Quote:
Originally Posted by Gforce
If the cap were to be sealed the master cylinder could not work. The air space above the fluid needs to be at atmospheric pressure.
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Go take the cap off and have a closer look...
Quote:
Originally Posted by Gforce
Heat capacity of the braking system isn't an issue unless you get to fluid boiling temperatures. For that to happen the heat has to get into the caliper cylinders. Brake rotor temperature will be much higher than the fluid boiling point. Bolting heavier rotors onto your car may or may not improve that.
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Thank you captain obvious? You said boiling the fluid wasn't possible unless the fluid was old. Mike and I said you can easily boil stock fluid because there isn't enough thermal capacity in the stock system for the OEM fluid. The implication there is that you're putting a lot of heat into the system.
Quote:
Originally Posted by Gforce
For street use the fluid isn't going to boil, ever.
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Who said it would? Again, you're not actually reading properly. All anyone has said is that you can easily boil the stock fluid. Easily doesn't mean driving to the grocery store.
Quote:
Originally Posted by Gforce
Brake pad material certainly does not experience a constant coefficient of friction. Street pads have a higher coefficient of friction when cold. Track pads have a higher coefficient if friction when hot. All known pad materials exhibit a coefficient curve dependent on temperature.
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No one said the coefficient was constant. You're half right in that a stock pad will have a higher co-efficient of friction at street temperatures than when at track temps and that a race pad will have a higher coefficient of friction when hotter, but what you're missing is that it's possible (and common) for the track pad to have a higher coefficient of friction than stock pads when cold.
Lets say (totally fictitious since I can't find actual specs on our OEM pads) the stock pads have a coefficient of friction curve that is like this:
0*C - 0.20
50*C - 0.25
100*C - 0.30
150*C - 0.15
And a race pad is like this:
50*C - 0.40
100*C - 0.45
400*C - 0.50
800*C - 0.40
So yes, the OEM pad is better at lower temps, and the race pad is better at higher temps, BUT the race pad is better than OEM across the board.
It's already been posted, but look at this chart again:
The WE1 is their endurance pad, and not what anyone has been talking about. The W1 is a street pad, the W7 is their highest heat capable non endurance pad. Notice the W7 starts at a higher coefficient of friction even at ambient temperatures? Are you going to argue with the Winmax published specs? You better have some data (ideally brake dynos) to back that up.
Higher coefficient of friction typically means more noise and dust, more rotor wear, and they're harder to modulate. That's why OEM pads tend to be lower.
Also keep in mind that OEM pads have to deal with extreme freezing temperatures too, I would be they're rated down to -40C. If you go back, you'll find that I have said that running track pads in our winters doesn't work, but in summer tire weather it's totally fine.
Like it's been said many times in this thread, you can easily engage ABS on track pads when cold, which means your claims of it being unsafe are completely unfounded and false.
Until you've actually driven a car back to back with good modern track pads and OEM pads, just give up arguing what you don't know about.