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Ceramic brake question

C

cueman

New member
hi, picked up my 2008 997tt last week from mid Sussex OPC. Am really pleased with it (understatement!). Amazed how totally different it is to the 997S (and 996tt), in all ways.. clutch , steering, brakes, suspension...

Anyway, the brakes are incredible, the best brakes on a road car i've ever experienced. On the 996tt I put gt3 discs/calipers on, and when hot they screeched and squeeled for ages. The ceramic brakes on this car are different in that respect, but they do still squeel: after a period of hard braking, when i come to a halt say ahead of a roundabout the brakes often squeel, but after just a couple of light applications of the brake, it goes away and they are silent (unlike my gt3 brakes on the 6tt).

Is this normal?

Thanks
Nick
 
Yep. All sounds like normal behaviour to me.

Intermittently squealing brakes is a small price to pay for the vastly improved performance of PCCB's

Just check you have no damage, cracking or wear to the rotors, as these are fragile.

Congratulations on your new car.

It's now time to join the Club and enjoy the fun! [:)] ( A lot of good 997 Register events coming up. [;)])

Regards,

Clive.
 
That's great, thanks v much Clive.

Yes, i've been a member for years n years... but it says i'm a guest for some reason.

The region have a lunch on the 30th, so that'll give the car a decent run, and yes definitely up for 997 register events etc.

cheers
Nick

ps. i just wanted to check they were ok... i dont mind the noise - at least people know i'm coming!
 
Just as Clive mentioned it is normal behaviour and I cannot find any consistency when it happens. Sometimes it happens on a cold day, other times on warmer days, but definitely after applying the brakes a lot, like on a circuit or Autobahn driving. Also noticed that the travel in the pedal extends into the footwell for breaking under heavy use. So, I will probably have the breakfluid changed next time the car is in service to a more race consistent pressure point. Not sure if that is normal with the OPC standard break fluid.
Enjoy the ride and I agree that characterics of the TT are completely different and the performance is off the chart.

Max
TT 997.1
Gone - 997C2S
 
Thanks Max. I did ask at the OPC for an assessment of the wear on the discs/pads before i bought it (10% and 30% respectively was their answer). And i raised the Q about noise with them yesterday... but just wanted to get an impartial take on it!

cheers
Nick
 
Mine started doing it after a recent rack day and now squeal at that slow speed as you come to lights, spped bumps etc, so the same
 

ORIGINAL: maxtraeger

......Also noticed that the travel in the pedal extends into the footwell for breaking under heavy use. So, I will probably have the breakfluid changed next time the car is in service to a more race consistent pressure point. Not sure if that is normal with the OPC standard break fluid......
Max
TT 997.1
Gone - 997C2S
Click to expand...

That's certainly not normal and needs checking out asap as it's unlikely to be merely defective brake fluid - unless it has boiled at some stage.

The obvious checks are to pads, rotors and servo. Also, there's a servo pump that might be playing up.

Regards,

Clive.
 

ORIGINAL: Lancerlot


ORIGINAL: maxtraeger

......Also noticed that the travel in the pedal extends into the footwell for breaking under heavy use. So, I will probably have the break fluid changed next time the car is in service to a more race consistent pressure point. Not sure if that is normal with the OPC standard break fluid......
Max
TT 997.1
Gone - 997C2S
Click to expand...

That's certainly not normal and needs checking out asap as it's unlikely to be merely defective brake fluid - unless it has boiled at some stage.

The obvious checks are to pads, rotors and servo. Also, there's a servo pump that might be playing up.

Regards,

Clive.
Click to expand...

I am with Clive there - unless you've boiled the brake fluid or have some water contamination that is not normal. The whole point with Ceramics is once they are warm they should be very consistent.

I'd get it checked out ASAP if I were you, just for peace of mind, having been there - brake failure (even if its cause one boiled the brake fluid off on the Stelvio Pass) on one of these machines is not funny.


 

Hi Nick,

Mine don't squeal, mine hoot after heavy braking and moving at slow speeds. Seems more noticeable inside the cabin than out. The other thing I have to watch out for, is that if you've been driving in heavy rain without braking for sometime, and then you go to brake, there is that few milli seconds when nothing happens. There's plenty of firmness to the pedal, just no braking. It all recovers very quickly with plenty of retardation, but worrying all the same. Never had this before with conventional rotors and pads.

cheers
Mike
 
Thanks Mike. A mate has a 996tt S with pccb and he warned me that after washing the car u have to watch the initial braking!

cheers
Nick
 
I believe PCCB's are now at Level 3 and the latest kit appears to have addressed many of the issues associated with earlier systems - but they can still be intermittently noisy. [8|]

Regards,

Clive.
 

ORIGINAL: cueman

................ after washing the car u have to watch the initial braking!
Click to expand...

To be honest thats the same with any type of disc braking system. Just takes a short distance to dispel the water from the surface of the discs.

Overall my PCCBs are excellent, but to be sure I am careful whenever they are cold or wet.
 
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