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Richard Freilich said: Not that I am an expert in these matters, but
would have drilled the holes angled in the direction of airflow and
rotation. This provides more surface area to be cooled and increases
airflow. This what my Suburban slotted and drilled front discs
had.
I think you are describing a "vented" rotor. Most automotive rotors
are cast "vented". To do that in a "rework" scenario would be a more
significant effort. I agree, it would additionally help cooling, but
more difficult to do. Craig Berland
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