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Old 09-18-2005, 01:38 PM   #92
Registered User
Join Date: Jun 2005
Location: Illinois
Posts: 66
My Ride: 2002 325i
Originally Posted by DZeckhausen
What do you plan to do with this car? Do you autocross it? Take it to high speed driving events? Or is this just a daily driver? How important is brake dust?
I autocross, but it's also a daily driver. Brake dust is not too important to me, but I have to admit that the Metal Masters have a lot lest dust, which I kinda like (a bonus?). Not into high speed or track stuff yet (insurance!).

Originally Posted by DZeckhausen
What did you not like about the stock brakes and Metal Master pads? Did you ever fade them? What does "stoppping power" mean to you? What kind of tires (make & model) do you have?The claims made by companies that cryo-temper rotors are completely false. They do not last 3 times longer, nor do they operate at lower temperatures. What you will never see from this industry is a double-blind test that uses the scientific method to demonstrate the benefits of frozen rotors. Instead, you'll hear wild claims from race drivers who are getting their rotors free and will say anything to keep the free stuff coming. If you have some money to blow, you could always purchase a complete set of rotors, have one front and one rear rotor cryo-tempered and have someone install them, but not tell you which was which. Have them seal this information in an envelope. If you go to the track or autocross, you could use a pyrometer to see if one side or the other was consistantly cooler than the other. And after a few thousand miles, you could use a micrometer to see if one side was wearing two or three times faster than the other. Finally, you could open the envelope to see if the results corresponded to the vendors' claims. I'm willing to bet they won't.
I've already bought the plain cryo rotors (no slotting or drilling). So I'll just have to make my own opinion about rotor life. If I don't see anything significant longevity then it's back to OEM, maybe slotted, next time. I did notice that during some highway driving the OEM pads would fade during hard braking above 60 mph or so. The Metal Masters don't seem to fade until much higher speeds (well over 80 mph), but they seem to have less bite during lower speeds when cold. So, I'm thinking that they are not the best choice for an autocross pad. For next time what pads would you recommend for a daily driver that you autocross? You seem to be a dealer of some sort. I currently have Kumho Ecsta MX on my 2002 325i with sport package. I wonder if someone could convince TireRack to do some brake testing? They test tires don't they...
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