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Stainless or Mild Steel

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Old 02-11-2006, 07:15 PM
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Default Stainless or Mild Steel

Why do some people use stainless and some mild steel for turbo exhaust headers?
Old 02-11-2006, 07:56 PM
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First SS cost alot more so a turbo kit price will be higher. Second some say that mild is better for a street car (less chance for cracking) but I really don't know about that. SS would be my first choice.
Old 02-11-2006, 08:56 PM
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Stainless and then coat it.
Old 02-12-2006, 01:41 AM
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Old 02-12-2006, 10:36 AM
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Originally Posted by INTMD8

Old 02-12-2006, 11:04 AM
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Stainless all of the way!!! more expensive but it's better when you do it right the first time
Old 02-12-2006, 11:21 AM
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Originally Posted by 98turbls1
Stainless all of the way!!! more expensive but it's better when you do it right the first time
Forget money. I'm looking at performance, under hood temps, headers cracking. Things like that. Some people have used only mild steel some have used only stainless. I'm looking for people who have used alot of both. Stainless guys say only use stainless, WHY? I've been told that mild steel holds up better from cracking on the street, so that would be a plus!
It seems like alot of race only turbo headers are made from stainless??
Old 02-12-2006, 11:54 AM
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what trans are you going to run Andy? Do you have a full cage? Is this pretty much a race car now or are you still driving it on the street?

what are the specs on your turbo kit? I'm sure you're going all out.
Old 02-12-2006, 02:16 PM
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Andy, what turbos are you going with?
Old 02-12-2006, 09:55 PM
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Originally Posted by LASTLS1
Forget money. I'm looking at performance, under hood temps, headers cracking. Things like that. Some people have used only mild steel some have used only stainless. I'm looking for people who have used alot of both. Stainless guys say only use stainless, WHY? I've been told that mild steel holds up better from cracking on the street, so that would be a plus!
It seems like alot of race only turbo headers are made from stainless??
stainless is harder,but more brittle, and more prone to cracking, but if its thick enough it wont crank anyway...and stainless guys say stainless cause they wanna feel good about wasting there money on stainless steel. Its non-corrosive properties are IMHO the only advatage over mild steel...but do to it correctly you should coat them inside and out anyway, which makes going stainless kinda pointless...

now, some people like the look of stainless uncoated, it gets kinda a blue tint to it once heat cycled, which does look cool, but not cool enough to spend twice the money in materials to build a set

in the end i think it just comes down to personal preference
Old 02-12-2006, 10:08 PM
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So Where Do You Get Mild Steel To Build Your Own Headers ?
Old 02-13-2006, 05:59 AM
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pro turbo systems sells it
aka PTK or PTS ---->
stainless works sells the stainless stuff ----->
Old 02-13-2006, 09:06 AM
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I have been told by a number of fabricators so this isn't first hand information that 304ss has a larger expantion rate and so it is prone to crack more so than mild steel. And was told that 321ss was good for the job, but more expensive so for a street set up I was told to go with mild steel or 321ss if I just had to have stainless.
Old 02-13-2006, 09:52 AM
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Originally Posted by Got Me SOM
what trans are you going to run Andy? Do you have a full cage? Is this pretty much a race car now or are you still driving it on the street?

what are the specs on your turbo kit? I'm sure you're going all out.
I don't have a full cage yet, just a six point.
Really a big part of it is that I can drive it on the street a little more.
Trans, Rossler TH400.
All out, me? I'm going the conservative route.
Old 02-13-2006, 09:57 AM
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Originally Posted by will62085
stainless is harder,but more brittle, and more prone to cracking, but if its thick enough it wont crank anyway...and stainless guys say stainless cause they wanna feel good about wasting there money on stainless steel. Its non-corrosive properties are IMHO the only advatage over mild steel...but do to it correctly you should coat them inside and out anyway, which makes going stainless kinda pointless...

now, some people like the look of stainless uncoated, it gets kinda a blue tint to it once heat cycled, which does look cool, but not cool enough to spend twice the money in materials to build a set

in the end i think it just comes down to personal preference

Thanks, and nice looking set up!
Old 02-13-2006, 10:00 AM
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Originally Posted by Pro Stock John
Andy, what turbos are you going with?
2 Innovative GT66 Q . Jim's making all the calls on this one.
Ernie might have some trouble on his hands!
Old 02-13-2006, 10:58 AM
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Twin 66mm turbos, wow, you will be hard to hang with.
Old 02-13-2006, 12:27 PM
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sweet, i'm sure that car will be badazz andy. I 'd love to have the old harlan setup for a play car.
Old 02-13-2006, 12:27 PM
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Originally Posted by Pro Stock John
Twin 66mm turbos, wow, you will be hard to hang with.
What size are you running?
Old 02-13-2006, 12:51 PM
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I'm going all 321 stainless.

I'll take the winner of Ernie and Andy.


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