I recently upgraded my brakes. I got some EBC Grooved discs & a set of greenstuff pads. Now i let these 'bed in'...the instructions said to give around 300 miles i think, and i went easy for around the 700-1,000 miles mark. Now say i'm doing 80mph on the dual carridgway, and comming up to a roundabout, i apply a fair amount of brake...i get a kind of groaning noise and i can almost feel the grooves in the discs through the brake pedal(if that makes sense). I also feel like i'm getting brake fade. My dad is a good mechanic and he is unsure about what it is/could be (although he hasn't driven the car). Could it be something to do with the amount of heat producted? Don't get me wrong, its not REALLY dangerous, i dont have to use the handbrake or anything lol, but i'm not getting the performance that i was expecting. This is my first brake upgrade on any car, is this something others have come across before? P.S. The brakes are quite good in town driving maybe 30mph-45mph Please can someone help??!!