Cobra Brake upgrade problem

hmmmm... i could hear a similar sound when i first put mine on... but it went away and now i only hear it wheni brake next to a wall or something

I recently went with calipers and slotted rotors that had been running on the car (a 99 Cobra)together. I had them turned before install, and they had a slightly roughed up finish, meaning not real slick like a rotor with some miles on them. As soon as I drove it, I noticed that I could very easily hear a differance in noise when they are applied. And I can say that there is a different "feel" throughout the car when they are applied. Not a vibration, but not a real silky smooth application of the pad to the rotor either as with stock parts. I am thinking this is normal with the non-smooth rotors we are using, so I am going to hold off judgement for awhile.