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The mkiv Supra Owners Club

Direction of brake grooves?


supraman.chris

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Just spotted some pics of other Supras and noticed their drilled and grooved brake discs point in an anticlockwise direction whilst mine point in a more rotary clockwise direction on car and because i've binned the paperwork i just wanted to know the reasons behind this and whether or not i need to change my set up?

 

Brake spec detailed in my signature:

 

Cheers.

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If you take a look at the AP-racing web site, you can buy different discs with them going in different directions. When I last looked the latest thing was little J shaped things all over the discs. But yeah I thought the same thing after seeing someone with the same brake kit as mine but with the grooves going in the opposite direction.

It's the turning vanes inside the disc that define which way around they go. It should act like an air pump when the wheel is going forward (ie pumping air outwards) Take a look at the AP site, I'm sure there are diagrams of how it should go which will explain it better than I can.

 

Best of luck!

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If you take a look at the AP-racing web site, you can buy different discs with them going in different directions. When I last looked the latest thing was little J shaped things all over the discs. But yeah I thought the same thing after seeing someone with the same brake kit as mine but with the grooves going in the opposite direction.

It's the turning vanes inside the disc that define which way around they go. It should act like an air pump when the wheel is going forward (ie pumping air outwards) Take a look at the AP site, I'm sure there are diagrams of how it should go which will explain it better than I can.

 

Best of luck!

 

I'll take a butchers at the AP site then, cheers lad. Did you end up changing your setup? You should'v seen the condition of the old discs by the way!

 

Front outer surface 100%

Front inner surface 50%

Rear outer surface 25%

Rear inner surface 25%

 

What a difference they made changing them anyway, i donated the old ones to the local discus throwing team!:D

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How do you mean did I change my set-up? Compared to the old J-spec discs I had? Yes I've now got a set of AP 6 pot calipers and discs. If you mean did I swap my discs around, then no they were the right way, it was just my grooves curving in the opposite direction.

Sounds like it was definitely time for you to get some new anchors!

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mmmmmm.....BIG brake conversions :drool:

 

Had to make do with the best i could afford for now, dare say AP's or Brembos will be on the horizon though.

 

With braking surfaces like that i would have maybe been better off with an anchor!

 

Heeps of before and after pics of all the mods i've made will be on route once i get her back from the bodyshop.:D

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The vanes should go like below, and usually the grooves will also go that way. IE, they are handed left and right side.

QUOTE]

 

That was my point, they don't necessarily go with the vanes...

 

Check out face types G and CR

 

http://www.apracing.com/car/brakedisc/face.htm

 

See thats where i'm gettin a tad confunkled, my discs look alot like the CR4's and are open ended grooves to help with disspercal (spelling?:blink: )of brake dust.

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