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Old 30 October 2003, 12:28   #1
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Common Rail Diesels

Common Rail diesels are undoubtedly the way forward. They are more economical, have bags of torque and have no trouble with the forthcoming emmision regs. Why then is it that only Volvo seem to have a common rail engine (D6 - 310) on the market. I am currently speccing a new Redbay 8.4 but the D6 is too heavy, redbay have recommended the Volov KA300, but I reckon common rail is the only way to go. Anybody know of any other common rail engines on the market?

P.S. The Yanmar 300hp would be a better bet than the Volvo Ka300, right?
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Old 30 October 2003, 14:41   #2
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Could you please tell us, in words of one syllable, what the diference is between a common-rail diesel and, er, the other type?
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Old 30 October 2003, 14:52   #3
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I'll try. Common rail diesels have a rail that sits above all of the cylinders in the engine. The rail is full of pressurised fuel ready to be injected. A computer controls when the rail injects fuel into the cylinders. It is quicker and more precise than standard direct injection. Diesel car engines have used common rail for a few years now, and it's leading a revolution; making diesel cars much better thatn petrol ones (faster, more economical and fewer emissions). Why aren't more marine diesels common rail?
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Old 30 October 2003, 15:09   #4
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Have never seen a diesel engine that is faster than petrol in a car, maybe stronger but not faster, and it`s not every country that diesel engines are more economical, they are more expensive to buy and in Sweden for an example we have higher taxes on a diesel engine than on a petrol engine.
You must drive at least 20000 km before it`s more economical than petrol, i think an average person are driving around 12000 km per year.
I know on boats in Norway, both petrol and diesel engines they pay 12 GBP/HP in tax when they buy a boat, it`s unbelivable expensive, so check it up in the country you live in before buying, maybe it`s same rules in UK, but not outside UK.

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Old 30 October 2003, 17:01   #5
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Re: Common Rail Diesels

Quote:
Originally posted by Redbay Rover


P.S. The Yanmar 300hp would be a better bet than the Volvo Ka300, right?
Some may think so.

There have been a few debates on here, do a search.
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Old 30 October 2003, 17:09   #6
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Sorry but Wrong RedbayRover.

Eve all

In answer to your question why arent all diesels common rail,then its down to development and tooling costs and getting rid of old stock.The D6 will be worth having when its putting out 400+Hp as it has the stroke,At the moment the advantages arnt worth having over a kad300 eg costs and extra weight ect.

All that sort of stuff.

In answer to Yanmar being better than Volvo why do you say that?
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Old 30 October 2003, 17:16   #7
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Hi CH. Well wot's it like?
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Old 30 October 2003, 17:21   #8
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Happy when its finished

Brill JW, but real slow at the moment,Having to re spec the windows ect,for self righting.I will be happy when its all finished.
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Old 30 October 2003, 17:30   #9
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Why not jump to your old Volvo thread and tell us the stories?
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Old 30 October 2003, 17:32   #10
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Ha Ha, Na Im shy

I will tell all when she is finished,It will make your hair curl.
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