Quote:
Originally Posted by mimarcos
So out of curiosity, do you think its normal to get deposits and severe vibrations from the OEM pads on a track day? My point being, do you think that the whole vibration thing is due to pad? Because it happened with both the OE and Cool Carbons. So if another set of pads fixes the problem, I think that's something worth trying.
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Some pads are worse than others, but there's no guarantee that switching will fix the issue.
Uneven pad deposit comes from a variety of factors. When pads are heated beyond their maximum operating temperature (MOT), it increases the likelihood of uneven deposit because at this point the pads are at or near their melting point. It also comes from operating at or near MOT and activating ABS. It also comes from improper cool-down. It also comes from...get this...UNEVEN ROTOR SURFACE. You got it. The drilled rotors that's on the MZ4 Coupe actually can exacerbate the problem.
Having a set of pads that has extreme high MOT can alleviate the problem, to a certain extent. Having rotors capable of cooling down the pads and maintain it below the MOT can also alleviate the problem. PROPER BRAKING TECHNIQUE can all but eliminate the problem (look up digressive braking). Cooling ducts will manage the temperature better and combined with a high MOT compound would all but eliminate the problem. Cooling ducts, high end rotors, proper pads, proper braking technique will 100% eliminate the problem.
Having said that.
You throw a set of slicks on the car, and all that goes out the window. The R-comps have so much higher capacity for straight line grip, it makes locking up the wheel very difficult even with top end race pads. The end result is it introduces significantly more heat into the system and you're constantly operating at or near the MOT of even the best of race pads. At that point, vibration in the brake pedal is but a fact of life, the only difference is if it's bad, or REAL bad that it will shorten the life of the suspension components (bushings, tie-rods, ball joints etc).