This is topic Brake vibrations in forum Tech Talk at Northern California Ford Owners  .


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Posted by Becca (Member # 7004) on :
 
I was driving on hwy 9 on Saturday in my '91 GT and the car brakes fine at all times, but when I would start to push the car and brake harder before the turns, once the brakes got hot (after hard braking for awhile) the brakes would vibrate/pulse the entire length of pedal travel. The car would still slow down as normal though. I would back off and slow down and give the brakes a breather and then everything would go back to normal. It seems to only do that when I'm on the brakes repeatedly for a while.

I autocross the car regularly and never noticed a problem with the brakes, but then again each lap is only about a minute long. I usually don't ever drive her on the street.

Any thoughts/suggestions?

My first thought was warped rotors, but the vibrations aren't always there.
 
Posted by Blind (Member # 3052) on :
 
that's material from the pads getting so hot they are getting left on the rotors, I had that happen a lot to my stock brakes, especially in the front after I put the 73mm calipers on.

here's how my rotors looked before I put the new brakes on btw, notice the heat spots left from the pad material.

-
 
Posted by Becca (Member # 7004) on :
 
I'll take a look at them tonight and see if I notice anything.

The pads are HP Plus.
 
Posted by Blind (Member # 3052) on :
 
quote:
Originally posted by Becca:
I'll take a look at them tonight and see if I notice anything.

The pads are HP Plus.
same pads that I had on my car, work great until they get really hot, then the small rotor size just can't cool the brakes off enough.
 
Posted by Jdub07 (Member # 2728) on :
 
are the pads metalic or ceramic? Go with semi metalic pads [patriot]
 
Posted by Becca (Member # 7004) on :
 
HP Plus pads are Ferro-Carbon

Rotors are not warped, no sign of pad residue being left on the rotors

[Confused]
 
Posted by Jdub07 (Member # 2728) on :
 
quote:
Originally posted by Becca:
HP Plus pads are Ferro-Carbon

Rotors are not warped, no sign of pad residue being left on the rotors

[Confused]
From the mouth of GOLD MEMBER/FINGER can't remember "Ishint dat veird"

[ July 24, 2007, 12:52 PM: Message edited by: Jdub07 ]
 
Posted by Blind (Member # 3052) on :
 
quote:
Originally posted by Becca:
HP Plus pads are Ferro-Carbon

Rotors are not warped, no sign of pad residue being left on the rotors

[Confused]
well you wont see the residue unless you felt the pulsating right before you pulled the wheels off, mine would clean themselves off and the pulsating wouldn't come back until I heated them up again.

[ July 24, 2007, 08:27 PM: Message edited by: Blind ]
 




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