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Anyone Using Baffles to help Fuel Starvation?

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    Anyone Using Baffles to help Fuel Starvation?

    I'd like to keep my stock tank location, but fuel starvation is a problem. Has anyone tried using baffles like the ones off-road guys use?

    Like these ones: http://www.alltechmotorsports.com/accessories.html

    My Dad used to use Wiffle Balls as baffles, but apparently they aren't made of the good material anymore, so they break down in the fuel, so these seem like the next best option. I know they won't completely stop the slosh, but maybe they will slow the transfer of fuel down.
    sigpicLevel Motorsport: www.levelmotorsport.com

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    #2
    Umm, how would you get the baffles in? The holes in the tank are pretty small, and to
    do any good, they'd have to either be fastened in, or big enough to wedge themselves in place... were you thinking of packing it full?

    I'd LOVE to be able to bladder, foam, and compartment the stock tank, but by that time
    the tank's 3 times as expensive as a cell...

    Have you looked at the late tank with 2 pumps in it? That seems like a pretty good
    'fix' if you don't need to run down to the last gallon or 2.

    t
    with an early tank, late pump, and a dislike of right- hand sweepers...
    now, sometimes I just mess with people. It's more entertaining that way. george graves

    Comment


      #3
      I have a late tank, but try to only run 3-5 gallons per session.

      The cool thing about those baffles I linked to is that you can crush them into a pretty small size and they open back up, so they will fit through the hole for the fuel pump and/or sending unit. I have a bag of them at my shop from a friend who does off-road endurance racing and rock crawling in a CJ. He tells me that you just put as many as you can fit into the tank, and they lock themselves together. They are designed so the weight to volume is far less than that of fuel, so you aren't adding much static weight.

      Also, I own a fabrication shop, so it wouldn't cost me too much to drop the tank and section it. I was actually considering just sealing the tank in the center, so the fuel stays on the passenger side only. I'm thinking that could balance the inequality created by me sitting on the other side of the car. I could put the car on the scales, add some ballast back there equal to fuel, and see how that would change the weight distribution.

      I want to keep the stock tank location not only because I can't afford a cell, but also because it is low and between the axles.
      sigpicLevel Motorsport: www.levelmotorsport.com

      Instagram: https://www.instagram.com/levelmotorsport/

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      Comment


        #4
        This is very interesting. Fuel starvation is killing me, I have to run with full tank all the time to avoid it.
        1990 e30 325is S50 swap (NASA GTS2 race car)
        1990 e30 325is
        1988 e30 M3 S50 euro swap

        Comment


          #5
          -buy a late dual sender tank
          -install a 325 pump in the drivers side
          -install a 318is pump in the passenger side
          -run the feed from the drivers side to the return on the 318is pump
          -run the feed from the 318is passenger pump to the body side feed line
          -install a toggle switch and relay for the drivers side pump
          -enjoy running your tank down less than 1 gallon and have zero starvation problems!

          Comment


            #6
            This - http://treperformance.com/FuelPumps/...FuelPumps.html in tank, no driver side fuel pump. Never had fuel problems after the install.
            sigpic

            2011 335i/1995 Mercedes C220 (rallyx)

            Comment


              #7
              you also have special foam for gas tanks, that also prevents fuel starvation. Thats easier and saver than welding in your gas tank
              In Marburg kann man sehr gut wohnen.
              Die Umgebung ist schön mit vielen Wäldern.

              Comment


                #8
                Originally posted by Gary Horneck View Post
                This - http://treperformance.com/FuelPumps/...FuelPumps.html in tank, no driver side fuel pump. Never had fuel problems after the install.
                We are talking about fuel starvation at the pump pick up, not fuel volume/ pressure at the rail. It won't matter how much your pump can flow if there is no fuel available in the "pot" for it to suck up.

                Comment


                  #9
                  Actually just bought surge tank set up from forum member here. Will report when installed.
                  1990 e30 325is S50 swap (NASA GTS2 race car)
                  1990 e30 325is
                  1988 e30 M3 S50 euro swap

                  Comment


                    #10
                    you also have special foam for gas tanks, that also prevents fuel starvation.
                    No, it just prevents explosion if the tank gets ruptured... fuel flows through the foam
                    pretty much as freely as through air.

                    Fuel cells have foam, yes- and multiple pick- up locations to prevent starvation.

                    t
                    now, sometimes I just mess with people. It's more entertaining that way. george graves

                    Comment

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