Crosswind air gap clone and ram truck serpentine setup

Magnum Engine Swaps

  1. mopower76

    mopower76 Well-Known Member

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    Looking back on your findings, what was your ultimate outcome with the 91 style front drive system?
    Cost just doesn’t seem that much especially if you are in my shoes and have to replace the factory truck compressor anyway.
    Used x wind intake - $150
    91 front drive @ U Pull - $50
    Reman compressor - $160 (Rockauto)

    I paid $345 ($299+shipping and a bad attitude on the phone) for a MP M1 intake from Indy Cylinder Head that was advertised at $199... so that set up is really tempting and probably the way I will go on the next ones.

    Also, thanks so much for all of your research and pictures! Very well done!
     
  2. 75slant6

    75slant6 FABO Gold Member FABO Gold Member

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    I wasn’t the one who was messing with the 91 dakota stuff. That would’ve been @Bobzilla
     
  3. mopower76

    mopower76 Well-Known Member

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    Oh man! So sorry!

    So @Bobzilla ... Same question!

    This is a great thread, I’m sure I’m not the only member that really appreciates the lengths @Bobzilla and @75slant6 have gone to (among others) to help all of us looking for a solution.
    Thanks again guys!
     
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    • Bobzilla

      Bobzilla Well-Known Member

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      Sorry I have not finished with the 91 Dakota bracket yet. Been busy lately.
      I will try to make time to get the broken bolts removed tomorrow and do a better mockup, to see how it sits. I will post photos when I get it set up again.
       
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      • Bobzilla

        Bobzilla Well-Known Member

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        Dual pattern intake with LA-style thermostat housing, factory Magnum heads and timing cover, and the 91 Dakota AC bracket. I don't have a 91 Dakota AC compressor, and the later Magnum compressor from a 99 Ram truck does not have the same bolt patter in the rear, so this one is only lining up with two front AC compressor mounting holes.
        This radiator hose is from a 99 Ram. It comes close to the AC compressor bracket, but it does clear, and looks like a passenger side radiator connection is possible.
        IMG_20190310_165518.jpg IMG_20190310_165706.jpg IMG_20190310_165532.jpg
         
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        • Bobzilla

          Bobzilla Well-Known Member

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          IMG_20190310_165500.jpg IMG_20190310_165454.jpg
           
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          • mopower76

            mopower76 Well-Known Member

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            • Bobzilla

              Bobzilla Well-Known Member

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              Still not sure which compressor will work though. By part numbers, and best I can tell in the Dakota pictures I took, the Dakota uses 6 rib serpentine belt. The Magnum engines use a 7 rib belt. The questions continue.
               
            • JoesEdge

              JoesEdge Well-Known Member

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              So what's the trick? A '91 bracket? I see those in the wrecking yard all the time.
               
            • Bobzilla

              Bobzilla Well-Known Member

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              Not sure when I'll get to the junk yard again, but I need to find an AC compressor that will fit the 91 Dakota bracket.
              If there is a compressor with same mounting bolt pattern AND the 7-rib pulley in the correct position, this will work.
               
            • 1994redram

              1994redram FABO Gold Member FABO Gold Member

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              I had a set of underdrive pullies on my magnum several years ago. I couldn't find a 7 rib belt in the size I needed. I ended up with a 6 rib that fit great. Never had a single problem with it.
               
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              • mopower76

                mopower76 Well-Known Member

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                It looks to me like fabricating a bracket to attach the rear holes of the compressor to the bracket itself wouldn’t be all to elaborate.
                This set up sure would have saved me a lot of money, more parts hunting and I know time is money. I’m guessing this set up could have been a $200-$300 savings over going the route I went if not more.
                 
              • JoePole1

                JoePole1 A dude in a B body FABO Gold Member

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                Hi Guys. Do you know if there is a range of years for the 91 Dakota AC/Alt front bracket? Having trouble locating a 1 year only. Does it have to be from a Dakota only and does it have to be a V8 5.9 or can it be 5.2 or V6 for that matter?

                Thanks
                 
              • Bobzilla

                Bobzilla Well-Known Member

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                The bracket in my previous posts was from a 91 Dakota with and LA 318 that I found in a junk yard. That is the only one I have ever seen with this bracket. Not sure what other engines may have had it.
                 
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                • JoePole1

                  JoePole1 A dude in a B body FABO Gold Member

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                  Thanks Bob. You wouldn't happen to have the stamped number easily accessible on your serpentine bracket set-up would you?

                  Started doing interweb searches on LA Dakota A/C serpentine hoping that there may be a small range of years. I checked 1990-1994 Dakota and RAM 5.2 and 5.9. Here are some pics from Car-Parts database. What I found is that this is a one year 1991 Dakota 5.2 ONLY mount.
                  Not trying to take credit for Bobzilla's, Slant76 and 74sport time and efforts. I just wanted to widen the search criteria if possible.

