Brembo GT Brakes are LOUD! Any other Brembo GT users have experience?
 

I installed the Brembo GT brake kits front and rear on my car a few months ago. As soon as I installed them, I noticed they squealed very loudly when applying medium pedal pressure. I figured the noise was just because they were new pads and it would subside over time. It has been several months now and ~500 miles, but they are just as loud as ever. I know they are racing brakes, but the squeal is very loud. I am sure other cars on the road can notice.

I found this video where they apply grease to the shims on the Brembos on a Scat Pack to make the noise go away:


https://www.youtube.com/watch?v=JtxaaEcSljI
I didn't apply any grease during installation. I guess I assumed it would already be greased because the calipers/pads/etc came per-assembled. However, I am not sure this should even be necessary. The noise coming from the Scat Pack Brembo's is not nearly as loud as mine.

I contacted CSG and they said it is the pads. They suggested switching to Project Mu Type-PS pads to reduce the NVH. But they noted that these pads will have considerably less performance than the currently installed Brembo pads. This is not a track car, it is my daily and I do a few Auto-X events per year with it. So I am concerned about performance, specifically initial bite, so I would rather not have to downgrade the pads if I don't have to.

I know the Brembo GT kits are popular here. Do any other users have experience with this issue? Did you apply grease to the pads/shims? Did the noise eventually go away?

Pics for attention:
https://i.imgur.com/8SJNQJ3.jpg
https://i.imgur.com/NuVTSGA.jpg
https://i.imgur.com/rKp5uyy.jpg
https://i.imgur.com/6wNvK89.jpg

Did you bed in the pads properly after the initial install?

What pads are you on now? Some are just loud no matter what you do.

"daily and I do a few Auto-X events per year " = Fedoro DS2500

The pads that came with the Brembo GT kits. I think they are called Brembo Dual Purpose.

Do they make Fedoro DS2500 pads that fit the Brembo GT calipers?

which GT are you running?
1H4.6005A
1H1.7003A

Does it only happen while they're cold or even after several miles / minutes of driving + braking?

Looking over the manual, it suggests 20 60mph - 20mph stops and 10 stops from 80 mph. I only did a handful of ~60mph - ~20mph stops after initial installation. I can try and follow the full procedure and see if it helps. It is difficult to find somewhere to attempt this around here. Hopefully it is not too late.

Front: 1H5.6005A1
Rear: 2E5.5003A1

It seems worse when they are cold but the squeal persists after prolonged driving. It does not help that it has been winter up here the entire time they have been installed.

My guess is the cold affects it too. My brembos with endless pads definitely make noise for longer this time of year and this is California. During warmer months it depends on if the brakes have been in the sun or not.

Assuming its the CSG spec GT (1H4.6005A I think?). Then the CSG Spec CP pads are supposed to be comparable to the Fedoro DS2500.

That is an above average amount of bedding required, but makes sense for this caliber of BBK.

It is not "too late" by any means, you can try the bedding process again at your leisure. However, I agree with your assessment, it'll be tricky to find a place where you can safely do those 80 to ~5 stops.

Also, it's kinda nerve wracking since you're supposed to brake extremely aggressively, just before the point of engaging ABS. Many people aren't comfortable braking that hard and feeling the forces. IMO, and speaking from experience, it can be kinda disconcerting.

Anyway keep us updated if you decide to give the bedding a go or switch up the pads.

From a fellow owner, all I have to say is welcome to the Brembo GT life. Normal by most accounts. Even OEM PP Brembo owners have commented about increased noise.

I've had mine for about a 20 months (> 20k miles and > 10 track days) and am usually driving on the provided OE-spec pads on the street. I swap out to dedicated track pads for road courses.

I distinctly remember them being squeaky when I first got them (some lady even asked if something was wrong with my brakes), but having dailied track pads for 2 years prior to that it didn't bother me. They've gotten a little quieter as they've aged, but they still make noise from time to time. Noise was excessive on my track set over the first couple of uses, but they have also since quieted down.

Speaking from experience: no amount of bedding changed initial noise. At the time, I did a couple of full bed-ins to temperature on the OE-spec pads (10x 60-30MPH, cool, then 10x 60-10MPH; hot enough you can smell the compound, sometimes see smoke), but the noise always came back not too long after. These days I don't bother with a comprehensive bed-in on the street set. I don't use any brake grease as it generally burns off at the track anyway. I think noise characteristics will start to improve once you really wear into the rotor material, but obviously that just part of normal brake usage (I'm about 0.7mm into the rotor thickness).

I have a couple of theories on why the GT may be more susceptible (wear-off of the zinc coated rotor, presence of slots), but they are just speculation. I'm interested to see if things are any different with standard blank rotors, but I have my eyes set on 2pc rotors down the road
:burnrubber:

Off topic for this thread, but what 2-piece rotors are you looking at? I was wondering if the 2-piece Girodisc rotors would fit. They make some in the exact same dimensions as the GT rotors.

It's between Girodisc and Project Mu SCR-Pro for me. It's worth noting that the Project Mu 2pc rotor hat adds 1mm of offset

I've seen on the forums that people have had good success with Girodisc.

Brembo might offer a 2pc option, but it's hard to find info on them. Paragon also has an offering

Not keen on DBA 5000, as they provide relatively low weight reduction benefit compared to other alternatives

CP is in the same category as DS2500 similar to Yokohama A052 is in the same category as Falken RT615K, but with a different performance profile. The Brembo GT kit is more rigid than the OE Brembos so the resonance profile is different for performance and street pads.

I tried some carbon fiber stickers and they eliminated the noise, but on the first trackday they melted and smelled burned��

Now I'm going to try DBA discs, I expect a lot of noise.

https://i.imgur.com/00r1ZkJ.jpg

By the way, did you remove the back shield from the disc?

Do you mean the dust covers? I installed the OEM PP dust covers in place of the stock ones.

they are as the pads work perfectly parallel to the rotors. it is a feature, not a bug.

I do own this kit and my experience was exactly the same as yours. Loud AF on Brembo supplied dual purpose pads. I've switched them to DS2500 and it's much less noisy right now even without any kind of friction/noise reducing pads installed. Brembo b-quiet didn't help at all too. This topic has been over the forums and Reddit many times. Here's my reply to one of the Redditors some time ago
https://www.reddit.com/r/ft86/commen...eb2x&context=3

Thank you for saving me the effort of removing the pads and greasing them. I was actually looking at giving the Brembo B-Quiet a shot.


It sounds like I will be getting some new pads in the near future.