Grumbling brakes after Donington trackday

[B9Boy]

I did the Donington trackday on the 29th.

Ive now got a nasty sounding grumble and vibration through the brakes. I used to have an Alpina BMW I used for trackdays and that would warp a set of brakes every trackday so I know what warped discs feel like and the RS6 brakes dont feel warped.

Are they gonna get better as I gently use them on the road or are they knackered??

[BigMo]

could be warping. Did you use the handbrake at all whilst at Donny (when parked up)?

[B9Boy]

No I made sure I didnt use the handbrake at all whilst I was there to avoid heat spots. I'm not getting wheel wobble when I brake just that horrible sound you get when you hit the anchors hard from say 120mph on a motorway only it's doing this regardless of speed and no matter how gentle I am with the brakes.

[SteveH]

To me it sounds like the track braking has left deposits of pad on the discs, as you say its a similar feel but not warped discs.

[B9Boy]

Cheers Steve, So that should clear up with a bit of normal road use perhaps?..or is there something I can buy to spray on to clean them?

[SteveH]

Never had to deal with it myself, could call one of the tuning houses for some top-tips which I am sure they wouldnt mind giving. There is some guidance on the net to save you spending best part of a grand on new discs & pads, my favorite site for brake tips is stoptech: http://www.stoptech.com/tech_info/wp_padremoval.shtml

[Rupert]

Try wire wool to clean the discs.

[PhilT]

I would not drive the car anywhere until you get the pads out and check them. Probably worth getting a spare set, just in case.

[B9Boy]

The pads had only done 1,000 miles before the trackday so Im expecting there to be tonnes of meat left on them (Ill have a peek today though just to check).
How are yours after the 29th Phil??

[PhilT]

Mine are fine, but I tend to be very mechanically sympathetic in the way I drive on track. I prefer to sacrifice lap times instead of wear and tear.

[BigMo]

They should wear back to normal. Give them about 200 miles. Sounds like they were cooked on the track. Any blueing on the disks?

[B9Boy]

Theres no blueing to the discs and they appear normal visually. I dont think with these cars you need to abuse the brakes to make them work hard- 2 tonnes takes a lot of stopping!!!

[B9Boy]

What the hell are these things up to....today Ive got the loudest squeeling youve heard this side of a pig gangbang!!!! They sound embarrassing!

[david7m]

120mph eh

I'd get them checked, if they fail, your f**ed! Excuse the language...

I got WD40 on my motorbike discs that wouldn't burn off, so I got some brake cleaner from Halfords, about £5 for the can ....

Dave

[B9Boy]

Hi Dave- of course when I say motorway I mean closed circuit officer:) lol

I will give it another day and then start to raid Halfords shelves for some brake cleaner. You just spray it on and drive do you - I dont have to take wheels off or anything like that do I??