My 184,,with 225 Promax,,,,GPS'ed at 77mph,,,, before I made her street legal. That was 6500rmp with a 26 Tempest. 28 Masco just had poor hole shot. I had just purchased the boat from a friend looking for " Speed". He is now running a Bullet w/300.,,,, me I am still doing 44 mph. in my new 203 LE to youngsters.