TwinTurbo.NET: Nissan 300ZX forum - From a Brembo FAQ
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Subject From a Brembo FAQ
     
Posted by Z U N L on June 23, 2005 at 7:21 PM
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In Reply To Direction of X-Drilled Rotors... posted by 300ZMang on June 23, 2005 at 05:02 PM
     
Message [ http://www.buybrakes.com/brembo/faq.html#q28 ]

It is a popular misconception that the slots or drillings in a disc determine the direction of rotation. In truth, for an internally vented disc, the geometry of the vanes dictates the direction of rotation. There are three vane types in use:

* Straight
* Pillar vane (comprised of many small posts)
* Curved vane

The first two vane types are non-directional, and can be used on either side of the vehicle. The curved vane disc, however, is directional. A curved vane disc must be installed with the vanes running back from the inside to outside diameters in the direction of rotation. Please see figure. Orienting the disc in the manner creates a centrifugal pump. The rotation of the disc causes air to be pumped from the center of the disc, through the vanes, and out through the outside diameter of the disc. This greatly enhances the disc's ability to dissipate heat.

Additionally, all of Brembo's slotted discs are directional as well, regardless of the vane geometry. The discs should be installed such that the end of the slot nearest the outer edge of the disc contacts the pad first. Please see figure.



"The two seater is being joined in a few weeks by a larger two-plus-two model with a rear seat for munchkins." ~Jim Mateja, Chicago Tribune, in regards to the Z32.

Andrew Janeshek // jnshk@aol.com // 1992 NA 2+2 [Stage 2-ish]
Click here for my home page.

     
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