                  1990 Dakota- V8 not offered.

                  1991 Dakota- This is the one we want per what Bobzilla's hard work has shown. A/C compressor high up giving clearance. Radiator hose routing correct.
                  upload_2020-1-18_13-10-2.png

                  1992 and 1993 Dakota have the same arrangement for both years. RAM is similar. You can see that the AC compressor is mounted lower and the AC lines mount more to the right side. Also notice the upper Radiator hose routing direction.
                  upload_2020-1-18_13-12-37.png
                   
                  Last edited: Jan 18, 2020
                • Bobzilla

                  Bobzilla Well-Known Member

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                  Looks like the casting number on that 91 Dakota bracket is 53006580.
                  Anything with a full multi port fuel injection Magnum engine should NOT have this one. This was a transitional deal to get throttle body fuel injected LA based engines into Dakotas with serpentine belt setups.
                   
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                  • JoePole1

                    JoePole1 A dude in a B body FABO Gold Member

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                    Thank you Bob!!!! Having that part number is going to be a huge help. Cheers.
                     
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                    • JoePole1

                      JoePole1 A dude in a B body FABO Gold Member

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                    • 75slant6

                      75slant6 FABO Gold Member FABO Gold Member

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                      Hey everyone, today, I finally messed around with my serpentine ac bracket and an extra LA 318 that I have. I came up with a few potential solutions to enable the use of A/C with a crosswind style intake. Now first, let me just say, I’ve only eyeballed this and haven’t starting doing any actual mods.

                      Ok, first off, both options are going to require cutting off that one corner of the bracket that interferes with the t-stat housing. In option 1, cut the corner (red line in pic 2) then add material (aluminum weld or jb weld) to the “groove” beside that bolt hole, then drill and tap that. (Yellow spot in pic 2). Next, cut off the factory bolt hole on the ac compressor (red line pic 3) and drill out the hole just forward of the original hole (yellow dot/arrow in pic 3)
                      ECB1663F-60B1-4108-AB67-15CF239C3B7D.jpeg 73B0D319-060E-4D5B-98BD-FCC08AEF9CD7.jpeg 2E40D6C4-88C1-4580-BEBB-7C27EDC0AA25.jpeg

                      Oh, now option two, cut off that one ear, then making a steel plate, that bolts to the remaining 3 holes, and add 4 holes/nuts to the plate that offset the compressor toward the drivers side of the engine by 1/4-1/2”.
                      Option 2 would obviously raise the intake a 1/4” or so but shouldn’t cause any problems as far ask clearance goes. I’m planning to try these out in the coming weeks so I’ll keep y’all posted on any results. If someone beats me to it, please post your results!
                      74452867-C1F4-41D2-9B4B-5336E854907E.jpeg 3F4AD3C0-91B5-4A24-BD6C-47BA1EAD57BE.jpeg
                       
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                      • JoePole1

                        JoePole1 A dude in a B body FABO Gold Member

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                        Nice work Slant.
                         
                      • 65dart360

                        65dart360 Well-Known Member

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                        I put a 318 magnum in my 85 d150 with crosswinds intake ( what I had laying around ) and kept the serpentine belt setup and a/c. I did option 1 that 75slant6 suggested and used a 70 dart 340 with ac thermostat housing to get the hose away from the compressor. Will take pics this weekend
                         
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                        • 65dart360

                          65dart360 Well-Known Member

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                          Ok got a few pics my compressor doesn’t have the extra mounting hole. My plan was to leave a little of the one I cut down and then make a bracket from that to somewhere else on the front bracket. However I will probably just get a new compressor with the extra bolt hole and do as 75slant6 described. Also the upper radiator hose is kind of at a odd angle with the thermostat housing being pointed to passenger side. I plan on taking the truck to the local parts store and looking through all the hose to find one that works without having a splice in it like the current one.

                          823BE660-9CCD-4EBF-A344-68D34C1D78EE.jpeg

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                          • 75slant6

                            75slant6 FABO Gold Member FABO Gold Member

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                            Well shucks. I just realized tonight that I use this port (pic stolen from the original post in this thread) for my temp sender for my water temperature gauge! So that just added another hurdle to my setup. I wasn’t planning on doing this swap any time real soon but I noticed Saturday that my mechanical fuel pump is leaking, so I may as well swap to the magnum front cover and run an electric pump.

                            02050BAB-52DE-4CA6-8352-881BC8E801D4.jpeg
                             
                          • mgoblue9798

                            mgoblue9798 Well-Known Member

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                            Not sure if it will help you or not, but the accessory bracket and a/c compressor are different and I think smaller on a Ram 1500 van. If you can't make yours work maybe see if the van one can be used.
                             
                          • triumphman

                            triumphman FABO Gold Member FABO Gold Member

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                            A simple solution; get an Edelbrock Air Gap. It all works together on the Magnum. click on my avatar, it shows how is designed to fit.
                            Good luck regardless.
                             
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