Brake proportioning valve. |
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Brake proportioning valve. |
914Toy |
Dec 7 2019, 03:11 PM
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#1
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Senior Member Group: Members Posts: 727 Joined: 12-November 17 From: Laguna beach Member No.: 21,596 Region Association: Southern California |
Like most of our cars, the brake proportioning valve is 45 to 50 years old. While it's design and action is relatively simple, - holds the hydraulic pressure at a factory determined maximum value (550lb/square inch?) while under pedal pressure, the probabilities of function failure must exist - whether through wear or contamination.
In my case, my brakes work well and when bleeding them all four calipers appear to experience free flowing brake fluid. My proportioning valve does not leak and there are no signs of abuse, or that it has ever been "serviced", but the latter is hard to tell. My guess is it still works or is "seized" and works as a simple T connection for the three brake lines. I have refurbished stock rear brakes and have just installed Boxter front calipers on 911 Carrera suspension. Brakes are much improved and I can't get the rear brakes to slide under hard braking, suggesting the more effective front brakes "overpower" the rear brakes such that a proportioning valve is no longer necessary. Any comments will be welcome. |
rgalla9146 |
Dec 7 2019, 07:11 PM
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#2
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Advanced Member Group: Members Posts: 4,624 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None |
Watch your terminology.
It's known as a 'brake pressure regulator' I was recently corrected by Mr. Shea himself. |
Superhawk996 |
Dec 8 2019, 10:14 AM
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#3
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914 Guru Group: Members Posts: 6,469 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
Watch your terminology. It's known as a 'brake pressure regulator' I was recently corrected by Mr. Shea himself. (IMG:style_emoticons/default/bootyshake.gif) (IMG:style_emoticons/default/laugh.gif) Don't disagree. You are correct. It is the equivalent of everyone calling anti-roll bars -- sway bars. I certainly don't way sway! (IMG:style_emoticons/default/av-943.gif) |
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