Page 1 of 2 12 LastLast
Results 1 to 16 of 17

Thread: Looking for Advice on Brazing

  1. #1
    Subscriber Click here to find out how to Subscribe
    Join Date
    Feb 2006
    Location
    Ashford, Kent
    Posts
    1,272

    Looking for Advice on Brazing

    The Quill exhaust on my CCM is a lovely compact can, but it is too loud for practical usage.
    Taking baffle is a short length of straight through 29mm ID pipe, so it is not really doing much.
    I have fabricated an additional tube form perforated stainless and a stainless core plug, there are 130 3mm holes on the tube, whic provide more area than the existing piupe, so I am hoping to have mimnimsed any icrease in back-pressure, whilst disrupting the pulses o reduce the volume a bit.
    Now I need to join it all together. I am about to go traipsing around some local welding shops, but had though about using the likes of the GoSystem QP8066H torch with MAPP gas and general brazing rods.
    Has anyone used this before, or something similar, and know if it woudl be up to the job?
    The only thing I am master of is my own destiny, and at best only half of it - the rest is entirely random.

  2. #2
    Why not rivet it first so it can be more easily altered if needed?
    KEA

  3. #3
    Subscriber Click here to find out how to Subscribe
    Join Date
    Feb 2006
    Location
    Ashford, Kent
    Posts
    1,272
    Thanks for the thoughts Timolgra. There are 2 answers to your question :
    1) It has gone though several heat cycles, the solid pipe has now heat-hardened. Drilling is now a right PITA.
    2) Some time over the course of the next few weeks I pack up everything uo to start a new life in Europe, this is my final attemt at sorting th Quill. No success, it goes in the bin.

    Even if i did go for a temporary solution in order to test (not a bad idea), if it is successful then my original question still remains.
    The only thing I am master of is my own destiny, and at best only half of it - the rest is entirely random.

  4. #4
    Subscriber Click here to find out how to Subscribe
    Join Date
    Nov 2015
    Location
    Dark Side of the Moon (Haute Loire) France
    Posts
    1,211
    Have you brazed before ? It's a technique that has to be learned just as welding is

  5. #5
    In that case I'd take to someone handy with a TIG welder, it would be done in 5 mins.
    KEA

  6. #6
    Subscriber Click here to find out how to Subscribe
    Join Date
    Feb 2006
    Location
    Ashford, Kent
    Posts
    1,272
    Quote Originally Posted by leadfarmer View Post
    Have you brazed before ? It's a technique that has to be learned just as welding is
    Not since school, no.

    My assumptions:
    1) get it clean.
    2) keep it clean with flux.
    3) keep cleaning it wth more flux until it gets up to heat.
    4) Make sure it is up to ehat and stays here whilst feeding in brazing rod ( flux coated).
    Any major errors there?

    I am used to soldering copper etc with lower temperature solders. The main thing, I think, is whether the torch can get the materials up to temperature
    The only thing I am master of is my own destiny, and at best only half of it - the rest is entirely random.

  7. #7
    Subscriber Click here to find out how to Subscribe
    Join Date
    Feb 2006
    Location
    Ashford, Kent
    Posts
    1,272
    Quote Originally Posted by Timolgra View Post
    In that case I'd take to someone handy with a TIG welder, it would be done in 5 mins.
    Thanks Timolgra. Why TIG and not the more common MIG, If you don't mind my asking?
    Not that I have many of either close by.
    The only thing I am master of is my own destiny, and at best only half of it - the rest is entirely random.

  8. #8
    Quote Originally Posted by Magwych View Post
    Thanks Timolgra. Why TIG and not the more common MIG, If you don't mind my asking?
    Not that I have many of either close by.
    I'm no welder with each so may be talking out of my arse but I understand you can get a finer weld with TIG, anything would do as it's not going anywhere
    KEA

  9. #9
    Subscriber Click here to find out how to Subscribe
    Join Date
    Nov 2015
    Location
    Dark Side of the Moon (Haute Loire) France
    Posts
    1,211
    Quote Originally Posted by Magwych View Post
    Not since school, no.

    My assumptions:
    1) get it clean.
    2) keep it clean with flux.
    3) keep cleaning it wth more flux until it gets up to heat.
    4) Make sure it is up to ehat and stays here whilst feeding in brazing rod ( flux coated).
    Any major errors there?

