308 & RCZ Rear suspension information, etc

207cc Sport

207cc Sport

Active member
Fellow Frogger
Joined
Apr 10, 2016
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634
Location
Gold Coast Hinterland
Anyone help with an Internet reference, to do research on the rear suspension of 308 or RCZ.

I'm keen to find out more about the components, and that unique torsion bar.

Tks.
 
These bars are designed with finite element analysis, and I doubt if PSA's version has been made public.

The basic design has a tendency to oversteer, and this is countered by angling the bearing bushes so that the axes meet forward of them The angle depends on the stress characteristics of the beam, so we are back to the secret analysis of the beam shape.
 
If you can calculate the shear centre of the beam (possibly a little forward of the C shape), and join that point to the bearing, you have the axis about which the arm rotates. The wheel axle offset from this is the other component of the moment.

The shock absorbers are placed perpendicular to the arm as far as practical from the articulation on the body.
 
Last edited:
seasink said:
These bars are designed with finite element analysis, and I doubt if PSA's version has been made public.

The basic design has a tendency to oversteer, and this is countered by angling the bearing bushes so that the axes meet forward of them The angle depends on the stress characteristics of the beam, so we are back to the secret analysis of the beam shape.
Click to expand...

that's right, the beam shape. I believe there are two bars.
 
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