Had some questions regarding my set up and he seemed to have done it all on the victory style hull. He hasn't been on in a few years and I can't PM him.

My questions are regarding my drive X dimension. I have the 575 with the XR and I have the mercury racing extension box with the hydraulic steering. I have calculated high prop slip, especially at cruise speeds and, it seems the boat responds very little to trim - especially at cruise speeds (at least compared to my previous boats) And he had mentioned in one of his posts I was reading through that the drives sit too low. I was wondering if I should try an IMCO shorty. OR, if maybe I should just start with a BBlades prop.

You have a 28? I spent 5 years playing with mine and here is what I can tell you. Mine had high prop slip as well, usually in the low 20's%. The factory prop height on MINE was too high, around 4" below the bottom of the hull if I remember correctly. I tried a 1" and a 2" shorty with no increase in top speed, just more prop slip. Now, I put a 1.5" spacer on with the 1" shorty and my slip went away, but so did my upper XR gears, but it did pick up 5mph. Some times prop slip is a good thing. All of this testing was with 700+hp and various 4 blade props. Never tried a 5 blade. My guess is that a 5 blade would bring the slip down, the RPM's down and the speed about the same. If you can run around 75mph with it, I would just leave it alone. It is a long uphill battle to 80.

I really appreciate that information. I have the raw water pick up moved to underneath the boat with a sea strainer for increased cooling to the intercooler. Between that and the puley i'm probably still under 700HP, but probably not much.

Did you have the extension housing as well?

I would much rather try a 5 blade prop! Maybe I'll pick one up and give it a try.

EDIT: right now I have a 26P. should I stick with that? It really does get out of the hole pretty good. especially for a big heavy wide 28 single engine.

No extension box on mine. The fastest mine ever ran was with a 26 bouncing off the rev limiter, which was set at 6000rpm. I generally ran a 28B1 and it worked the best all around. It would get on plane in about 2 boat lengths with 10% throttle. I also set mine up LH rotation and it worked much better than RH. I probably have a 28LH laying around if you want to try it