Drilled And Grooved Discs

[midsfocuszetec-s]

Hello all, i have recently fitted Some drilled grooved discs and green stuff pads to my focus 1.6 zetec s 2009. I'm having all sorts of issues with noise and braking since the change, after much head scratching someone has to told me might be due to the discs wrong way round???? I'll upload a photo to show how they are on the car currently , any advice would be great, the photo is of the passenger side hub.

[Greg-powell]

There the same ones I had put I had no problems at all

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[midsfocuszetec-s]

Been to 2 separate garages and called the company who supplied them all have said they are wrong way round . Did you fit them yourself???

[Greg-powell]

Yeh fitted my self only takes a few mins, just swop them over then mate and see if the noise stops

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[midsfocuszetec-s]

Will do, seems to only option left or go back to standards, thanks for the info mate!

[artscot79]

They are useless on anything other than a race car the grooves wear pads quicker take longer to warm up and not necessary for road use unless you have some serious power under the bonnet

[Willy]

I looked into getting grooved / drilled disks but was put off by the jet engine noise they make. Air gets trapped in the grooves when braking and the noise is a side affect of that.

[Nighthawk]

They're designed to drag air in to keep them cool, if fitted the wrong side like rotational tyres then they can't do their job.

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[stef123]

I looked into getting grooved / drilled disks but was put off by the jet engine noise they make. Air gets trapped in the grooves when braking and the noise is a side affect of that.

I can't say I ever noticed any difference when I used to use them on the focus. The only issue was the pads were quite harsh.