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So far the stock brakes have been pretty impressive. I also noticed my rears have gt3 cooling ducts (i have RAS) and i cant get the rear rotors over 250F on the street. The car consistently stops harder than my new michelin ps4s tires can handle since the car is so light. Going to track end of the month will report back if the bakes dont hold up with 2-3 hours of track time. Anyone have any issues with stock brakes on track? I already upgraded fluid to Ate 200.
Sorry to revive old thread. Just wondering what your thoughts are now? On a hot track day I get a lot of fade and have been looking into ventilation/ducting solutions for the fronts.
Sorry to revive old thread. Just wondering what your thoughts are now? On a hot track day I get a lot of fade and have been looking into ventilation/ducting solutions for the fronts.
Everything stock at the moment. I know I could reduce the fade a bit by getting performance pads (and fluid) but a bit reluctant to trade off against everyday usability (ie squeal/heat up time). Happy to hear suggestions though!
Everything stock at the moment. I know I could reduce the fade a bit by getting performance pads (and fluid) but a bit reluctant to trade off against everyday usability (ie squeal/heat up time). Happy to hear suggestions though!
The stock pads are not durable enough for regular track use. They are the problem. No amount of improved cooling or brake fluid will help.
Most serious track folks upgrade to Pagid yellow or PFC 11 or Endless brand pads etc. From my experience there really is no pads that works effectively on track and on the street. Folks just swap them for each application.
The stock pads are not durable enough for regular track use. They are the problem. No amount of improved cooling or brake fluid will help.
Most serious track folks upgrade to Pagid yellow or PFC 11 or Endless brand pads etc. From my experience there really is no pads that works effectively on track and on the street. Folks just swap them for each application.
Thanks for the info. It seems to confirm my thoughts about the trade offs of going to performance pads.
However just to clarify, my issue is not about durability - my current stock pads are still holding up fine so far and I'll happily change them out when they do wear. My only issue is about the onset of fade after 15-20 minutes on a hot track day. My understanding (which im always happy to have challenged!) is that this primarily due to the smaller rotors which cant dissipate the heat fast enough, exacerbated by not having a duct/spoiler that the S/GTS apparently has. The reason im focusing more on the airflow is that in endurance racing its always our go-to solution to brake fade. We'll cut holes in the front bumper and run ducts onto the rotors on hot days or hard braking tracks and the problem goes away. A friend of mine found these which he thinks are the upgraded spoiler/duct but im not sure they'll fit: https://www.ecstuning.com/b-genuine-...r/99134148380/
Thanks for the info. It seems to confirm my thoughts about the trade offs of going to performance pads.
However just to clarify, my issue is not about durability - my current stock pads are still holding up fine so far and I'll happily change them out when they do wear. My only issue is about the onset of fade after 15-20 minutes on a hot track day. My understanding (which im always happy to have challenged!) is that this primarily due to the smaller rotors which cant dissipate the heat fast enough, exacerbated by not having a duct/spoiler that the S/GTS apparently has. The reason im focusing more on the airflow is that in endurance racing its always our go-to solution to brake fade. We'll cut holes in the front bumper and run ducts onto the rotors on hot days or hard braking tracks and the problem goes away. A friend of mine found these which he thinks are the upgraded spoiler/duct but im not sure they'll fit: https://www.ecstuning.com/b-genuine-...r/99134148380/
The durability I was referring to was anti-fade capacities. The stock pads will not hold up with heavy track use, they heat soak and fade. No amount of improved cooling or higher temp brake fluid with help. The stock pads are simply not robust enough for track. You need to try some track dedicated pads to understand. It is like night and day.
For 991 owners evaluating brake options, we have an incredible array of AP Racing brake options for the road, track, and everything in between. Ferodo Racing Pads, Spiegler stainless steel brake lines, 2-piece AP Racing J Hook Discs that mate to the OEM calipers, Complete AP Racing Radi-CAL Brake Kits (which is what the 911 RSR used to win Le Mans)...all at lower prices than what have been discussed in this thread. More details here:
Let us know how you're using your car, and we'll help steer you towards the upgrade that best fits your needs and budget. Thanks!
__________________
'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
Did you change the brake master cylinder? It would seem that with the larger rotors you would get more mechanical advantage. All things being equal, that would mean lighter pedal effort for a given level of deceleration. In my opinion, brake effort is already too light, and I don't think I'd want that.
Thank you Taxi. I stand corrected.....trying to get this together too late and too quickly! Update to follow and I will get part numbers up if there is interest.
Could you please post the part numbers for conversion to 380 mm Turbo brakes, especially OEM spacers for brake calipers.
Many thanks in advance.
GiroDisc have 350mm rotors for the base and T and they provide a really good sweep area. Just need spacers for the calipers and Pagid sells pads for this set up.
GiroDisc are about $2400 for all four wheels. Plenty of stopping power.
since the base and T are 4 caliper set up and the S is a 6 piston you can not put Rotors on base or T as the sweep area will not be 100% and why GiroDisc developed their 350 mm for the base and T. May need to call them to get correct part.
I have these brakes on my 991.2 C2 and they're UNBELIEVABLE. One of the best upgrades I've made to my car!
Originally Posted by JRitt@essex
Gents,
For 991 owners evaluating brake options, we have an incredible array of AP Racing brake options for the road, track, and everything in between. Ferodo Racing Pads, Spiegler stainless steel brake lines, 2-piece AP Racing J Hook Discs that mate to the OEM calipers, Complete AP Racing Radi-CAL Brake Kits (which is what the 911 RSR used to win Le Mans)...all at lower prices than what have been discussed in this thread. More details here:
GiroDisc have 350mm rotors for the base and T and they provide a really good sweep area. Just need spacers for the calipers and Pagid sells pads for this set up.
GiroDisc are about $2400 for all four wheels. Plenty of stopping power.
since the base and T are 4 caliper set up and the S is a 6 piston you can not put Rotors on base or T as the sweep area will not be 100% and why GiroDisc developed their 350 mm for the base and T. May need to call them to get correct part.
that’s exactly what I did with the dot 4 ,pagid yellows (yellow 29’s I think) also put sport cup 2’s on Forgeline wheels
Works great and not a fortune
In addition to our complete brake kits, we also offer AP Racing J Hook 2-piece discs in 350mm front and 350mm rear sizes to mate to the OEM calipers on the Carrera T, S, etc. We include the appropriate billet aluminum spacer to locate your OEM calipers properly. While our discs are a tiny bit more expensive than competing options, our discs have also proven to be the most durable, lightest weight, and the aluminum center hats tend to retain their black color better (vs. turning a coppery-pink color). I also think the J Hook slot pattern looks really cool. We have also been supporting the Rennlist community for a long time.
01-26-2020 | 11:33 AM
We have also been supporting the Rennlist community for a long time.
