e36 evo there goes another set of discs!

[martinnitram]

Is it me or are the standard front discs on 98 m3 not up to the job?
Ive been through 3 sets through warping, 1 set of EBC aftermarket shitters,(be warned these really are wank) and 2 sets of BMW's originals. I almost got the latest pair replaced on the warranty but the dealership noticed ive been using red stuff pads and wouldnt honour it.

The car does do the occational track day nothing to heavy though and just a bit of back road blasting.

Im now trying to get hold of a set of AP big brakes if any body has got a set going let me know, or i may have to dig deep and buy a new set.

any body else had any thing like this?????

[Neil.D]

BMW brakes have always been weak.
If you go through them that quickly I would suggest getting an AP conversion for a grand or so.

[breezy]

martinnitram said:

Is it me or are the standard front discs on 98 m3 not up to the job?
Ive been through 3 sets through warping, 1 set of EBC aftermarket shitters,(be warned these really are wank) and 2 sets of BMW's originals. I almost got the latest pair replaced on the warranty but the dealership noticed ive been using red stuff pads and wouldnt honour it.

The car does do the occational track day nothing to heavy though and just a bit of back road blasting.

Im now trying to get hold of a set of AP big brakes if any body has got a set going let me know, or i may have to dig deep and buy a new set.

any body else had any thing like this?????

To be honest I suspect that the issue is your pads.

Very rarely do disks actually warp through hard use. Instead, pads sometimes leave deposits on the disks and it is this that you feel through the steering - leading you to think that the disks are warped. In fact, I'd be willing to bet money that the disks themselves will clean up if you change to a decent pad and bed them in properly.

On the subject of redstuff - I have used this compound on track before and I can quite reliably report that it is rubbish. Absolutely not up to the job.

I did one day at Donington Park (I am not heavy on brakes by any stretch of the imagination) using redstuff and the pads literally fell apart. This was ~3 years ago so the compound may have changed but it was clear that they had overheated - they had started to flake off the backing plate and turn white(!)

Yellowstuff is much better - still not a hardcore track pad but much more able to stand up to track work and still very cheap.

Incidentally, unbalanced wheels and play in the steering (tie rods in particular) can all have the effect of exaggerating movement and making any 'warped disk' feeling much more pronounced.

Some interesting reading from StopTech:
http://www.stoptech.com/tech_info/wp_warped_braked...

[muckymotor]

The evo discs are pretty good and as posted above suspect it's your pads to blame.

I did 150 miles around Cadwell in my M3 fitted with Pagid Yellows and the brakes were as strong on the last lap as on the first.

[Frik]

breezy said:

Very rarely do disks actually warp through hard use. Instead, pads sometimes leave deposits on the disks and it is this that you feel through the steering - leading you to think that the disks are warped. In fact, I'd be willing to bet money that the disks themselves will clean up if you change to a decent pad and bed them in properly.

It's light braking that tends to warp the disks. Motorway driving is terrible for this.

[martinnitram]

breezy/ I dont think its the steering components ive checked all obvious bushes, rack, wheel bearings and can't find any fault with either, read the item at stop tech cheers, but still think its discs at fault. During track days ive done on this set of discs (two) they performed well it was only a week or so later when driving hard i noticed they felt warped, the red stuff pads were fade resistant although they are ready for replacement now, but ill do that when i change to new discs, most likely to AP if i can find a set.

[martinnitram]

Something else just thought of, brake pedal pulses as well as steering wheel judder and its not the buzzy grinding feeling you get with the pad deposits ive had that before with OE pads.