Lost braking efficience

[qball]

I've had new rear pads and rotors fitted. when they were looking at the old ones they thought they weren't working that well and suggested either something blocking the lines or brake cylinder replacement. I know its a bit hard to tell me without seeing the car but what should i look at doing to fix this. The fluid has been replaced in the last 1000kms

Thanks

 

[Jonson]

How well did they bed them in? If you don't bed brakes in properly, they never have the right samount of friction between the surfaces. It sounds harsh, but give the brakes a very hard time and see if it gets better.

 

[naughtika]

you've bled the brake fluid right?

 

[Jonson]

No oil or bad residue that will reduce friction on pad or disc?
Get them to do their job and diagnose it before they just start charging you $$$ to replace shit in the hopes it fixes it.

 

[qball]

ok cheers

 

[sn00ze]

My thoughts are:
If there was something blocking the lines depending on the method of bleeding it would have been very obvious.
And what did they actually see to tell you they suggest that they're " not working that well" ?

 

[Kenneth]

Another thing to keep in mind is that if the pads are rated at a higher temperature, often that comes at the expense of cold bite. As such, the brakes can feel quite numb until warmed up at which point they grip like shit to a blanket.

I had a set on my first VR-4 which were always numb when cold. Was pretty cool to pull up from 200+ with the brakes smoking and disks almost transparent though

Also +1 for bedding in properly. I have always found that until you properly heat cycle them (normally to the point of smoking and smelling like burnt clutch) they will not be at their best.
Unfortunately this is one of the problems with Brembos. Unless you really thrash them or track them (or perhaps have an auto, can't comment on that score) they hardly ever get up to proper operating temperature. Mine are usually cold enough that I can hold the disk when I get out of the car.