SamFromTX

I knew from before that the 997 GT3 brake pads wore in a tapered fashion but for some reason I felt they will have it fixed for the 991. Not true. Short of swapping pads, does anyone (esp. 997 owners) have a fix recommendation?

MaxLTV

WTF. This is really bad. I hope it is not normal wear for this car.

paver

you may already know this but flip them after every 2 or 3 trackdays, outer to inner and vice versa

911rox

+1

or try PFC08s... The track guys using them found very minimal taper on the 997 cars whereas Pagids/OEM would show taper of 4mm+....

mqandil

I have experienced the same on my 911 991 4S even with light track use, so I switched to track pads and problem disappeared completely. Biggest problem was how hard to replace these pads. Really pain the rear and took forever to swap so I decided to leave the track pads on all the time and they work well on and off track and no more uneven wear. I don't know if the Gt3 has the same issue or if it is hard to change like the 991 4S but I suspect it is. I really did not have much time with the GT3 and mostly it has been baby miles to break her in. OK may be not totally baby miles, and perhaps some toddler miles here and there, but was really looking forward to graduate soon to adulthood hardcore miles.

orthojoe

WTF??!! The pads still taper?!? I thought that was what the 'reinforcement bar' that prevents easy pad changes was for. The solution is the flip the pads after every track day, but now that turns into an even bigger pain in the *** since the whole caliper has to be removed to do it. Hopefully aftermarket pads will prevent this problem.

24Chromium

I'm just curious, are you leaving all the nannies on?

On my 997.2 RS I switched to Endless pads from Pagid and never looked back. The Endless pads are more $$$, but they last longer (effective life, not actual pad thickness) and don't taper nearly as much. Yes, flip them at half-life.

orthojoe

Those look like the front pads to me. Nannies just affect the rear, no?

stronbl

I found these to help quite a bit with the new bridge style calipers for changing pads. Still not as simple as in the past, but every little bit helps.


http://vw.snapon.com/SpecialToolsDet...oup_Name=Brake Tools&PrevGroup_Id=9&groupId=1353&Group_name=Brake Tools&Cat_ID=1353&Cat_Name=Brake Tools

24Chromium

It's not obvious to me how these work. Can you explain their purpose, where they are installed and how they are used?

stronbl

Installing front disc brake pads
Installing disc brake pads

Carefully press the brake pads back using water pump pliers. Remove a little brake fluid from the
reservoir by suction if necessary in order to prevent an overflow!
5. Use removal/assembly aid for brake callipers assembly pin
T10439.
6. Remove top fastening screw on the brake calliper and insert
assembly pin -top direction arrow- .
Fastening screws on brake calliper
7. Remove bottom fastening screw on the brake calliper and insert
assembly pin -bottom direction arrow- .
Assembly pin for brake calliper fitted
8. Pull the brake calliper as far as required out of installation position

until the brake calliper engages in the cut-outs on the assembly
pins. Carefully guide the brake line and brake hose along as well!!
9. Fit the brake piston between the brake pads on the brake calliper
using piston resetting fixture (replaces P83) Nr.144, see
Workshop Equipment Manual, Chapter 2.4 and press the pads
back evenly -arrows- . Remove a little brake fluid from the
reservoir by suction if necessary in order to prevent an overflow!
Pressing back brake pads
10. If you intend to re-use the brake pads, mark the relevant
installation position. Carefully slide a commercially available
screwdriver between the brake pad/brake calliper and lever the
brake pad out by turning the screwdriver slightly. When doing this,
make sure not to damage the dust boots on the brake pistons
-arrows- .


Some pics to help illustrate teh above procedure. Hope this helps.

Page 4 of 8
https://techinfo2.porsche.com/PAGInf...vigation&Print... 2/8/2013

orthojoe

^ I like it! An alternative to switching to studs.

MaxLTV

Fronts too - braking outside front to prevent oversteer. I had bad taper issues once in aftermarket Alcons, so I researched possible causes quite a bit. Stability systems do increase taper because they pulsate brakes and that type of pressure causes leading edge to do much more work than in case of smoother and longer application by driver.

Another possible cause, beside poor caliper design of course, is air in caliper. That might allow for uneven pressure between pistons, and taper.

Anyway, I am really upset by seeing this. I do not have time to rotate pads after every other track day, and enjoyed set it and forget it approach of my current brake setup. Downgrade would be a bummer...

BTW, Suncoast has OEMs and Pagids for 991 GT3, both priced very reasonably, but I have not seen any other brake pads for it yet. I'm big fan of Endless - last longer than PFCs and almost no noise, in my experience. Pagids are good but go to **** after 50-60% done.

TRAKCAR

I expect tapering gone on the 991GT3, with PFC brakes.
For 997 as said above, use PFC and flip after 2-3 days.

SamFromTX

Thanks for all the input. I'll try to address all:
I did not experience this issue in the C4S (about 5,000 track miles). In that car, I drove the first two-three pad sets with nannies on then afterwards, with all off. In the GT3, I am mostly driving with the nannies on as they do not interfere until very late. I'm not trying to prove anything and I am aware there are tons better drivers than me out there but I don't want to take a small risk of damage to the car. That said. I don't think stability has anything to do with the taper pattern because brake application, whether intentional or due to stability activation, is the same. Further, this is a known issue for 997 as well, even for those who drive with the nannies off.
PFC does not make pads for this car yet. I now have Pagid 29s but from the responses above, it sounds the problem will persist.
The problem is in the front only, the rears are wearing evenly, further underscoring it is not a nannies issue.
I do realize swapping the pads is the solution and was looking for an easier one. Will have to research the above mentioned contraption.