posted January 01, 2004 09:28 AM
Its fine to do and when done properly it will be stronger than the rest of the cage..
Its done all the time to re-clip cars etc, though most people probably just **** weld the tubes. Heres the proper way to do it in my mind.
If your doing say a halo or something I would slice it in straight pipe, and on different locations on both sides, so the sliced pipe never lines up.
1. you slice the tube you want to extend.
2. insert a piece of smaller tubing, 1.5 tubing (a 4 inch piece) if its a 1.75 cage, put some tacks on the end of one of the cut outer tube one one side.
3.the tacks keep it spaced apart a little so you have space to fill with the weld and get enough penetration to weld the inserted piece of pipe also at the same time.
4.then you drill a couple half inch holes thru just the outer tube,offset so they arent in line. so you can weld the inner and outer tube together again one or 2 places on each side of the joint would be good.
As you can see doing it this way the joint is actually double pipe, and stronger.
The weakest part of any cage is the HAZ, (heat effected zone) right next to the weld. Thats the reason to drill the holes further out from the seam etc and offseting them also.