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      12-12-2012, 03:05 AM   #58
exdos
Second Lieutenant
England
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Drives: Z3 M Coupe(S54) and Z4 M Coupe
Join Date: Apr 2008
Location: UK

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Quote:
Originally Posted by Finnegan View Post
Nothing wrong, it made sense, and seemed workable. I noticed it after the first few posts and haven't been back to take a second look .

What I don't think was posted was some type of measure of airflow to the rotors and effectiveness. Maybe that's something I just need to look a more updated version of the thread to find?

Work in this area is appreciated!
Thanks!

I will doff my cap to anyone who can come up with a better way of routing ducting from a zone of high pressure/cold air at the front of the Z4M to the brakes. Obviously, I could have made fancier fittings but what I have made works well and was made out of bits and pieces that I had to hand.

With regards to the flow rate, I wrote in the thread: " If you use the calculator here: http://www.1728.org/flowrate.htm you can estimate the flow rate of air at different speeds of the vehicle. If we assume the diameter of the brake ducting is 1.75" (being conservative) then at 50mph over 34 litres/sec of air passes into the centres of the brakes and at 80mph it is 55.47 litres/per second, all that air MUST have more cooling effect on the brakes than with no ducting. "

When all is said and done, it's the constant flow of air through the ducting that is the effective part of this mod, and this is not diminished because there aren't any expensive fancy Carbon Fibre parts at both ends of that ducting


Here are a couple of links to my brake "How Tos":
http://www.z4-forum.com/forum/viewto...p?f=34&t=38775
http://www.z4-forum.com/forum/viewto...p?f=34&t=45293

Last edited by exdos; 12-12-2012 at 03:11 AM..
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