Tuning with twin maximum flow adjuster
in [Aussie Drivers]
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From: Noddy on 2 Dec 2007 15:40 "Yvan" <me(a)privacy.net> wrote in message news:5rfpqcF1494fcU1(a)mid.individual.net... > You think that it would be a good idea to connect a heater coolant into > vaporizer at the part 14 (smaller diameter hose connected here is for > carburetor autochoke heater) and output at the end of the hose 15 (it > is connected to inlet manifold). Currently I have two T-connectors at > the cabin heater hoses, and vaporizer hoses are connected there. > > > http://www.realoem.com/bmw/showparts.do?model=1051&mospid=47249&btnr=11_0744&hg=11&fg=35 I would connect the vaporiser in series at point 13 or 15 in place of either of those two original hoses. Do away with the T connectors and use a couple of hoses to connect the vaporiser in line in place of either hose 13 or 15 so the coolant flows directly through the vaporiser rather than being shared between the vaporiser and the original hose via a T-connector. > So to summarize I could start my engine at, say -15 Celsius. Standard > coolant pump pushing coolant the way I just described should do the > job? I can't see why not. -15 will not be cold enough to prevent gas flow and the engine from starting, and the quicker you get your vaporiser warmed up the happier it will be. -- Regards, Noddy.
From: Noddy on 2 Dec 2007 15:49 "Yvan" <me(a)privacy.net> wrote in message news:5rghavF14jat5U1(a)mid.individual.net... > I just did some testing (nice sunny weather today :-). I drilled small > hole near the top of the carburetor with a thread in it, and used a bolt > to fix choke plate in opened position. I can now start and run on lpg > from cold with spud pipes setup. I will have to test this again > tomorrow morning, it was warm outside today. Well done. > So I guess that with amos ring it must be even better. All else being equal, spud pipes would be the worst possible solution to getting gas into the engine. An Amos ring would be a dramatic improvement, and a complex mixer would be better again in order of magnitude. If you can get your minor niggles sorted out and come up with an Amos ring type mixer that works, you should have a reliable and well performing lpg system that will start & run regardless of the temperature. -- Regards, Noddy.
From: Yvan on 3 Dec 2007 02:36 Nedavno Noddy pi�e: >> I just did some testing (nice sunny weather today :-). I drilled >> small hole near the top of the carburetor with a thread in it, and >> used a bolt to fix choke plate in opened position. I can now start >> and run on lpg from cold with spud pipes setup. I will have to test >> this again tomorrow morning, it was warm outside today. > > Well done. Not actually :-( It was relatively warm yesterday, and the engine did not cool completely. This morning choke block did not make any difference. I could not start the engine, and it would not idle until it warmed up almost to the normal operating temperature. But not to worry, amos ring is at final stages of design, I just need to fabricate it :-) > If you can get your minor niggles sorted out and come up > with an Amos ring type mixer that works, you should have a reliable > and well performing lpg system that will start & run regardless of the > temperature. I hope so :-) -- ___ ____ /__/ / \ ** Registrovani korisnik Linuksa #291606 ** / / \/ /\ \ ** Registered Linux user #291606 ** /__/\____/--\__\ ** http://counter.li.org/ **
From: Yvan on 3 Dec 2007 02:36 Nedavno Noddy pi�e: > I would connect the vaporiser in series at point 13 or 15 in place of > either of those two original hoses. Do away with the T connectors and > use a couple of hoses to connect the vaporiser in line in place of > either hose 13 or 15 so the coolant flows directly through the > vaporiser rather than being shared between the vaporiser and the > original hose via a T-connector. I thought so. So that is next, I need to finish amos ring fabrication first. >> So to summarize I could start my engine at, say -15 Celsius. Standard >> coolant pump pushing coolant the way I just described should do the >> job? > > I can't see why not. > > -15 will not be cold enough to prevent gas flow and the engine from > starting, and the quicker you get your vaporiser warmed up the happier > it will be. I thought that was to cold for lpg start. It does not often get colder than that here. So, perhaps I can convert to lpg only, I do not need petrol. I was told that starting on lpg at low temperatures is bad for membrane in the vaporizer (converter), it shortens it's life. How often do you need to change this membrane? Mine is some 4-5 years old, and ~22000 km -- ___ ____ /__/ / \ ** Registrovani korisnik Linuksa #291606 ** / / \/ /\ \ ** Registered Linux user #291606 ** /__/\____/--\__\ ** http://counter.li.org/ **
From: Noddy on 3 Dec 2007 05:31
"Yvan(a)office" <me(a)privacy.net> wrote in message news:5rhq0fF14kqp3U2(a)mid.individual.net... > I was told that starting on lpg at low temperatures is bad for membrane > in the vaporizer (converter), it shortens it's life. Not that I'm aware of. As I mentioned earlier, it doesn't get as cold here in sunny old Melbourne (that's an in joke for the rest of the aus.cars readers) as it does in your part of the world, but I've never known lpg to have cold start issues in the 25 years I've been using it as a vehicle fuel. LPG is actually better than petrol through a carburettor in cold weather as it doesn't have the atomization issues petrol has in cold climates. > How often do you need to change this membrane? Mine is some 4-5 years old, > and ~22000 km Generally not very often, but it would depend largely on your vaporiser. I have two vehicles on lpg. One I'm just finishing converting to straight gas from a dual fuel system and the other that is dual fuel. The dual fuel vehicle uses all Impco gas equipment, while the straight gas vehicle uses an Impco mixer and an OHG vaporiser/converter. The dual fuel vehicle (a Jeep Cherokee) has done near on 180,000km's on gas with one gas adjustment in that time that I know of at the hands of it's previous owner, and in the three years I've had it the thing hasn't so much as had the gas system looked at let alone touched. It still runs as good today as when I first purchased it, with only regular vehicle servicing every 5000kms (when I remember to do it). I owned a Mitsubishi Express van that I put over 350,000km's on using nothing but lpg and the vaporiser was never touched in that time, and my father had three of the things in succession that all travelled around the same distance on lpg without any issues whatsoever. -- Regards, Noddy. |