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Author Topic: Grooved disc rotation???  (Read 1365 times)

Offline Ducky76

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Grooved disc rotation???
« on: January 21, 2012, 02:37:05 pm »
Yo just had my rear discs fitted drilled and grooved ones so I'm running d&g front and back but the front grooves run clockwise  (vented)and the rear anticlockwise (unvented) so what's the deal I've heard the groves push air away and drag air in some say doesn't matter some say unvented need groves pulling in air or is it just brand specific ? :confused:

Cheers andy
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Offline PDT

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Re: Grooved disc rotation???
« Reply #1 on: January 21, 2012, 02:43:58 pm »
Lots of usefull info here: http://www.stoptech.com/technical-support/technical-white-papers

If the disc is vented then its the direction of the vanes in the disc that determines fitment, not the grooves. If not vented then the grooves should sweep the pad and not cut into it.
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Offline PDT

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Re: Grooved disc rotation???
« Reply #2 on: January 21, 2012, 02:49:06 pm »
Solid discs should look like the image of the porsche caliper a few posts down this thread: http://www.clubgti.com/forum/showthread.php?t=170700
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Offline Ducky76

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Re: Grooved disc rotation???
« Reply #3 on: January 21, 2012, 03:07:32 pm »
Ok cool mine correct then just looks different with groves running opposite gunna need 2 explain 2 peeps me thinks
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