Brake judder and Brake pads
Thread Starter
Cruising
Joined: Feb 2017
Posts: 14
Likes: 1
From: Freeland WA
Brake judder and Brake pads
Thanks to all who have offered explanations for brake judder. I have a 2022 C8 Z51 with stock calipers and Brembo OEM pads. I have judder during track use that increases with increasing laps but does not occur during street driving. What I am looking for is the experience of those of you who also have HPDE induced judder with OEM pads. If you tried non-OEM pads, please reply with ID of pad tried and if it reduced/eliminated judder. I want to see if pad choice will help before investing in new rotors/calipers, etc. There are a lot of pad options so I am hoping the Forum's knowledge will narrow down my options.
Safety Car
Joined: Jun 2004
Posts: 3,580
Likes: 778
From: panama city beach florida USA
St. Jude Donor '09
explain a little more the symptoms .......does the anti lock brake warning come on the dash when it happens , does the steering wheel vibrate under braking [front brakes] or do you feel it in your seat [rear brakes ] . Warped rotors can be more pronounced hot high speed stops
Burning Brakes
Joined: Jun 2014
Posts: 1,105
Likes: 139
Funny you should ask! 
I have a post somewhere last year where I went though all sorts of pads, rotors, even changed the front wheel bearings trying to figure this out! Ultimately this year, a few weeks ago, I decided to just trade it in for a Z06...
Here's my old post: https://www.corvetteforum.com/forums...on-issues.html
However bottom line, from what I could gather is that the ABS is very sensitive, and unless you are in RACE 2, where almost all "nannies" are off, ABS is very aggressive. Coming from a C7 Z06 track only car, it's a world of difference in braking with the C8.
I only track my car, so of course any street driving there is no "judder"...
I even, over black friday last year purchased AP racing calipers / rotors to change out for this year / season, but instead went for the Z06, so never got to install / use the AP racing to see if those helped.
I had tried stock rotors / pads, Girodisc rotors, EBC rotors, DTC pads, nothing helped.
I have a post somewhere last year where I went though all sorts of pads, rotors, even changed the front wheel bearings trying to figure this out! Ultimately this year, a few weeks ago, I decided to just trade it in for a Z06...
Here's my old post: https://www.corvetteforum.com/forums...on-issues.html
However bottom line, from what I could gather is that the ABS is very sensitive, and unless you are in RACE 2, where almost all "nannies" are off, ABS is very aggressive. Coming from a C7 Z06 track only car, it's a world of difference in braking with the C8.
I only track my car, so of course any street driving there is no "judder"...
I even, over black friday last year purchased AP racing calipers / rotors to change out for this year / season, but instead went for the Z06, so never got to install / use the AP racing to see if those helped.
I had tried stock rotors / pads, Girodisc rotors, EBC rotors, DTC pads, nothing helped.
Burning Brakes
Joined: Nov 2022
Posts: 1,064
Likes: 1,122
From: Western Mass
I've tracked my '23 z51 with stock rotors and pads and with girodisc rotors and stock pads. No judder in 30+ track events. I've since switched to Carbotech xp12s but haven't been on the track yet. I suspect uneven pad transfer on your rotors. I'd DA them with 80 grit and re-bed the pads.
Burning Brakes
Joined: Nov 2022
Posts: 1,064
Likes: 1,122
From: Western Mass
Thread Starter
Cruising
Joined: Feb 2017
Posts: 14
Likes: 1
From: Freeland WA
Brake judder and Brake pads
I've tracked my '23 z51 with stock rotors and pads and with girodisc rotors and stock pads. No judder in 30+ track events. I've since switched to Carbotech xp12s but haven't been on the track yet. I suspect uneven pad transfer on your rotors. I'd DA them with 80 grit and re-bed the pads.
Burning Brakes
Joined: Jun 2014
Posts: 1,105
Likes: 139
https://www.corvetteforum.com/forums...post1608993371
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