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Topic Review (Newest First)
11-21-2012 04:35 AM
malc
Quote:
Originally Posted by S10 Racer View Post
And the OP posted this 5 years ago. Hopefully he has it done by now.
RATS!! I didīnt see that....
11-20-2012 11:00 PM
S10 Racer And the OP posted this 5 years ago. Hopefully he has it done by now.
11-20-2012 10:15 PM
ubendman
huge difference

[IMG]file:///C:/Users/rdelat216@aol.com/Pictures/mandrel%2520non%2520mandrel.gif[/IMG]
11-14-2012 10:59 PM
ODD Jim
Bend it yourself? Why Not?

I bought a tubing bender from Harbor Freight Cheap! And, it is cheap. But, if you are willing to spend your time upgrading its weaker points- it will work. I had to re-invent the set screws on the 36" diameter manual steel wheel that you turn like steering a boat. It takes a bit of strength. You get ability to make some tight bends. They also have a hydraulic unit.
But, NOTHING beats a guy that has been doing it for years behind a professional hydraulic bending machine.
If you are nuts like me- you will do it yourself. But, beating your brains out on poor equipment is a real character building experience. If you have plenty of time, and no money- here is an answer.
Eventually, I converted my unit into a metal strip rolling press. Attached is a photo where I made it roll out Hispano Suiza running board strips. Good luck
11-14-2012 10:00 PM
emwolb summit and jegs sell bends, u-bends, j-bends, of just about any size you could want. also jegs sells hooker exhaust pipe sleeves for welding and they sure make for a nice weld without any slag on the inside of the pipes. i'm currently building a set of 3 into 1 headers for my rocket III triumph motorcycle, and the headers will flow great because of no internal restriction from weld material. the hooker weld sleeves make for a really nice weld area on the outside of the pipes too.
11-11-2012 10:13 AM
hcompton Your local auto parts store can usally order J bends and other angles with in a few hours if they dont have them in stock. But they commonly have at least one or two hanging around. 3" and 4" may not be on the shelf but usally just a wharehouse away.

Also the engine moves so be sure it can flex a little and not break. Also a main reason i dont weld the charge pipes and i dont have a tig on hand most of the time. But you want the charge side to flex. Front wheel drive even more so.
11-11-2012 09:56 AM
hcompton I always use mandrel J bends so you get a long piece with each bend U bends are not as useful for all the strange angles you may need to make. Just get regular mild steel. You should also get at least one or two staight pieces. They can be welded together with a cheap wire feed wleder and do one small spot weld skip and inch and do aonther around and arpund the pipe until its all welded up and sealed. Dont try to run a bead around the pipe. This will usally burn or warp the pipes.

Dont forget to use couples on the key sections so you can uninstall and repair th system. Waste gate pipe, down pipe should not be welded together in case you need to replace parts and repair leaks.

You can also use couplers to hold the pipe in place while you get the final shape and remove and weld each coupled section at a time. Hope that makes since.

Also for intake pipe only use aluminum pipe. Same deal as the exhuast with J bends and silicone couplers useing proper clamps. Dont weld the aluinum charge pipes. Its a pain in the *** to have them all welded up. Just use the god couplers and clamps. I usally buy a charge pipe kit from ebay. They are cheap.

Hope that helps.
11-11-2012 09:14 AM
malc I bought mine from Summit.
11-11-2012 08:58 AM
vinniekq2 If you need 3 inch mandrel bent pieces Jere Stahl also sells Them.Ive also seen people cut pie slices out of straight pipe then weld them back together.Probably cheaper to have them made,unless you want to learn welding or enjoy welding?
11-11-2012 07:32 AM
ubendman ************************************************** ************************************************** ************************************************** ************************************************** *
04-03-2007 11:57 PM
70bird I bought some 3" mandrel bent pipe and a 3" x-pipefrom this guy (Ubendman) on ebay a couple years ago. I just did a search and he is still on ebay.

Mandrel Bent Pipe

I called him up and he is real easy to talk to and seems to be a pretty nice guy. I had him make 4 bends in 3" pipe with XX amount of pipe before and aft plus the 3" x-pipe I purchased on ebay. The grand total was $110 shipped from New York to California. Bob's Muffler (15 miles from me) wanted $40 per bend and seemed like an A** (or he had something stuck up it) when I talked to him on the phone. Several other's I've talked to have had the same experience with him.

Here's a link to Ubendman's website:
Link
04-03-2007 07:54 PM
fiscus The way most people do it is just order the bends from a supplier/store, you can get them in a U shape and cut out the sections and weld them together.
04-03-2007 07:44 PM
302 Z28 Best way is to purchase mandrel bent tubing and weld it together. I have not seen any local muffler shops that can bend tubing without crimping it. A mandrel bending machine is usually way out of a traditional muffler shops budget $$$$$.

Vince
04-03-2007 05:01 PM
redsdad
Quote:
Originally Posted by ChrisMiddleron
Ok thank you guys I figure I will just buy some muffler shop scrap bends some other random bent pipes and piece it together. If I cant get a couple of areas ill just take it to the shop.

Thanks guys,
Chris
You have to buy mandrel bent els. Most muffler shops don't do mandrel bends. When you cut through non-mandrel bent els, you will have an egg shaped hole, not round. You won't be able to line this up properly with the next straight or partial el. Mandrel bent els have a virtually round cross section through the bend. That will allow correct alignment with the next piece.
04-03-2007 01:45 PM
farna You can pack the tubing with sand or some other firm yet pliable material, then make a jig and bend it without collapsing. The problem is you need a lot of leverage to bend the pipe, so you have to use rather long lengths to make your bends. Because of all the waste pipe, it's better to buy the bends then cut and weld. JC Whitney sells mandrel bends (no "crimp" on the inside of bends) in various angles. For headers make sure you get a few U bends at different radii. Then you can cut whatever degree turn you need.
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