MKSGR:
Whoopsy:
MKSGR:
Whoopsy:
. By the end of the day, the braking point has moved almost 50m back on our 800m long straight, where it can top 250+km/hr earlier in the day and need to drop down to around 120km/hr to make the corner. The braking system cannot handle the heat soak.
If that was not due to a technical problem the moving braking points points seem to indicate problems with the tires rather than with the brake. AZ also states that the breaks are very stable under extreme conditions. Also, based on my experience, ceramic brakes don't get any weaker when they get hot. Was the car on track on Corsa tires?
Yes, it was on fresh Corsa.
Cornering speed and corner exits doesn't semi to changed though, if it was degrading tires then both would suffer.
But the car sounded awesome at full throttle from the outside!
Strange - the ceramic brakes on the market usually show no fading at all. Even under extreme conditions Also, the AZ test explicitly writes how great the brakes are. No fading etc. mentioned.
I don't think AZ stressed the car like we did, the 720S was driven hard from 9am to 4pm. 20 mins sessions with about a 20mins wait in between.
The only cars I have driven on track with ceramic brakes that doesn't fade lap after lap was the 918 and the GT3RS/911R. My F12, Huracan and Aston all had some form of fade. Actually the Cayenne Turbo S was really good too, but the tires were the limiting factor, not enough grip.
The 918 ones were amazing, almost matching the PFC Cup Car brakes on my ClubSport, I can just hammered them. order after corner without kicking into ABS, pretty sure that has to do with the regen braking as the brake system itself isn't stressed that much. The GT3RS/911R was great too, but I can't pressed on the brake pedals as hard as ABS kicks in.
Physics simply takes over on the Aston, it's a heavy car. The F12 over heats its brake system even with the brake cooling flap opened, and eats up all the pads in the process, the Hiuracan was handicapped by street usage brake fluid, it boiled them. I suspect the 720S likely have street fluid instead of track fluid too. Ambient heat was around 26-28 degrees during the McLaren days.
There is a pattern here, only Porsche designed their brake cooling to handling sessions after sessions, the other manufacturers just design them to be good enough for one session, which is how most cars are being tested. Endurance vs sprinting. Just different philosophy.
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