Pump It Down....EASY

Discussion in 'Suspension, Steering and Chassis' started by MrJLR, Jun 18, 2016.

  1. MrJLR

    MrJLR Built, not bought FABO Gold Member

    Messages:
    3,563
    Likes Received:
    1884
    Joined:
    May 14, 2015
    Location:
    Chino, California
    View My Photos
    Local Time:
    2:03 AM
    While I'm waiting for some parts to get my engine back in, it was the perfect opportunity to do the "Pump It Down " modification to my power steering pump.

    Already off the engine made it easier but still easy while in the car.

    In the vise
    20160618_200546_zpshw8l704m.jpg

    Valve assembly out...
    20160618_200621_zpsr4tcuzrl.jpg

    Stem disassembled

    20160618_201145_zpsl6tdblaf.jpg

    Little. 016 shim....
    20160618_201235_zpsmasis3o8.jpg

    I'm lucky to work in a machine shop. ...made up some washers...
    20160618_201330_zpsu6uazkjc.jpg

    Stacked together. ...
    20160618_201410_zps8nrahpqf.jpg

    Then just reassemble. ....
    Honestly. ...it's easier than falling down drunk!

    Jeff
     
    • Like Like x 4
    • 74.Dodge.Dart.S

      74.Dodge.Dart.S Well-Known Member

      Messages:
      98
      Likes Received:
      2
      Joined:
      Sep 21, 2015
      Location:
      Idaho
      Local Time:
      3:03 AM
      What are some of the symptoms you have that make this mod worth doing to fix it?
       
    • Lustle

      Lustle Well-Known Member

      Messages:
      1,394
      Likes Received:
      539
      Joined:
      Jul 26, 2015
      Location:
      Lethbridge
      Local Time:
      3:03 AM
      Not so much "symptoms" as it is how the power steering is on certain A bodies. Gives them a "light" "disconnected" feeling between the steering and the road. The problem is the pump is too strong. Makes the steering floaty feeling. That's how I can best describe it. But it's odd. Makes it more difficult to center and point the car. To cut/carve corners. You feel separated from the front tires. This mod is designed to be a half way point between over the top power steering and terrible in parking lots manual steering. Gives you a lot of that manual feel on the road. While still having the ability of power steering. It's a recommended mod for anyone doing serious corner driving in their car. As far as I understand it. I haven't done it yet, but its on the list.
       
      • Like Like x 1
      • Agree Agree x 1
      • MrJLR

        MrJLR Built, not bought FABO Gold Member

        Messages:
        3,563
        Likes Received:
        1884
        Joined:
        May 14, 2015
        Location:
        Chino, California
        View My Photos
        Local Time:
        2:03 AM
        It just lowers the the power steering pump pressure making the steering feel tighter.

        Jeff
         
      • moparmat2000

        moparmat2000 FABO Gold Member FABO Gold Member

        Messages:
        9,310
        Likes Received:
        1416
        Joined:
        May 13, 2010
        Location:
        Grand Tetons
        View My Photos
        Local Time:
        4:03 AM
        Yup yup. Article in a mopar magazine talks about this. The pumps are way overboosted on the V8 cars giving a disconnected feeling. This is way cheaper than using a custom borgeson GM type steering chuck in your mopar. An alternative to machining your own spacers to drop the pump pressure is to get one of the valve assemblies from a slant six car and swap it to your V8 pump. The saginaw pump in a slanty runs a lower pump pressure than the V8 car possibly due to it being lighter by maybe 200 lbs.

        Also using C body idler and pitman arms which are a little longer than A body arms and will increase the steering ratio as well. (T/A challenger trick) this sets the centerlink back a little bit more than stock. Possibly a problem with headers, and only goofs up the ackerman angle when the steering is at full lock.
         
        • Like Like x 1
        • Agree Agree x 1
        • 67autocross

          67autocross A new iron curtain drawn across the 49th parallel

          Messages:
          840
          Likes Received:
          296
          Joined:
          Jul 23, 2010
          Location:
          Winnipeg
          Local Time:
          4:03 AM
          I think Bergman Auto sells the spacers for under $20 for those who can't make some themselves.
           
        • gerty

          gerty Well-Known Member

          Messages:
          622
          Likes Received:
          68
          Joined:
          Aug 3, 2004
          Location:
          Burkesville,Ky.
          Local Time:
          4:03 AM
          How about just using a /6 pump and swapping out the brackets? I'm putting a small block in my Duster so I already have the pump and brackets.
           
          • Thanks! Thanks! x 1
          • Ben Drinkin

            Ben Drinkin Off the Wagon.. FABO Gold Member

            Messages:
            16,112
            Likes Received:
            7440
            Joined:
            Sep 15, 2013
            Location:
            West Texas
            View My Photos
            Local Time:
            4:03 AM
            Is this the same for a Federal pump?
             
          • moparmat2000

            moparmat2000 FABO Gold Member FABO Gold Member

            Messages:
            9,310
            Likes Received:
            1416
            Joined:
            May 13, 2010
            Location:
            Grand Tetons
            View My Photos
            Local Time:
            4:03 AM
            Pulley may be different, then you got to swap em. I think saginaws take a special puller/installer tool. Easier to mod the valve on the V8 pump
             
          • moparmat2000

            moparmat2000 FABO Gold Member FABO Gold Member

            Messages:
            9,310
            Likes Received:
            1416
            Joined:
            May 13, 2010
            Location:
            Grand Tetons
            View My Photos
            Local Time:
            4:03 AM
            I think they are different.
             
