So i was board and determined to verify if what i've heard for a teg/civic wheel rates were correct. Since i am planning a brake swap and just did all my bushings, i have extra control arms and the front and rear upright and assemblies lying around. After taking all the dimentions that i needed i have come to the following conclusions and results.

The front wheel:

the MR is as follows (+/- a few 16ths), ~11" is the length from the inside pivot to the shocks mount, and ~15" fom the inside pivot to the lower ball joint. Then from the front face of the disc to the lower ball joint is (2.985") ~3".
so the MR front is as follows, MR = (11" / (18"-offset). the minus of the offset is due to the fact that force is a point load and it taken at teh center of the wheel...which is moved further insde as the offset goes more + (if your offset id negative then you do + offset for the formulation)....my final my readings are .65 for the front (i have a 30m offset wheel)...but the shocks is not 90 to the arm...so the Cos (theta) should be taken into acount...which i measured (not very well so if you have a better number let me know) to be 15 degrees inside from the perpendicular which will result in reduced applied force....so the end result is a front MR of .67:1.

WR = SR x (Li/L2)^2 Cos (theta)

Rear Wheel:

Same thing is happening i get these values using OEM teg arms and assemblies, MR: = 10.24"/ (17.59 - offset) = (for me) .624, and again i measured the angle in the shock rear to be about 10 degrees.

Front Roll Centers.

This is calculated with my car with it's ride hight set so that the front LCA's are horzontal with the road, this makes abour 5.5" ride height. NOW.. depeding on the angel of the upper grontrol arm in this posistion it will determine the Roll Center, but from my very good guestimation i would get -25 degrees from the horizontal resulting in a Roll Center hight (assuming the car was even on both left and right, which it is not) of 4" from the ground (22.7" tires) and a FSVA lenght of 49.5", which results in 1.8 degrees of camber for every 1" of wheel displacement.


I did not do the rears yet, but i might tommorow do sketch for rear roll centers. Please let me know if you tink my numbers are wrong or i screwed up in somthing.....

 

ttt. just the info i was looking for

 

The rear roll center should be located at the same height as the trailing arm bushing pivot shaft. The rear roll center isn't based on the position of the upper and lower control links. The suspension rolls around the axis created by the main trailing arm pivot point.

As for the front, I have not measured it.

Your motion ratios don't seem right, I have been using 1.45 in my front and rear frequency calculations.