"Little" Upgrade Before and After

[pmlmotorsports]

Guys, there's a company in Mass., Design Rotor Technologies, that does drilling, slotting, etc... to OEM rotors. I have used their BMW applications for years without any issues, always using Brembo or ATE or Balo rotors only. Personally, performance gains under normal driving conditions are modest at best, but asthetically speaking, they are the shiznitzzzzz.

[Tiger]

That mini airplane landing braking sound will always be there... depends on how hard you step on the brake. I like that sound... that way I really know how hard I am stopping the car. I had all three... crossed only... slotted only and plain vanilla... Cross is really great... Slotted is just as great without too much noise. Plain vanilla sucks.

[SnakeyesTx]

Okay... forgot to update... Rears went on Sunday a whole lot faster than the fronts. Note to others, the alan head bolt that holds the rotor on is a 5mm where as the front one's are 6mm. That was interesting to find out when it starts raining on you outside while you're holding a 6 and wondering where the heck you're gonna find a 5!

I kinda like the hum when you hit the brakes, but it sounds EXACTLY like when you have a spindle bearing going bad.

Anyway, went to get gas as soon as I was finished and cleaned up. The drive is about .9 miles from my house and there's a few lights and stop signs. As I was topping the tank I walked around the car looking at the wear/break-in pattern on the rotors. It was a little bizarre to see that only about 1" of the outer face was getting contacted and about 1/2" of the rears. Decided to take a longer trip and so far I've got about 20 miles on them. They appear to be widening the contact marks the longer I drive and it brakes very smooth. As for the bite, I didn't think I felt a difference until I bothered looking at the speedo as I was coming to red lights and noticing that I was actually coming into the lights at a little higher speed than before. Felt very controlled and misleadingly smooth.

I've been told pads will wear faster with these rotors, but I'm already used to changing pads about every 8-12 months from my Jeep days so I doubt it'll feel any different when it comes to change intervals.

[winfred]

i've never figured out where the thing about slotted rotors will chew through pads in no time, i got over 50k miles (could of been 60k or better, can't remember when i installed them) from a set of pbr organics on my e30 on ate power discs before i changes the whole suspension, 40k on my 760 turbo volvo on pbr's also before i got rid of the car, still had plenty of meat on them, maybe these people are being sold track pads that are soft as ****