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Old 11-10-2020, 10:07 AM   #74
Norm Peterson
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Drives: 08 Mustang GT, 19 WRX
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Quote:
Originally Posted by Pcormier66 View Post
Is there some chemical reaction going on to create more heat with race pads?
If the clamping force between the rotor and pad is the same, the heat generation is the same. Race pads will activate ABS sooner, and more consistently, lap after lap. That's why lake braking is so much more effective, and fun, on race pads. And that's what causes higher temps, which leads to more heat soak. Said another way, you need less pedal pressure with race pads to generate the same braking performance as OEM.

I use high torque pads on all my track cars. Have for 15 years. Probably tried very brand under the sun. No fancy aftermarket cooling or parts. Just good, fresh fluid.

As for catching cars in the corners, just because you late brake doesn't mean you are not also able to trail brake. Good technique involves both. It's not one or the other. I would agree that your consistency to trail brake after a late braking event is lower. But if you get it right, the rewards are huge. And isn't that why we are doing this?
My guess - and at this point it's strictly a guess - is that high-mu pads conduct heat better than lower-mu pads. This would be inherent with the specific formulation, things like metallic content, and exactly what metal.

That amounts to making the pads behave somewhat less effectively as either heat sinks or insulation, as more thermal energy - heat - is passing through them more quickly. It's a problem in thermal transient behavior.


Incidentally, I came across some slightly different mu curves for some of Hawk's pads, only a couple of weeks ago. And information that Hawk has reformulated at least the HP+.

DTC60


DTC70



Norm
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