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Topic Review (Newest First)
06-30-2012 10:02 AM
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
06-30-2012 05:02 AM
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
06-30-2012 02:44 AM
domsmith
Re: Ideas for bending exhaust pipe

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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07-11-2011 10:02 PM
MARTINSR
Quote:
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
07-11-2011 06:11 PM
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!
07-11-2011 01:54 PM
timothale
tubing bender

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.
07-11-2011 09:20 AM
KMatch
Quote:
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.
07-11-2011 08:57 AM
unix
Quote:
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..
07-11-2011 06:40 AM
timothale
pipe bending.

Some of the better equiped shops have a cnc pipe bender, If they have the program to bend your pipes. I saw a U tube a while back on bending pipe. The guy used several layers of duct tape on the end, then got on a ladder and used a wood closet hanger pole and WET sand and packed it in tight then duct tape layers on the top end. He then used the HF pipe bender. 50 plus years ago I tried the packing it with dry sand, and heating with a torch and it didn't work . We were putting twin pipes on a chevy 6. I bought a new stock pipe then made the necessary cuts and welds to have the second pipe fit. easier than building the whole thing with U 's and straights. 40 years ago we did an all nighter in a muffler manufacturing factory in the bad area of detroit. building a new exhaust for the 427 Cobra that won the 2009 optima That exhaust has since been replaced, . I used 1/8 gas welding rods to get the pattern shapes we needed then loaded the pipe and manually bent and rotated the pipes to get all 8 pipes bent.
07-11-2011 05:45 AM
dina hi....this good work .....i have project in my university about study the effect of heat treatment on the spring_back in u bending process and ineed some help about it or any reffernes ...if you have any thing about it can give me
06-30-2009 10:06 PM
isaac338 I took mine to a local shop and had them do some bends.. they didn't even charge me.

Problem with this method is if the bends don't turn out perfect it requires tons of trips, or you do what I did, and cut small angles in the pipe with the bandsaw and weld it back together. Simulated bends, I guess

Doesn't look the greatest but whatever, it's just a pickup.
06-25-2009 08:02 AM
71haulnazz You can buy a tube bender at Harbor Freight for like $100 bucks. Just pack with sand and bend away. Real easy.
06-24-2009 11:24 PM
ericnova72
Quote:
Originally Posted by Mike H
Have fun getting by the trans crossmember on the drivers side. I have built quite a few crossmembers out of 1 5/8" tubing for the G bodys so they can get real dual exhaust on the car without going under it or bith pipes on the pass. side of the car.
The 64-72 Chevelle crossmember fits these cars very nicely(I've done this) after trimmimg a little length (less than an inch) off each end and redrilling the mounting holes. Bolt it up to the tranny mount then and square it up to see where you need to drill the new holes in the frame. This crossmember has two humps for dual pipes, and I believe the 73-74 Chevelle/Monte Carlo member could also be made to easily fit.
06-24-2009 08:31 PM
Mike H Have fun getting by the trans crossmember on the drivers side. I have built quite a few crossmembers out of 1 5/8" tubing for the G bodys so they can get real dual exhaust on the car without going under it or bith pipes on the pass. side of the car.
06-24-2009 08:40 AM
newdad1 Good point.

Jethro-Style? LOL
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