[///M1]

Originally Posted by mlhj83

The sales guy is wrong, an even layer of pad deposit on the disc and a hot brake pad will make the pedal slightly softer (which is normal), but uneven brake deposits make brake judder. Listen to me, I've developed custom brake discs (as a customer) with AP Racing and have had extensive dealings with friction engineers. Mechanics and sales people aren't engineers. Get a set of uprated pads and take it from there. Once the discs have been cleaned, but brake judder persists, only then can anyone definitively say that discs are warped, which is very very unlikely. You would need to get uprated pads anyway to prevent future occurrences of this problem, so why not start with that and see how it goes. It's certainly cheaper than getting a full set of new discs.

Here is a good article from StopTech which I'm sure many would agree is a reputable brake company.
http://www.stoptech.com/technical-su...nd-other-myths

I am with mlhj83 on this all the way.

There are a lot of 'myths' involving disc warping. Having the privilege to know one of the best brake experts personally Dave Zeckhausen (and having installed a StopTech BBK with him on my E39 M5), here are a few good reads i can offer.

http://www.centricparts.com/files/Ce...ake%20Disc.pdf

OP: try this procedure for getting rid of the pad deposit, you may want to do it a couple of times but allowing a good amount of time for cool off in between:

http://www.zeckhausen.com/bedding_in_brakes.htm

And something for the track:

http://www.zeckhausen.com/avoiding_brake_judder.htm