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  • injector bungs

    I am installing injector bungs on a older aluminum intake manifold. The bungs can be tig welded or epoxied. I don't have a tig welder and would like to use Locite Epoxy weld bond?

    How well did it work??

    would you do it again??


    http://www.loctiteproducts.com/p/13/...mpound.htmbond

    Thanks
    Drag Week 2006 11.00 index DNF
    Drag Week 2011 DD
    Drag week 2012 Hot Rod Winner
    Drag week 2013 Hot Rod Winner

  • #2

    Re: injector bungs

    I personally would like to know Nick Smithberg's opinion. I'm likely to rough up the bungs surface and use JB weld on my IRON intake with aluminum bungs. I'll eventually do aluminum on aluminum and haven't decided on the epoxy.
    Escaped on a technicality.

    Comment


    • #3

      Re: injector bungs

      E-85 eats at splashgaurd so I would be welding them in, dont ask me how I know ....................................
      2007 SBN/A Drag Week Winner & First only SBN/A Car in the 9's Till 2012
      First to run in the .90s .80s and .70's in SBN/A
      2012 SSBN/A Drag Week Winner First in the 9.60's/ 9.67 @ 139 1.42 60'
      2013 SSBN/A Drag Week, Lets quit sand bagging, and let it rip!

      Comment


      • #4

        Re: injector bungs

        I used JB Weld to do the one's in the Ranger. I would definitely rough them up or cut some grooves with something so the epoxy has more mechanical "bite". I had 2 come loose and had to re-epoxy them and they were fine afterwards. I did not rough them up but should have.

        http://www.bigblockranger.com/Intakeconversion.html
        Life is short. Be a do'er and not a shoulda done'er.
        1983 Mustang GT 552/C6 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
        1973 F-250 460/E4OD http://www.bangshift.com/forum/forum...uck-conversion
        1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

        Comment


        • #5

          Re: injector bungs

          I would machine thread the two, or pipe thread it maybe.
          2007 SBN/A Drag Week Winner & First only SBN/A Car in the 9's Till 2012
          First to run in the .90s .80s and .70's in SBN/A
          2012 SSBN/A Drag Week Winner First in the 9.60's/ 9.67 @ 139 1.42 60'
          2013 SSBN/A Drag Week, Lets quit sand bagging, and let it rip!

          Comment


          • #6

            Re: injector bungs

            Pipe threaded bungs would make it too dang easy.
            Life is short. Be a do'er and not a shoulda done'er.
            1983 Mustang GT 552/C6 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
            1973 F-250 460/E4OD http://www.bangshift.com/forum/forum...uck-conversion
            1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail

            Comment


            • #7

              Re: injector bungs

              I used JB Weld to do the one's in the Ranger. I would definitely rough them up or cut some grooves with something so the epoxy has more mechanical "bite". I had 2 come loose and had to re-epoxy them and they were fine afterwards. I did not rough them up but should have.

              http://www.bigblockranger.com/Intakeconversion.html
              I don't recall seeing that before James, that is a pretty slick setup that I'll have to remember when I go to convert a V8 intake over!


              Pipe threads, hmmm, I have some pretty large pipe taps, I wonder if I can get suitably large dies? That would be TOO easy.
              Escaped on a technicality.

              Comment


              • #8

                Re: injector bungs

                What's the OD on the bungs. I have a set of H-F NPT taps and dies that should be workable just eyeballing the size of the injectors and your bungs that you had. The tap part would be easy, the die on the bung would be hard I'd think with the stepped shoulder potentially running into the die before you cut any sort of decent threads on it. I guess if you were epoxying them in that wouldn't matter as it would just serve as a way to keep it in place while the epoxy cured.

                Interesting thoughts I'll have to keep in mind if I do a Nailhead or the call of those 1926 Buick I6's gets too strong and I drag them home.
                Central TEXAS Sleeper
                USAF Physicist

                ROA# 9790

                Comment


                • #9

                  Re: injector bungs

                  The OD is right at 3/4".
                  Escaped on a technicality.

                  Comment


                  • #10

                    Re: injector bungs

                    Tomorrow I'll pull the set out and check if any of them would work. That's of the main body right?
                    Central TEXAS Sleeper
                    USAF Physicist

                    ROA# 9790

                    Comment


                    • #11

                      Re: injector bungs

                      Yes the main part.

                      The 3/4" hole.


                      And the bung drops right in.
                      Escaped on a technicality.

                      Comment


                      • #12

                        Re: injector bungs

                        The od of the bungs are 7/8" the ID is .550 . Taping is out of the picture.

                        I have a smooth finish on the bungs I guess I will have to rough them up. James did you use the high temp 400 degree JB weld or the standard 300 degree you see in the stores?

                        Not paining on E85
                        Drag Week 2006 11.00 index DNF
                        Drag Week 2011 DD
                        Drag week 2012 Hot Rod Winner
                        Drag week 2013 Hot Rod Winner

                        Comment


                        • #13

                          Re: injector bungs

                          Here is the intake with me holding the bungs.
                          Attached Files
                          Drag Week 2006 11.00 index DNF
                          Drag Week 2011 DD
                          Drag week 2012 Hot Rod Winner
                          Drag week 2013 Hot Rod Winner

                          Comment


                          • #14

                            Re: injector bungs

                            Finally got to dig out my good calipers and the tap set.

                            1/2in NPT tap has a maximum external diameter of 0.855in but the range I've actually used on it is closer to 0.820in.
                            1/2in NPT die has a maximum internal diameter of 0.765in and a minimum ID of 0.735in.

                            Sounds like they might work but good luck getting the die started on the bung and keeping it straight by hand.
                            Central TEXAS Sleeper
                            USAF Physicist

                            ROA# 9790

                            Comment


                            • #15

                              Re: injector bungs

                              I would machine thread the two, or pipe thread it maybe.
                              This right here would be your best option if welding isn't an option. Epoxy can work too but threads holding it in place would be much better.
                              Last edited by BOSSMAN; February 19th, 2013, 11:40 AM.
                              Nick Smithberg
                              www.smithbergracing.com

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