Hi whatta life,
The first modification was to fabricate through transom exhausts this made around 15-20HP per engine, i then went on to remap the ECU'S taking the power up to around 400 at this point the standard cooling system was right on the edge so i modified it to flow more water by moving the water pickups from the nose cones on the drives to the bottom of the transom, these are much larger and flow much more water. My engines have done in excess of 800hrs in this modified format and have covered many hours at WOT... The 350HP injectors won't flow enough fuel to go much beyond 400HP but you can get them converted to 435 spec by a competent bosch service centre, this along with upping the common rail pressure gives the required flow to enable 500HP, along with the following parts
1. Heat exchanger from the 435 engine
2. Charge cooler from the 435 engine
3. Hybrid turbo charger
4. Inlet manifold from the 435 engine
5. Remap of the engines ECU
Obviously Volvo don't approve of people modifying their products so would probably steer you away from it, but it is much cheaper than buying a new package!!

Peter

Hi mrfixxall,
The standard drive relies mostly on splash to lubricate the bearings and cone clutches at the moment. The vertical shaft bearings are also shielded which furthur impedes oil circulation, on my semi dry sump convertion the oil is removed from the bottom of the lower unit through a hydraulic pump mounted inside the boat into a filter and returned to the top cap in the upper this has been modified along with the bearings to create a weir system flushing the top bearing and cone clutches plus the horizontal shaft taper roll bearings and gears before returning through the lower vertical shaft bearings back to the lower unit. I have also incorporated a breather which will drastically reduce shaft seal wear caused by pressure build up in the standard drive.

Peter

Nice to see a project with diesels again here ,good luck,and Habana Joe where are you ?
Since the word DIESEL has been wrote here ,his search function light must be flashing now .

These drives are pretty beefy monsters, almost the size of #6's. I'm glad to see someone working them over!

It just registered on my that you said you had 1000 hours on the gears in your drives. Holy crap...

There no reason you can't put a sprayer in the cone area.

Jeff

Hi All,
Final assembly of the drives, machined the oil transfer ports into the upper cap and set the backlash and bearing preload also changed the rear prop shaft as a precaution as i broke one at 450hrs it broke right on the friction weld between the stainless steel and carbon steel, they are now assembled and ready for paint.

Peter

Looks very interesting. I will be curiuos to hear your results.

Hi All,
Having finished the dry sump convertion i have now moved on to the fly-by-wire steering system, i have already built a system for the Ilmor engined boat and the system for the Volvo engined boat will be very similar. Because there is no creep in the system this allows the mounting of trim switches and throttles on the steering wheel as the central position always mantains the drives straight.

Peter

Here is what I had bookmarked online for when I ever buy a diesel 400ss.
http://www.chipexpress.com/products/2457/
http://www.chipexpress.com/products/2458/
http://www.chipexpress.com/assets/im...-thumbnail.jpg

peterunwin and the rest of the diesel guys, you think this can be reliable on current 350 and 370 D6 with DPH?

p.s. peterunwin your doing one hell of a conversion. Continue posting your updates.