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Ideas on fuel line plumbing b

Discussion in 'The Hokey Ass Message Board' started by Devin, Mar 14, 2014.

  1. Devin
    Joined: Dec 28, 2004
    Posts: 2,433

    Devin
    Member
    from Napa, CA

    I'm installing my 3x2 intake and am not really happy with the way my plumbing looks. By the time I have the filter, pressure gauge and regulator hooked up to the log, the appearance is busy and convoluted. In a perfect world I would run the hard line directly into the gauge/ log. I can't see how I can incorporate the filter and regulator in a cohesive way. I'm using AN fittings for the hard line from the pump to log. For some reason I'm unable to rotate the outlets on the pump, the internal parts don't line up, I already tried. Hopefully, someone will see something that I don't. I thought about eliminating the fuel filter but I don't feel good about that. ImageUploadedByH.A.M.B.1394775574.169593.jpg ImageUploadedByH.A.M.B.1394775600.629463.jpg ImageUploadedByH.A.M.B.1394775626.010615.jpg


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  2. tommy
    Joined: Mar 3, 2001
    Posts: 14,756

    tommy
    Member Emeritus

    Eliminate the pressure regulator. They are sometimes needed for 97 carbs but never on your Rochester carbs. They came stock on Chevies with no regulators and the same fuel pump. It is not needed. I put the filter down on the frame before the pump. No dirt is created after that point. Mostly it is there to catch any dirt that is introduced at the gas station. I sometimes put it back at the tank.
     
  3. flathead4d
    Joined: Oct 24, 2005
    Posts: 898

    flathead4d
    Member

    Agree on getting rid of the fuel pressure regulator. The one you have is not very reliable anyway. It looks like you may have progressive linkage on the carbs. I would get rid of that also and go with straight. A lot less trouble. JMO
     
  4. 1971BB427
    Joined: Mar 6, 2010
    Posts: 9,838

    1971BB427
    Member
    from Oregon

    Pressure gauges and regulators go together. Can't have a regulator and not a gauge to see where it runs. I personally wont run any setup without a regulator, as I've had carb issues that ended up being pressure related, even with factory type mechanical fuel pumps.
    I went nuts trying to figure out why my buddy's carb kept flooding out, and a new carb did the same. I finally decided I'd put a gauge on the output of the stock mechanical fuel pump and found it ran almost 9 lbs. pressure! Put in a regulator and gauge, and adjusted it down to 4.5 lbs. and he's not had a bit of carb trouble in two years.
    By the way, that cheap regulator you've got is prone to uneven pressures. Had one once and I could look at it when the engine was cold or hot, and got 1-2 lbs. different readings.
    If you do decide to eliminate the pressure regulator, take it out and leave the gauge so you can see how much pressure the pump makes before running without a regulator.
     
  5. BootleggerMatt
    Joined: Aug 17, 2011
    Posts: 258

    BootleggerMatt
    Member

  6. Devin
    Joined: Dec 28, 2004
    Posts: 2,433

    Devin
    Member
    from Napa, CA

    Thanks guys. I don't feel comfortable running without a regulator as I had problems getting an edelbrock carb to run correctly. I was hitting 7-9psi and once I installed the regulator and kept it at around 4 psi. Everything worked great. I do have a nice inline filter before the pump, I just thought it couldn't hurt to be on the safe side and have another between the pump and carb.


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  7. mike bowling
    Joined: Jan 1, 2013
    Posts: 3,559

    mike bowling
    Member

    Isn't that an Offy regulator from" His Speediness" ? Looks just like one I got- price wasn't cheap, but it does look kinda ****py for having the " Offy" name on it.Is there a town in Mexico called Offy? Nice job on the line bending. I put a fuel filter down under the car on the main line to the carbs, and one between my fuel cell and electric pump.Can't have too many with the **** they call gas these days.Glad your regulator works; hopefully mine will too! Good luck
     
  8. bgaro
    Joined: Sep 3, 2010
    Posts: 1,189

    bgaro
    Member

    i have mine in about the same spot, only i have a big 'ol generator sitting above it. hides things nice. what a bout a firewall log. will that change anything.
     
  9. The thing is, if you use a regulator you want to be able to see it. Here's what I did, filter at the tank, filter ahead of the regulator and the Rochester filters in the fuel inlets. I run an in tank electric pump that pumps a steady 10 psi, so I need the regulator, and I have it set at 4.5 psi. I also like the look of three rubber fuel lines from a firewall block. I think what you have looks fine.
     

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  10. Get that POS regulator out of there, you'll be happy with a better one in a less in your face location.
     
  11. Devin
    Joined: Dec 28, 2004
    Posts: 2,433

    Devin
    Member
    from Napa, CA

    No doubt. It seems like the consensus is that half sy ditch the regulator and filter and the other half say go for it. Lol I just don't want to **** around when I go to break my engine in.


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  12. You could come up with something better, I can tell just by looking at the rest of it.
    Even if you rerouted and needed a longer line. Don't loose the filter though.
     
  13. ago
    Joined: Oct 12, 2005
    Posts: 2,198

    ago
    Member
    from pgh. pa.

    Devin,

    Run the filter and a better regulator down near the pump, It won't be as obvious. Don't rely on a liquid filled pressure gauge, when the engine warms it will read wrong. The liquid in the sealed gauge warms up it changes the reading. I drained the fluid out of mine and it read better.


    P.S. Put that picture of your avatar in the fuel tank, It will scare all the **** out of your tank!! ha, ha,


    Ago
     
  14. Devin
    Joined: Dec 28, 2004
    Posts: 2,433

    Devin
    Member
    from Napa, CA

    Never thought of the liquid gauge like that. Good advice!


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  15. Devin
    Joined: Dec 28, 2004
    Posts: 2,433

    Devin
    Member
    from Napa, CA

    Ok, I've got all the pieces to re plumb, but before I do, I wanted to know if it's ok to install the fuel pressure regulator (Holley 1-4psi) upside down? I plan on routing the regulator and filter underneath the fuel pump which will be mostly out of sight, then running a single line to the fuel block. This should be much cleaner looking.


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  16. Devin
    Joined: Dec 28, 2004
    Posts: 2,433

    Devin
    Member
    from Napa, CA

    Better! ImageUploadedByH.A.M.B.1395291931.058584.jpg ImageUploadedByH.A.M.B.1395291947.175910.jpg ImageUploadedByH.A.M.B.1395291966.058586.jpg ImageUploadedByH.A.M.B.1395291990.142855.jpg

    The regulator and filter are now hidden underneath the fuel pump. From what I understand, it's better to have the regulator close to the carb, but this is better than nothing.


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  17. clem
    Joined: Dec 20, 2006
    Posts: 4,697

    clem
    Member

    Looking tidier now, I have a similar setup and in pic 2 used a right hand bend straight upwards - saved a couple of bends in the pipe. For what it is worth my new 5lb fuel pump puts out 9 lbs, so used a regulator.
     
  18. Devin
    Joined: Dec 28, 2004
    Posts: 2,433

    Devin
    Member
    from Napa, CA

    Yeah that loop at the bottom bugs me a little bit. If I bent it upwards it interferes with the lower radiator hose. I made the line out of aluminum fuel tubing and have plenty more to mess around with. I tried making it out of stainless but I could not prevent it from kinking. I packed the tube with salt etc. and still struggled. Maybe later but this should be good for now. I plan on supporting the aluminum tube with clamps to protect against vibration.


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