Braineack

iTrader: (62)

we could not penetrate when trying to weld the hangers...im unsure of what blend of gas we used.

y8s

iTrader: (8)

Since the muffler is stainless and the piping is mild, I used 309L and argon only. I brought my tank of Mix 75/25 but was too lazy to hook it up. or maybe I did. I forget.

hingstonwm

iTrader: (2)

Straight argon is for aluminum

y8s

iTrader: (8)

maybe i used mix then. i'd have to go look at which bottle has the cap removed.

it's possible I bought the straight argon for aluminum welding for fun.

hingstonwm

iTrader: (2)

Whatever gas you are using the welds look good.

In your pics you have some pretty good gap in the tubes. The recent exhaust work I have done I butted the tubes together. I found I was able to turn the heat up a bit and get better heat penetration without burn through. I figure this is okay since exhaust is not structural. What are your thoughts.

Kind of off topic, But I think I am going to build a second exhaust with a smaller muffler and build as straight a system as possible. Then I will take both exhaust to the dyno to test

Braineack

iTrader: (62)

the image of my welds was a test tube.

Pipes were butted up good when we tacked them:



again click to see full size.

y8s

iTrader: (8)

Ideally you do want them to butt up flush and then chamfer the edges so you're welding in the vee to help penetration... but when you're doing a sloppy garage job and it's a humid 85 degrees, you work fast with what you have.

also, I had to spend some time filling brain's burn through hole when he was learning to weld.

Braineack

iTrader: (62)

I thought we weren't going to talk about that.

hingstonwm

iTrader: (2)

Yeah I see it now, the tubes are butted tight. Chamfer would be best, but we are talking about 16 gauge, I would be afraid of burning through.

Braineack

iTrader: (62)

this we did, look here again:



we beveled, "chamffered," the edges with the flat side of the chop saw.


or would chamffering be doing that to one pipe and having the other sit overtop?

hingstonwm

iTrader: (2)

Nice work, I was lazy, just butted the tubes together. Worked fine on my last exhaust, but not the best way to build it.