New discs already warped!

Tesla,

When I used my S2k on the track with the discs and pads I had the issue with the whole car shook violently under heavy braking, so it can be the pad material buildup causing it.

Give what I said a go and see how you get on.

Regarding using cheap discs... if its good enough for people doing trackdays in S2K's both in europe and the US to say unless your getting some super duper top of the range 1k carbon disc just to get a cheap blank I'll take their word for it...

I used bremtech discs on my s2k when I replaced the DBA items, and recently fitted them to the front of my focus. They cost about £50 for the s2k and about 25-30 for the focus for a pair from Brakes International. They work absolutely fine and coped perfectly well on track days.
 
I would carry on driving with them TBH. Perhaps try a couple of hard slow downs (but don't stop) could clean the discs off. I had trouble like this on my old car and just thought "F it" cos i couldn't be bothered to replace the discs again and after a couple of weeks everything cleared up and i had no problems after.
 
Conanius said:
Tesla,

When I used my S2k on the track with the discs and pads I had the issue with the whole car shook violently under heavy braking, so it can be the pad material buildup causing it.
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Plausible I think, it can also be the disk overheating.

I echo your comments on the cheap disks, fine on the track and cheap which is great bonus.
 
Didn't do any special bedding in procedure after fitting the new pads and discs.
Did clean the discs up before fitting though.

I will have to take a picture of my rear callipers to demonstrate the clips I refer to.
 
Tesla said:
I will have to take a picture of my rear callipers to demonstrate the clips I refer to.
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You mentioned they look like little springs? If so, my guess is that they're for handbrake operation (ie. when you pull the HB up, it pulls the lever and pushes the piston out to grip the disc. When you release the handbrake the spring is there to return the lever to its normal position and releases the pistons hold of the brake disc.)

EDIT: oh, just read you were talking about the actual pad having a spring on it rather than the caliper :o
 
JRS said:
You said that warped discs don't exist. They do, it's just that in the vast majority of cases it's pad material on the disc surface rather than warping that's occurring.
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I didn't say they don't exist at all, I said they don't really exist. This much is true, I'm not going to argue with an experienced brake tech from a top flight brake company who says he's NEVER seen such a thing.
 
Clarkey said:
I didn't say they don't exist at all, I said they don't really exist.
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Well, I'm just a simple fella from out in the sticks, but I always thought that saying that something 'doesn't really exist' is pretty much akin to saying 'it doesn't exist' ;)

Clarkey said:
This much is true, I'm not going to argue with an experienced brake tech from a top flight brake company who says he's NEVER seen such a thing.
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As I acknowledged, it's pretty rare. But 'rare' and 'doesn't really exist' aren't quite the same IMO!
 
Obviously there has been a misunderstanding of what I said.

Anyway whatever, warped discs are little more than a myth so even if I said straight up that they do not exist at all then you'd find it hard to disprove that.
 
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