Rotors.... for 4.8is with hawk Pads??

[TowX]

Originally Posted by admranger

I'm sure you meant that the lap times decreased with the non-drilled rotors, right?

BTW: that rotor in the pic looked just fine and any competent driver would have been able to drive around any problem caused by that crack!

Yea, yea. You're correct. Lap times decreased.

Would have been hard to get around the track with the right front tire locked up, even though I do spend time in right hand turns with the RF tire off the ground.. Hard to tell in the pic, but when it broke, the surface at the crack had a step in it. As it cooled it flattened out. Actually took a huge chunk out of my Hawk HT10 brake pad.

[admranger]

Originally Posted by TowX

Yea, yea. You're correct. Lap times decreased.

Would have been hard to get around the track with the right front tire locked up, even though I do spend time in right hand turns with the RF tire off the ground.. Hard to tell in the pic, but when it broke, the surface at the crack had a step in it. As it cooled it flattened out. Actually took a huge chunk out of my Hawk HT10 brake pad.

Just drive faster around corners so your right front is in the air!

Seriously though, that had to be scary. There are stories on bimmerforums of rotors shattering from cracks (on track). Those cars did not fare as well as yours. When I raced, the cheap blanks would crack (not drilled rotors mind you, regular ones) way before they would be close to their thickness limits, and I had brake ducting right to the hub!

To the OP: Drilled rotors are worthless. Rotors with the holes cast in them are ok, but since 99.999999999999999999% of drivers and 100% of X5 drivers don't need the slight reduction in rotating mass that this provides, why bother? You have objective evidence provided by TowX, you don't need to recreate the experiement with your X5.