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Old 06-20-2004, 12:35 AM   #1
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Default Reshape exhaust pipe

After some tumble, exhaust pipe do have some knock that cause it to dent and reduce the internal volume. Any idea on how to reshape it back to the almost it original shape?

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Old 06-20-2004, 12:58 AM   #2
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What pipe do you have?

Depending on how bad it is damaged, you could try the freezer trick which worked for me satisfactorily once but the dent wasn't that bad.

Plug both holes, fill it with water and then put it in the freezer for a few hours or even overnight.
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Old 06-20-2004, 09:14 AM   #3
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Hi Evolution

Thanks for the tip. Will try tonight. Anyway pipe is RB 086 for 1/8.

Rgds
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Old 06-20-2004, 09:23 AM   #4
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Don't forget to use some tapes to bind the body of your tuned pipe. Otherwise the pipe will become FUNNY FAT after you try the freezer trick ....
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Old 06-20-2004, 08:22 PM   #5
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Use milk instead of water.
Some people say they have better results when using milk.
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Old 06-20-2004, 09:17 PM   #6
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Quote:
Originally posted by dino.tw
Don't forget to use some tapes to bind the body of your tuned pipe. Otherwise the pipe will become FUNNY FAT after you try the freezer trick ....
Another alternative is to zip tie em.
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Old 06-20-2004, 11:05 PM   #7
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Thanks guys for the great tips.

Tried yesterday night without the extra tip of binding it (have not seen the binding tips). Result - Extra fats on the waist line... kind of odd but hey... at least it breathing alright.

Rgds

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Old 06-21-2004, 05:23 PM   #8
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The extra fatty pipes work pretty well IMO. There are a couple of things you need to worry about. If you have any small holes or tears before freezing, this will become a huge hole and you will end up throwing the pipe away. The other is the inside convergence cone. If that thing becomes detatched or if it moves greatly, again, you might was well throw the pipe away. I have gotten away with freezing pipes many times and overall, I would recommend it to anybody.

There is one tip I got from a machinist friend. Make a steel plugs the same diameters as the pipe openings and use that to plug the ends. In the stinger end I use an old slightly bent suspension pivot ball. The reason is that by using these pieces of steel the water will freeze faster around the openings concentrating more expansion inside the pipe for expanding and popping out dents.
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