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Thread: Duel fuel back to petrol conundrum

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    Question Duel fuel back to petrol conundrum

    Hi all,

    Wondering if anyone has converted their duel fuel (LPG/petrol) systems back to petrol only? If so, what did you do?

    Did you:
    - find an original tank and put it back in to have 2 tanks?
    - put in a long range tank (LRA or brown Davis) and get rid of the sub?
    - buy a new replacement tank and keep the sub?

    Also, did you run it so that one tank fills the other or run it as 2 seep rate tanks in case one split somewhere along the way?

    Rather than spend 1k on fixing my gas issues I am going to put the $ towards converting back to petrol only. Have heard many different scenarios and am confused now (for a change) ... Interested in hearing from you guys.

    Cheers, dave
    dave's 4x4 trips
    93 GQ Maverick with fun stuff

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    Patrol God threedogs's Avatar
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    First strip out all the GAS bits, including wiring.
    I'd probably put a long range in it, as now there are
    a few floating around on Ebay and similar
    Not sure how its done Yendor may know but the "NISSAN"
    system is ok, pumping fuel to one tank from the other.
    what about just pressing a button choosing the tank you want.
    You wouldn't need that with a 150 ltr replacement tank.
    Last edited by threedogs; 23rd February 2013 at 12:25 PM.
    04 ST 3lt auto, not enough Mods to keep me happy, but getting there

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    Patrol God taslucas's Avatar
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    Re: Duel fuel back to petrol conundrum

    I'm guessing you've got a GU?
    With all the GQs I've seen the normal original petrol tank stays the same and an lpg tank is added.
    So step one is just a case of removing the lpg tank, and piping etc.
    If you wanted a longer range then step two would be to fit a sub tank or a long range tank. There are a few different options for these depending on the manufacturers of the tanks.
    There are a few threads here regarding fitting a sub or long range. Sorry I cant post a link as I'm on the phone but a search should help.


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    Thanks heaps for the replies at 8am on a sat morn

    @ threedogs - I tend to agree with going the 150 long range an not mucking around with buttons and pumping. It's a hobby car and there for leisure so 1 less button to press is better I thinks

    @taslucas - i have a GQ. From what i can tell, the 1st owner had a main tank with a sub. The second owner had the main replaced with gas so I am left with a gas tank and the sub (60ltr?). I am thinking LRA 143 ltr atm and ripping the sub out but am not 100% sure if this is the best way. I will do another search on the forum.

    I guess I am trying to gauge what others have done and if it worked for them. Cheers
    Last edited by Ducer; 23rd February 2013 at 08:57 AM.
    dave's 4x4 trips
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    Patrol God threedogs's Avatar
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    @ Lucas do they remove the bigger tank and just leave small 35 litre job???
    If you source all OE bits it would cost you next to nicks, plus you'll know its fits
    @ lucas its a 93 MAV
    Last edited by threedogs; 23rd February 2013 at 08:54 AM.
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    I kind of agree threedogs. I am starting to think that getting an original good nick tank, new sender unit and leave the sub in there, run hoses and occasionally press a button while I'm away. Is there any cons with doing it this way? How many litres were the original tanks?

    Even if I had 120 liters in total it would still give me 600+ kms. No?
    dave's 4x4 trips
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    Dribble Master Clunk's Avatar
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    Re: Duel fuel back to petrol conundrum

    Generally petrol GQs don't come with a sub tank, they just have an 80/90lt tank at the rear.
    When they convert them to gas, they usually replace that rear tank for the log tank and put in a belly sub tank on the drivers side......

    Why not keep your sub and get a long range one as well, you've already got a switch in place to switch between the two tanks....... so hopefully will be able to use that

    Is there such a thing as RTI..... Repetitive Tapping Injury?????


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    threedogs (23rd February 2013)

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    Patrol God threedogs's Avatar
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    So a petrol GQ with 90 ltr tank thinking tops 450 Ks range
    150 ltr tank costs what $600 2nd hand complete, maybe 800 K range
    Maybe other members on petrol can be more accurate. Longest road in Aust between fuel ??
    Excluding Simmo or Canning maybe 600 K between servos ,
    Downside as I see it as its alot of fuel in one tank if you cop a stone through the bottom of tank
    Upside is now you can work on making the mighty MAV more fuel efficient ,with extractors etc
    thats M2cW

    Just had idea to save you heaps, PM me for contact details. Brown Davis only throw out old tanks
    might be able to pick up std tank dirt cheap
    Last edited by threedogs; 23rd February 2013 at 01:07 PM.
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    Re: Duel fuel back to petrol conundrum

    What engine mate. I know the r
    4.2's have the pump on the engine so no need for a pump. Just a pick up and sender unit.

    Imo the long range mains with the fat ass thing hanging off the bottom is a bad idea.. the sit down level with the bottom of the diff...
    A much better option going 2 tanks, this way you get a much better drop off angle and reduce the risk of putting a hole in the only tank you have...
    I've seen blokes rip gas tank shields off on easy tracks, and those long rage tanks hang lower than gas tanks...

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    You buggers you here lies the conundrum... everybody's logic is sound but all totally different.

    As you guys have said, i dont want to risk ripping a hole in the only tank in the middle of nowhere or not carry enough fuel... Want to avoid Jerry cans if I can. I haven't actually seen a long range on but so far the consensus is to avoid.

    Engine is a 4.2 Westy and yep, i will need to get a sender unit because the last owner probably threw it out when going to gas. Are they easy enough to come by?

    Clunk, do you mean run the tanks separately so that when one is empty, you switch over to the other? If so, it makes sense because if you do get a rock in one tank, i guess you can still use the other? If you were pumping from tank to tank and one got a hole in one, are you still in strife?

    So... Do you guys think this would be an ok plan?

    - Replace the 90ltr gas with a 90-100 ltr petrol, that way the tank doesnt hang low.
    - keep the sub (60ltr?) in place
    - run the two tanks separately in case on gets a hole in it (not pumping from one to the other)

    This would give me about 150-160litres which as threedogs mentions, will get me roughly 800 on open roads probably less in the bush.

    Thanks again for your help guys.

    cheers, Dave
    dave's 4x4 trips
    93 GQ Maverick with fun stuff

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