Quote:
Originally Posted by CSG Mike
FTFY.
Ducting brings the equilibrium point down, but also comes at the cost of larger temperature swings. This application of ducting is a band-aid for a braking system that is just too small.
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To me this suggests that professional race cars don't have brakes that are big enough since so many run ducting... But that's not why I'm here.
I need to the see the math or the data to flesh out how lowering the equilibrium = increases temperature spikes. Do you have a resource for this Mike? My experience from the hundreds of cars that run ducting here in the Pacific Northwest is that brake ducting, even on cars with massive rotors, is always good and you can never get enough of it. Rotors/pads/fluid all last substantially longer as a result. I will add that in the PacNW, we don't have any tracks with excessively long straights that we would ever run on in very cold weather. So what you speak of simply may not be a concern in this neck of the woods.
But then again, maybe
all cars are under-braked if that's the case? That's sort of tongue-in-cheek.. If the rotor doesn't need cooling (or the temp variations are too extreme) then the ducting can still be of benefit in keeping bearing/axle/caliper temps down.
I would also like to know more about how ducting cause your rotor failure and what part of the rotor the ducting was pointed at. I hope it was pointed at the center. I see people who point their ducting right at the face of the rotor blade and IMHO, it's a poor choice to unevenly cool a rotor, just as it to unevenly heat one. Or were you on a track in the dead of winter with a really long straight followed by a 30mph hairpin?