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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sat, Aug-12-2017, 02:00:32 AM   #11
black bnr32
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Default Re: Another "Which header is this?" Welds much better than Supersprint

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Originally Posted by STAATS View Post
You can see the HAZ (Heat Affected Zone) in the second and third picture and without being able to inspect them in person it looks like they have been wire brushed after welding as you can still see the shadow of the HAZ .
agreed
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Old Sat, Aug-12-2017, 02:40:29 AM   #12
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Default Re: Another "Which header is this?" Welds much better than Supersprint

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Originally Posted by STAATS View Post
You can see the HAZ (Heat Affected Zone) in the second and third picture and without being able to inspect them in person it looks like they have been wire brushed after welding as you can still see the shadow of the HAZ
That does appear the case. Is there a reason why people remove the colouration as opposed to just leaving it as is?
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Old Sat, Aug-12-2017, 05:57:10 AM   #13
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Default Re: Another "Which header is this?" Welds much better than Supersprint

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That does appear the case. Is there a reason why people remove the colouration as opposed to just leaving it as is?
There is no benefit to removing the discoloring.
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Old Sat, Aug-12-2017, 07:56:37 AM   #14
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Default Re: Another "Which header is this?" Welds much better than Supersprint

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There is no benefit to removing the discoloring.
+1

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That does appear the case. Is there a reason why people remove the colouration as opposed to just leaving it as is?
Most people (end users) remove it because they do not like it / don't really understand it... they just want the picture perfect stainless steel finish all over...

Fabricators and/or manufacturers would only do it if they are trying to cover up a poor weld... As I said before... Colouration itself is not bad... but depending on the colour it can indicate issues with the weld (mainly the burning off of alloying elements)... I am not hugely educated on colouration of SS post welding but as an example for Chrome-Moly (aka AISI 4130... stuff Roll Cages are sometimes made out of if it isn't standard Cold Drawn Seamless Mild Steel) if the HAZ becomes a rich blue it basically means they have burnt all of the Molybdenum out of the material in the weld and the surrounding area and hence the weld has becomes a weak point. If it is a lighter blue and orange/brown then it usually means its okay or you would need to do further investigation to tell if there are any issues.
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Old Sat, Aug-12-2017, 04:25:34 PM   #15
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Default Re: Another "Which header is this?" Welds much better than Supersprint

If the welds are strong and made correctly, and there are no issues with fitment, who cares if there is some discoloration? Are you always in your car looking at your headers? Once installed you're not going to see those headers again unless you're under the car. Hence why the OE headers have similar welds to the SS ones. There's no good reason to do anything beyond the weld itself. If you are really that worried about the appearance, coat the headers and call it a day.
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Old Sat, Aug-12-2017, 05:20:19 PM   #16
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Default Re: Another "Which header is this?" Welds much better than Supersprint

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Originally Posted by STAATS View Post
+1



Most people (end users) remove it because they do not like it / don't really understand it... they just want the picture perfect stainless steel finish all over...

Fabricators and/or manufacturers would only do it if they are trying to cover up a poor weld... As I said before... Colouration itself is not bad... but depending on the colour it can indicate issues with the weld (mainly the burning off of alloying elements)... I am not hugely educated on colouration of SS post welding but as an example for Chrome-Moly (aka AISI 4130... stuff Roll Cages are sometimes made out of if it isn't standard Cold Drawn Seamless Mild Steel) if the HAZ becomes a rich blue it basically means they have burnt all of the Molybdenum out of the material in the weld and the surrounding area and hence the weld has becomes a weak point. If it is a lighter blue and orange/brown then it usually means its okay or you would need to do further investigation to tell if there are any issues.

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There is no benefit to removing the discoloring.
Just some food for thought from people who are in the biz Seems like people DO remove the oxides (discoloration) which causes corrosion.






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Old Sat, Aug-12-2017, 05:36:26 PM   #17
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Default Re: Another "Which header is this?" Welds much better than Supersprint

Tig is a much cleaner and dense weld, thats why its's used in pipe applications, the Super Sprint looks like Mig welding, a faster and cheaper welding process.
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Old Sat, Aug-12-2017, 06:46:39 PM   #18
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Default Re: Another "Which header is this?" Welds much better than Supersprint

To an untrained eye those welds don't look bad, but if you know what your looking at those welds are not great. They're cold in most places and then really hot in others, not enough filler in most areas. They're decent welds, but nothing special.
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Old Sat, Aug-12-2017, 06:48:31 PM   #19
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Default Re: Another "Which header is this?" Welds much better than Supersprint

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Tig is a much cleaner and dense weld, thats why its's used in pipe applications, the Super Sprint looks like Mig welding, a faster and cheaper welding process.
The pics in this thread of supersprint welds are miged, most items on their site are tiged, I'm not sure why they switch between the two.
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Last edited by idntknow2005; Sat, Aug-12-2017 at 07:03:50 PM.
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Old Sat, Aug-12-2017, 09:00:00 PM   #20
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Default Re: Another "Which header is this?" Welds much better than Supersprint

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Originally Posted by idntknow2005 View Post
To an untrained eye those welds don't look bad, but if you know what your looking at those welds are not great. They're cold in most places and then really hot in others, not enough filler in most areas. They're decent welds, but nothing special.
I appreciate your input. I am still learning about how a good weld is supposed to look even though I have no welding machine. It is something I want to get into once I get priorities taken care of.


Quote:
Originally Posted by idntknow2005 View Post
The pics in this thread of supersprint welds are miged, most items on their site are tiged, I'm not sure why they switch between the two.
I googled some other Supersprint headers and it does look like the S54 headers I posted are/were mig'd. These S54 stepped Supersprint headers look a lot better


Akrapovic welds look nothing short of amazing and seem to check all the right boxes. Too bad they don't offer anything for the S54.
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Discussing Another "Which header is this?" Welds much better than Supersprint in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)