[unix]

Originally Posted by 71haulnazz

You can buy a tube bender at Harbor Freight for like $100 bucks. Just pack with sand and bend away. Real easy.

Ha ha that is funny show us some of the pipes you have done..

[KMatch]

Originally Posted by 71haulnazz

You can buy a tube bender at Harbor Freight for like $100 bucks. Just pack with sand and bend away. Real easy.

Those are PIPE benders. A totally different beast. They do bend tubing, but will kink it as the dies aren't the same as pipe is bigger OD. For tubing, some work on the dies is needed or the tube must be packed with sand.

[timothale]

I worked at a company that made oem exhaust systems , mufflers and Misc parts for Harley, Our cnc bender used a mandrel (egg shaped internal dies on a SS cable) that was pulled thru the tubing as it was bent to give the smooth wrinkle free surface. a lot of the tubing had to be annealed and the weld in the correct position to get good pieces.

[cool rockin daddy]

Muffer shops do NOT do mandrel bending. As mentioned before, the inner radius will be pinched in cutting down on the cross area of your pipe. Same with that wonder bender for $100!

[MARTINSR]

Originally Posted by timothale

I worked at a company that made oem exhaust systems , mufflers and Misc parts for Harley, Our cnc bender used a mandrel (egg shaped internal dies on a SS cable) that was pulled thru the tubing as it was bent to give the smooth wrinkle free surface. a lot of the tubing had to be annealed and the weld in the correct position to get good pieces.

That was worth resurrecting this old thread, VERY intresting.

Brian

[domsmith]

Hello..
The information you shared in the post related to the exhaust pipe is really very nice. I am glad I visited here and gathered so much facts related to it. I will look forward to it.
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[Irelands child]

Yes!! I know that this is an old thread, but since no one had posted photos of a home welded up exhaust, wanted to show one for 'posterity' and the next guy who looks.

Built from:
2.250 tubing - a 10/12 foot length
U and J bends from Summit
SS clamps and hangers
Flowmaster mufflers
~$225 for all the above
Then MIGed together



The only 'pro' done pieces were the clamped pipe seen at the H pipe and that was to 'blow out' the pipe size for slip fit for ease of disassembly if ever needed. That cost me the price of a coffee and donut break for the three guys in the Midas shop.

Dave W

[1971BB427]

If I was doing an El Camino I'd just spring for the Summit dual kit at $209. It may need minor changes to make it fit, but it is way easier and closer than starting with just bent pieces of pipe.
Summit Racing SUM-680101 - Summit Racing® Header-Back Dual Exhaust Systems - Overview - SummitRacing.com