Many of the props used where regular Bravo 28p. I don’t believe any of the boats i saw in quick search had the ITS.

yea I noticed the same and which is why I am concerned something else is wrong. It should do close to 80. I’m going to play with the new prop on more today but what concerns me more is how it just unloads and slips as soon as it gets on plane. Maybe that’s normal for these boats? I have little experience but I’m told by friends it’s not right. I like going fast but also don’t wanna piss away fuel while cruising.

You are using a FS Bravo prop though right ? So that and the ITS are different from the other boats.

yes, I have all the plugs in also.

Get a stock 28 Bravo to test. Get that out of the equation.

there was a stock bravo originally on the boat. I assumed they were the same minus the holes. Boat did same thing. The FS was all that was available without a long wait. With the FS my top speed is a little better but still slips as soon as it gets on plane. I’m ok ordering a custom prop. I just wanted to order this prop to try to figure out if I had another problem going on other than a prop issue. I’ve read the drive shower can cause cause cavitation at lower speeds. 🤷‍♂️

No way that boat will run 80 with a 525. 72mph is about right. It took 700hp+ for my 28 to run 80.

if that’s the case I’m still ok with it. I feel it has more than 72 in it. Based on the slipping. But my main concern is that there are no major issues that I can adresss over the winter and get it over with. I bought the boat from a performance shop on consignment. Owner always serviced the boat and did the motor work. He claims he personally saw the boat go 80. Weather that’s close to 80 or exactly 80 🤷‍♂️. I’m bringing it back to him next week. He has been away and I’d like outside opinions to make sure I’m getting accurate information. I know cars and engines but boats are new to me.

A higher pitch prop, 30, may help with your slip issue and speed, especially a 5 blade. My Daytona planes faster, has less slip, lower rpm at cruise and similar or faster top end with a Max5 or Maximus. If you want a lot faster on your Sunsation, look into installing a Whipple. It's only money.

Don't get too excited about high prop slip numbers. Nearly every single engine boat I have owned ran about 20% and when I would add drive spacers or blades to the prop to lower slip #s, bad things usually happened. An XR drive is the equivalent of a GM 10 bolt rear end, you hook it up too hard and it will break.