The Stovebolt Site Forums The Shop Area Paint and Body Shop Sheet metal welding

I am getting close to actually welding in floor pans and rocker panels. I've been practicing on some scrap sheet metal, and its going pretty well. However, I am still having a little trouble welding a joint. I can lay a decent bead on a solid surface, but if there is more than a hair gap between the pieces I burn through consistently, almost instantly. Heres my questions:

1. How tight a fit does it need to be between the patch and the cab?

2. Any tips or techniques for sheet metal?

I am using a Lincoln Weldpac 140, Argon/CO2 mix, .025 wire at level "C" and speed about 1 to 1.5...

Thanks