Rear torsion/sway bars

[rotation_nation]

I’ve searched this forum and google for definitive guidance on differences in handling characteristics between the rear torsion beam stiffeners and more traditional rear sway bars. No luck finding any good information.

I have swift lowering springs and very much like them but would like to reduce body roll and improve turn in feel further. In other vehicles rear sway bars have been my favorite modification. I’m torn between a product like the TB torsion beam stiffener and the white line sway bar. Has anyone experienced both?

https://whooshmotorsports.com/produ...ar-2014-2019-fiesta-st?variant=44624150757554

https://whooshmotorsports.com/colle...mm-rear-sway-bar-2014-fiesta-st-free-shipping

 

[Capri to ST]

I don't know if this is helpful, but this is a quote from one of the Ford Engineers who worked on the Fiesta ST from a video discussing the suspension of the car-
The [REAR] twist beam is about 75% stiffer, and the twist beam on a twist beam car it's like your stay [SIC,=SWAY?] bar, it's your roll stiffness. So the stiffer the twist beam is, it's like putting a bigger stay bar on it. There’s no extra stay bar.. we did it all on the beam.

View: https://www.youtube.com/watch?v=M7YKS9CnpJg

 

[rotation_nation]

Th

I don't know if this is helpful, but this is a quote from one of the Ford Engineers who worked on the Fiesta ST from a video discussing the suspension of the car-
The [REAR] twist beam is about 75% stiffer, and the twist beam on a twist beam car it's like your stay [SIC,=SWAY?] bar, it's your roll stiffness. So the stiffer the twist beam is, it's like putting a bigger stay bar on it. There’s no extra stay bar.. we did it all on the beam.

View: https://www.youtube.com/watch?v=M7YKS9CnpJg

Thanks!! Yes the torsion beam is basically one massive spring/strut mounted sway bar. My question is just: in practice how do the two styles of “torsion stiffeners” change the handling dynamics of our car? Does one yield greater results than the other? One more mild than the other? I’d imagine they both do the same thing just to varying degrees.