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[gsizoli]

Hi!

Does anybody use drilled or grooved brake discs on her/his car? I'm planning to renew my brake system and these discs are looking good. It would be great if you could give me valuable advice, what kind of discs are good quality and which are not on Ebay. So If you could offer me a reliable one I would be haopy (certainly If it's exsits)
Br
Zoli

[RobG]

Braking efficiency with the standard set up is more than adequate as long as genuine parts are used

[Marks DTM Calib]

I think Mick Dundee has them....I am sure others do as well.

Just be aware that you will gain with respect to looks only for road use

[tommycon]

[img]

Hi!

Does anybody use drilled or grooved brake discs on her/his car? I'm planning to renew my brake system and these discs are looking good. It would be great if you could give me valuable advice, what kind of discs are good quality and which are not on Ebay. So If you could offer me a reliable one I would be haopy (certainly If it's exsits)
Br
Zoli

hiya, i`ve bought a few sets of mtec100 from ebay, had them for my Calibra turbo ( chipped 245bhp), Vectra and now on my 2.2 dti Omega, never had any trouble with them at all. they stop the car just as good as normal ones, i bought them really as cosmetic rather than performance. they look really good with painted calipers, nothing too blurish. don`t know how to put pictures on here but if you want i could send you some.
 paul

[fastcav]

 I'm running black diamond drilled and grooved discs on a couple of my cars with no complaints, theyre on 1.8 manta, 360bhp cav turbo and 2.5td omega estate, only advice i would give would be to make sure you upgrade brake pads as well, i run ebc green stuff pads as i found that the grooved discs would quite happily munch a set of standard oem pads within about 1200 miles, but i can be a bit enthusiastic with the loud pedal and often ignore braking till the last minute  8-)

[2woody]

drilling and grooving is a fashion item only.

such features were developed to clear gases and pad dust where there is rapid brake pad wear, not really the case for a road car. And by rapid, I mean a set of pads in an hour or so.

[feeutfo]

Performance of my stock trade club discs is fine, however I am disappointed at the lumps of rust falling off the outer edge already. Maybe 9 months old, they have done a winter.

[omegadan67]

drilling and grooving is a fashion item only.

such features were developed to clear gases and pad dust where there is rapid brake pad wear, not really the case for a road car. And by rapid, I mean a set of pads in an hour or so.

 how do you come to that conclusion?
Drilled and grooved disc's are used in most motor sport true and if you are running a tuned car they help with heat dispersion which was the main reason for them in the first place to reduce fade and warping the disc's

[Entwood]

drilling and grooving is a fashion item only.

such features were developed to clear gases and pad dust where there is rapid brake pad wear, not really the case for a road car. And by rapid, I mean a set of pads in an hour or so.

 how do you come to that conclusion?
Drilled and grooved disc's are used in most motor sport true and if you are running a tuned car they help with heat dispersion which was the main reason for them in the first place to reduce fade and warping the disc's

Answered in the second sentence .. which you seem not to have read ... 


such features were developed to clear gases and pad dust where there is rapid brake pad wear, not really the case for a road car. And by rapid, I mean a set of pads in an hour or so.

[omegadan67]

drilling and grooving is a fashion item only.

such features were developed to clear gases and pad dust where there is rapid brake pad wear, not really the case for a road car. And by rapid, I mean a set of pads in an hour or so.

 how do you come to that conclusion?
Drilled and grooved disc's are used in most motor sport true and if you are running a tuned car they help with heat dispersion which was the main reason for them in the first place to reduce fade and warping the disc's

Answered in the second sentence .. which you seem not to have read ... 


such features were developed to clear gases and pad dust where there is rapid brake pad wear, not really the case for a road car. And by rapid, I mean a set of pads in an hour or so.

Theres always one which motor sport uses pads up with in an hour or so?

F1 last a race GT LMP last 6 hours or more.

[Entwood]

Methinks comparing F1/GT ceramic brakes with steel road brakes is a pretty pointless exercise ..

[omegadan67]

Methinks comparing F1/GT ceramic brakes with steel road brakes is a pretty pointless exercise ..

F1 yes ceramic / carbon, GT LMP dont use ceramic as per the regs they metalic disc's and mineral pads hence why i stated GT LMP. so what about touring cars?not ceramic  last 2or 3 races in aday???


Or am i missing the point

[Kevin Wood]

Theres always one which motor sport uses pads up with in an hour or so?

On a heavy car like an Omega I'm sure an hour of track time would see the pads pretty heavily worn.

I'm not sure how they help heat dissipation. Most of the heat is conducted into the disk from the disk/pad interface so getting air flowing around the disk is the only thing that will help cool it, i.e. venting the disk and ducting air to it.

The issue with road cars, IMHO, is that a disk has to last a couple of years, suffer lots of thermal cycling in that time and typically gets very little maintenance once fitted. Drill holes or machine grooves in it and you weaken it and provide stress raisers that can cause the disk to crack.

Kevin

[omegadan67]

Theres always one which motor sport uses pads up with in an hour or so?

On a heavy car like an Omega I'm sure an hour of track time would see the pads pretty heavily worn.

I'm not sure how they help heat dissipation. Most of the heat is conducted into the disk from the disk/pad interface so getting air flowing around the disk is the only thing that will help cool it, i.e. venting the disk and ducting air to it.

The issue with road cars, IMHO, is that a disk has to last a couple of years, suffer lots of thermal cycling in that time and typically gets very little maintenance once fitted. Drill holes or machine grooves in it and you weaken it and provide stress raisers that can cause the disk to crack.

Kevin

drilled and grooved disc's are made to withstand greater thermal cycling and  iirc are not made to last 3 years maytbe 9 to 12 months 18 at the most.

[2woody]

they first came out for stuff like the Jaguar XJ-S touring cars, which had problems with very short pad life - and also with being able to remove the used pad material fast enough to keep the disc clean.

actually, drilled discs dissipate less heat than plain ones, as the centrifugal effect is lessened.

As with so many other things, being able to market a disc which looks like one fitted to a racing car is a good marketing tool.