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Are these for real? Donut mandrel bends

   
Old 09-17-2007, 11:09 AM
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Default Are these for real? Donut mandrel bends
http://www.hrpworld.com/index.cfm?fo...action=product

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Old 09-17-2007, 11:12 AM
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I've seen them used for real tight radius's, a guy on the forum actually had one sitting in his garage when he said he was going to be building his own exhaust.
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Old 09-17-2007, 11:13 AM
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those are nice for buildung mani's...
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Old 09-17-2007, 11:14 AM
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allows you to weird bends that arent made
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Old 09-17-2007, 11:17 AM
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Yes, that's how you make these:






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Buy an MSPNP Pro, you'll feel better.
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Old 09-17-2007, 11:22 AM
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Yes, they are a welded seam type deal. We used them on our DP's for Scion's.
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Old 09-17-2007, 11:30 AM
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My buddy bought some and used them to fab up a tight bending turbo intake pipe. I'll see if I can find some pics somewhere because it looked niiice..
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Old 09-17-2007, 11:40 AM
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its too expensive there, plumbng suppliers have them for cheaper i think...i can get those made from a friend also, not sure how much, but not nearly what they want...
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Old 09-17-2007, 11:41 AM
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jc whitney has em too
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Old 09-17-2007, 11:44 AM
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Are they stamped and welded?
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Old 09-17-2007, 11:47 AM
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ive only seen stamped, but those look like tha they have a seam.
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Old 09-17-2007, 12:02 PM
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road/race sells them too. I think they're like seven hundred dollars.
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Old 09-17-2007, 01:03 PM
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I wanna know how they are actually manufactured.
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Old 09-17-2007, 01:04 PM
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I would think halves are stamped and welded. I'm too stupid to figure out any other way.
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Originally Posted by concealer404
Buy an MSPNP Pro, you'll feel better.
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Old 09-17-2007, 01:25 PM
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pretty sure they're formed cake-tins and welded halves.

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Old 09-17-2007, 01:31 PM
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The inner seams have to be finish welded when you cut it apart as well. Only the outside seam is completed.
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Old 09-17-2007, 02:25 PM
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I've seen them hydro-formed from flat plate and then welded on the OD seam. The ID has no seam on the hydro-formed units.
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Old 09-17-2007, 03:06 PM
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Ahh ok, thanks. That makes sense. For tight radii I've been using ATP's tight radius 90's and 120's. This is another interesting option.
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Old 09-17-2007, 11:54 PM
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Originally Posted by TurboTim
Yes they work awesome but they have an inside seam that needs to be welded.
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Old 09-18-2007, 08:24 AM
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Now links to less expensive versions. I know you have them!
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