Drilled & Grooved Brake Discs - Alfa Romeo Forum
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Drilled & Grooved Brake Discs

So, this week I'm getting some new pads and discs for my Spider. I've already settled on Mintex Xtreme pads, but I'm undecided on what discs aer the best.

Is there a difference between 'drilled', 'grooved', and 'drilled and grooved'?

Personally, I think 'drilled and grooved' look a little better, but if one of these options will improve my braking a little more, I would certainly have a rethink.
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Re: Drilled & Grooved Brake Discs

You won't notice any difference on the road so go for the one you like the look of best.
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Re: Drilled & Grooved Brake Discs

Slotted discs will prevent any glazing on the brake pads , the "holey' ones do not do much at all other than look 'holey' and actually can weaken the disc leading to failure if nor done correctly ay the factory .....
In reality go for what looks good to you
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Re: Drilled & Grooved Brake Discs

Lifted from Motorsport World - Performance Car Parts

It's always a good idea to fit performance discs along with performance pads. Performance discs come with a mixture of grooves, holes and dimples which deglaze and de-gas the brake pads when they get hot, thus keeping the friction level high. Holes also enhance cooling by increasing air flow through the discs as well as increasing the overall disc surface area for heat transfer. Black Diamond offer a full range of choice with drilled-only, grooved-only and drilled and grooved discs. EBC and some others have opted for blind drilled holes (or dimples) along with grooves. Other manufacturers such as Tarox and Red Dot specialise in grooved discs with their most expensive discs having 40 grooves. As well as deglazing the pads, the increase in surface area with so many grooves will also help cooling.

With the advent of ever more powerful cars quite a debate has emerged about drilled discs. Those against drilled discs will tell you that the drilled holes are the source of cracking under extreme heat and that the holes are totally unnecessary. Whilst it is true that heat stresses are maximised at sharp edges if discs are well enough made from high quality castings it is not an issue - look at high end performance Porsches and Mercedes - a number of models have discs with multiple drilled holes.
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Re: Drilled & Grooved Brake Discs

I have Tarox drilled & Grooved.Been on about a year or so with no problems.And yes they do make a difference.Quite a bit infact.Maybe my old pads were badly glazed or something,but these new pads and discs really bite and scrub speed off so much quicker

Last edited by Alfie GTV; 15-03-09 at 15:48.
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brake , discs , drilled , grooved

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