MIGging stainless exhaust - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 03-30-2011, 12:36 PM   #1
Junior Member
Thread Starter
 
kday's Avatar
 
Join Date: Aug 2008
Location: Boston
Posts: 223
Total Cats: 0
Default MIGging stainless exhaust

I have a little 110v MIG machine (Lincoln 140C), a bottle of 100% argon, and a bottle of C25. I want to add a resonator to my stainless Enthuza 3". I'm reading conflicting info on whether this can be done well. I had good results with the mild steel downpipe but apparently stainless needs more juice. Anyone done it with similar equipment? What wire and gas did you use?
kday is offline   Reply With Quote
Old 03-30-2011, 01:16 PM   #2
Senior Member
iTrader: (6)
 
Join Date: May 2009
Location: San Francisco
Posts: 989
Total Cats: 23
Default

You can use normal wire and gas, but the welds will rust. I would suggest trying to get it tigged
wittyworks is offline   Reply With Quote
Old 03-30-2011, 06:51 PM   #3
Newb
 
Join Date: Aug 2010
Location: Wentzville
Posts: 17
Total Cats: 1
Default

I plan to do the same thing with my Linconln 140c. My plan of attack is to use Lincoln Blue Max MIG 308LSi wire and experiment with what little 75%-Ar/25%-CO2 gas I have left. From what I've been reading an Ar/Co2 mix with ~2%CO2 should work much better. Let me know how the 100%Ar works.
jaf1901 is offline   Reply With Quote
Old 03-30-2011, 07:05 PM   #4
Elite Member
iTrader: (4)
 
Pen2_the_penguin's Avatar
 
Join Date: Dec 2009
Location: Reno, NV
Posts: 3,690
Total Cats: 97
Default

used an off brand flux core welder on stainless, welds worked fine but yeah, they rust.
Pen2_the_penguin is offline   Reply With Quote
Old 03-30-2011, 07:27 PM   #5
Junior Member
Thread Starter
 
kday's Avatar
 
Join Date: Aug 2008
Location: Boston
Posts: 223
Total Cats: 0
Default

Quote:
Originally Posted by jaf1901 View Post
I plan to do the same thing with my Linconln 140c. My plan of attack is to use Lincoln Blue Max MIG 308LSi wire and experiment with what little 75%-Ar/25%-CO2 gas I have left. From what I've been reading an Ar/Co2 mix with ~2%CO2 should work much better. Let me know how the 100%Ar works.
Being impatient I decided what to buy based on what Amazon would ship me before the weekend, so I just ordered a Vibrant 1142 3" Ultra Quiet Resonator and a spool of US Forge Welding Stainless Steel MIG Wire .030 2-Pound Spool #00676 . I'll give that a shot with the 75/25 first since that's what they recommend and see how it goes. Maybe I will try purging with the argon at the same time.
kday is offline   Reply With Quote
Old 03-30-2011, 07:54 PM   #6
Senior Member
iTrader: (1)
 
Join Date: Jun 2007
Posts: 669
Total Cats: 29
Default

Interesting.. I was plaining on miging mine as well. i have 304 exhaust mani components and 308 wire (as suggested by airgas employee) and 100% argon. they said tri mix would work best but argon would probably do fine.
yank is offline   Reply With Quote
Old 03-30-2011, 08:07 PM   #7
!!! NOT CONFIRMED !!!
 
Join Date: Nov 2007
Location: Virginia Beach, Va
Posts: 158
Total Cats: 1
Default

Tig ( for looking best job ) and 100% argon for stainless
elderc is offline   Reply With Quote
Old 03-30-2011, 08:18 PM   #8
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 406
Default

lincoln handy mig 110V welder
stainless steel
I think 308L wire and 75/25 mix gas.



next you can swap the polarity and weld some aluminum with straight argon.
y8s is offline   Reply With Quote
Old 03-30-2011, 08:20 PM   #9
Junior Member
Thread Starter
 
kday's Avatar
 
Join Date: Aug 2008
Location: Boston
Posts: 223
Total Cats: 0
Default

Please note the thread subject does not say "should I MIG or TIG my stainless exhaust?"

If I had the shop space I'd have a TIG for sure, but I have a one car garage and it's already busting at the seams.
kday is offline   Reply With Quote
Old 03-30-2011, 08:29 PM   #10
Newb
 
Join Date: Mar 2011
Location: Las Vegas
Posts: 23
Total Cats: 0
Default

Answer, yes you can mig stainless, its just not as clean and it will rust.
livemind is offline   Reply With Quote
Old 03-30-2011, 08:40 PM   #11
Junior Member
Thread Starter
 
kday's Avatar
 
Join Date: Aug 2008
Location: Boston
Posts: 223
Total Cats: 0
Default

Quote:
Originally Posted by y8s View Post
lincoln handy mig 110V welder
stainless steel
I think 308L wire and 75/25 mix gas.

next you can swap the polarity and weld some aluminum with straight argon.
Great, thanks for the report.

