Heat spots and groaning noise

[Amaru]

I had some DBA 4000 discs and RB74 pads installed on the front of my car (R32 GTR) and the rear discs machined and new pads installed not long ago. They were great, however the discs are getting massive heatspots on them and when braking the front left hand side makes a deep groaning noise (its ok to star with but after about 2 mins of driving it does this, and the brake pedal also feels wierd, not pusling but like you can feel something... ripping?).

I havnt done any sort of overly hard braking on these brakes, just the normal driving around. I actually gave my old brakes a flogging compared to these ones and they never came up with any heat spots or made the groaning noise.

Just after some ideas as to what it could be, and I assume with the heatspots on the discs theyve somehow overheated and are now stuffed? (Or maybe not, I dont know a whole lot about brakes).

Any info would be appreciated.

EDIT: I forgot to mention the car has Brembo front callipers from an R33.

[Sydneykid]

Hi Amaru, this is what we would do on a race car;

1. Check calliper bolts

2. Bleed brakes, make sure to change all the fluid

3. Scuff the rotors and the pads with emery cloth, enough to brake the glaze

4. Run them in again, don't stop with the brakes hot

5. Do another lap of the block slowly before you stop

Hope that helps

[Amaru]

As an update, I just took a quick (and crappy) picture of the discs where you can see the heatspots.

The photo was taken with a camera phone so the heatspots arnt coming up as 'dark' as they are in real life looking at it.

[Sydneykid]

As an update, I just took a quick (and crappy) picture of the discs where you can see the heatspots.

The photo was taken with a camera phone so the heatspots arnt coming up as 'dark' as they are in real life looking at it.

Nothing unusual there, I see that sort of stuff all the time.