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Old 05-12-2014, 04:17 PM   #1
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Country: UK
Location: Cornwall
Occupation: Chimney sweep!
Interests: Boats n Cars
Boat name: Jaykay
Boat make: Triana Tropica
Engines: 2 x GM 5.7 V8
Cruising area: Falmouth

Join Date: May 2014
Location: Cornwall
Posts: 16
Question Volvo DP290 prop sizing-what to increase to?

So finally I have stripped off the many layers of paint and have found the all important numbers on my props - B5 !

Following successful sea trials in the Summer after a complete refit, once the engines were run in, I have found that I am achieving max rpm (4,600rpm) at about 3/4 throttle. I think this is just before the second choke opens. Fantastic initial acceleration and also achieving excellent midrange acceleration. At 4,500 rpm I had 45mph on the speedo and 38knots on the GPS. No problems with the engines at all across the rev range.

Full details are:

2 x brand new 5.7ltr GM V8 315hp per engine - 630hp total
2 x re-furbished DP 290 drives running B5 props
Vessel - Triana Tropica 25ft
Approx weight 4 tons - this is a calculated approximation
Max rpm at WOT 4300 - 4600

There is video on my Youtube account at

Can anyone advise on what props I should be changing to? And is anyone looking for some undamaged B5 props when I carry out the change?

Any help greatly appreciated
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