Re: ongoing brake woes maybe not brakes? - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: ongoing brake woes maybe not brakes?
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Posted by Dean (more from Dean) on Tue, 3 Feb 2004 11:35:04 Share Post by Email
In Reply to: ongoing brake woes maybe not brakes? (long), Heath Tucker, Mon, 2 Feb 2004 22:53:07
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Many learn to feather of the brake petal as the vehicle gets close to stopped. The friction factor increases at low swept speeds. And as the pads a bedded in and surface organics are cooked off, this can change as yo have noted. And the petal feel improves to as the pas surface consolates and it feels less spongy.

When new pads and rotors or new pads are fitted on four corners, the brakes can feel very spongy, worse than just doing the front brakes alone.

Some of what you feel is downshifting as you have concluded. When the trany downshifts and you are off the throttle, perhaps the manifold vacuum increases and the brake booster vacuum increases at the same time. Some auto box vehicles have a vacuum pump mounted where the distributor goes which suggests that auto box vehisles can have insufficient vacuum for the brake system.

I have used EBC pads on two vehicles. Uneven organic pad deposits on the rotors can feel like warped rotors. I had this happen once after a panic short hard braking event on cold rotors at 75MPH. I later noticed a problem and I did some repeated pad 'burn in' stops and the problem went away completely. The organics on the rotors were burn and abraded off. If the problem is ignored, I do expect that the uneven heating could create a true rotor warp. I expect that all of this insight is not shared my most and EBC pads could be frustrating and expensive.

posted by 66.142.222...

about brake systems and organic pads & ''warping''

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