Hey guys, I am in the final stages of finishing my turbo build and all I really have to do now is get some welding done. I am looking for some info on how to weld a stainless steel 3" V-Band flange to my exhaust housing on a T3 Garrett turbo. Any help would be greatly appreciated since I am unsure on what the housing is even made of material wise.

I've seen it done before but in this case a picture is not worth a thousand words, thanks in advance.

 

Pre-heat the housing and then weld.Let the housing cool slowly after welding.

I welded a stainless V-band onto my cast GT42 housing with mild steel rod and had no issues.

 

I think you are susposed to use all the same types of metal because of different expansion rates. Ie stainless use stainless rods

 

Nickel rod is the best, if not, 321 is ok

 

Sorry for the photo collage, its the only pic i had of it. This is on one of my buddies lil drift mobile's. Hes been runnin it hard for over a year without any issues.

IMO, people make too much of a fuss over cast to x material. This is to a stainless vband, used 309 rod. Welded great, and has held up well. Much better than dealing with an adapter. This is with no preheat. I was just very heat conscious, cleaned as meticulous as possible, and moved around alot tryin to keep the heat even. I can see it making a difference on a very low quality casting. But most turbine housings are really high quality pieces in comparison to other cast i've welded.

 

cast iron or steel can be welded with stainless steel using stainless steel sticks at a MMA welder. I have done this meny time (in order to repair cast iron exhaust manifolds...

 

I agree with this advice.. and the welding isn't bad either. I would bet the root pass is better than some of the top names in automotive stuff. You ever walk the cup?

 

Thanks a lot man, i havent actually got a chance to really practice walking the cup. Im going to be building a lot of tables soon and i definately want to try it on some structural stuff. Typically i go as hot and fast as i can manage, but on structural pieces im sure theres benifit in having a larger weld profile. Would you reccomend starting actually walking the cup or a free-hand weave?

 

x2.

I've welded a 4" stainless v-band to an old Holset H1E that I cleaned up in the same manner . . . works great.

 

people are overwhelmed by the word cast iron when more of what we use is cast steel. Not directly falling into the sole category of cast iron