It seems like a basic "How suspensions are tuned" might be in order with many of these threads. I am by no means an expert, but I have a pretty good handle of the maths involved and pretty decent practical experience if all you want is a car that handles well, and that you can exploit with confidence.
In a nutshell, suspension tuning is the science of managing weight transfer. Traction at the tire pretty much dictates how far you can go. Less traction? You have to have "softer" suspension. More traction? You need "stiffer" suspension. Obviously, there is a crapload more to it than just this, but it's a really, really good starting point. Got a 27mm rear bar on 205 section width Nankang Lion Claws or whatever? Yeah, I bet it's sketchy as hell. Likewise, running slicks with stock springs, shocks, and sways and I bet it rolls over like a 5 dollar prostitute when the sailors come to town.
It is, after all, called a suspension "system". It's about balance, grasshopper.