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Post by danie on May 14, 2010 17:53:47 GMT 2
Hi Ari / Ronnie
According to your comments under another post Ari's Lada has been fitted with a 2 nd fuel tank.
Do you perhaps have more detail or pics of the extra tank ?
Regards
Danie
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Post by ronnie on May 14, 2010 18:12:12 GMT 2
Hi Danie
I fitted the extra fuel tank when Ari`s Lada was new. At that time it was available from the agents. It fits in place of the silencer.If you use a pump for each tank you need to also fit non return valves on each tank. On Ari`s I used electrical valves but a good quality mechanical one should be OK. I have already started looking for a suitable tank. Toyota TUV is too wide. Need to go to scrap yard and browse.
Regards
Ronnie
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Post by Ari Bezuidenhout on May 14, 2010 18:54:41 GMT 2
Hi The first pic shows the switches on the dash one of which switches on an electrical pump to move fuel from the back tank(65L) to the main tank(42), the second shows the edge of a metal protection plate/box under the tank which can be seen under the bumper. The last 2 show the 2nd fuel cap near the right rear taillight Ari
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Post by ronnie on May 15, 2010 9:46:46 GMT 2
Hi Ari
If the 65 l tank now pumps into the 42l tank it has been changed as I had each tank pumping individually. It is not a good idea to pump a large capacity tank into a small one due to the possibility of overflowing. It used to have 2 pumps to the left of the tank along with electrical solenoids to prevent back feeding between the tanks. The return to tank line was blanked off.
Regards
Ronnie
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Post by Ari Bezuidenhout on May 15, 2010 13:37:18 GMT 2
Hi Ronnie
The system I'm running now is that the return flows into the main tank(42L). The electrical pump moves fuel from the 2nd tank(65L) to the main tank via the switch on the dash. When I am transfering fuel I just keep an eye on the gauge of the main tank. The mechanical pump moves fuel from the main tank(42L) to the engine.
Ari
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Post by danie on May 15, 2010 14:42:18 GMT 2
Very interesting mod.
I assume a mod like that will cost a fortune nowadays.........
Danie
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Post by ronnie on May 15, 2010 15:23:33 GMT 2
Hi Danie
I am sure it will cost plenty now like every thing else. It is a long time ago but I think i simply fed the carb from one tank or the other. One electric pump for each with no return line.
Regards
Ronnie
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Post by ronnie on Sept 11, 2010 19:52:06 GMT 2
Hi Danie I see Pioneer Plastics sell a fuel tank which looks very similar to the one I fitted to Ari`s Lada. It is 60 liters and is 840mm long x 360mm wide x 220mm high. It has an inlet and outlet connection. The only thing with fitting these tanks, because of the box section where the bumper leg fits, the filler connection intrudes slightly into the load bay. I can`t remember if I covered Ari`s but it would not be difficult. Anyone doing this I would defiantly recommend 2 electric pumps and non return valves after each pump. The pumps cannot be installed under the bonnet as you will get vapor lock. I know from experience . I eventully fitted the pumps beside the main tank under the small drop in pocket. Ronnie
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bobbyd
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Post by bobbyd on Sept 12, 2010 11:29:45 GMT 2
I have built a long range tank out of a 2nd hand LPG tank,I knocked off the tank from under the deck of a isuzu ute so I got the mount brackets too. I put a fitting in the bottom which the new fuel line connects to and bored a 75mil hole in the top and welded on a short extension with a filler cap on. the fitting on the bottom simply has a short hose with a connector/shut off valve which all boaties with outboards have, the type with the squeeze bubble on, the other half is connected to a longer fuel line which presently tees in to the original fuel line with a on/off valve in each line, I just manually select which tank I want to use and the engine driven pump does the rest. This is still in prototype stage, ie the manual selector is all wrong, The tank is in the rear luggage space so I cant carry much more stuff, tank is presently venting inside, the tank is strapped down with a motorbike tiedown strap, etc etc
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Post by ronnie on Sept 12, 2010 13:37:06 GMT 2
Hi Bob
I assume you have vehicles powered by LPG to be able to get a tank. No LPG fueled cars here. The problem with 2 tanks is the return to tank line. You either do away with it, or spend a fortune on 12 volt solenoid valves. When I install the second tank I prefer to go to electric pumps as it is easier to control. For anyone installing a second tank, be warned electric pumps will back feed through each other. Either use solenoids or non return valves.
Ronnie
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Post by ronnie on Sept 12, 2010 15:34:46 GMT 2
Hi All
If you want to use the existing mechanical pump you can do it with 2 solenoids. You still need to do away with the return line. You might be lucky to get a solenoid valve at the scrap yard as the after market alarm installers used them to cut the fuel off.
