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1973 F-250 - Turbo BBF - It's alive!

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  • Re: 1973 F-250 - Turbo BBF - It's alive!

    Up doesnt work well with a BBF because the exhaust flanges are at a ~45 angle. That makes the outlet almost aim directly at the fender. Not sure if they will seal properly upside-down either. Haha.

    I think the turbo nearly *has* to go on the passenger side of the engine in order to get everything aimed the intended direction. The narrow-ish frame rails are going to make pipe routing very interesting.
    TheSilverBuick likes this.
    Life is short. Be a do'er and not a shoulda done'er.
    1983 Mustang GT 302/T5 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
    1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
    1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

    Comment


    • Re: 1973 F-250 - Turbo BBF - It's alive!


      The frame rails on these truck are something like 34" apart, outside to outside. This means the manifolds are very close to the frame rails. So if you try to route exhaust forward and inside the frame, you're sorta gonna get trapped forward of the engine and CV cross member. Ideally my turbine section will be in the passenger side slightly aft of the CV cross member and just outside/over of the frame rail. My current train of thought is to leave the manifolds on their proper side, exiting the exhaust rearward, and loop it back forward and up, outside the frame. Then the down pipe can angle down and outward, back under the rocker panel.
      Beagle likes this.
      Life is short. Be a do'er and not a shoulda done'er.
      1983 Mustang GT 302/T5 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
      1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
      1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

      Comment


      • Re: 1973 F-250 - Turbo BBF - It's alive!

        60mm wastegate and 50mm bov. Very nice looking parts. Hope they work as good as they look.

        Click image for larger version

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        Life is short. Be a do'er and not a shoulda done'er.
        1983 Mustang GT 302/T5 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
        1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
        1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

        Comment


        • Re: 1973 F-250 - Turbo BBF - It's alive!

          The frame rails on these truck are something like 34" apart, outside to outside. This means the manifolds are very close to the frame rails. So if you try to route exhaust forward and inside the frame, you're sorta gonna get trapped forward of the engine and CV cross member. Ideally my turbine section will be in the passenger side slightly aft of the CV cross member and just outside/over of the frame rail. My current train of thought is to leave the manifolds on their proper side, exiting the exhaust rearward, and loop it back forward and up, outside the frame. Then the down pipe can angle down and outward, back under the rocker panel.
          Sounds like the Hooker setup for the Buick Turbo6. Basically shorty headers tied to a 'Y' that then took it back up to the front passengers corner of the engine. I have a set if you'd like pictures of how they did it.
          Central TEXAS Sleeper
          USAF Physicist

          ROA# 9790

          Comment


          • Re: 1973 F-250 - Turbo BBF - It's alive!

            Up doesnt work well with a BBF because the exhaust flanges are at a ~45 angle. That makes the outlet almost aim directly at the fender. Not sure if they will seal properly upside-down either. Haha.

            I think the turbo nearly *has* to go on the passenger side of the engine in order to get everything aimed the intended direction. The narrow-ish frame rails are going to make pipe routing very interesting.
            I don't think you can seal them, the bolt holes aren't in the middle. How about a spacer flange from 3/8 plate ?
            Flying south, with a flock of bird dogs.

            Comment


            • Re: 1973 F-250 - Turbo BBF - It's alive!


              I don't think you can seal them, the bolt holes aren't in the middle. How about a spacer flange from 3/8 plate ?
              A guy on the turboforums used a header flange to space his out 3/8" or so. That might be an option.

              I eyeballed everything a lot yesterday evening. Going rearward might work, but since I am keeping rubber engine mounts, looping it around the frame might prove troublesome. Going forward might be the best choice after all. I think I can mount the turbo higher and have enough room to get the hot side under it without having any super sharp bends.

              Life is short. Be a do'er and not a shoulda done'er.
              1983 Mustang GT 302/T5 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
              1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
              1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

              Comment


              • Re: 1973 F-250 - Turbo BBF - It's alive!

                It's gonna be fast now. I'm putting LS parts on it. 102mm tb. Large stuff.

                Click image for larger version

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                Life is short. Be a do'er and not a shoulda done'er.
                1983 Mustang GT 302/T5 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
                1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

                Comment


                • Re: 1973 F-250 - Turbo BBF - It's alive!

                  Isn't there a left side center dump manifold that can be swapped to the right and point up with an elbow to point it towards the best turbo location?
                  I last ran a 460 20 plus years ago.. And before upswept headers like mud boggers and pullers use, we swapped manifolds.
                  I know 390-352's can be flipped.. Same as SBC.. Outlets are problems..
                  I have (had) a section of exhaust pipe that had manifold flanges on both ends. Used to tell non-car guys it was a new gas saving exhaust.. Actually it went into the right from the left then the right had another exit for both to come out. Manifold looks like it has 2 exits but one is an inlet.

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                  • Re: 1973 F-250 - Turbo BBF - It's alive!

                    Yeah, the dump truck manifold is a center dump. It even has a v-band connection already on it. But, the center dump will interfere with the motor mounts and steering. Flipping them upside down won't work because the exhaust ports are not centered left-to-right between the bolts.
                    Life is short. Be a do'er and not a shoulda done'er.
                    1983 Mustang GT 302/T5 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                    1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
                    1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

                    Comment


                    • Re: 1973 F-250 - Turbo BBF - It's alive!

                      Today I turned my attention to the intake manifold. I followed the same procedure I did when I converted a different Victor to efi. Only difference this time was that I used a step bit instead of a bunch of bits.

                      Bolt jig on, drill pilot holes, remove jig, drill out with step bit, finish size with a 3/4" standard bit. The jig is then used to position the bungs vertically for brazing or welding or whatever.

                      My intake elbow and throttle cable mount both came in today. It's going to look pretty cool.

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                      Last edited by BBR; September 8th, 2018, 06:58 PM.
                      Life is short. Be a do'er and not a shoulda done'er.
                      1983 Mustang GT 302/T5 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                      1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
                      1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

                      Comment


                      • Re: 1973 F-250 - Turbo BBF - It's alive!

                        good info, I'm going to be doing the exact same set of mods to the intake for my 430 Buick motor..... which is coming out of hibernation in a couple weeks
                        Doing it all wrong since 1966

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                        • Re: 1973 F-250 - Turbo BBF - It's alive!

                          so - are you going to tig the injector bungs to the intake, or farm that out?
                          There's always something new to learn.

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                          • Re: 1973 F-250 - Turbo BBF - It's alive!

                            I'm going to attempt to use aluminum brazing rods. I bought mine at harbor freight tools. I've watched several videos on them and think they might work well for bungs.
                            Life is short. Be a do'er and not a shoulda done'er.
                            1983 Mustang GT 302/T5 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                            1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
                            1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

                            Comment


                            • Re: 1973 F-250 - Turbo BBF - It's alive!

                              Busy weekend but I managed to clean the intake with mag wheel cleaner. Works great. Later I tried to use the alumaweld. No luck with my little propane torch. I just could not get it hot enough to get the alumaweld to flow. Too much metal sinking the heat I believe. I think I will fire up the little oxy/acetylene rig and see if it will work better.

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                              Life is short. Be a do'er and not a shoulda done'er.
                              1983 Mustang GT 302/T5 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
                              1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
                              1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

                              Comment


                              • Re: 1973 F-250 - Turbo BBF - It's alive!

                                I thought you had a TIG, maybe you don't have an AC TIG? hmmmm try MAP gas? I've never messed with alumaweld, interested to see how it works for you.
                                There's always something new to learn.

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