Results 1 to 4 of 4
  1. #1
    Join Date
    Apr 2006
    Location
    Bournemouth UK
    Posts
    4,782
    Mentioned
    2 Post(s)
    Tagged
    1 Thread(s)
    Rides
    1

    Default Brakes - Drilled or grooved?

    Following on from Jan's thread about his new big brake kit, what are peoples thoughts on the merits of grooved brakes against drilled.

    I know the grooves\holes are there to allow the release of gas formed at the interface of the disk/pad, but which works best? I've also heard that drilled disks are more likely to crack at some point, has anyone got experience of this.

    Steve
    1994 Alfa Romeo 155 Q4: Dozeing in the garage.
    2009 Audi A4 tdi: Everyday drive.
    1994 Alfa Romeo 155 , 1995cc Std Standard Black

  2. #2
    Join Date
    Jan 2007
    Location
    Derbyshire, UK
    Posts
    3,082
    Mentioned
    2 Post(s)
    Tagged
    1 Thread(s)
    Rides
    0

    Default

    No personal experience but I've got major reservations about drilled discs after seeing too many pictures of them with heavy cracking....not for me thanks!

    wrinx
    My Q4 in the Garage

    www.alfaromeo155.co.uk ............................ □□□-V-□□□ .................................. www.ilmostro.co.uk

  3. #3
    Join Date
    Dec 2007
    Location
    Netherlands
    Posts
    309
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    Drilled will crack when used heavily.
    No personal experience, but the people doing my alfa and the people doing the S2000 both advice against drilled rotors.

    So i am glad to have some slotted brembo discs. But i do understand they are not making these anymore in favor of the drilled version.

    For my use of the Q4 probably both would be alright. But the S2000 has to go on track for almost 2 hours straight, and the slotted discs on this car are very impressive. (Aftermarket.)

    I did see some examples of cracked drilled discs on other peoples cars.
    155 Q4 wb 1995
    S2000 2005
    V70R 2005

    www.alfa155club.nl

  4. #4
    Join Date
    Jun 2006
    Location
    Athens - Greece
    Posts
    1,008
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Rides
    0

    Default

    I always use brake disks with holes-grooves and it is not only that they allow the release of gas formed at the interface of the disk/pad!
    They allow water-rain and dirt to go away faster.
    I do not see marks {from dirt} that often and disks does not tend to deform {to become like "8"} so easily.
    That's my experiance.

    Nick

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •