Upside-down for Welding Floor? Options

[bkrantz]

I am almost ready to attach my new rear half floor panel. With the car on a rotisserie, I can rotate to any position. My intuition tells me to position the car upside down, so that any flex will tend to "open" the door frames, and do it equally. With the car sideways, any flex will be asymmetrical. I do have door and diagonal braces welded in.

Any suggestions? Am I being paranoid?

[tygaboy]

I'm president of the local chapter of Paranoid Chassis Welders. Do it with the car upside down. It can't hurt. I'm a big fan of taking any mechanical advantage available when welding on the chassis.

That said, welding in the floor isn't very high risk in terms of messing up the door gaps. Certainly not like welding in a stiffening kit or long repairs.

[bbrock]

I'm president of the local chapter of Paranoid Chassis Welders. Do it with the car upside down. It can't hurt. I'm a big fan of taking any mechanical advantage available when welding on the chassis.

That said, welding in the floor isn't very high risk in terms of messing up the door gaps. Certainly not like welding in a stiffening kit or long repairs.

(IMG:style_emoticons/default/agree.gif) I think it would be pretty hard to mess up the door gaps welding in the floor. The important thing is to make sure all the dimensions are correct before any welding. My rotisserie didn't allow the car to go upside down so I welded the complete floor in on the vertical, but with solid longs, I had no measurable flex. That said, if I could have welded it with the car upside down, I would have. The bigger risk would be welding the floor in with the car wracked out of square but if you are only doing the rear section, there isn't much chance of that happening either.