Ronnie
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Post by Charles on Sept 12, 2010 19:05:50 GMT 2
Hi all I have seen a couple of 2nd fuel tanks fitted to different vehicles. Most of them have a t-piece fitted to the filler neck so that first the main tank and then the 2nd tank will fill with fuel. (2nd tank is higher) Then there is a fasset pump fitted from the 2nd tank to the main tank. The breather of the main tank then gets routed to the top of the 2nd tank. So if you leave the pump running when the main tank is full, the fuel will just run back to the 2nd tank thus preventing fuel from overflowing. On some systems there is a trigger switch with a float fitted to the main tank that switches the pump off when the main tank is full. This system works very well and is very simple in design.
Charles
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bobbyd
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Post by bobbyd on Sept 14, 2010 15:36:54 GMT 2
Ill get some photos when I make it presentable, another project first!
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spikes
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Post by spikes on Aug 20, 2011 14:18:47 GMT 2
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Post by ronnie on Aug 20, 2011 15:30:38 GMT 2
Hi Spikes
The 60 ltr fuel tank they sell is the same as the one that used to be available for the Niva.
Ronnie
PS I have been told that a tank from a 120Y datsun also fits?
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Post by marius on Aug 20, 2011 16:44:54 GMT 2
Just an idea, but how about mounting an extra fuel tank on the roof carrier (like Ari's above) for when you do long distance traveling. You can just fill up the normal tank from your extra tank with a well secured flexable hose. You will just have to protect the hose and the tank from hooking on something whilst traveling in the bush (i.e. rear mounted hose). May well be a cheap alternative Marius PS - patent pending ;D ;D ;D
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Post by Charles on Aug 20, 2011 16:56:49 GMT 2
Hi Marius
It will make the car very top heavy and also what do you think will happen if you roll it??
Calla
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spikes
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Post by spikes on Aug 20, 2011 19:06:17 GMT 2
May well be a cheap alternative Marius PS - patent pending ;D ;D ;D[/quote] Sorry Marius, We beat you to that one way back in June of 1965 travelling back to George from Warburton after the College winter work break. Only difference was we had a 20l can of Jeripigo on top of the Zephyr's roof rack. Those days heaters in cars were few and far between ;D
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Post by marius on Aug 20, 2011 20:19:34 GMT 2
Hi Charles I do agree that there is some risk involved but wouldn't a couple of jerry cans do the same As far as top heavy >> again I do agree with you but that would anyway be the case when you pile a bunch of things on your roof carrier I have seen many Land Rovers with loads that could turn it over at the slightest side slope but it doesn't stop them from doing so. In my opinion many of those things fitted on the roof are there only because it looks cool and nothing else. I mean who needs all of that on a trip to the mall I quite like the idea of a detachable fuel tank on the roof carrier. It is cheap and simple and you only use it when you need it. Marius
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Post by marius on Aug 20, 2011 20:20:50 GMT 2
Spikes I think I like your idea even more! ;D Marius
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Post by ronnie on Aug 21, 2011 9:53:52 GMT 2
Hi Marius and Charles
I would advise against using a tank on the roof rack and rather use jerry cans. With a tank you have all the weight in one place, with jerry cans you can spread the weight, 3 one side in the middle and 3 the other side. The reason you will see some vehicles at the mall laden is they are basically holiday vehicles being given a run (at least that was the only time mine went out except on holiday). It is totally impractical to unload all the time. I reduced the 6 jerry cans on the roof to 4 by fitting extra tanks underneath. (on the Landy). Jerry cans can stand the pressure build up in the sun I am not so sure about a tank. Ronnie
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Post by marius on Aug 21, 2011 10:38:56 GMT 2
Hi Ronnie/Charles I am in no way qualified to give an educated view on this matter - so please take everything I am saying with a pinch of salt. My feeling is that if you fit a fuel tank near at the rear of the roof rack spanning from side to side across the rear axle you should not have too much issues with weight distribution I suppose you can easily insulate that tank from the sun. The main issue for me would be safety. Marius
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Post by Charles on Aug 21, 2011 18:54:12 GMT 2
marius I would feel much safer by having the tank under or even maybe inside the vehicle. The jerry cans is much smaller so the fuel sloshing around will not have such a big effect. It will be a different story in a 60 liter tank. Take a 20l bottle and fill it 3/4 of the way with water and shake it side to side. You will seee what I mean. With jerry cans you can either keep the full or empty. With a tank bigger than your fuel tank that is not possible. So you will have 20-30 liters sloshing about on your roof. That will be fatal. Also fuel stored in a container is at its most volitile when the container is close to empty as the gasses then has room to build up in.
Calla
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Post by marius on Aug 21, 2011 19:43:13 GMT 2
Well as I said - it is just an idea Marius
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