9two8

Can anyone confirm for me please.., I need to lift the driver side rear (US side passenger).., up approximately 25mm......., Question I have is do I turn the big threaded adjuster nut up or down to acheive this.

Any info much appreciated thank,s.

Ken
80 928S
5 Speed

UK

Gtaebr

Facing the shock from the side of the car, left to right will raise it.
Going up the threads lifts the car.

9two8

Thanks Joe.., it,s just what iv,e been doing, but it still seems too low and the threaded nut is a long way up the shock in comparrison with the opposite side....., Reason I ask is I was thinking that compressing the spring ie upward would lower the rear..., and de-compressing the spring, might give me height ?

Does this make any sense ?

Ken
80 928 S
5 Speed

UK

AO

Ken-
The car is suspended by the springs. Think of them as posts. If you raise the post, you raise the car. Compression of the spring only occurs when you hit a bump or induce loading by braking or cornering. The shocks dampen the rebound of the spring.

mark kibort

i know what you are saying. this doesnt happen until the shock runs out of travel. up until that point, you will be raising the car. at that point, you just start compressing the spring, but the ride hight stays maxed out due to the out-of-travel shock. If you continued to turn the adjusters, the spring would compress upward, shock would stay maxed out (ride hight max) and the more you compress it (preload) the less the coil can compress. eventually, it woud be a solid bump stop.

mk

9two8

How does this figure ? Iv,e measured the amount of thread showing on the bottom of each side adjuster bottom shock mount, ring/nut, looking from rear of car.., left side = 1 inch of thread showing..., right side = 2 inches of thread showing, this is the side that I want to lift so it,s equal with the left side.
Hope you guys understand this

Ken
80 928 S
5 Speed

UK

mark kibort

There is a motion ratio, so its not 1:1. just do what you need to to get the ride hight you want.

Mrmerlin

Ken both of the rear shocks should have similar amounts of threads showing.
if one side of the car is sitting higher or lower then something is not correct.
if you have fixed something with the suspension it would be wise to inspect your work.
Simply put, adjusting the collars to level the ride height more than a few turns from each side means that there is something else that is not correct with the suspension

mark kibort

That's just not true. so many variables in weight disty, tollerances in the chassis, springs, etc, where it is not uncommon to have one side a few turns differen than the other for the same ride hight. because of the lighter gas tank side corner, my rears have about .7" difference on the adjusters for the best corner balance possible.

mk

GlenL

This is correct: the adjusters should be within a few threads of each other.

Since the side that is "up" is the side you want up more there is a problem.

What do the fronts look like as far as balance between adjusters?

The threads are 1.5mm, BTW. Because of the arm geometry, on the front a turn all the way around will make 3mm of change while on the rear it will be about 1.5mm of change.

Mrmerlin

I have replaced many sets of shocks and I have not had any problems with ride height and the threaded rings are usually within a thread of each side.
That said there is something else wrong if you have more than a few threads difference.
IE a weak spring, a bent shock piston, or an otherwise mis fitted spring perch or you may have not fitted one of the shock stack parts correctly

mark kibort

Isnt there about a 5:1 ratio up front and probably near that in the rear?
1" of shock movement can get 5" of wheel position movement.

GlenL

The shock is mounted roughly halfway down the lower arm. Lifting the spring makes the body rise about twice as much.

mark kibort

good point.

9two8

Thanks for the input guys..., so might it be a good idea to back off the adjuster showing 2 inches of thread to 1 inch so it,s the same as the other side.., then see how it sit,s with regards to level ?

Ken
80 928S
5 Speed
UK