Bending Pipe

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ducinthebay
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Bending Pipe

Post by ducinthebay »

Now, before you drag McTool into some depraved rant about Olga, I need to tell you I'm talking about exhaust pipes.

I want to bend up a set of custom exhaust pipes to make some high pipes like the original 750 Sport that ran at Imola. Long megaphones down each side.

Anyone have any experience in bending up header pipe in nice graceful bends? All hints and suggestions welcomed. Been trolling the web, and finding lots of half baked ideas.


Cheers, Phil
Duc in the Bay
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.
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paso750
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Re: Bending Pipe

Post by paso750 »

not an expert but if you don`t have a pipe bender all you can do is fill the tube with sand, heat it up red hot and then bend.

G.
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englishstiv
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Re: Bending Pipe

Post by englishstiv »

Monsters have a few various designs that could be incorporated into your design

The alternative would be to use the pipe already bent then cut and splice, tack weld up into your own flow angle and if you are not confident in your own welding give it to some one else more able to finish off.

If you are bending your own you will need to also make up a strong jig to bend with and have lots of heat available.

Olga sounds an interesting lady tell us more??? :evil:
DUCATI 907ie 1992
HARLEY DAVIDSON ELECTRA GLIDE CLASSIC 1991
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higgy
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Re: Bending Pipe

Post by higgy »

A bender is the way to go but not the only way. Hand bending generally requires a jig, heat and a good pair of gloves and a lot of time and patience

Here is an article on sand bending


http://www.rorty-design.com/content/sand_bending.htm

It would most likely be quicker and cheaper to buy pre bent sections of pipe and weld it into the system you require


You can always make your own bender as some have done.
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
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paso750
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Re: Bending Pipe

Post by paso750 »

(hillbilly style)
http://www.youtube.com/watch?v=mawebpskaWs
http://www.youtube.com/watch?v=v8mMQbEkr8w
Getting the angle right is really difficult specially if the pipe is not bent only in one dimension
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higgy
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Re: Bending Pipe

Post by higgy »

paso750 wrote:(hillbilly style)
http://www.youtube.com/watch?v=mawebpskaWs
http://www.youtube.com/watch?v=v8mMQbEkr8w
Getting the angle right is really difficult specially if the pipe is not bent only in one dimension

Yoshi knew how to get things done with what you have

Thats a vice and a rosebud tip on an acetylene setup...all you really need

or use prefab pipe http://www.youtube.com/watch?v=n9pHTtyz ... =endscreen
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
88 750
90 906
92 907ie
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ducinthebay
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Re: Bending Pipe

Post by ducinthebay »

Thanks for the inputs guys.
I like the idea of buying prebent tubing, but I am having a hard time finding some 1.5" tubing with a big radius bend.

I love the old style technique of the Yosimura video.

If I can find a bender for cheap, i'll jump on it, and then just resell it when I'm done.

Cheers, Phil
Duc in the Bay
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.
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englishstiv
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Re: Bending Pipe

Post by englishstiv »

Phil rather than looking for pipe see if you can find another exhaust with the type of curve you require then cut and splice that part - as stated look at some monster exhausts on fleabay or gumtree (if you have that) or similiar It sometimes works out cheaper as I have found to my own cost.
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higgy
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Re: Bending Pipe

Post by higgy »

paso750 wrote:not an expert but if you don`t have a pipe bender all you can do is fill the tube with sand, heat it up red hot and then bend.

G.
The sand needs to be void of moisture or it will go off like a pipe bomb...bake your sand in an oven first for at least 3 hours at 350F
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
88 750
90 906
92 907ie
User avatar
ducinthebay
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Posts: 1323
Joined: Sat Sep 03, 2005 12:00 am
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Re: Bending Pipe

Post by ducinthebay »

After looking at countless videos, and websites for benders, I came to the realization that buying bent sections is the cheapest way forward. I found a great selection at Summit Racing http://www.summitracing.com
I'm then going to have the welded up pipes ceramic coated.

Thanks for the input. I'll post pictures of the pipe building process on the Sport page.

Cheers, Phil
Duc in the Bay
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.
User avatar
higgy
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Re: Bending Pipe

Post by higgy »

:beer: :beer: :thumbup: :thumbup:
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
88 750
90 906
92 907ie
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907pasonut
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Re: Bending Pipe

Post by 907pasonut »

good idea Phil, even if youre not a v-good welder the bench grinder can work miracles, my headers were made from approx 14 different bits and pieces all welded together, and recently been ceramic coated by jet-hot...still yet to try them out, but guaranteed up to 704deg c...which wont be a problem unless the engine is running lean.
Cheers Claude.

...long live the square framed duc!

'92 907...numero 2046
'92 851...in progress
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