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Old 10-17-2019, 05:07 PM   #1
rymaggi
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Join Date: Jul 2010
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Location: Sacramento, Ca
Default Intermittent / rotational brake squeal - Track Pads

Car:

2016 STI

Brand new Black Rotors

Brand new G-Loc r12/r10 F/R

Did a track day at the end of September and am doing one next weekend.

I've developed and had (over the past 2 weeks) noticed a very audiable brake squeal coming from both front wheels. This squeal is the same pitch and tone as when i'm braking with my foot pressing the pedal. However, it's completely in sync with the rotation of the wheels and is more a quick chirp.

The pads were bedded in properly, they are not worn down, i cleaned everything when i installed them and greased properly (Did not add brake quiet gel).

Normally i would have changed back to my DD pads, but with another even 3 weeks later i felt it was fine to be lazy as i don't drive this car far to work (maybe a couple miles each day), but i want to make sure the brakes are fine and there isn't any potential issues.

The wheel bearings are good, and the CV boots perfect.

Wanted to see what people had to say about the chirping during normal driving and without the brake pedal pressed. It essentially is going off during all driving and continues a rotational volume audiable level during braking (When pressed really hard, the squeal is more consistent)

I never pull the E-brake after a session either and there's no visual indication that a pad was "baked" into the rotor.

Anyways, it may just me being paranoid and i know track pads squeal like a mofo, it's just the fact that they're squealing without being engaged by my foot.
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Old 10-18-2019, 10:56 AM   #2
Patrick Olsen
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Location: Where the Navy sends me...
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1996 Impreza coupe

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My guess is that the street driving has left some slight uneven pad deposits because the pads aren't getting up to proper temps. Hopefully once you hammer on 'em on track they'll be fine.
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Old 10-20-2019, 05:42 PM   #3
rymaggi
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Chapter/Region: BAIC
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Quote:
Originally Posted by Patrick Olsen View Post
My guess is that the street driving has left some slight uneven pad deposits because the pads aren't getting up to proper temps. Hopefully once you hammer on 'em on track they'll be fine.
That's kind of what i was thinking as well.

Gonna be order G-Loc's DD pads to swap in so i can keep the same type of pad material on the rotors.
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Old 10-27-2019, 10:23 AM   #4
Norm Peterson
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'08 Mustang GT (the toy)

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If you can occasionally (and safely) use your brakes a lot harder than the average street driver normally uses his brakes, you may find that even '12-level' pads don't have to always be noisy. This may even help maintain uniformity of pad depositing. That's been my experience with the occasional track toy that I've never done the street-pads-to-track-pads-back-to-street-pads swapping exercise on, anyway.

FWIW, I've also found that it's the low-energy, gentle braking events that make the most noise. Probably not enough force being applied against the pads to keep them from doing a lot of vibrating.


Norm
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Old 11-01-2019, 01:43 PM   #5
rymaggi
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Quote:
Originally Posted by Norm Peterson View Post
If you can occasionally (and safely) use your brakes a lot harder than the average street driver normally uses his brakes, you may find that even '12-level' pads don't have to always be noisy. This may even help maintain uniformity of pad depositing. That's been my experience with the occasional track toy that I've never done the street-pads-to-track-pads-back-to-street-pads swapping exercise on, anyway.

FWIW, I've also found that it's the low-energy, gentle braking events that make the most noise. Probably not enough force being applied against the pads to keep them from doing a lot of vibrating.


Norm
You're 100% right on that low-energy, gentle braking events that make the most noise. I leave to go to work at 5:15am and when its in the 30's, we have a steep driveway, these things are horrifically loud its honestly is crazy.

I still have the rotational chirp or squeak when not on the brakes. Maybe i need to take everything a part and clean everything and add brake quiet? not sure, but the pounding i gave them last weekend didn't help lol

I'll be swapping in DD pads, it only takes about an hour and it's a chance for me to clean everything since i like cleanliness. I actually used my Project Mu B-Force front pads and EBS yellows during my first track day and they actually did a super good job i was legitimately impressed.
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