The boat is a '91 Formula 311 currently with stock 454 MAGs(365pshp).
I've read a ton of posts in the Formula forum, the general thinking is that they're stern heavy and benefit from stern lifting props. But some guys are running Bravos where others are running a Q-IV cleaver.
I have to admit, I've already put money down with Hydromotive, and Todd has been extremely patient and helpful in educating and advising me. I'm not posting to get a second opinion, but to get more info so I can be better educated on the theory/practice behind the recommendations.
For those that haven't read my other posts, I also admit I'm a total newb when it comes to running an offshore powerboat. I still haven't figured out exactly what the boat prefers in the way of drive and tab trim.
Right now the recommendation is a Q-IV X, the round ear. I'm also throwing a little bit of a wrench in the works because the boat will get more power soon, so I'm trying to get a pitch that I "think" will work with my power goals (450pshp).
Thanks,
Michael

I feel your pain. I too am new to this game, having just bought my first "real" boat; an 01 F-271 with a stock 496HO, B1, 23P. My fist impression of the boat, and what I read here, is that it is stern heavy, so I'll be paying close attention here.

There are stern and bow lifting propellers. Some of each of these propellers offer aditional benifits to the opposite side.

The Bravo 1 propeller is one of these propellers.

If you would like to understand more about this, there are many threads in the history of this forum to teach the basics and the depths of hydrodynamics.

Otherwise., call us and we will explain it at length and can also supply you with propellers to try. This way you can learn first hand.

The Quad IV X you mentioned is very similar to the Bravo 1 prop in many respects. The only issue we have had with the Quad IV X is getting on plane.

If your boat has a difficult time getting on plane now with a Bravo 1 prop, due to ventilation, you will have a more difficult time with the Quad IV X.