welder for motorsports

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I plan on upgrading my mig machine(Millermatic 135), but I am unsure? I plan on using a new machine for roll cages, bumpers, motorsport related projects. I always used shop 3 phase machine in the past but I need a 1 phase machine for myself. What does everyone suggest??
Reply:why are u upgrading? isnt that 135 big enough for those type of jobs?
Reply:Some of the tubing wall thicknesses would be pushing my little Miller pretty far. However, I've had that machine for close to 10 years and I've have no complaints. I was thinking a Millermatic 251. I want a machine that I can connect my MK Prince spoolgun to. I've also thought about selling my Miller XMT 304 CV machine and buying XMT CC/CV machine and adding wire feeder to that. The shop I used to work at used Pow Cons and XMTs mounted on racks and the wire feeders and gas cylinders  were on carts. We could MIG, TIG or stick off the carts. I thought about a set up like that, but how would that be in terms of weld quality. I worked in a pipe fab shop so everything(minus the stainless process piping) with think material. How would that set up work for my application?
Reply:DD, you might want to look at which sanctioning bodies you will make cages for. In many classes, you can only use tig for new builds. SCORE offroad, NHRA have these kinds of rules. Some do not, like NASCAR. A 251 would be a great machine, no doubt that it would easily do the job. If you need a little tig machine to compliment the migs, then a Miller Maxstar 150 would do the trick. If you'd need to weld aluminum, as you know, you'd need a bigger tig welder. But the aluminum would be easy enough with a spoolgun and a 251 mig.And then, after so much work...... you have it in your hand, and you look over to your side...... and the runner has run off. Leaving you holding the prize, wondering when the runner will return.
Reply:Originally Posted by RojodiabloDD, you might want to look at which sanctioning bodies you will make cages for. In many classes, you can only use tig for new builds. SCORE offroad, NHRA have these kinds of rules. Some do not, like NASCAR. A 251 would be a great machine, no doubt that it would easily do the job. If you need a little tig machine to compliment the migs, then a Miller Maxstar 150 would do the trick. If you'd need to weld aluminum, as you know, you'd need a bigger tig welder. But the aluminum would be easy enough with a spoolgun and a 251 mig.