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LPG, CNG & LNG - General Info and Issues Share experiences and problems |
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What to warm up manually to switch to gas quickerViews : 4345 Replies : 30Users Viewing This Thread : |
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Nov 28th, 2010, 10:45 | #11 |
Allons-y!
Last Online: Jun 8th, 2020 16:32
Join Date: Dec 2004
Location: Winchester
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Honestly it's just not worth worrying about, cars use more fuel when it's very cold and take longer to warm up, simple as that. Your only realistic options to genuinely cut down the warmup time are an engine pre-heater or keeping the car in a heated garage overnight both of which will cost way, way more than just letting the engine do it's thing.
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Nov 28th, 2010, 18:16 | #12 |
VOC Member
Last Online: Yesterday 22:29
Join Date: Jun 2006
Location: Selby, North Yorkshire
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Thinking about it, there is one obvious, 100% guaranteed way of saving petrol..............just leave the car at home and walk!
This afternoon my teenage daughter and I got wrapped up in winter togs and boots, and instead of driving to the local supermarket to get some glue for her homework project, we walked. And it was great! It was snowing heavily, and we easily outpaced the slow queue of traffic along the road as we walked. Also we talked - really talked. When's the last time you had a conversation with a teenager that was more than monosyllabic shrugs? We got some fresh air, and the cup of coffee when we got home was the best I'd tasted in ages! Cheers Jack |
Nov 28th, 2010, 21:37 | #13 |
Trader Volvo in my veins
Last Online: Today 00:48
Join Date: Dec 2004
Location: Anglesey
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A engine pre heater is the only realy way in your situation to get the engine to run on LPG from start. With older type mixer systems on classic engines it is possible to start from cold. With modern injection systems it is also possible to start on LPG with some but not all and many engines managment systems will get thrown by running from cold on LPG. The distributor systems are quite fussy and best only used on a warm engine
The big advantage of the pre heater is reduced engine wear. Most engine wear occours during cold running. |
Nov 29th, 2010, 09:56 | #14 |
Premier Member
Last Online: Yesterday 23:43
Join Date: Oct 2010
Location: Bristol
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I've just noticed this part of the forum
As an LPG owner I'm kicking myself for not seeing this LPG section earlier.
Anyway, here I am, proud owner of a self-converted 340 which works well on LPG. I thought I'd make the observation that our system starts well from cold, even freezing cold. Don't ask me how, our settings are not rich, all we have to do is give it a shot of gas (9 seconds), full choke (not that it makes any difference) then it roars into life. Within half a mile it is half choke, and a full mile it is at temperature. We keep the petrol for special occasions. (Like valve lube additives etc.) I have a complete install diary inc. photos if anyone is interested. |
Nov 29th, 2010, 16:50 | #15 |
Not an expert but ...
Last Online: Yesterday 10:11
Join Date: Dec 2001
Location: Boncath
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Joe, you seem to be starting on a mixture of gas and petrol?
You give it a shot of gas, then full choke, then get the choke in after a mile. I'm puzzled. |
Nov 30th, 2010, 09:09 | #16 | |
Premier Member
Last Online: Yesterday 23:43
Join Date: Oct 2010
Location: Bristol
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Quote:
It is necessary to pull out the choke to allow full gas to flow through the carb. With the choke fully out, after usually one shot of gas, the car starts, even though the vapouriser is stone cold. After that, the vapouriser heats quickly, (being heated by the primary cooling circuit) then normal operation takes over. Choke in within 1 mile. At no time do we need petrol to get it started, although with nighttime temperatures as they are I'll be ready to try it if the gas does let me down. Hope this is clearer. |
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Jan 3rd, 2011, 02:36 | #17 |
Member
Last Online: Oct 2nd, 2020 22:16
Join Date: Dec 2002
Location: Retford , Notts
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also youll find that you can gas start most multipoint lpg kits by holding the lpg switch on as you switch the ignition on and crank it.
I found this out the other day when i was telling someone about the time 2 years ago when i ran out of petrol in deep snow and had to walkk 3 miles for petrol!!!! Much to this guys joy he told me all about it and was laughing
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Jan 3rd, 2011, 08:39 | #18 |
Not an expert but ...
Last Online: Yesterday 10:11
Join Date: Dec 2001
Location: Boncath
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It is said that most engine wear takes place in the first 2 miles when it is cold and petrol is washing the oil off the cylinder bores. Also the combustion products from the rich poorly-burnt mixture contaminate the oil, contributing to corrosion and wear.
LPG is supposed to be much cleaner running, but I don't see how it can achieve this if the engine is in fact running on petrol for those critical first few miles. |
Jan 3rd, 2011, 19:31 | #19 |
Junior Member
Last Online: Sep 30th, 2011 11:29
Join Date: Nov 2010
Location: Marmaris
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My 960 3.0 24v switches to LPG as soon as I get the engine over 2500RPM regardless of running and ambient temperatures. The system is a standard single point LPG system as well.
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Jan 19th, 2011, 22:43 | #20 |
Missing the point
Last Online: Feb 6th, 2023 00:12
Join Date: Nov 2001
Location: Stoke-On-Trent
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My 1986 Audi 100 with a carb runs on gas from cold, even during the really cold last few months, it does have a mixer ring though.
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