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Mandrel bending of exhaust

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Old 03-12-2004, 04:50 PM   #1
Bringin'it
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Default Mandrel bending of exhaust

I was talking with a exhaust guy the other day and he is saying that if I get exhaust bent for my car that I should make sure that they use a mandrel type bender. He claims this will create better flow. Is this true ?
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Old 03-12-2004, 05:04 PM   #2
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Default Re: Mandrel bending of exhaust (Bringin'it)

Yes this is true. Non-mandrel bent pipes get smaller around the area of the bend while using a mandrel ensures the same pipe diameter throughout.
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Old 03-12-2004, 05:09 PM   #3
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Default Re: Mandrel bending of exhaust (Nuvolari)

Quote:
Yes this is true. Non-mandrel bent pipes get smaller around the area of the bend while using a mandrel ensures the same pipe diameter throughout.
:iagree:
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Old 03-13-2004, 09:59 AM   #4
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Default Re: Mandrel bending of exhaust (Bringin'it)

He, and the guys who have responded, speaketh the truth. I can't remember the exact % of cross section a die bender eats up, but I think it is around 30%???

Either get it mandrel bent (harder to find a place to do it and more expensive usually) or buy pre-bent elbows and make your own.
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Old 03-13-2004, 10:06 AM   #5
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Default Re: Mandrel bending of exhaust (Bringin'it)

The mandrel bending process maintains a constant inside diameter, even through pipe bends. Flow area remains consistent, increasing flow more than approximately 35% compared to stock, serrated bent pipes.

Pete.




[Modified by 84whitevette, 3:06 PM 3/13/2004]
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Old 03-13-2004, 03:01 PM   #6
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Default Re: Mandrel bending of exhaust (84whitevette)

Check out this site, http://www.vansantent.com/definitions.htm
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