Reply to "Brake fluid?"

rockyMember

quote:
Water doesn't absorb, that is true. But INSTEAD of absorbing, it collects. Absorbing is a GOOD THING. Collecting is a BAD THING. When it collects, it causes all kinds of issues. Even worse in racing conditions. It could be used for a street car without any issues if changed on a regular basis.

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Wilwood does not recommend using DOT 5 fluid in any racing applications. DOT 5 fluid is not hygroscopic, so as moisture enters the system, it is not absorbed by the fluid, and results in beads of moisture moving through the brake line, collecting in the calipers. It is not uncommon to have caliper temperatures exceed 200 degrees F, and at 212 degrees F, this collected moisture will boil causing vapor lock and system failure. Additionally, DOT 5 fluid is highly compressible due to aeration and foaming under normal braking conditions, providing a spongy brake feel.

So with these issues, why would people choose DOT 5?

Just to save their paint?

Rocky

1/29/1612:07 PM

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