jimmy_the_builder
regular
Reged: 07/09/2005
Posts: 1065
Loc: Brighton
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Quote:
Even the D6 is gradually becoming a more and more stressed member what are they up to now 350
I've got D6 435's in the P42...
Cheers
Jimmy
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Princess 42
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Lateboater
regular
Reged: 06/02/2008
Posts: 88
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Bonkers technology.
NOT approved by any engine manufacturer.
I purchased my engine dyno from a company who had been doing research into 'Propane fumigation of Diesel Engines' for the Energy Savings Trust.
There were some concerns about exhaust high gas temperatures which would lead to premature exhaust valve failure.
However the research was instantly halted following a series of engine 'run aways' on the dyno. If the equipment continues to fumigate when the throttle is closed engine runs on. All vehicle trials were halted on safety grounds when truck drivers also experienced similar problems.
Nowhere near as dire as a 44 tonne truck, however shutting the throttle whilst manoeuvring in a crowded marina and suddenly getting the engine going to WOT on a sniff of LPG. Just the opposite of 'Quick boost and then back off'
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Neddie_Seagoon
regular
Reged: 02/04/2006
Posts: 2779
Loc: IoM
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OMG. Don't show that to HLB. He'll have one fitted to MF in no time 
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Those words came from a small ball of fat that sprang from behind a piano stool.
Ameera's Log Carraghyn's Blog
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ontheplane
regular
Reged: 20/03/2004
Posts: 316
Loc: Bristol UK
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The guy who fitted the LPG conversion to my Jeep Grand also does LPG conversions for Diesels.
There is a power / economy increase of approx 15-25% when administered properly - cost is around £1500.
Why don't manufacturers do it??? Why doesn't every new petrol car come ready to run on LPG? Why, when you ask a manufacturer about converting to LPG they cover their ears and wail about invalidated warranties and how horrible it all is...
Fundamentally LPG is a good fuel but there is way too much prejudice about it - in Australia all Taxis run on it, in Italy a huge number of cars use it - however it's still very much an "underground" fuel in this country which is weird bearing in mind our fuel prices!
As I understand it, it burns better, so when you add it to the diesel engine it helps the diesel to burn much better improving the overall efficiency of the engine.
I know it's tempting to poo poo it, but this does actually work well - and currently LPG is around 50p per litre - although for a large boat it's useless since Calor took away the marine support.
For a van however - especially a lower powered version of an engine that you know will take more power easily - it could work very well. You could fill up the LPG at any Autogas station, I can't see how you'd fill up a boat - you certainly couldn't use the small portable propane bottles.
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Why can't we work 2 days a week and boat the other 5????
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david_bagshaw
regular
Reged: 05/06/2001
Posts: 910
Loc: UK
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There is another method of dual fuel out now, compressed natural gas which is burnt with normal diesel. Electronic signals to the injectors is piggy backed to release cng directly behind the inlet valves. diesel to initiate the combustion ,cng for the main power
see here
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