Mig Brazing anyone?

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I will be working on a motorcycle gas tank project soon...basically cutting out the bottom of one tank and welding in the bottom from another tank... I was planning to tack it with the mig then find somebody with a tig...    (I don't dare try to mig the entire thing myself) but then I found some info on Silicon-bronze brazing wire   / migHas anyone used this method?from what I'm reading, It's the cats azz  for body panels and light sheet metal. some info-  http://www.cadvision.com/blanchas/54...g-brazing.htmlMiller 211Hypertherm PM 451961 Lincoln Idealarc 250HTP 221  True Wisdom only comes from Pain.
Reply:It's a good process to have under your belt but don't expect miracles. If your metal is too thin you can still burn holes, especially if fit-up is less than ideal. Weldingsupply.com has good prices and selection of Si. bronze wire. You will definitely want to practice with scraps of the same gauge metal first.JohnA few weldersA lot of hammersA whole lot of C-clamps
Reply:Originally Posted by John TI will be working on a motorcycle gas tank project soon...basically cutting out the bottom of one tank and welding in the bottom from another tank... I was planning to tack it with the mig then find somebody with a tig...    (I don't dare try to mig the entire thing myself) but then I found some info on Silicon-bronze brazing wire   / migHas anyone used this method?from what I'm reading, It's the cats azz  for body panels and light sheet metal.
Reply:If you have a set of O/A torches just buy a few pounds of R45, a #0 or 1(for Victors) tip and weld it up.No need to get all yuppie.They were welding tanks(and everything else) with that in the day of the model A.Bubble gumTooth pixDuct tapeBlack glueGBMF hammerScrew gun --bad battery (see above)
Reply:Originally Posted by dave powelson[.Suggest you consider doing really good, clean prep, tight fitup for lapped or tee'd jointsthen steel mig tack and have competent tigger finish off. ..
Reply:silver solder? Can probably get hot enough with your mapp torch