Thread: Structure vs mass

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Seems to me when I was researching rule books for guidance on a roll bar for my car, that .120 was the minimum wall thickness for mild steel.

I know you said weight is important, but for the added hassle of getting moly welded properly, I would just use mild steel. Much simpler to weld, cheaper, and more than adequate for the use you described.

Like Jerry said, there are places that can hydro form rectangular tubing with smooth flowing bends. It would be worth checking into. Art Morrison comes to mind, but I'm sure there are others with less of an advertised name that could do it just as well for less money. I would use 2 X 4 due to the weight of the car.

Sounds like a fun project. There is an episode of "RoadKill" on YouTube that shows Mike Finnegan getting the pro built chassis for his 55 Gasser. You might get some inspiration and ideas from it.

Found it! The actual chassis stuff starts at around 19 minutes in. Chassis is by Jim Meyer Racing.

https://www.youtube.com/watch?v=lATwQ7wkhTs

I just looked at Meyer's website. He gives a pretty detailed description of his chassis complete with tubing sizes and thickness.

http://www.jimmeyerracing.com/produc..._chassis.shtml