I get 75.7 GPS in my 2005 21X, with 225 Optimax, 26 Tempest Plus, 6 inch jack plate with a little under half a tank of gas and full tournament load going down river and get around 72-73 GPS up river and on lakes. Propshaft is between 2 3/4 and 3 inches under pad. Any lower and it is walks too badly to be able to drive it, any higher and I start to hit the rev limiter. It handles great where it is. I can take corners better and faster than most boats I have been in by just trimming down a hair. I may send off my spare 26 Tempest Plus to Marc and see if I can get a few more mph out of her. Good luck, your friend should be able to get a little more speed out of that boat.
Modified by gcoxvb at 12:12 PM 5/18/2006