I'm finding that my TA Technix coilovers are too soft/bouncy on the rear of my MK2 breadvan making my rear arch catch my wheel/tyre. 

 

Has anyone successfully done anything to fix this? 

 

I am planning to raise the rear slightly but I don't think this is going to fix the problem as the rear is very bouncy.  

 

 

You could fit stiffer springs, all you need is the diameter of the springs and ideally the rating of the current springs and you can find a supplier of springs to buy some.