I tryed to search but came up with nothing. Im a cert mig welder and im used to repairing hvy duty equip. I started making my turbo crossover with my mig and it was a little tough, i played around with a few ways and i was wondering if it would be strong enough to pulse weld the merge and cross over. By pulse welding i mean like just holding the trigger for a sec or two and moving down half way down the old tack(stacking or stiching). I know that it will not be as strong as running a long continous bead but it will look a lot better. What do you guys think? Thanks

 

Never had a problem mig welding tubing. Are you blowing holes? You would know better than most everyone on this site. But a constant bead would be less likely the leak. Might try smaller wire and less heat.

 

yea i under stand, my work requires me to pulse weld some times and if i keep it nice and orange not letting it cool i can get it pretty seal proof, i just dont know about strength. The turbo will be supported but these things go through a lot of stress with heat and cool down.

 

I always prefer to make a bracket to the engine block to support the weight of the turbo, and then the piping JUST has to be piping...which significantly helps the strength issue.

 

I don't get it...you should easily be able to run a semi-continuous bead on 16ga or thicker steel (stopping to rotate the pipe to continue)

My issue is that with mig you have a fixed heat level so when you encounter an area already welded (thicker) you aren't getting as good penetration.

 

mild steel or stainless? if youre using enough heat you should be fine, gap the pieces of pipe if you can and itall be fine