I have a spool gun for my 140 and that's why I have the tank of argon in the first place. Have yet to produce a pretty aluminum weld, but I have stuck a few pieces of thin aluminum together.
kday is offline   Reply With Quote
Old 03-30-2011, 09:34 PM   #12
Senior Member
iTrader: (2)
 
Join Date: Aug 2007
Location: North Cackalackey
Posts: 716
Total Cats: 2
Default

Just spray some high temp paint over it and call it a day
musanovic is offline   Reply With Quote
Old 03-30-2011, 11:21 PM   #13
Junior Member
Thread Starter
 
kday's Avatar
 
Join Date: Aug 2008
Location: Boston
Posts: 223
Total Cats: 0
Default

Quote:
Originally Posted by musanovic View Post
Just spray some high temp paint over it and call it a day
This is a common attitude here I know, but for some of us it's not any fun unless we at least try to do it right. Building something nice is kind of the point...
kday is offline   Reply With Quote
Old 03-30-2011, 11:23 PM   #14
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 406
Default

I haven't had rust issues yet FWIW. you could probably use a more resistant wire but I don't know which that is. And it's probably harder to use.
y8s is offline   Reply With Quote
Old 05-23-2011, 05:22 PM   #15
Junior Member
Thread Starter
 
kday's Avatar
 
Join Date: Aug 2008
Location: Boston
Posts: 223
Total Cats: 0
Default

I finally got around to adding a resonator to my stainless exhaust. It was really easy. Just like working with mild steel. And holy **** my car is quiet now! The difference a little 10" long resonator makes is amazing.



I used 308 wire (.030) and tri-mix gas (which was kind of pricey).
kday is offline   Reply With Quote
Old 05-31-2011, 05:37 AM   #16
Newb
 
Join Date: Sep 2010
Location: VA
Posts: 12
Total Cats: 0
Default

I guess i'm ******* old school because last time i had to weld up some stainless i just broke out the tried and true Lincoln 110 ARC welder i have and used stainless rods lol
C_MONEY is offline   Reply With Quote
Old 05-31-2011, 09:29 AM   #17
Senior Member
iTrader: (2)
 
Join Date: Sep 2008
Location: ON
Posts: 523
Total Cats: 2
Default

Quote:
Originally Posted by kday View Post
I finally got around to adding a resonator to my stainless exhaust. It was really easy. Just like working with mild steel. And holy **** my car is quiet now! The difference a little 10" long resonator makes is amazing.



I used 308 wire (.030) and tri-mix gas (which was kind of pricey).
How is the fit in the tunnel? I'm having issues with the rear longitudinal bracing as is. Do you notice any increase in spool time?
inferno94 is offline   Reply With Quote
Old 06-01-2011, 03:21 AM   #18
Newb
 
Join Date: May 2011
Posts: 8
Total Cats: 0
Default

Quote:
Originally Posted by livemind View Post
Answer, yes you can mig stainless, its just not as clean and it will rust.
Quote:
Originally Posted by Pen2_the_penguin View Post
used an off brand flux core welder on stainless, welds worked fine but yeah, they rust.
Quote:
Originally Posted by wittyworks View Post
You can use normal wire and gas, but the welds will rust. I would suggest trying to get it tigged
You can buy stainless wire to use with a mig spool gun and it shouldnt rust.

I havent tried it myself, so I cant say for sure... But more experienced people have told me to use 100% argon with stainless mig. As well as to Never use flux core as it will cause the welds to rust quicker as well as it is never as clean as gas welding.
charredchar is offline   Reply With Quote
Old 06-01-2011, 04:23 AM   #19
Elite Member
iTrader: (4)
 
Pen2_the_penguin's Avatar
 
Join Date: Dec 2009
Location: Reno, NV
Posts: 3,690
Total Cats: 97
Default

Quote:
Originally Posted by charredchar View Post
You can buy stainless wire to use with a mig spool gun and it shouldnt rust.

I havent tried it myself, so I cant say for sure... But more experienced people have told me to use 100% argon with stainless mig. As well as to Never use flux core as it will cause the welds to rust quicker as well as it is never as clean as gas welding.
Correct on the argon gas

Flux core doesnt rust faster, but will rust like any steel weld. but it spatters like a ************. Have to coat the area around the weld area with anti-spatter to get a clean weld.
Pen2_the_penguin is offline   Reply With Quote
Old 06-01-2011, 04:38 PM   #20
Newb
 
Join Date: May 2011
Posts: 8
Total Cats: 0
Default

Quote:
Originally Posted by Pen2_the_penguin View Post
Flux core doesnt rust faster, but will rust like any steel weld. but it spatters like a ************. Have to coat the area around the weld area with anti-spatter to get a clean weld.
The way it was explained to me with Flux Core is its basically an acid or solvent core that is used to clean the metal you are welding to. But it also creates a lot of spatter (hence use anti-spatter) and leaves a residue over everything.

I never bothered with flux myself, just went right to gas welding. Ive watched someone use flux and it was a mess, I dont see a point if you can get gas.
charredchar is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
1994 Spec Miata Race Car SM/SM2/SSM For Sale Quinn Cars for sale/trade 6 10-23-2016 08:58 AM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
ISO 1.6 turbo cast iron manifold cale saurage DIY Turbo Discussion 16 10-01-2015 12:25 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 02:32 PM.