Hello all, looking for an advice.
went to track over the weekend, high speed track, 130mph plus(California Auto club speedway in fontana), first a few laps, brake felt fine but after 4 or 5 laps, I started noticing vibration when braking and only gets worse. After cool down, it felt find but again, after 4 or 5 laps, doing the same.

I have 2 piece performance friction front rotor, ebc yellow brake pads, running R compound tire.
any thought?
Feels like rotor is warped only when it's not.

 

Hey, thats my home track!

My guess, its likely pad deposits causing the Vib. I too was getting a braking Vib & finally changed out my heat checked Centric rotors & replaced w/new high carbon Centrics & new Stop Tech pads for the street (braking Vib gone)

Just my .02

 

Trash those junk EBC pads and get some good track pads like Raybestos ST43/47 or the like.

 

I think there is more to it? I just fitted the 2 piece dba brakes, which arnt cheap plus a set of new ds2500 pads and i was getting vibration pulling it down from 120 mph on the track it didnt seem to happen at slow speeds or when i have it on the street

 

DS2500's are notorious for uneven deposits when hot (like on track).

Judder is 99.9% of the time uneven deposits.

 

hahhaa. I see. Thanks. Ebc was ok on streets but not good enough for track. Will try raybestos. Thanks.

 

Pad deposits! Use 1) Pagid Yellows (RS29s) or PF01 (or equivalent) 2) Motul 660 or Castrol SRF and 3) PF 2 piece rotors up front. I spent several years messing around with different combinations for heavy track work and found this combination worked best. No brake problems since.

 

ST43s are the most recent pads I've tried and so far my favorite. This is between Hawk DTC60, CL RC5, and now these. I hear Carbotech is even better, but I can't afford them at this time

 

deposits are your enemy