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Old Jul 19th, 2014, 09:31 PM
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Brake shudder through steering wheel after new discs and pads.

Hi, hope someone can help.

I did a trackday in my 2004 r53 CS, before hand I changed the pads and discs to upgraded Ebc red stuff and grooved and dimpled discs. The car was driven very hard on the day. Since then I have had serious shudder under braking felt through the steering wheel.

I have since replaced the pads for green stuff and had the discs polished using 80grit to get rid of material build up.

Today I polished and cleaned the hub face and inside disc again to make sure there was no run out.

After a test drive I can reveal it's a bit better but the wobble is still present.

Ebc are sending replacement discs on Wednesday.

I'm at a loss as to what else to do really. Discs don't warp before you say! :-)

In summary;
New discs
New pads
Discs cleaned of material
Mounting surfaces polished for run out
Wheels rotated
Wheels balanced.

I'm tempted to go back to standard as there was less drama during braking anyway. These new ebc ones are so noisy and make a grinding noise.
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Old Jul 19th, 2014, 09:52 PM
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First I would try the replacement discs, if it cures the problem then you will know what was wrong
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Old Jul 19th, 2014, 10:03 PM
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Quote: Originally Posted by heathwebbo (original)
First I would try the replacement discs, if it cures the problem then you will know what was wrong

Yes that's good advice. I'll do that first. Quite annoying though.
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Old Jul 20th, 2014, 10:16 AM
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Did you bed the new brakes in before you took it on the track ? My mate had a similar problem on his subaru only a couple of weeks after fitting new discs (I think his were just grooved) he took it back to get it looked at & they replaced his discs it was fine after that but they told him to make sure he beds them in properly
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Old Jul 20th, 2014, 12:00 PM
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Quote: Originally Posted by heathwebbo (original)
Did you bed the new brakes in before you took it on the track ? My mate had a similar problem on his subaru only a couple of weeks after fitting new discs (I think his were just grooved) he took it back to get it looked at & they replaced his discs it was fine after that but they told him to make sure he beds them in properly

Hi, well, I drove 80 miles on them to get to the track if that's what you mean! I guess all will be revealed my Wednesday. I wish I'd left them standard!
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Old Jul 20th, 2014, 08:16 PM
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I would have thought 80 miles was plenty to bed them in. You will probably be ok once the new ones are fitted, I have grooved & drilled on mine & not had any problems although I haven't been on a track with them I have driven it pretty hard though
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Old Jul 24th, 2014, 11:09 PM
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Well the new discs solved the problem. No bite from them yet but hopefully they'll get better. The standard setup was actually very good in hindsight!
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