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Sending unit float direction.

Discussion in 'The Hokey Ass Message Board' started by grf-x, Jul 15, 2012.

  1. grf-x
    Joined: Jul 15, 2010
    Posts: 299

    grf-x
    Member

    Plenty of post in fuel sending units and floats. I couldn't find anything I was looking for.

    I have a 1951 ford custom 4 door. A bob drake repop of the original tank. and an after market fuel sending unit/float.

    Okay... my stupid arse forgot to make note of how the fuel sending unit was installed in my tank.

    I am referring to direction the float is pointing in relation to the tank itself. I have a repop bob drake tank.

    The filler neck is on the driver side near back. The sending unit is driver side toward the front. I am leaning more toward pointing it to tea of car since the location of the sending unit is more toward the front. Is this correct?

    Thanks.
     
  2. 325w
    Joined: Feb 18, 2008
    Posts: 5,748

    325w
    ALLIANCE MEMBER

    I wouldn't think it makes a difference as long as the float is not hitting the side are a baffle inside.
     
  3. Don's Hot Rods
    Joined: Oct 7, 2005
    Posts: 8,319

    Don's Hot Rods
    Member
    from florida

    It is best to orient the arm of the sender so it runs sideways in the car as opposed to fore and aft. The reason is, as you accelerate and slow down the sloshing of gas can make the arm move up and down if it is facing fore or aft, but having it sideways takes some of that tendency out of it.

    At least that is what I was always taught and heard.

    Don
     
  4. Exactly......In fact there was another post on HAMB that discussed why the guys gas gauge was fluctuation so badly on acceleration. Turned out that he had mounted the sending unit with the float arm parallel with the center line of the car
     

  5. odins701
    Joined: Aug 9, 2008
    Posts: 390

    odins701
    Member

    Ditto on that! If your left or right of center, aim towards center sideways.:)
     
  6. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,475

    landseaandair
    Member
    from phoenix

    Maybe if the sender is mounted near the center. I think his is more foreward and should point the float straight back which would put the float near center.
     
  7. grf-x
    Joined: Jul 15, 2010
    Posts: 299

    grf-x
    Member

    All of you have really great points. On another forum I posted to... some one pointed out that the screw hole are not equally spaced and the alignment of said holes would dictate the way it supposed to be pointing. I have not tested this yet. I am out of the garage tonight, spending time with my son. I will update when I have a chance to verify. Thanks to all for replying.
     
  8. odins701
    Joined: Aug 9, 2008
    Posts: 390

    odins701
    Member

    i've seen that a lot.
     
  9. JohnEvans
    Joined: Apr 13, 2008
    Posts: 4,883

    JohnEvans
    Member
    from Phoenix AZ

    Yes the senders normally have 1 offset hole so can only mount one way.
     
  10. landseaandair
    Joined: Feb 23, 2009
    Posts: 4,475

    landseaandair
    Member
    from phoenix

    I thought about that too but you mentioned an aftermarket sender, so I assumed it could be positioned at least 5 different ways.

    I'm pretty sure the factory positioned it with the arm pointing rearward.
     
  11. grf-x
    Joined: Jul 15, 2010
    Posts: 299

    grf-x
    Member

    Since I am replacing the sender with a brand new unit, it would indeed be aftermarket. Positioning it rearward... well there is definitely room that way. after the boy goes to bed I am going back out to the garage and check. Gunna break out the digital caliper and check measurements between each hole just out of curiosity sake.
     
  12. odins701
    Joined: Aug 9, 2008
    Posts: 390

    odins701
    Member

    just rotate the gasket, you'll see the offset
     
  13. Sending units,gaskets,and tank mount holes are made to align only one way...There's an SAE spec number for that.Can't recall where I saw it but ,I ran into it when I was searching for a tube-type sending unit & gaskets.
     
    Last edited: Jul 15, 2012
  14. grf-x
    Joined: Jul 15, 2010
    Posts: 299

    grf-x
    Member

    Okay, i have verified... the holes have to line up and there is not mistaken that it only aligns one way. So that was correct. This puts it pointing to the rear but at an angle. Thanks all. I appreciate it.
     

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