Subframe Connectors by Competition Engineering

Discussion in 'Suspension, Steering and Chassis' started by Garys72Duster, Jan 9, 2019.

  1. Garys72Duster

    Garys72Duster Well-Known Member

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    Has anyone used these connectors? P/N C 3115 at Summit. 1970 Dart. They are about $40 less than the Mopar Perf units. They are a bolt in, with 6 bolts per side. I wonder 1) If they are strong enough? 2) Should they be welded in, after installation? To make it more rigid. Does that help? 3) How do you remove the undercoating around the weld areas? Heat it with a propane torch, and then scrape it off? All suggestions, comments are appreciated, . Thanks!
     
  2. thesiren74

    thesiren74 Well-Known Member

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    Thats what i have, i welded them in using a plate on the front to give it more strength. There are better ones but mine were free.
     
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    • Bad Sport

      Bad Sport HALF A BUBBLE OFF Staff Member FABO Gold Member

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      I haven't myself.

      In my mind welded is better than bolted.

      Yes.

      With that said, you can buy your own material, cut to fit and weld them in. I put a set in my car for 40 bucks and a little work.

      There are numerous threads on this subject, at least 2 right now up and current. You can get some good ideas there for making your own. Of course you'll need a way to cut them, and then to weld them in.
       
    • Garys72Duster

      Garys72Duster Well-Known Member

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      Yes I have considered that. Still need a welder, though. I can Bolt these in, then take them to the local muffler shop for welding. He does great work!
       
    • Bad Sport

      Bad Sport HALF A BUBBLE OFF Staff Member FABO Gold Member

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      If I were doing that I might not bolt them in.

      Weld them right out of the gate using the bolt holes in the connectors for plug welding.
       
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      • roccodart440

        roccodart440 Well-Known Member

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        Mine are bolted and welded.
         
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        • j par

          j par Well-hung Member

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          Yes there's many threads going now and again I say it and every one of them by the time by those $209 frame connectors you can buy an $89 Harbor Freight welder$35 Harbor Freight helmet $5 Harbor Freight gloves of $15 Harbor Freight cutter grinder and the $30 for the material to make the frame connective. Still under the original $209 frame connectors that once you bolt them and you want to weld them anyways.
           
        • Garys72Duster

          Garys72Duster Well-Known Member

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          Yes, I was looking at a Harbor Freight welder on sale for $95! 125 amp, welds up to 3/16 inch steel. It's a flux core wire feed. Would this get the job done? Haven't welded for 30 or more years. But welding is like riding a bicycle, right? You never forget how. LOL. Also found out my Dart Custom is a 111 inch wheelbase. I was shocked! All this time I thought it was a 108, but I measured it. Must have grown longer while sitting in my garage! Ha! Seems to be some misinformation from the parts warehouses as to what years and models are 108 or 111. Any clues on the various A body models wheelbase length?
           
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          • j par

            j par Well-hung Member

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            I think I paid less for mine and it's done everything under the sun. I mean don't get me wrong when I weld in my roll bar and I borrowed my uncle's good welder. But for the little jobs it's almost better than gas because you can really just make it very mobile.
             
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            • Garys72Duster

              Garys72Duster Well-Known Member

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              Time and energy are limited, so I just ordered some Mopar Perf bolt in connectors. They are 1.5" by 2". The Only ones bigger are the Hotchkiss weld ins for $60 more. 1.5 by 2.5. So a half inch wider. At least I can get these things bolted in, then weld them at a later date. My 7.5 to 1 RV 440 doesn't hardly torque the frame right now, anyway. Once I get a Hi Output 451 in there, and bigger tires, then I'll need them welded in for sure.
               
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              • Garys72Duster

                Garys72Duster Well-Known Member

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                Also, the 108 " wheelbase bolt ins made by Competition Engineering, won't fit my 111" car. Only MP has a bolt in for the 111". Hotchkiss has the best one, for $280. Ouch! Weld ins, made in the good ole USA! I like theirs the best, but pricey.
                 
              • j par

                j par Well-hung Member

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                HOLY SMOKES? I JUST LOOKED UP HOW MUCH THOSE COST!

                So have you read the installation instructions on those?
                 
              • j par

                j par Well-hung Member

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                Did you read the two reviews from Jags? For the Mopar performance a body bolt in frame connectors?
                 
              • Garys72Duster

                Garys72Duster Well-Known Member

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                I've read the reviews on Summit. Looked good. I'll look them over when they get here, he said i can return them if I don't like them. I didn't like the fact that the Mopar performance ones aren't painted, but I can do that. I got them for $217 from Summit, including tax and shipping. If I was younger, probably would have gone with build my own. But now at 67, I have more money than energy. LOL
                 
              • Garys72Duster

                Garys72Duster Well-Known Member

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                I have read the installation instructions for all 3 brands. The MP ones were very limited, and could have had more detail. The Comp Engineering ones were priced around $175 last week. Price went up.
                 
              • j par

                j par Well-hung Member

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                I've never drilled The Sixteen holes underneath the car that will allow you to start putting bolts in, but it seems like by the time you got all those holes drilled in perfect and straight....
                Lol anyways, holding them up there to mark all the holes, drill the holes while laying on your back and having your arms extended up in the air and holding them up there why you try and get the bolts in LOL I always laugh when people pay all that money they're going to jump out of the box and install themselves...LOL
                 
              • 318willrun

                318willrun Stomper 4x4... we kept energizer in business

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                instead of scrapping metal, start making frame connectors and sell them right here on FABO. All these threads, there is a market. Say, 70 bucks shipped 1.5" x 3"
                 
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                • Garys72Duster

                  Garys72Duster Well-Known Member

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                  Looks like 4 bolts per side, total of 8 for both sides. Reviews all said installation was fairly easy.
                   
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                  • j par

                    j par Well-hung Member

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                    Remember all those bolts go through double wall? It's in the wall then 3in. later another thin wall. Make sure you're bit is very parallel so your bolts aren't crooked.
                     
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                    • j par

                      j par Well-hung Member

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                      It's 1 and 1/2 by 2 and 1/2 and I couldn't rip people off like the Chinese do. It's simply a 4-foot piece of Steel. I thought some of the value was in the powder coating LOL not even that on these Mopar performance ones.
                       
                    • pro451bee

                      pro451bee New Member

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                      If you just bolt them in , get some 2 inch spacers into the frame so you can tighten the bolts without crushing the frame rails , like the trans cross member bolts. A good hardware store has them or cut your own from thick wall 1 inch tubing. There are drain holes in the frame rails , and use a flexible magnet to fit them into place. May have to open up drain holes some with dye grinder.
                       
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                      • Garys72Duster

                        Garys72Duster Well-Known Member

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                        Good point, pro451! The Comp Engineering ones come with crush sleeves. Couldn't understand why they were needed, now I see. I'll do that. I was going to buy theirs, until I measured my wheelbase at 111". They only make theirs for 108" wheelbase. They are priced now at $205!