ard

I am planning to install ducting to bring fresh air to the inboard side of the front brakes. While I haven't fully mapped out the layout, would the ducts be more effective if their outlets were directed at

1. the "eye" of the rotor
2. at an unobstructed area of the rotor
3. at the inboard side of the brake caliper which (obviously) sits at approximately 1/2 the rotor diameter along the rotor perimeter?

My initial assumption is that the directing the ducts at the caliper is more effective as this is where the heat resulting from the friction of the pads against the caliper originates. OTOH I can also see a benefit to the rotor passing through a stream of air as it rotates. I think directing at the eye of the rotor may be a compromise if securing the duct to point at the other 2 locations is not feasible.

I am open to being educated.

TIA

/alex

winders

Cool the rotor....

stownsen914

What he said. It's the bigger heat sink part of the assembly. Into the eye with something that guides the air toward the internal cooling vanes.

Mahler9th

Fred Puhn: The Brake Handbook.

Mahler9th

962. Very large hose. Cooling is for rotors AND wheel bearings. Ground effects = wheel bearing heat.

R717

Jeff Ritter at Essex co-authored a very informative article which would be worth your time to read:
https://www.essexparts.com/news-blog...n-my-track-car

lcrain

Great article! I experienced *anecdotal* improvements after removing my ducts and more importantly the backing plates vs. with them on my e36 m3 racecar. I was experiencing fade later in a race with the ducts and backing plates which urged their removal and I haven't looked back.

Ubermensch

That’s a helpful article. Thanks for sharing it.