brake fluid flush, procedures? |
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brake fluid flush, procedures? |
TheCabinetmaker |
Apr 20 2004, 03:07 PM
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#1
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I drive my car everyday Group: Members Posts: 8,304 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
I'm going to my novice DE at Hallett raceway in two weeks, and need to replace my dot 3 with dot 4. I did a search but nothing came up. Everything else on the car is up to specs. Whats the best method to do this? Is it just bleeding the brakes till all the fluid is changed? Do I drain the entire system, then refill and bleed, bleed, bleed?
Thanks in advance, Curt |
Curvie Roadlover |
Apr 20 2004, 06:36 PM
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#2
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Two trunks are better than one! Group: Members Posts: 2,025 Joined: 29-December 02 From: Southeast Michigan Member No.: 42 |
I attended a 4 hour brake seminar a couple of weeks ago and learned a ton. Of particular interest were 2 things: 1. 17mm MC puts out more braking pressure than the 19 mm MC, and 2. Don't use a power bleeder, ie. one that pressurizes the resevoir.
1. Reason is the same reason a spike heel will sink deeper into the lawn than a flat heel. Less surface area with the same amount of pressure from your foot will deliver more PSI to the MC. This revelation came as kind of a surprize considering everyone always wants to "upgrade" to a 19 mm MC but what he says makes sense when you think about it. (By the way, he was the brake expert Grassroots Motorsports consulted for its' 914 racecar project. They had already installed a 19 mm MC on the car before consulting him. He made them put the 17 mm one back on) 2. Reason is that pressurized air in direct contact with the brake fluid forces air molecules into the fluid. FWIW The brake guru said vaccuum bleeders were fine to use in his opinion and he was indifferent about speed bleeders. |
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