #s for miles an miles. I probably running plate inch ( maybe more )higher on top end than take off. With hydro plate all way down subtract 2+ mph off top end. I like the new foot, motor not as strong as previous years. Would like to see new foot on the 2011 I had. Good luck with it.