unusual brake pad wear
08-16-2022, 08:52 AM
#1
Rennlist Member
Thread Starter
unusual brake pad wear
08 GT3
In looking through my wheels on the car (I have not had a chance to remove them and inspect more closely) it appears that my rear pads are gone but my front pads don't seem to have much wear at all. Judging by the brake dust buildup this seems completely backward. The setup has been on my car for almost 2 years and 6500 miles including 2 track weekends at Mid-Ohio. Looking at my receipt I installed Girodiscs with Ferodo FRP 3143g and FRP 3075GB, DS3.12 pads. Is this normal or the sign of some type of issue.
In looking through my wheels on the car (I have not had a chance to remove them and inspect more closely) it appears that my rear pads are gone but my front pads don't seem to have much wear at all. Judging by the brake dust buildup this seems completely backward. The setup has been on my car for almost 2 years and 6500 miles including 2 track weekends at Mid-Ohio. Looking at my receipt I installed Girodiscs with Ferodo FRP 3143g and FRP 3075GB, DS3.12 pads. Is this normal or the sign of some type of issue.
08-16-2022, 03:52 PM
#4
Basic Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
If any driver aids are left engaged, it's very common for the rear pads to wear out very quickly. The car uses stability control to try and correct yaw (stop the rear end from coming around). It does so by engaging the brakes on the inside rear wheel to stop the car from rotating. Even if you think the car isn't actively braking, it many times actually is in a subtle manner. We see this on Porsches, Corvettes, BMW...all modern cars. It is completely normal. Turning off all driver aids will typically provide more even brake pad wear on the rear.
With the above said, 911s tend to have far more even front / rear pad wear than we see on other types of cars. That is because of the drivetrain layout. On something like a Honda Civic Type R, you have the engine and driven wheels (a huge amount of weight) at the front of the vehicle. As such, the front brakes take the vast majority of the abuse under braking. On a rear engine 911, the load on the rear brakes is relatively greater, and we typically see more balanced front and rear brake wear.
With the above said, 911s tend to have far more even front / rear pad wear than we see on other types of cars. That is because of the drivetrain layout. On something like a Honda Civic Type R, you have the engine and driven wheels (a huge amount of weight) at the front of the vehicle. As such, the front brakes take the vast majority of the abuse under braking. On a rear engine 911, the load on the rear brakes is relatively greater, and we typically see more balanced front and rear brake wear.
__________________
'09 Carrera 2S, '08 Boxster LE (orange), '91 Acura NSX, Tesla Model 3 Performance, Fiesta ST
Jeff Ritter
Mgr. High Performance Division, Essex Parts Services
Essex Designed AP Racing Radi-CAL Competition Brake Kits & 2-piece J Hook Discs
Ferodo Racing Brake Pads
Spiegler Stainless Steel Brake Lines
704-824-6030
jeff.ritter@essexparts.com
'09 Carrera 2S, '08 Boxster LE (orange), '91 Acura NSX, Tesla Model 3 Performance, Fiesta ST
Jeff Ritter
Mgr. High Performance Division, Essex Parts Services
Essex Designed AP Racing Radi-CAL Competition Brake Kits & 2-piece J Hook Discs
Ferodo Racing Brake Pads
Spiegler Stainless Steel Brake Lines
704-824-6030
jeff.ritter@essexparts.com
The following users liked this post:
Robocop305 (08-16-2022)
08-16-2022, 04:01 PM
#5
Rennlist Member
Thread Starter
If any driver aids are left engaged, it's very common for the rear pads to wear out very quickly. The car uses stability control to try and correct yaw (stop the rear end from coming around). It does so by engaging the brakes on the inside rear wheel to stop the car from rotating. Even if you think the car isn't actively braking, it many times actually is in a subtle manner. We see this on Porsches, Corvettes, BMW...all modern cars. It is completely normal. Turning off all driver aids will typically provide more even brake pad wear on the rear.
With the above said, 911s tend to have far more even front / rear pad wear than we see on other types of cars. That is because of the drivetrain layout. On something like a Honda Civic Type R, you have the engine and driven wheels (a huge amount of weight) at the front of the vehicle. As such, the front brakes take the vast majority of the abuse under braking. On a rear engine 911, the load on the rear brakes is relatively greater, and we typically see more balanced front and rear brake wear.
With the above said, 911s tend to have far more even front / rear pad wear than we see on other types of cars. That is because of the drivetrain layout. On something like a Honda Civic Type R, you have the engine and driven wheels (a huge amount of weight) at the front of the vehicle. As such, the front brakes take the vast majority of the abuse under braking. On a rear engine 911, the load on the rear brakes is relatively greater, and we typically see more balanced front and rear brake wear.
The following users liked this post:
JRitt@essex (08-16-2022)
08-16-2022, 04:04 PM
#6
Basic Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
If you get a chance to drive something like a miata on street tires on track with no nannies, you should do so. Easy to handle and things happen very slowly!
08-16-2022, 09:44 PM
#7
Rennlist Member
Thread Starter
False alarm.....I took the wheels off this evening and the pad wear is very similar front to back (about 11 mm in the front and about 10 mm in the rear). I have no idea why they appeared so different through the wheels. Thanks for all the input.
The following users liked this post:
JRitt@essex (08-17-2022)
Trending Topics
08-17-2022, 08:29 AM
#8
Basic Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
Sometimes it's just an optical illusion due to the overall pad size, etc. It's tough to get a good read by just looking through the wheels.
Here's an article on racing and track pads that you may find useful as well. It examines pad taper, crumbling, checking pad thickness, etc.
Track and racing brake pad owner's guide
Here's an article on racing and track pads that you may find useful as well. It examines pad taper, crumbling, checking pad thickness, etc.
Track and racing brake pad owner's guide