spider wrote:
Interesting to see two of them. Must cause a few sync issues maybe. Although they had two meaty looking marine units in before.
I would of (thought) one good XUD9 would of been enough to drive two propellers but I have no real idea really about boats, perhaps just fabricating it to one power source (two props) would of been difficult) although twin engines does seem a lot really.
Interesting to see anyway, although I would of used the later thermostat fuel filter / heater units myself for simplicity and slightly less plumbing, although that's probably me being picky.
The original engines were a pair of marinised BMC 2.5 litre diesels, I'd guess that the XUDs were as powerful if not more powerful, but still you'd need a pair of them to match the old engines.
When you marinise an engine, you've got to replace radiators with some other means of cooling, radiators need big openings in the hull which is a way to get lots of water into your boat in heavy seas. You can either go raw water cooled (run sea water through your engine block) or have a separate cooling circuit and a heat exchanger. Raw water cooling needs an engine made of materials that can tolerate salt water, I don't think the XUD will tolerate raw water cooling so you can't use its thermostat and really you need a heat exchanger.
The other thing you'll see fabricated is a water cooled exhaust, exhausts get hot and glass fibre hulls don't like heat that much! Water cooled exhausts typically just inject water into the exhaust close to the manifold and then have a swan neck or other water trap, they can be fairly quiet without having any silencer at all.
