Subframe connectors question

Suspension, Steering and Chassis

  1. MoparMark91

    MoparMark91 Well-Known Member

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    Alright guys well kind of have a debacle question going on so here it goes. So I had received from my dad some Mopar performance subframe connectors for my 71 dart swinger. Well I pulled my car into the shop to put it on the lift so we could weld them in. So I know right off the bat it was a little out of alignment but I figured I'll work with it well we got everything mocked up and clamped. Only thing I really didn't like was the rear of the connector would not go all the way up. It is about a half inch from the connector being bottomed out on the frame. I see the reason it didn't is because the bar was hitting the floor pan preventing it from going up anymore, so my dad insisted that it would be okay so I welded it all up but there is a gap between the the bottom of the connector and the frame. Would this make a big difference? I know it don't look the beat so I'm debating on either a) try to cut free the connectors and start over. B) box it in with a plate on the backside and weld it?

    I'll post pictures tomorrow but it's been bugging me since yesterday and I feel like cutting it back out is going to be a bitch
     
  2. Jadaharabi

    Jadaharabi FABO Gold Member FABO Gold Member

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    I think you want the weight of the car to be on the ground leveled on all 4 corners not hanging in the air.
     
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    • MoparMark91

      MoparMark91 Well-Known Member

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      Yeah so probably going to have to take the cut off wheel or plasma cutter to it damn it the directions showed to lift it by the frame
       
    • Oldmanmopar

      Oldmanmopar Going left turning right FABO Gold Member

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      Your OK as long as the car was level. That gap you have between the floor worked out good on my Duster. I ran the Park brake cable above the frame tie. I saw the US tool style. and thought about the brake cable because the are formed to the floor. They would be good for a race car . I wanted to keep the parking brake. You'll be OK. I welded mine in on the lift years ago . It was easy for an old guy. Doors still worked perfect and the car launched straight wheels in the air.

      I have a Valiant coming . Race car went to a race shop. Paid big money for made stainless fenderwell headers. The cut the down tubes off under the hood. They had it on the ground and welded new down tubes in. When he went to pick the car up the right rear slick was flat. They pumped it up and the right front tire came off the ground. After going to look at the car to repair it we saw they even had to make two different length down tubes. And still didn't know the tire was flat.

      so setting the car on the ground is not always the best. Jack stands under the rear are not good either when you have super stock springs . My car leaned hard to the left with those springs. we are making a 108 and 111 rack out of Mario Andretti's Sprint car frame straightener to put these A-bodies cars on now. We went to 3-n-1 Race weld in Nazareth Pa. and bought it just for this reason. I really think you'll be OK as long as your lift isn' bent bad.

      Steve 054.JPG

      20191103_170341 (1).jpg

      20191103_170417.jpg
       
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      • MoparMark91

        MoparMark91 Well-Known Member

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        The spot I'm talking about is like this in the picture the rear of the connector isn't bottomed out to the frame, I have about a half inch gap. The car sits level and everything it's just I couldn't get it to hug the frame up any higher

        Borrowed picture for example

        20190120_115005~2.jpg
         
      • Tooljunkie

        Tooljunkie King of cobble/master of the broken bolt FABO Gold Member

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        I wouldnt have welded it until i was happy with it. Have a buddy that is same, good enough!
        Its something that is going to bug you,may as well make it to your satisfaction.
        My car, my decision.
         
      • Jadaharabi

        Jadaharabi FABO Gold Member FABO Gold Member

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        Look at the gap in these pictures.

        When I say on the ground I'm not saying on the tires. I'm saying to level up the car parallel to the ground on all four corners.

        quick subframe connectors question | For A Bodies Only Mopar Forum
        quick subframe connectors question

        Omm
        Got passed by an Andretti Motorsports semi truck this afternoon out on the interstate.
         
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        • diymirage

          diymirage HP@idle > hondaHP@redline

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          hey!
          i was quite happy with the way those came out

          i guess the make of the connectors is important
           
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          • j par

            j par Well-hung Member

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            well it looks like the deed was done. Myself personally I just couldn't see paying hundreds of dollars for a straight piece of metal but I had to weld in anyways. I spent $40 and went down the steelyard and bought a piece of straight metal.
            But to the point mine hit the floor boards before they went flat across and I went ahead and push them up against a floorboard and maybe denting in the floorboard just a hair bit and welded along the floorboard. Kind of a stitch weld a couple inches on this side then a couple inches on that side... Of course you would want to take the front seats out and the carpet LOL...
             
