The limiting factor was tire grip Oregon Raceway Park (ORP), clockwise one day and counter clockwise the next, is hard on the brakes, tires and suspension with the hardest braking zones being downhill and the brakes did not complain both days. GiroDisc is definitely doing its thing and the HPA rear BBK is doing its part.
I am happy to report that I experienced no fade and the brakes were consistent and solid the entire time. I believe the GiroDisc rotors are doing a fine job at evacuating heat and in combination with the HPA rear BBK, the car stopped strong and flat. I am a happy camper.
End of the day, and these are the best performing brakes I've ever had equipped on the car. They felt exactly the same on the last hot lap as they did on the first. I also ran titanium backing plates, and had zero fade issues all day. If they hold up over time, I highly recommend these over the OEM rotors if you track your car.
For any of you that have upgraded to TT RS front brakes and track your car, you might have learned that the OEM rotors just aren't up to track duty if you push your car. I was warping the stock rotors from heat during track days. So I went in search of a two-piece rotor and initially found two options, both of which came in at well over $1,200. My timing was good however, as I stumbled upon a thread in the TT RS forum about an owner that had just fitted his car with a prototype from Giro Disc. I'd never heard of Giro Disc before, but some research gave me comfort they were producing a quality product. I reached out to Mike at Giro Disc (who couldn't be more helpful) and they had a few more sets available, so I was fortunate enough to get my hands on one of them. And just in time, as my next track day is in two days. I just installed them, and as you would expect, they are a direct fit. I'll post performance impressions after my track day, but in advance of that, here are my initial thoughts: - OEM rotors weighed in at 26.6 lbs and the Giro Disc are 19.8 - There is significantly more spacing, which will hopefully move more air and allow for better cooling.
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