          • 72bluNblu

            72bluNblu FABO Gold Member FABO Gold Member

            Messages:
            8,442
            Likes Received:
            2435
            Joined:
            Nov 28, 2008
            Location:
            NorCal
            Local Time:
            2:03 AM
            They're completely different. I have heard that the federal pump can be modified to lower the pressure, but it's a different procedure than the Saginaw.
             
          • jeffnmo

            jeffnmo Just another Mopar Maniac FABO Gold Member

            Messages:
            415
            Likes Received:
            187
            Joined:
            Sep 5, 2010
            Location:
            south carolina
            Local Time:
            5:03 AM
            I did it to my Federal pump not to lone ago, You just have to take off the tank to get to the pressure valve, I added two washers from an old pump for a total of three and it was a night and day difference for the better.

            Jeff
             
            • Thanks! Thanks! x 1
            • MrJLR

              MrJLR Built, not bought FABO Gold Member

              Messages:
              3,563
              Likes Received:
              1884
              Joined:
              May 14, 2015
              Location:
              Chino, California
              View My Photos
              Local Time:
              2:03 AM
              Glad to hear it was worth it! Really firmed it up huh?!

              Jeff
               
            • jeffnmo

              jeffnmo Just another Mopar Maniac FABO Gold Member

              Messages:
              415
              Likes Received:
              187
              Joined:
              Sep 5, 2010
              Location:
              south carolina
              Local Time:
              5:03 AM
              Sure did, I wasn't expecting that much change, well worth it and so simple to do and best off all it was FREE!

              Jeff
               
            • toolmanmike

              toolmanmike FABO Staff Staff Member FABO Gold Member

              Messages:
              28,287
              Likes Received:
              10350
              Joined:
              Jan 18, 2006
              Location:
              Iowa
              View My Photos
              Local Time:
              4:03 AM
              Anybody have any diagrams as to what it looks like inside?
               
            • MrJLR

              MrJLR Built, not bought FABO Gold Member

              Messages:
              3,563
              Likes Received:
              1884
              Joined:
              May 14, 2015
              Location:
              Chino, California
              View My Photos
              Local Time:
              2:03 AM
              Pictures in first post.....or are you looking for something different?

              Jeff
               
            • toolmanmike

              toolmanmike FABO Staff Staff Member FABO Gold Member

              Messages:
              28,287
              Likes Received:
              10350
              Joined:
              Jan 18, 2006
              Location:
              Iowa
              View My Photos
              Local Time:
              4:03 AM
              Sorry, Federal pump.
               
            • MrJLR

              MrJLR Built, not bought FABO Gold Member

              Messages:
              3,563
              Likes Received:
              1884
              Joined:
              May 14, 2015
              Location:
              Chino, California
              View My Photos
              Local Time:
              2:03 AM
              Oh.....I misunderstood....

              Jeff
               
            • JoeSBP

              JoeSBP RLTW!

              Messages:
              935
              Likes Received:
              407
              Joined:
              Jun 16, 2015
              Location:
              NC
              View My Photos
              Local Time:
              5:03 AM
              best way to describe the feel is a car that doesn't have enough positive caster. I'll take strong arming to park over that any day!
               
              • Like Like x 1
              • toolmanmike

                toolmanmike FABO Staff Staff Member FABO Gold Member

                Messages:
                28,287
                Likes Received:
                10350
                Joined:
                Jan 18, 2006
                Location:
                Iowa
                View My Photos
                Local Time:
                4:03 AM
                My Swinger is typical loosie goosie. Yes a little caster would help or reduced pump pressure.
                 
                • Agree Agree x 1
                • 318willrun

                  318willrun Stomper 4x4... we kept energizer in business FABO Gold Member

                  Messages:
                  5,686
                  Likes Received:
                  2942
                  Joined:
                  Sep 13, 2013
                  Location:
                  I'm here
                  Local Time:
                  4:03 AM
                  A little off topic, but I always got my "firmer" feel by going manual. :steering:
                  40 lbs lighter, eliminates a belt, gobs more room on the drivers side, faster to pull or install the motor, ....... AND.... the firm feel :D
                   
                • R4Sedan

                  R4Sedan Life in the Fastback Lane FABO Gold Member

                  Messages:
                  3,376
                  Likes Received:
                  602
                  Joined:
                  Nov 26, 2009
                  Location:
                  Tampa, Fl
                  Local Time:
                  5:03 AM
                  I like. I'll have to do that to mine.
                   
                  • Like Like x 1
                  • Lustle

                    Lustle Well-Known Member

                    Messages:
                    1,394
                    Likes Received:
                    539
                    Joined:
                    Jul 26, 2015
                    Location:
                    Lethbridge
                    Local Time:
                    3:03 AM
                    I gotta do this to mine. She just has that loose feeling upfront. Like you just cant ever get it pointed. Hate it. Got the .890 bars right now. Going to get 1.03 bars and a nice swap bar front/back setup, new shocks, should totally change the ride.
                     
                    • Like Like x 1
                    • Ben Drinkin

                      Ben Drinkin Off the Wagon.. FABO Gold Member

                      Messages:
                      16,112
                      Likes Received:
                      7440
                      Joined:
                      Sep 15, 2013
                      Location:
                      West Texas
                      View My Photos
                      Local Time:
                      4:03 AM
                      Thanks Jeff. I have an old pump I can steal from...
                       
                    • toolmanmike

                      toolmanmike FABO Staff Staff Member FABO Gold Member

                      Messages:
                      28,287
                      Likes Received:
                      10350
                      Joined:
                      Jan 18, 2006
                      Location:
                      Iowa
                      View My Photos
                      Local Time:
                      4:03 AM
                      Yes thanks for the info Jeff.