          • Jadaharabi

            Jadaharabi FABO Gold Member FABO Gold Member

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            Was not being derogatory or negative. I was using it as an example Was just saying for him to look at how that was done.
             
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            • diymirage

              diymirage HP@idle > hondaHP@redline

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              thanks

              thats why i think it is important to know who made the ones hes working on
              if hes got US cartools, they need to sit tight
              but if they follow the design i went, well, those dont support the floor in the same way so it become a moot point
               
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              • MoparMark91

                MoparMark91 Well-Known Member

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                Yeah see so those ones have the exact gap mine have! So is that a crucial big deal?
                 
              • Craig Burriss

                Craig Burriss Well-Known Member

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                My USCT connectors had fitment issues and I tried to get them to work better with cutting and grinding for a while but ended up just welding them in. I think as long as they’re welded a few inches, every few inches, they’ll be fine. I haven’t had any trouble with them, just don’t look at them haha
                 
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                • Garethw

                  Garethw Mopar. Because rocket science is too easy.

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                  Made my own from 2x3 steel tubing. They hit the front end of the rear frame rail before they hit toward the rear, caused a small gap at the end. I welded them up this way and didn’t worry about it. This was an early A though so might a little different for you.

                  F395E440-7D07-41A4-B30A-78685892CF5E.jpeg

                  B9EE5B70-2942-464B-8075-78A9E797F3C6.jpeg
                   
                • MoparMark91

                  MoparMark91 Well-Known Member

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                  Yeah that's like the same issue I have, I might just be overthinking it too much, I could always make a little plate to block the rear gap but it's hugged up really tight and car is straight as can be. I'm going to take picture once I get home from work and post them but it might be alright
                   
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                  • MoparMark91

                    MoparMark91 Well-Known Member

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                    Yeah I didn't have to relocate the cable either I was able to just run it over top but I might be alright it's not a huge amount and I made sure it was on as much as it can go and it's really sturdy to. I was able to feel the difference a little when I drove around the block after. Main thing was the floor pans were preventing it from coming up any more
                     
                  • MopaR&D

                    MopaR&D Nerd Member

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                    I had a similar issue with homemade subframe connectors made of 2" x 3" box tubing. I ended up putting a jack under the back end of the connectors and pushing them up flush against the rear frame rails before I welded them in. In my mind once they're welded in and the jack is let down it puts a constant tension on the connectors to kind of "pull" the front and rear subframes together. I do have a slight raised area in the floor in front of the back seat now but it's barely noticeable unless you're looking for it.
                     
                  • Kendog 170

                    Kendog 170 Let the boy go !

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                    I too use 2x3 Tubing and jacked tight on frame and plug welded rear floor.

                    8.jpg

                    10.jpg

                    11.jpg
                     
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                    • MoparMark91

                      MoparMark91 Well-Known Member

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                      Here are the pictures guys don't judge lol and the weird part of welding these in also is for some reason even with clean metal at certain parts it was giving me a hard time and had to up the gas a little but anyways u can see in one of the picture why I couldn't get it to hug up more tdue to the bar hitting the floor pan in the middle

                      IMG_20200730_060450.jpg

                      MVIMG_20200730_060425.jpg

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                    • ChuckDock

                      ChuckDock FABO Gold Member FABO Gold Member

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                      It's funny because I just installed Moroso sub-frame connectors and the directions specifically say to put the car up by the frame and let the rear axle dangle.
                      I did not do that. I feel like I would have panel issues once I let it down. I had the car up by the wheels and installed them. It worked out good. Doors didnt change how they open or close.
                       
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                      • Kendog 170

                        Kendog 170 Let the boy go !

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                        I let my suspension hang on my convertable because I had tighter top door gaps. I Carefully measured and tacked in. Then sat down on suspension to check door gap. I was very nervous but got both door gaps perfect.Then I finished my welding. Normally I would not do this. I did not let suspension hang when I did my Hardtop.
                         
                      • kursplat

                        kursplat FABO Gold Member FABO Gold Member

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                        so you have a little place for water to drain out of. i understand if it bugs you, but i don't think it's worth all the work to cut them out and reweld them
                         
                      • ChuckDock

                        ChuckDock FABO Gold Member FABO Gold Member

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                        That makes sense to me. Sounds like it worked out well for you doing it that way.
                         
                      • diymirage

                        diymirage HP@idle > hondaHP@redline

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                        thats what i did, just cut a little plate, weld it in to close the gap and call it good
                         
                      • Jadaharabi

                        Jadaharabi FABO Gold Member FABO Gold Member

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                        Have you been hanging out with Tom Hanks? I see his friend under your car.
                         
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