M3 friends:
And of course the girodisc dust boots did not survive. Found a melted one on each front caliper:
Also, got my 3D printer and continued with the brake duct development. First prototype on the left and latest on the right:
Test fitted the third one from the left:
Fits great! Newest version has the fan clocked differently for better clearance and has a slightly different front mounting tab design, but is otherwise the same.
Speaking of the fan, I decided that it would be much easier to test the duct performance with one, so I went this route instead of the originally planned passive vacuum generation. I'm still not sure if the fan will live on the duct or if it will live in the belly pan and be connected to the duct with some hose. The fan itself isn't too heavy, but it spins up to 16k rpm, so it puts a decent amount of torque on the duct when the wheel is turned. Having it in the belly pan means I can go to a more powerful fan too if needed. I'll have to do some (destructive) testing and decide if I want to move it or not. More to come
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