What exactly are you trying to adjust? More steering angle? Less steering angle? More/Less force feedback? I think a lot of people are going to be confused as to what you mean by "change degress". do you mean, "degrees"?
When you Plug it in to the PS3, its all about the game and what the game supports, maybe some games may have some options so that you can be able to switch how much you would like to turn, other wise you can not change it.