Brake vibration after fitting new discs- am I being blagged?

[rallycross]

3000 'miles is a long way.

Could be 300 track days for all they know.

Never buy cheap disks unless you don't mind changing them often.

[thinfourth2]

Are you getting pad knock back?

If your disc is warped then it looks like a pringle so it will push the pads away from the disc. This means you first application of the brakes you have to push the pads back onto the disc.

This is very noticable.

Also what you have described is it getting gradually worse.

Pad pick up on the disc which gives you a high friction bit on the disc gives bad vibration which gradually gets worse and worse as the disc picks up more and more pad material.


My old shed suffered from this as it had a sticky caliper which resulted in some pad pick up. This gave a bad vibration under braking. Now being a cheap skate with a lathe after fixing the caliper i skimmed the brake disc. Setting it up in the lathe i had zero runout before cutting and zero after cutting.

So it sounds like you are getting pad pick-up on the disc but my grammar isn't perfect so my experience is irrelevant. So it must be the copper crystals growing on the hub

[Monty Python]

http://www.powerbrake.co.za/downloads/tech_01_judd...

[SuperVM]

I had this with some Bluestuff NDX pads on D2 discs, though I'm guessing that isn't the pad compound you have. In order to resolve the issue, I had to follow the break-in procedure, which involved sets of six successive stops from 60 mph and a very gentle drive to rest where everything was allowed to cool. I've also had EBC discs with reds on one of my previous cars and they were fine for a few months until I gave them a bit of abuse and thereafter they always juddered on light braking.