Date: 4 Jun 2006 16:11:16 GMT From: Dave Hinz <DaveHinznospamcop.net> Subject: Re: Brake Pad Recommendation For 1996 9000 CS
On Sat, 03 Jun 2006 14:40:25 -0400, Fred W <Malt_Houndnospamm-me-not*yahoo.com> wrote: > Dave Hinz wrote: >> Because the cross-drilled holes create an air column. The air absorbs >> and then disperses the heat, carrying it away from the rotor. > I'm not seeing this... The rotors are already vented from the edges for > additional cooling. Where is this purported "column" of air? Do you > have any sort of web reference I can go to? Well, it gives the air being heated on the surface of the rotor, somewhere to escape to. Think hydroplaning but with a different fluid. This is the equivalent of grooved pavement, and siping on tires. Give the fluid somewhere else to go and you get better contact. In the case of braking, that fluid is hot air, and helps carry the heat away from the rotor/pads. If "wizard words" isn't google-able I probably don't have a link.
