tein flex install

I installed a set of tein flex shocks to my mk3 supra and found that the rear set did not drop the ride hight much at all. The front set on the other hand can put the body on the ground.
Has anyone else used these shocks?
How low should it drop it?
I have the rear set with the spring fully loaded up, and the lower half wound right in, the wole unit seems to be too long, If I wound the lower part out , The rear would sit fu#king (f@#king) high.