rob vanharten

So I would really like to put surface type drives on my boat. I have been researching all of the available options, and have to come to the conclusion they are all very spendy. Could a guy take a bravo xr put the imco -2 lower on it and then add the imco extension box which lifts drive another 3 inches up. I realize alot more measuring and correct prop depth reasearch would have to be done to get the correct depth, but I am just trying to get an idea if this would even work. Then run some surface piercing style props, and have basically surface drives? I have a 86 357 formula with straight bottom, no notch no step's. I know these boats came from the factory with kaama drives, so I believe surface drives should work with this hull. What does everyone think about this?

Brad Zastrow

Many high performance boats can what I call, surface a Bravo drive. Fountain race boats are a good example. However I do not think you have the hull for a really high x-dimension. It will only blow out and probably not even get on plane. Maybe check with the factory on how high you can go.

t500hps

By the time you spent that much money you should be close to an arenson/bravo conversion and then have a setup that is known to work.

rob vanharten

I realize the money side of it, but as far as the theory being put into practice, is it doable? If the hull would work with arnesons/ kamma's, why would it not work with the bravo's? It would be the same concept as a #6 would it not.

Jpzaluski

All other factors negated, I think even if you did do this you'd be seriously limited by the diameter/type of prop you could swing. A lot of Arneson and other surface piercing setup's use some monster wheels to work efficiently. I think prop selection will kill the setup even if everything else went off w/o a hitch.

Griff

Why do it in the first place?????? You may even loose performance and the ability to carry the bow enough. This would translate into running the hull wetter and a slower top speed.

rob vanharten

I am having my motors built right now and I currently have trs's which I know will not live to long behind these engine's. I know everyone will want to say Konrad's which is fine but I like being different. I would really like to do a surface drive set up, a. they are unique b. they will hold the power c. I should be able to pull about 10 more mph on top end if set up right d. they look sweet throwing the rooster, and hanging off the back of the boat. But 50k plus on arnesons!!!!!!!!!!!!!

Perlmudder

Seems like a recipe for blowing bravos...

JaayTeee

Thank you


....and cracked/broken prop blades

Knot 4 Me

If you want surface drives then put surface drives on it. Otherwise you will end up with a cobbled up mess that will probably run slower than it will with a Konrad conversion.