Boat under 2000lbs+ v8= 44mph top speed?

Chaz7R · Jun 17, 2011

I have a 1997 Moomba Boomerang with a 265hp 5.7l boat weighs 1950lbs revs easily to 4800rpm checked the speed with gps last time out im hitting 44.2 mph at about 4600 rpm. I know the boat is made for towing and probally is pitched for towing but it is considered very light for a ski boat and the hull is very low and sleek. I was hoping for at least 48. I only ski/ wakeboard half the time, the other half i like to hot rod around the lake lol. Do they make higher pitched bronze props for inboard ski boats if people felt the need for speed lol?

'78 Crusader · Jun 17, 2011

Re: Boat under 2000lbs+ v8= 44mph top speed?

Yes they do. I can tell by the V-drive in your avatar that you might know a little bit about props. I just talked to a buddy of mine on Wednesday who just repropped his Ski Natique. I'll call him later and ask him where he got his from.

QC · Jun 17, 2011

Re: Boat under 2000lbs+ v8= 44mph top speed?

Look at all of the test data, all over the place. You can add as much horsepower as you want to a tournament boat and they rarely exceed 45, and never reach 50. Just the way it is

vfrkent · Jun 17, 2011

Re: Boat under 2000lbs+ v8= 44mph top speed?

The speed is limited on the ski boats because of not being able to trim them out, they end up plowing through the water with a lot of wetted surface friction, they do well for what they were designed but speed is not one of them.

Regards,
Kent

oldjeep · Jun 17, 2011

Re: Boat under 2000lbs+ v8= 44mph top speed?

You can reprop to get a higher top speed, but with a tournament ski boat hull its going to be a scary ride especially if you hit any chop. They design those boats to go 36 MPH

Tahorover · Jun 17, 2011

Re: Boat under 2000lbs+ v8= 44mph top speed?

You hull is made to make a nice wake it's not to go fast. Most inboard ski hulls do not have lifting stakes, so there is a ton of hull in the water at speed. Adding a cup to your propellers tip will give you some bow lift and a few extra MPH. It is a common practice in the vintage wooden boat world with old school hull design.

Here is a good example of what a tip cup can do to bow lift:
http://www.youtube.com/watch?v=fEc72hjJs6Q

1980Coronado · Jun 17, 2011

Re: Boat under 2000lbs+ v8= 44mph top speed?

Call Vince and Discount Inboard Marine......803-345-0996. He probably has some experience with your exact setup.....they have a 30 day satisfaction guarantee on props. Vince has years of experience with tournament ski boats and he's still barefooting in his fifties. He'll be able to tell you if you can squeeze more out of it.

http://www.skidim.com/products.asp?dept=1084

Tahorover · Jun 17, 2011

Re: Boat under 2000lbs+ v8= 44mph top speed?

Oh yea your prop is not bronze, but Nibral.

Bondo · Jun 18, 2011