Dual fuel tank setup help

Discussion in 'Set up tips Forum' started by Jarvy Oliva, Mar 22, 2016.

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  1. Mar 22, 2016 #1

    Jarvy Oliva

    Jarvy Oliva

    Jarvy Oliva

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    Newb trying to figure out how to properly connect the fuel lines between a Sullivan 12oz and a 4oz tank in my 1/8 scale hydro. Running ops 67. The 4oz is located by the carb and the 12oz is wedged next to the pipe (just past the midsection of the boat). Any advice will be greatly appreciated.
     
  2. Mar 22, 2016 #2

    Wesleys Custom Graphics

    Wesleys Custom Graphics

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    Pipe to the air in on the big tank. Fuel draw from big tank to air in on the cheater tank. Fuel draw on cheater to 3rd channel. 3rd channel to carb.
     
  3. Mar 22, 2016 #3

    Jarvy Oliva

    Jarvy Oliva

    Jarvy Oliva

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    Thank you! That makes sense. Does the fuel line lengths or id's matter? Currently using the "medium" size id from Dubro with some addition line slack on both ends.
     
  4. Mar 22, 2016 #4

    namba276

    namba276

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    How far is the main tank from the hopper tank? That will have an effect on fuel draw...and not too much "slack line" make it as short as you can. Hope this helps...

    Bob
     
    Last edited by a moderator: Mar 22, 2016
  5. Mar 22, 2016 #5

    David Ashcroft

    David Ashcroft

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    Use 5/32" brass on your tank's also will give a good fuel flow.
     
    Last edited by a moderator: Mar 22, 2016
  6. Mar 22, 2016 #6

    TimothyJones

    TimothyJones

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    The longer the lines the more pressure it needs to deliver the same volume than if the lines were shorter.

    I would say since its a .67 go with what David said. You may however get away with 3/32" for you pressure line.

    FYI ,Just enlarging the lines without doing the tank tubing doesn't work that well.
     
  7. Mar 22, 2016 #7

    Jarvy Oliva

    Jarvy Oliva

    Jarvy Oliva

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    Thank you all. I really appreciate the support!!
     
  8. Jun 23, 2016 #8

    Ray Sametz

    Ray Sametz

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    If you have two saddle tanks built do you install internal hoppers in both tanks?
     
  9. Jun 24, 2016 #9

    John Finch

    John Finch

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    Ray,

    If you use two saddle tanks same size the needle will change when the one tank empties. Your engine will go rich as the fuel is more easily drawn to the engine. If you use a hopper tank and one large tank the whole idea is to keep the hopper tank full at all times. That is why the hopper is a smaller tank and the needle does not change on you. Using hoppers in two saddle tanks will not cure that problem. Move to Virginia and we will help you out.

    John

    John
     
    Matt Krieger likes this.
  10. Jun 24, 2016 #10

    Ray Sametz

    Ray Sametz

    Ray Sametz

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    LMAO [​IMG] Thanks Professor. [​IMG]
     
  11. Mar 1, 2019 #11

    DickJones

    DickJones

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    SIMON SAYS< STAND ON YOUR HEAD FOR , 1o MINUTES< THEN LET ME KNOW HOW U FEEEEEEEEEELLLLLLLLLLL, PLEASE
     
  12. Jan 8, 2020 #12

    Green Meany

    Green Meany

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    where is the big tank located on right side hopefully as this will help with fuel flow when cornering as g force will want to make fuel go the left, if you have the tank on left it will be harder for the fuel to go from main to the header when cornering
     
  13. Jan 8, 2020 #13

    Joern Markset

    Joern Markset

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    A float chamber will solve all your problems.
     
  14. Jan 8, 2020 #14

    Grimracer

    Grimracer

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    Do you have room for just one tank? If so please consider...

    Enjoy.

    Grim
     
  15. Jan 9, 2020 #15

    Lee Whiteley

    Lee Whiteley

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    Hi Joern,

    I'm still pretty new to setting up a boat. With that said please explain how to setup and use a Float Chamber.

    A picture or two would be a great help as well.

    Thanks very much,

    Lee
     
  16. Jan 13, 2020 #16

    Hydro Junkie

    Hydro Junkie

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    If I understand what he's talking about, you use a one or two ounce tank between your main fuel tank and the needle. The idea is to keep your fuel pressure consistent, minimizing the need to use a remote needle during your run.
     
  17. Jan 13, 2020 #17

    Mark Anderson

    Mark Anderson

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    A float chamber is a small tank that the carb draws fuel from. It is kept full by the pressurized main tank or tanks. The float chamber has a float and needle/seat to regulate the fuel level in the chamber. The chamber is not pressurized.
     
  18. Jan 13, 2020 #18

    Hydro Junkie

    Hydro Junkie

    Hydro Junkie

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    That sounds like a description of a float bowl and float in a carburetor that is used in automotive or private aircraft applications
     
  19. Jan 13, 2020 #19

    Hydro Junkie

    Hydro Junkie

    Hydro Junkie

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    That sounds like a description of a float bowl and float in a carburetor that is used in automotive or private aircraft applications
     
  20. Jan 13, 2020 #20

    Hydro Junkie

    Hydro Junkie

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    That sounds like a description of a float bowl and float in a carburetor that is used in automotive or private aircraft applications
     

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