Hi everyone. Long time lurker, first time poster.
I'm hoping someone can help me out. I was recently at Sebring International Raceway for a High Performance Driving event and near the end of the event (5th of 5x 30 minute sessions with a minimum of 1 hour rest in between) I felt abruptly increased brake pedal effort, decreased braking performance, and noisier braking. My pedal was still firm and I was able to just stand on it harder to stop nearly as quickly, but something was obviously wrong. When I went to swap back to my street pads, I noticed that the track pads looked terrible. I believe they are glazed? This was my second track day on these pads and they were only used on the street to get to and from the event which was less than 100 miles each way. I did my best to bed the pads into the rotors with increasingly aggressive braking without stopping (and the cooling ducts blocked) the night before the event as I had previously and they felt great until they suddenly didn't. The only differences from the previous track event where I had no issues to this one were stickier tires (previously Michelin Pilot Sport 4S 215/45/17) and a master cylinder brace. The rear pads look perfectly fine.
My car specs are as follows:
2016 Subaru BRZ Limited w/ 46k miles
Engine is completely stock aside from a K&N drop-in filter
Stock weight
Stock wheels
Bridgestone Potenza RE-71R 215/45/17 tires all around, brand new
Stock calipers
Goodridge stainless steel braided lines all around
Motul RBF 600 fluid
Verus Engineering front brake cooling ducts "molded" into the front bumper
Front brake rotors: Centric 120.47021
Street pads: Ferodo DS2500 all around
Track pads: Ferodo DS1.11 all around
Stock springs and shocks
Whiteline WEK001 and WEK002 bushing kits
Whiteline BSK020 front and rear sway bar kit
I believe I've read on here that the stock brakes with good pads should be good enough to lock up most DOT tires but I've honestly never experienced anything close to that even with super cheap tires.
Is Sebring at 86° just too much for the stock setup?
Would a different pad hold up better?
Should I shove electric ducted fans into the cooling ducts? (LOL?)
Do I have to go to a big brake kit if I want to keep playing?
I have some data recorded through TrackAddict for the whole event. Please let me know if that or any other information would be helpful.
Thank you
