Recently switched to R5 Racing coilovers which have a height adjustable spring in the rear but also an adjustable length damper (Same design as BC Racing). Had a shop install them and they just set the shock length to the same as stock and set the ride height via the spring. Now the ride in the rear seems unusually firm even with the dampening set on it's softest, it just bangs and crashes like it's rock hard!


Is there a proper way of setting the rear shock length in relation to the rear spring height that they didn't do? The spring is also slightly loose when the car is jacked up with the rear wheel off the ground which doesn't seem right either.


I'm comfortable making the adjustments myself just need advice on if they've installed it wrong and how I can set it properly.


Pic of my setup: