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Old 05-13-2003, 10:58 PM   #1
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Default Reforming dented dual-chamber pipes?

I have heard that dented pipes can be reformed by filling them with water and putting them in the freezer. Can this be done with dual-chambered pipes? I need to reform my RD Logics pipe, and am afraid that freezing water in it may cause the chambers to lose their shape relative to each other. This, in turn, would cause the pipe to lose performance. Anybody tried this?
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Old 05-14-2003, 12:29 AM   #2
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Default Re: Reforming dented dual-chamber pipes?

Quote:
Originally posted by chachi
I have heard that dented pipes can be reformed by filling them with water and putting them in the freezer. Can this be done with dual-chambered pipes? I need to reform my RD Logics pipe, and am afraid that freezing water in it may cause the chambers to lose their shape relative to each other. This, in turn, would cause the pipe to lose performance. Anybody tried this?
yes, it would work but my friend has experienced that the pipe had expanded too much and it was cracked from the welding point, especially the AE dual chamber pipe. to avoid that happened, you should put a retainer to maintain the pipe in right shape of diameter when expanding in the freezer. good luck and hope it would help.
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Old 05-14-2003, 01:26 AM   #3
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when freezing your pipes make sure that you have all the holes on the pipe blocked up very well otherwise the ice will just expand and wont pull the dent out of the pipe at all. Usually this procedure can take over night and even a couple of goes at it. To help stop the pipe from over expanding put a couple of zip ties rapped around the pipe to minimize that over expansion!!!!

Jeremy.
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Old 05-14-2003, 01:44 AM   #4
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What do you use to plug the holes?
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Old 05-14-2003, 08:01 AM   #5
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Quote:
Originally posted by chachi
What do you use to plug the holes?
When I did the trick to my old HPI tuned pipe, I pluged the header and stinger with rubber Great Planes carb-caps. They come in a package of several sizes. I then stuffed a screw into a short piece of fuel tubing ( to plug it ), I think I CA'ed it the screw into the tubing also, then put that on the pressure nipple with a zip tie holding it down. I also zip tied the carb caps.

My pipe did expand a little bit over-all too, but I liked the pipe more afterwards, so i wasn't complaining.
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Old 05-14-2003, 01:15 PM   #6
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I do this all the time. I fixed one pipe last night and have another in the freezer now.

To block the big hole I have an exhaust coupler with a 1/2" socket extension zip tied in it. The steel will help the water freeze faster and seal the gap. My friend who taught me about the steel actually has a section of steel rod that is the correct diameter to fit in the opening but I made do with what I had. Then I push the open end of the coupler on the pipe and zip tie it tight. For the stinger I block it with an old bent pivot ball and electrical tape is the ticket for sticking while it is still wet.

The process kind of goes like this:

1) Pull off a 1-2' long piece of electrical tape and stick on counter.
2) Zip tie blocked exhaust coupler to pipe
3) Fill sink with water
4) Submerge pipe and fill with water (critical point #1 is to shake it around to get all air bubbles out)
5) With pipe still submerged, put pivot ball in stinger facing upward.
6) In left hand, put thumb over pressure nipple and lift straight out of water with stinger facing up. (critical point #2 is do not lose any water)
7) Grab electrical tape in right hand and wrap around the diameter of the pipe and pivot ball slowly but tight while not losing water.
8) Gently place in freezer at that same angle. Make sure you have something in your freezer to prop the pipe up so the stinger is facing straight up. I use a couple of old rubber sedan tires
9) Let freeze for 4-6 hours. If there are still dents, thaw in warm water and repeat 1-8. I had one pipe that took 6 times but it finally looked and worked great.

I thought about the zip ties around the pipe to fight over expansion but my fear is I'd end up with a turbo ring looking pipe.

WARNING: If there is any hole in your pipe including a pinhole in the weld, this with likely destroy the pipe and blow it open.

If anybody doesn't understand and sees me at the track, ask me because I have these pieces in my toolbox and I can show you.
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Old 05-14-2003, 01:17 PM   #7
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BTW, Troy I found a couple of my over expanded [pregnant snakes] 9886 1/8 onroad pipes worke really well too.
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Old 05-14-2003, 02:02 PM   #8
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fraz:
how do you plug the pressure nipple, or do you plug it at all?

also, will a crack around the base of the stinger rip open?
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Old 05-14-2003, 09:44 PM   #9
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Quote:
Originally posted by chachi
fraz:
how do you plug the pressure nipple, or do you plug it at all?

also, will a crack around the base of the stinger rip open?
You use fuel tubing and a ziptie.
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Old 05-15-2003, 12:13 AM   #10
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this does work i have done it ..

when you do it lean the pipe up so that the bottom of the pipe is down. then frezzzzz it ..

ones its done just poor some hot water on it... And your good to go...
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Old 05-15-2003, 12:32 AM   #11
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It fix my Mugen pipe....

Damo
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