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Regular
Posts: 159
 
| I had considered this however it's not without drawbacks.
The coilovers available tend to have eye bushes at each end making it tricky to mount the lower end to the extension rod that bears on the trailing arm knuckle, you potentially have 3 pivot points along the assembly so it won't remain rigid, even if I use a coilover with a threaded end for a pair of donout bushes (as that found on the GTI front shock upper mount) you still only have one threaded stud to screw into the trailing arm pushrod which would have considerable forces acting upon it as the weight of the car linked to a 5-1 suspension ratio tried to compress it in length and ultimately bending it (the assembly) in half at the weakest point (that threaded joint).
The other option is to just use a coilover on its own mounting one end to where the sphere used to fit and the other end direct to the trailing arm located where the knuckle currently fits, which is all doable but would mean modifying (cutting - enlarging) the subframe where the pushrod passes through the hole in the subframe partition between the hydragas unit and trailing arm, I'm unsure how this would effect strength especially in an area of high loads,
Even this is achievable but the biggest drawback is in the coilover dampers themselves, if mounted direct in place of the hydragas unit they too have to operate in a 5-1 ratio, or to put it another way, have their performance reduced by 80%, this renders most off the shelf shocks useless especially since they have to move some degree in order to work properly and in reality they will only move around 5mm at most in day to day driving (equating to 25mm wheel travel) which is not sufficient for a shock to run its best.
Whereas a spring by itself (remote vertical damper) is still a spring albeit under considerable force.
Edited by Jin 9/12/2015 9:20 PM
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quick hydragas question
