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Old 02-05-2009, 08:40 PM   #1
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Default Mandrel bent IC piping question

I know a mechanic that owes me a favor so I am probably going to use it to have him bend pipes for my IC when I get it. My question is, would steel heat up if I have him use that? Or should I definitely use aluminum (I know it'd be lighter). Also - I have the Greddy kit, I'm not sure if there'd be any interest in anyone else wanting these - I think the price would probably pretty cheap. Also - How thick should I have them made? I'm at 6psi now but will probably throw a megasquirt in within a year and increase it.
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Old 02-05-2009, 09:06 PM   #2
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definitely, definitely use aluminum.
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Old 02-05-2009, 09:14 PM   #3
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Quote:
Originally Posted by linuxbox View Post
I know a mechanic that owes me a favor so I am probably going to use it to have him bend pipes for my IC when I get it.
Most shops don't own a mandrel bender.


Quote:
My question is, would steel heat up if I have him use that?
With a heat supply, I see no reason why steel could not be heated.

Quote:
Or should I definitely use aluminum (I know it'd be lighter).
What's the question again? Use a question mark after a question.

Quote:
Also - I have the Greddy kit, I'm not sure if there'd be any interest in anyone else wanting these - I think the price would probably pretty cheap.
Try using commas and periods instead of " - "

Quote:
Also - How thick should I have them made?
I highly doubt the guy making the pipes can control the thickness. He can only purchase tubing and bends. Thickness shouldn't be an issue.


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I'm at 6psi now but will probably throw a megasquirt in within a year and increase it.
MS is good.
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Old 02-05-2009, 09:18 PM   #4
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I know he has a mandrel bender - he did my exhaust.

It was obviously a question of using steel or aluminum, as the other poster understood.

By thickness I meant diameter of the tubes.

I'll certainly try my best to keep my use of dashes to a minimum - I understand its very important.

:-/
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Old 02-05-2009, 09:26 PM   #5
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And I'm not sure if I was clear enough, I meant if I use steel, besides the added weight, would it get hotter from the air going through it than aluminum would?
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Old 02-05-2009, 09:27 PM   #6
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Quote:
Originally Posted by linuxbox View Post
I know he has a mandrel bender - he did my exhaust.

It was obviously a question of using steel or aluminum, as the other poster understood.

By thickness I meant diameter of the tubes.

I'll certainly try my best to keep my use of dashes to a minimum - I understand its very important.

:-/
Let's see a couple pics of your exhaust. Most exhaust shops don't have a mandrel bender. Is this a race-oriented shop?

The question was not obvious. The only thing obvious is you don't care to use proper grammar.

Diameter, ah. That makes more sense. I'd use 2.5" as that's commonly what intercooler outlet end tanks are and that's also the O.D. of the throttle body.

Grammar is very important.
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Old 02-05-2009, 09:29 PM   #7
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Alright, I've seen his mandrel bender. I've seen him use his mandrel bender, I've heard him call it a mandrel bender, I've heard the story of how he bought this mandrel bender. He has a mandrel bender.
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Old 02-05-2009, 09:34 PM   #8
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Are you absolutely and positively sure it's a mandrel bender?
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Old 02-05-2009, 09:58 PM   #9
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Good grief. Does anyone know what a "Mandrel Bender" is? In my view, It essentially means in all forms of tube bending that the cross section area of the bend does not decrease from that of the basic tube.

I have never seen a mandrel bender in a muffler shop. The benders they use are generally called "press benders". The press bender very surely crushes the tube in the middle of the bend.

It is clearly fair to suggest a tube is mandrel bent if it is welded together from real mandrel bent tubes.

What was her name? Very pretty lady, sang country and western... something Mandrel..
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Old 02-05-2009, 10:17 PM   #10
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Well hell, I figured everyone would already know by thickness, you meant diameter... We are all mind readers after all.

Whats the deal with filling the pipe to be bent with sand? Is that part of the mandrel process, or am I thinking of something else? Or does that just reduce the ammount of "crush" in the bends?
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Old 02-05-2009, 10:21 PM   #11
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Yeah its basically an antique, but its nice as ****. But yeah, if I can get one piece aluminum bent pipes for IC, would anyone else be interested? I can get him to make multiple copies of mine if anyone does.
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Old 02-05-2009, 10:24 PM   #12
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I dont think that would work too well seeing as no 2 turbo kits seem to be 100% the same. Everyone has done a little bit of work to their kit, and with all of the variations in chassis and options, nope. Plus if its like installing my header around the steering linkage, I will pass, and use 2 or 3 pieces with couplers.
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Old 02-06-2009, 01:19 AM   #13
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Quote:
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What was her name? Very pretty lady, sang country and western... something Mandrel..
Barbara Mandrell
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Old 02-06-2009, 09:46 AM   #14
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I've got some 2.5" copper tube laying around, would that do? I am supposing rapid heat transfer - whatever the tekkie term is - is desirable.
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Old 02-06-2009, 11:24 AM   #15
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Holy - crap.


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I dont think that would work too well seeing as no 2 turbo kits seem to be 100% the same.
Have one built, post pics. I guarantee that if it is mandrel bent, clean, and one piece for the hot and cold side, GReddy owners will take a look at it. The difference in effort between cobbling a kit together with bends/connectors and modifying a welded two piece kit is marginal compared to the results.

Take a look at the thread about the Ebay Probe three piece IC kit.
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Old 02-06-2009, 12:34 PM   #16
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I used mild steel pipes for my IC.

Works fine.
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Old 02-06-2009, 01:07 PM   #17
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Steel should be fine...FWIW...IF you are going to do it...might as well do Aluminum if you can. Kinda like turboing a miata...IF you are putting all this power in a miata...might as well change the clutch while you're at it. Not nessecary but it's a good idea...make sense?
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