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Thread: Fuel Tank - Help

              
   
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    Fuel Tank - Help

    hey guys in the last week I changed the fuel pump and I removed the left side fuel sender to clean a little bit. so after I put all in this place I fill the tank and my problems starts
    when I put gas in the tank only the right side of the tank ( the side of pump is located) have gas, the other side who have only the fuel sender level is empty all the time :S, I read some about fuel siphon but I confused, if someone have opinion is appreciated
    thanks for all and sorry for my english Click here to enlarge

    Marcos

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    you must have disturbed the suction jet pump assembly, or didnt put the siphon hose in correctly to the tank.
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    thanks for the replys, but again I have problems with pump :@
    now I want to change that s*** cause the pump has gone again, so thinkin in the future project for turbo engine I will put a decent pump, dont know in tank pump or no ( I think the in line pumps are better? I dont want to remove that pump again), what you think?
    so, maybe a aeromotive stealth 340? do you know what mods I will made to fit?
    remmember I will run on E85 and will change the fuel lines and fuel pressure regulator

    thanks alot

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    I'm telling you- if you want PROBLEM FREE use a weldon pump.

    I'm using a 2025, with their pre/post filters and their fuel pump controller. it is *THE* way to make it happen correctly.
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    nice! weldon pumps are the best but I think the 2025 is to much for me, what you think about A2005-A or A600-A?
    i'm confusing in how to install this pumps, I need a catch tank or I can just drop the pump in the lower of the car and use the stock place to take fuel?

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    Search for me and E85. i did a complete rundown of my fuel system
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    ok, thanks

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    I found some pictures, but I dont know how you do, you use stock location or make a hole in the tank for take the fuel? and the return?
    sorry for alot of questions, because I live in Brazil and I do not know anyone who tune or mod bmws, again thanks alot

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    Click here to enlarge Originally Posted by Twinturbom3
    This quote is hidden because you are ignoring this member. Show Quote
    You look like a retarded teenager discovering internet.

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    This is what I originally had. It sucked. It was EXPENSIVE. I burned up 4 pumps because the 044's kept clogging/cavitating/sucking.


    thats why I went to the Weldon. Its in the spare wheel area now.
    Attached Images Attached Images         
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    Now, the system is this:
    entire fuel system is plumbed with Earl's Prolite 350 hose and Earls ano-tuff fittings.
    Weldon 2025 fuel pump in the trunk
    Weldon 14000 fuel pump controller with boost activated switch @ 2 psi of boost via hobbs switch
    Weldon pre filter (40 micron) post filter (10 micron) located in spare tire wheel well. Spare tire still fits.
    Fuel safe road/rally surge tank in the passenger side of the tank, -10 line sippy line cut at about a 30* angle through that aluminum cup that I made, -10 line from the tank to the pump, -8 to the fuel rail
    -10 fuel rail custom made with $#@!in' billet mounts
    2000cc Injector Dynamics fuel injectors
    13101 Aeromotive fuel pressure reguator.
    fuel pressure regulator is 1:1 ratio with vacuum/boost.
    -6 back to drivers side via bulk head through the cap, split to -4 and twin E36 modified syphon jet pumps- both that dump into the surge tank.

    So far, I seriously have tried to starve the car for fuel- side/side, long pulls, braking, corning.... fuel pressure never sways. it has proven to be super solid.
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    this is what I have in mind!
    you buy this cups and syphon or fabricated? nice! pics says more than 1000 words!
    thanks alot
    I will work on the car weekent and I post some pics!again thanks

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    We whipped up the fuel tank cup in the machine shop.
    The siphon jet pumps are factory E36 m3, but two of them
    The surge tank is from fuel safe. THAT is really fun getting into the fuel tank Click here to enlarge
    Click here to enlarge
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    I can't imagine how you put that into the tank heheh
    I'm searching in fuel safe website, you model is the ST100E right?
    I think I will need made a custom surge cause if I ship to brazil it will cost at last 2x the price in the site xD


    thanks

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    another one, if I cut a hole in the stock fuel pump and place a 8an hose, just drop in the tank, and put a dual 044 in the floor, before the stock fuel filter, the pump will got power to pull gas from the tank? I will remove the stock fuel lines, and filter.
    I uploaded a picture to show where I want cut, or I can made a custom cup to place in the tank with just two an holes but what I do with fuel sender?



    Click here to enlarge

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    im telling you, if you are going big power, screw all that crap. twin 044's dont even fit in the hole- you have to throw everything in the tank and assemble it inside the tank. It sucks. . I have a "special pillow" set up so i can basically lay there and do heart surgery through a 4" hole. it SUCKS. again.

    besides making DEPENDABLE power/ground/fuel level sensor wiring go through the cap, that factory wiring will burn up.
    you need to put a relay and run directly from the battery- using the fuel pump wiring as the trigger for the pumps now. 10g wiring, 30amp fuse. mine was behind the right side seat bolster. (now the fuel pump controller does all of this)
    my fuel pump controller is near the gas tank actuator, behind the panel. boost reference is in the glovebox where my hobbs switch is..... it runs my fuel pump controller and air compressor to turn on/off under boost. adjustment for the controller is where the green pull cable is supposed to be coming out of the right trunk trim. that way if i needed to, i can adjust the PWM of the controller easily.

    the factory surge tank is too small for large volume. i ripped that out and have the fuel safe surge tank in there. take it apart and roll it into a tube and get ready for some arm pump lol


    I've been in that damn side of the tank so many times, my head hurts.
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    Marcos,
    If you want an easy dual pump solution try:
    rallyroad.net/content/rally-road-e36-bmw-dual-fuel-pump-hanger

    Just purchase two pumps you would like to use.

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    thanks again, and sorry for the delay, work is killing me, I will do what you say so instead of spare wheel I can put the pump under the car?
    so my question is, I can put a fuel pump under the car using the stock fuel line location? what I say is the tube going of the tank for the top
    the pump will suck de fuel or I need to put the pump more above, on the level of the tank thanks again
    @Jajou
    thanks for the answer but I really dont want a internal pump again

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    in the trunk.
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    ok I will do this
    I will post some pics of the progress thanks alot

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    hey guys what you think
    my friend have one surge tank like this http://www.aliexpress.com/store/prod...088491919.html
    ( its a little big) if I keep the stock in tank fuel pump feeding the surge and after the surge I put the dual or single 044? I measured and all fits in the spare wheel! so the return the cell go the stock returns and all works, or not?
    big thaanks Click here to enlarge

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    Looks fine?
    @alex@ABRhouston
    Click here to enlarge Originally Posted by Twinturbom3
    This quote is hidden because you are ignoring this member. Show Quote
    You look like a retarded teenager discovering internet.

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    you could try it i guess. I would use the stock pump to that tank, then the return from the fuel rail to it as well- then an overflow hose back to the stock return line position on the left side......
    The problem is, you will not have reliable return VOLUME to the left side of the tank- which is where the syphon jet pump is......

    or you can just do it the way I told you and it works.


    I have 3 fuel safe surge tank check valves I'd LOVE to get rid of as well. Never used.
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    hm, how you put two syphon pumps? just a T inside the tank? what is this check valves?

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