Brake Vibration During Spirited Driving Only?

[minman26]

This one has me stumped. My brakes seem fine under 99% of driving (Zimmerman + Akebono Ceramic). Normal driving completely normal. Hard stop fine. Panic stop fine. Pedal feel firm. Only after spirited driving (continuous hard stops / slowing from higher rates of speed over and over) I start to get a slight vibration on what feels like the rear left. Can hear a slight rumble and feels like vibration. Once things cool down it's back to normal.

What could this be? Rotors and pads are relatively new. I'm going to change fluid soon, but pedal never feels mushy so that doesn't seem to be it.

Anyone experience this or know what I should check to resolve?

[sacandagaD]

This one has me stumped. My brakes seem fine under 99% of driving (Zimmerman + Akebono Ceramic). Normal driving completely normal. Hard stop fine. Panic stop fine. Pedal feel firm. Only after spirited driving (continuous hard stops / slowing from higher rates of speed over and over) I start to get a slight vibration on what feels like the rear left. Can hear a slight rumble and feels like vibration. Once things cool down it's back to normal.

What could this be? Rotors and pads are relatively new. I'm going to change fluid soon, but pedal never feels mushy so that doesn't seem to be it.

Anyone experience this or know what I should check to resolve?

Are they slotted rotors?

[sonic32]

This one has me stumped. My brakes seem fine under 99% of driving (Zimmerman + Akebono Ceramic). Normal driving completely normal. Hard stop fine. Panic stop fine. Pedal feel firm. Only after spirited driving (continuous hard stops / slowing from higher rates of speed over and over) I start to get a slight vibration on what feels like the rear left. Can hear a slight rumble and feels like vibration. Once things cool down it's back to normal.

What could this be? Rotors and pads are relatively new. I'm going to change fluid soon, but pedal never feels mushy so that doesn't seem to be it.

Anyone experience this or know what I should check to resolve?

Shitty pads and shitty rotors. The ceramic pads need a lot more clamping to slow down and in return they heat up the rotors a lot more. Metal cycling from really hot to cold and vice versa deforms, or just metal getting really hot will be more malleable and under the pressure from the pad it will slightly go out of balance. Had the same issues with aekebono’s and ECS 2 piece rotors. Swapped to EBC yellows, I get all the brake dust in the world but I don’t have to ride the brakes as hard and as long anymore when stopping from high speeds as I did with the aekebono’s resulting in not heating the rotors excessively


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[minman26]

Are they slotted rotors?
No.

Shitty pads and shitty rotors. The ceramic pads need a lot more clamping to slow down and in return they heat up the rotors a lot more. Metal cycling from really hot to cold and vice versa deforms, or just metal getting really hot will be more malleable and under the pressure from the pad it will slightly go out of balance. Had the same issues with aekebono’s and ECS 2 piece rotors. Swapped to EBC yellows, I get all the brake dust in the world but I don’t have to ride the brakes as hard and as long anymore when stopping from high speeds as I did with the aekebono’s resulting in not heating the rotors excessively
This makes sense. Thanks.