    I am used to soldering copper etc with lower temperature solders. The main thing, I think, is whether the torch can get the materials up to temperature
    You need to get the hang of making circular motions with the torch to keep the metal at an equal area of cherry red either side of the joint whilst feeding in the rod with an in out motion, that's why brazes always look like waves

    The old buggers who learnt like I did might know a song about Aunty Mary which helped get the rhythm right

  10. #10
    Subscriber Click here to find out how to Subscribe
    Join Date
    Apr 2011
    Location
    Preston, England
    Posts
    262
    If it's stainless and the gaps are not too big you can silver solder it quite easily with a butane/propane torch, some flux powder and a couple of 1/16" rods will be plenty.

  11. #11
    Subscriber Click here to find out how to Subscribe
    Join Date
    Jul 2016
    Location
    West Yorkshire
    Posts
    106
    Quote Originally Posted by leadfarmer View Post
    You need to get the hang of making circular motions with the torch to keep the metal at an equal area of cherry red either side of the joint whilst feeding in the rod with an in out motion, that's why brazes always look like waves

    The old buggers who learnt like I did might know a song about Aunty Mary which helped get the rhythm right
    Lol I remember that song;

    Auntie Mary
    Had a canary
    Up the leg of her drawers
    When she farted
    Down it darted
    Never went there
    No more

  12. #12
    Subscriber Click here to find out how to Subscribe
    Join Date
    Nov 2015
    Location
    Dark Side of the Moon (Haute Loire) France
    Posts
    1,211
    Quote Originally Posted by Diamond GSer View Post
    Lol I remember that song;

    Auntie Mary
    Had a canary
    Up the leg of her drawers
    When she farted
    Down it darted
    Never went there
    No more
    I presume you can braze then

  13. #13
    Subscriber Click here to find out how to Subscribe
    Join Date
    Jan 2014
    Location
    Gloucester United Kingdom
    Posts
    1,375
    If you were nearer, I'd of TIG'd that up in 5 mins.........

    TIG welding is cleaner, puts less heat into the material causing less distortion, and creates no spatter.

    Hope you get it sorted.

  14. #14
    Subscriber Click here to find out how to Subscribe
    Join Date
    Jul 2016
    Location
    West Yorkshire
    Posts
    106
    Quote Originally Posted by leadfarmer View Post
    I presume you can braze then
    I'm an apprentice trained mechanical engineer, did welding and brazing as part of the fabrication aspect. Its been quite a few years since I last had a go.
    Doesn't stop me from appreciating a bit of welding porn now and again. 😁 Have a look on YouTube, there are plenty of videos.

  15. #15
    Subscriber Click here to find out how to Subscribe
    Join Date
    Jun 2007
    Location
    Galway Ireland
    Posts
    3,758
    Go to a heating \ aircon place and get a couple of fluxed silver solder rods. All you will need is a good blow torch.
    Apply a coating of solder (tinning) to both parts and heat and join together once hot enough. the joint will be super strong so you dont need much solder.
    No skill needed but you will have to get the metal very hot so a decent blow torch needed.

  16. #16
    Subscriber Click here to find out how to Subscribe
    Join Date
    Feb 2006
    Location
    Ashford, Kent
    Posts
    1,272
    Thanks everyone, especially for the Aunty Mary song :-)
    For the cost of a tenner, the second "backstreet" (we do not have mnay streets TBH) garage come car auction recycling centre did the job for me.
    They even threw in an hour's Xenophobia and specialist Europhobia for free ;-)



    I still would have liked an excuse to get me decent blow torch, though.
    The only thing I am master of is my own destiny, and at best only half of it - the rest is entirely random.

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Anyone attending a Ride Out or Event organised through the UKGSer Forums does so at their own risk.
UKGSer.com or anyone organising an event posted here will not be held responsible in any way for damage or personal injury sustained while attending any such events.

Members attending any such event do so at their own risk.

The text, images, graphics, sound files, animation files, video files, and their arrangement on this Website are all subject to copyright and other intellectual property protection. These objects may not be copied for commercial use or distribution, nor may these objects be modified or reposted to other sites without prior written permission.

Disclaimer: Use or depiction of the BMW logo or trademark throughout this web site is for illustrative and editorial purposes only, and to the benefit of the trademark owner, with no intention of infringement of the trademark.

The UKGSer Forums may include adult content for which it cannot be held responsible. Your use of this website constitutes acceptance of the UKGSER network privacy policy

"Its about being a grown up hooligan - and if that means a dark visor, remus open pipe and a bit of speeding out of town then all well and good"