Well, it's alot of physics and without going into crazy jargon. The thick of it is a solid bar, by design cannot withstand as much shear preasure than a hollow bar. A solid bar cannot deflect the force away from it's center axis, as a hollow bar can, since the axis has an empty space to defelect the force. Thus incresing greatly it's shear tolerance. Shear, would be the twisting force.
Even by drilling out the solid bar (which would be impossible once bent) it would greatly increase it's shear tolerance.
Why is hollow better, well it can actually be stiffer than a solid bar. Now of course, has anyone ever twisted a 1" sway bar in half on a BG car....nope. So it's not really about how much shear it can handle but it's ability to deflect that force and continue with it's function.
In summary, if your racing for the championship cup, you'd probably want a hollow bar. If not, then your just fine with a solid bar.
Even by drilling out the solid bar (which would be impossible once bent) it would greatly increase it's shear tolerance.
Why is hollow better, well it can actually be stiffer than a solid bar. Now of course, has anyone ever twisted a 1" sway bar in half on a BG car....nope. So it's not really about how much shear it can handle but it's ability to deflect that force and continue with it's function.
In summary, if your racing for the championship cup, you'd probably want a hollow bar. If not, then your just fine with a solid bar.
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