That depends on the thickness of the tubing and the welder being used.Your unit should have a chart on the inside of the door where the wire is loaded.If it's a cheap off brand welder without the chart,then it's all trial and error.so whats the best wire to do it with and whats the best setting for this ?????????
seems like u have the same one (firepower)As Ben said, make sure the tubing is clean. You should also remove any galvanic coating before welding as the fumes are toxic. I have a 90 amp flux wire welder at home for basic repairs. It works fine but flux core makes a lot of spatter. Also, a 90 amp isn't going to weld like the one you are used to using at work. They are usually 220 volt and variable amps. Make sure you pay attention to the duty cycle of your welder too. My 90 has a 1/10 cycle. For every minute I weld, it has to cool for 10 minutes. One minute is a long time to hold an arc but can easily be done if you try to weld the entire bead around the tube in one go. If you go too far over the duty cycle the welder will fault. If you fault it too many times, your girl will be mad at you for ruining the welder she got you for your b-day.
im bout to start it soon as i get the pipes so i don't know yet let you know tomorrow if i get them still waitingHow are the exhaust pieces fitting together ? Does one pipe fit into the other, or are you just butt welding them together ? If they fit together nice, you wont have any issues welding even with a gasless flux core ..