Front suspension banging

[fjules]

I have Steeda CC plates, Tokico 5-way adjustable struts (RB3140) and custom springs from Hermann. The springs lowered the car maybe 3/4".
The car rides fine in general but when I go over a sharp bump like a 90 degree edge the front suspension just bangs hard like there is no suspension at all. I tried all 5 strut setting but didnt change the issue. Anybody have any ideas as to the problem?

 

[Coiled03]

What is the spring rate on your springs? I'm guessing your springs and struts are badly mismatched.

 

[sleepless]

I had the same problem with the Steeda CC Plates; there is a machining flaw in some of them. You'll need new plates (I only had on bad one and they replaced it).