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they are shoes but the reason for not using after a track session is two fold. One, due to the heat, there will be some shoe/pad material that will bond to the rotor. This causes the "warpage", but second and most important is that the pads or shoes can bond solid to the rotor and cause it to lock where the wheel will not move. It will take some torque to break the bond. Best to get in the habit and just leave it in gear.

 

Definitely do a warm down lap and no e-brake on hot rotors

The reason rotors can warp is that the pads will cause one part of the rotor to cool at a slower rate than the parts with no pad

 

The brake system on a turbo generates a tremendous amount of heat at the track. Partly due to the weight of the car and the heavy forces involved.
Always use hi temp brake fluid, the stock stuff will boil and actually melt components....ask me how I know.
Never apply the e brake.
Always try a cool down lap with minimal braking .
GL

 

no e-brake at the track...period - on ANY car.

 

Point to remember is heat. The whole rotor is hot, not just where the pads contact. Due to the heat, the park brake shoes can still potentially bond or transfer material onto the "drum" surface. Particularly with drum brakes, it is significantly more difficult to break the bond due to the design. You may break parts trying to get it loose.

 

OK. Back to brakes 101. What you might have been reading (and hearing at many track events) is partly due to the fact that many vehicles have the park brake integrated into the caliper assembly and therefore use the pad/rotor for the parking brake function. Our Porsches on the other hand (not all of them) have what is called a drum-in-hat. This means that the park brake is a different assembly where it is integrated to the center of the rotor. To answer your question, if you do have a drum-in-hat configuration, it should not "warp" your rotor...but... you may still bond the parking brake to the rotor and therefore the same rule applies. Don't use the park brake. Check out this link, maybe it will help (hope it works or do a search for "drum-in-hat").

http://books.google.com/books?id=mNI...page&q&f=false

 

Anything to help. Have fun at the track! Nice to see these cars out there.

 

thank you jsteg, this is a good explanation and always had this argument with my buddy at the track many times since I though the same as car-narcissist.