looking good

Blimey Peter,

You sure got my respect! I think it is very laudable of you to educate the fast boaters so altruistically.
Yesterday early in the morning, I Googled on “trim tab mounting opinions” and came across your name......................................
Finally in the evening (after having a mouse finger and square eyes from watching the screen) I had read most everything to find from you, also on Boatmad and your own site.
It was like one is looking for a tip, how to string a guitar and suddenly find Eric Clapton explaining how he improves his instruments and plays his grips and gigs. I just kept on reading and haven't done anything as planned to do that day..... thanks!

According to what Volvo Penta told me, the DPR drives can still be bought as spare parts in the future.

I have driven several hundreds of hours on sea trials, training and demos in this boat http://www.youtube.com/watch?v=g9eKKGdam3o
It is a conventional 10,9 metres mono hull (light ship 3900 kg / fully loaded + 6 pax 5200 kg) with 2 x 370HP/ D6 and DPR drives.

The first hull ( on the clip) was the fastest one, running 60kts with 2 pers. This boat was intended to be a shake downer and constantly driven to the limits. Later hulls for sale , had anti fouling and were 2 kts slower.
All in all, I can say: the DPR drives are quite good and will survive a good beating (as long as you close the throttle in time when coming off waves) Manoeuvring with the twin duo props is great fun and very easy.
Hefty speed turns are possible with the legs trimmed in.The duo props are great in this set up and give plenty stern lift.
At top speed we measured 2.1 bars of dynamic water pressure in the o.e.m. plastic strainer on the engine. I noticed you have the updated strainer version already on your 435, plus with your bespoke intake it'll be different. But I'd say, keep and eye on it, I hated all the salt on the engines every time the o-ring blew up and we received message of a new pope ( white smoke ) from the engine room. And if you haven't already thought about it, precisely measure for any stray currents (especially with all the conducting carbon parts) between boat and engine, otherwise your anodes and weaker parts (intercoolers etc.) will keep you busy!

For work, we run a couple 8 metre ribs with a single 350/D6 with DPH drives, these boats run some 45-47kts ( the limit ) and there is some pitting on the root of the Nibral props from cavitation, but they survive.
Drives are serviced as recommended and overhauled every 1000hrs. Good drives for the job, evident though to keep a close eye on spun up fishing lines that’ll eat the seals. If not noticed, seals start leaking and the oil will be a salty emulsion in no time

And please keep the tuition coming I savour it!

I am quite interested in your steer by wire project and will give you a call

Best regards from the other side of the Channel
Paul Hollander

Thanks offshore excursion and rickg 1984
Made lots more progress finished making all the parts for the front wing mounting and bolted the bases to the nose moulding, this will be used as a jig so that all the parts fit nice and flush with the deck. Also made lots more progress on the wiring front, i have used standard Volvo looms which are concealed where possible which i have tailored in situ so there are no coiled up excess wires anywhere, they are also identified port and starboard along their lengths for easy recognition.

Peter

Wiring pictures

Thanks Paul,
You must have had lots of patience to read all that information in one go.... Volvo spare parts to rebuild the drives are very expensive in England as i knew production was coming to an end i bought 3 new drives which are in our stores, i have also had severe strainer lid problems which i eventually cured by making a cantilever bracket from the cam covers this time however i am incorporating a pressure relief valve in the strainer lids to take out any unwanted spikes. I have treated all the carbon parts as if they were metal and will also be experimenting running without anodes as the boat is kept in a dry stack but monitoring corrosion very carefully.

All The Best
Peter

As Peter said they're made by Albright but are available here in the states. We use them quite a bit. The model you're looking for is probably the DC88 and they're commonly referred to as "reversing contactors"

Hi All,
Made lots more progress on the wiring all the basics are now in. I have kept wires for different functions in individual trunking where possible, also finished of the rev counter mounting pod and installed it.

Peter

This project is really amazing! I wish I could give my boat this kind of upgrade.... What is the latest status on the D6 435 engines, what upgrades have you made and what kind of horsepower and performance are you expecting?

Regards
Gustav

Thanks Gustav,
435 engine mods:
1. High capacity large diameter raw water cooling pipes this allows better cooling as the water is less turbulent.
2. An increase in the common rail pressure of 150bar.
3. A remap of the engine ecu to take advantage of the increase in fuel pressure and also increase the max rpm from 3500 to 3750.
4. Large diameter freeflow exhaust system.
5. Cool air feeds to the engine air cleaners.
These modifications should make around 500hp with the torque deliberately mapped out so it doesn't exceed 1000 nm, in it's old configuration the boat ran 72mph with the reduction in weight of around 1300lbs and the increase in power i am expecting the boat to run 78mph plus with the ability to run wide open throttle all day if you want.

All The Best
Peter

any updates on the project?