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Discussion Starter · #1 ·
When someone says a certain exhaust is TIG/MIG welded what does it mean? Is TIG welding an important factor in considering what DP/exhaust system I should buy? Is it ok if a system is non-TIG welded? I suppose everythings fine as long as the weld holds up when heated.
 

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Re: Exhaust welds (Gambit)

That last post doesn't even come close to answering the question. Basically some metals will weld great using MIG other metals require TIG. Depending on the exhaust materials being used THAT would answer your question.
The titanium exhaust for bikes are TIG welded. My buddy told me I could give him Stainless Steel and he would TIG weld it for me.
So I'm assuming TIG is good for SS and titanium. MIG won't welded SS or case hardened steel (i've tried).
 

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Discussion Starter · #5 ·
Re: Exhaust welds (chad979)

What I really want to know is whether there are any good TB exhaust systems out there that use non-TIG welds

Are MIG welds less strong than TIG ones?
Do APR, FM, ATP, CG downpipes and catbacks all use TIG welding?




[Modified by chad979, 3:29 PM 2-12-2002]
 

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Discussion Starter · #7 ·
Re: Exhaust welds (chris86vw)

I just need to know whether it makes a difference at all. Because I have a guy who can make me stuff - but MIG welded only.
Can you answer the questions from my previous post please? I just need to know. Thanks. http://****************.com/smile/emthup.gif
 

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Re: Exhaust welds (chad979)

Go for the MIG welding it will be fine. MIG welding is also a little less brittle wich would help prevent cracking. A go if your friend is cheap. MIG Welding afects a larger area with heat. TIG is much more confined, It provides more control for delicate materials. FYI Most metals can be welded with both procecses. Most exhaust shops use MIG becasue its faster, cheaper and easier.
 

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Discussion Starter · #9 ·
Re: Exhaust welds (BajaBoy7)

Thanks.
Another question I have for everyone is whether the type of weld will affect your decision to buy a system. For example, if theres a TIG welded 3 inch TB system that costs $1000 and another identical system (only difference is that its MIG welded) that costs $900, would you pay an extra 100 bucks for the TIG welding? Which one would you get?
 

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Re: Exhaust welds (chad979)

Without getting into details Mig welds are pretty good for mild steel or aluminized steel. Tig welds are far superior, the penetration is superb. One nice thing about Tig welding is that you can join two parts with no filler allowing for a very clean look while achieving a true bond. On your next question, if I was going to spend 900 on a system, I would spend another 100 for Tig welds. However I would assume the materials would be different. Mig is generally associated with mild steel and Tig with Stainless or aluminum. A higher quality alloy goes along with a higher quality weld process.
 

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Discussion Starter · #11 ·
Re: Exhaust welds (Project20v)

Assume both are same material (304SS)....only diff is the MIG system costs 100 bucks less. TIG welds are worth 100 bucks?
What about if the MIG welded system cost 200 less?



[Modified by chad979, 8:27 AM 2-13-2002]
 

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Re: Exhaust welds (chad979)

Personally I don't like the idea of MIG welded Stainless Steel. I would pass. If you're talking Stainless, you really should be talkin TIG...MIG welding Stainless takes alot of bugering without real penetration. If your only option is MIG then go with aluminized steel tubing, not stainless.
 

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Re: Exhaust welds (Project20v)

quote:[HR][/HR]Without getting into details Mig welds are pretty good for mild steel or aluminized steel. Tig welds are far superior, the penetration is superb. One nice thing about Tig welding is that you can join two parts with no filler allowing for a very clean look while achieving a true bond. On your next question, if I was going to spend 900 on a system, I would spend another 100 for Tig welds. However I would assume the materials would be different. Mig is generally associated with mild steel and Tig with Stainless or aluminum. A higher quality alloy goes along with a higher quality weld process.[HR][/HR]​
exactly, Stainless steel requires a much higher melting point to get achieve 100% bonding, and MIG welding can't accomplish that. I would never ever buy a stainless steel exhausts with MIG welds.
I used to work in a shop that fabricated custom awnings, and we used both types. MIG welds are far inferior in quality and finish compared to TIG welds. The cost of TIG welds mostly makes up for the expense of the gas used. Some shops won't even fire up their TIG welder for less then 70-80 bucks, even to weld a pipe.
MIG welding stainless steel is the equivalant of using cotton threads to mend silk shirt... it will work to the point of functionality, but not your best choice.
 
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