looking for used 44 dancer

Dancin' dave has a great looking 45 dancer for sale.
 
Then you're still looking at the wrong boat....assuming of course you mean 30 knots....youre gonna have to start giving more info in your posts....
 
Cruising at 30 mph - you'll need to go bigger or smaller - Say a 320 with 8.1's and I/O's or a 52 with Manns. Most cruisers target the 20's. Heavy DB's (sedan bridges) seem to run in the low 20's, and well-powered DA's (Sundancers) tend to run in the mid to high 20's. Cruising indicates 75 - 80% of Wide Open Throttle. 80% and 30 mph is not an easy task.
 
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Maybe you're right:

(The rest is cut and paste - It's a 40 DA with 8.1's vs a 44 with -500's, I'm pretty sure)

The Cummins MerCruiser diesel QSC 8.3-500 is a turbocharged-aftercooled direct injection engine with a 114mm cylinder bore and 135mm piston stroke. Removable wet cylinder liners are fitted for maximum reliability and the one-piece crossflow head has replaceable valve guides and seat inserts, while valve actuation is via rockers and pushrods. The aftercooler is seawater-cooled for effective reduction of air intake temperature and the heat exchanger cooling system normally operates at 85 to 95 degrees. The starter motor and alternator are high-mounted, away from bilge water.

At the maximum continuous revs of 2400 the Cummins engines used 75.7lt/h each for an average of 28.1kts, whereas the WOT average for the 40 was 28.9kts on 4750 revs using 132.8lt/h each engine. At WOT and 2670rpm, the Cummins engines used 94.6lt/h each for a 31.4kt average and, surprisingly, noise levels were lower than the MerCruisers at WOT. When the throttles were 'floored' from fast idle black smoke appeared only at 1500 to 1600rpm, where the hull was starting to plane and, through full-lock figure of eight turns at 2000rpm, the speed dropped only one knot with no lost revs or increase in fuel flow.

In my opinion, from testing various petrol MerCruisers in 2005 compared to the QSC8.3-500, petrol engines are fine for infrequently-used sportscruisers to 40ft. But for larger hulls and owners who enjoy offshore passage-making, I would opt for electronically-managed diesel power.

For more on the QSC8.3-500, contact your local CMD dealer or email Murray Clifford at murray.clifford@cummins.com


PERFORMANCE AND FUEL EFFICIENCY – CMD QSC8.3-500

Revs KTS LT/H each LT/H combined LT/nautical mile
550 5.4 1.9 3.8 0.7 (slow idle)
1000 8.2 8.7 17.4 2.1
1500 11.7 27.6 55.2 4.7
1750 16.0 41.6 83.2 5.2 (minimum plane)
2000 21.2 54.9 109.8 5.2 (offshore cruise)
2200 25.5 64.3 128.6 5.0 (efficient plane)
2400 28.1 75.7 151.4 5.4 (max cont.)
2670 31.4 94.6 189.2 6.0 (WOT)

http://www.boatpoint.com.au/Story/Cummins-MerCruiser-diesel-QSC-83-500/1960641.aspx
 
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Those are some general statements on cruise and speed. Can anyone show me a single Cummins document that shows rated cruise at 80 percent of WOT? I have seen how that is true in Cat land but my engines have a rated cruise of 2100 RPM and a WOT of 2350 or so. At rated cruise, this "heavy DB" goes 30-32 .MPH. I know the 44 DB is about the same speed at rated cruise (Cummins). Cruise is also 80 percent of engine load on the QSMs but that is not 80 percent of WOT.

Be careful making general statements like that based on one engine manufacturer and older hull designs.
 
The 44DA isn't a 30 kt boat.

While they may run 30+kts in a new test condition ....i.e. perfect bottom (in real life they never are) 50 gal of fuel (they hold 335 gal), no waste (they have holding tanks), no gear, spares, food, drinks etc. I have a friend who just finished a 1400 mile trip on a an '08 44DA with 500hp QSC's and he ran between 25-27 kts depending upon fuel burn off. Perhaps his speed was chosen becasue he preferred not to load up his engines to the max, the boat was quieter, he wanted more efficient cruise.....likely due to the length of the trip, etc. My point is that, realistically, if you need 30+ kts, you need a boat with more power or less weight.

The other point my friend discovered with the 44 is that the range is really low for a 44' boat because the fuel capacity is only 285 gal, useable ( 335 X 85%) which means that you only have a 10 hour range at the very best under optimum conditions with no safety margin. To give you a comparison, the 45 has 400 gal tanks and an 18 hour range.......it is a shame that Sea Ray couldn't have figured out how to squeeze larger tanks into the 44 because they are great boats otherwise.
 
Four Suns said:
.......Can anyone show me a single Cummins document that shows rated cruise at 80 percent of WOT? I have seen how that is true in Cat land .......
Click to expand...


I haven't seen that to be true with CAT either. My CATs, as per the CAT spec sheet, have a recommended extended cruise RPM of 2400....86% of rated 2800 RPM. I, however, chose to run slower, and more efficiently, at 2250-2325....sometime 2350 if the conditions are just right....I don't have any way, electronic anyways, to tell me my real time load
 
I know someone with a Beautiful '01 410 thats about the same overall size as a 44....:thumbsup:

Lets see.what was his name????.:grin:.Oh yeah....ME!!!!:wow: Think about it, you can use the money you save buying my boat to buy diesel !!:smt038
 
Hello Jbuerkett I sent you a mail, my 42 is for sale, it will do 30 but this is 90% of the high end of the motor. I run all day at 21 knotts and burn 12 gallons a hour ( each motor)

John
 
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