Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

DBA rotors HD series 4000XS

Discussion in 'VF Holden Commodore (2013 - 2017)' started by KING46Calais V, Nov 27, 2019.

  1. KING46Calais V

    KING46Calais V Active Member

    Messages:
    202
    Likes Received:
    104
    Trophy Points:
    43
    Joined:
    Feb 27, 2018
    Location:
    Sydney
    Members Ride:
    2017 VFII Calais V 6.2L Sed
    Anyone have or heard any feedback on DBA 4000XS rotors?

    Might fit these instead of T3's just to be different.

    They look a step up from the street series gold with just the 4 slots. These are a bit more expensive than T3's as well.
     

    Attached Files:

  2. Ron Burgundy

    Ron Burgundy Well-Known Member

    Messages:
    2,242
    Likes Received:
    1,082
    Trophy Points:
    113
    Joined:
    Jun 3, 2004
    Location:
    NSW
    Members Ride:
    VF II SS
    DBA makes quality products. Have not seen reviews but I imagine they are really good. They definitely look best in the whole range in my opinion. I was looking at them but DBA does not make them for my front brake setup...
     
    KING46Calais V likes this.
  3. eman1

    eman1 Active Member

    Messages:
    236
    Likes Received:
    73
    Trophy Points:
    28
    Joined:
    Jul 14, 2011
    Location:
    newcastle
    Members Ride:
    VF2 Redline
    Generally you go to DBA 4000 due to heavy use (motorsport etc), The XS series being cross drilled is not suitable for this use as more prone to cracking as its more a visual thing. You'd be better off with DBA 4000 standard or T3 if your using them for harder use or just standard T2 if just road use.
     
  4. Ron Burgundy

    Ron Burgundy Well-Known Member

    Messages:
    2,242
    Likes Received:
    1,082
    Trophy Points:
    113
    Joined:
    Jun 3, 2004
    Location:
    NSW
    Members Ride:
    VF II SS
    This whole drilled rotors crack talk is bit of bs..Maybe in theory more likely to crack than non drilled rotor...but when was the last time you heard about this happening with DBA rotors in Australia..
    I think it's grossly exaggerated view...
     
    Tonner Matt and lmoengnr like this.
  5. eman1

    eman1 Active Member

    Messages:
    236
    Likes Received:
    73
    Trophy Points:
    28
    Joined:
    Jul 14, 2011
    Location:
    newcastle
    Members Ride:
    VF2 Redline
    On the street you won't crack them.

    However my cracked pair of DBA 4000 says it does happen and if it happened to a T3 it would be worse on a cross drilled rotor.

    Even the DBA site mentions the XS for show and to go T3 for intensive braking. Yes the chances are low but for anyone using them for their intended purpose (motorsport) the risk vs reward of the looks isn't worth it.

    This is what a rotor failure can look like on track.
     
    Ron Burgundy likes this.
  6. Ron Burgundy

    Ron Burgundy Well-Known Member

    Messages:
    2,242
    Likes Received:
    1,082
    Trophy Points:
    113
    Joined:
    Jun 3, 2004
    Location:
    NSW
    Members Ride:
    VF II SS
    Oh wow. That's nasty
     
  7. eman1

    eman1 Active Member

    Messages:
    236
    Likes Received:
    73
    Trophy Points:
    28
    Joined:
    Jul 14, 2011
    Location:
    newcastle
    Members Ride:
    VF2 Redline
    Yep, its very uncommon. My cracks are far less than that but it does happen. I still use DBA but I think their advice to avoid the cross drilled rotors for heavy braking applications is justified seeing as 4000 series T3 still crack on occasion of very hard use.
     
    Ron Burgundy likes this.
  8. panhead

    panhead Well-Known Member

    Messages:
    1,642
    Likes Received:
    1,325
    Trophy Points:
    113
    Joined:
    Jan 17, 2016
    Location:
    NSW Central Coast
    Members Ride:
    Cars
    I may be mistaken but that doesn't look like the rotor failed due to cracks coming from the holes.

    Also not all rotor holes are drilled, some are cast (more expensive) and those that are cast are much stronger and less prone to cracking, when it comes to rotors you get what you pay for.


    Cracking around drilled holes
    [​IMG]

    [​IMG]

    Heat is the big killer of rotors whether they are drilled or not and that's why they fail at the track
    [​IMG]

    [​IMG]




    .
     
    Last edited: Nov 28, 2019
  9. eman1

    eman1 Active Member

    Messages:
    236
    Likes Received:
    73
    Trophy Points:
    28
    Joined:
    Jul 14, 2011
    Location:
    newcastle
    Members Ride:
    VF2 Redline
    No it wasn't directly on the holes. I was more highlighting that DBA rotors do indeed fail on occasion and the seriousness of a failure.
     
    panhead likes this.
  10. panhead

    panhead Well-Known Member

    Messages:
    1,642
    Likes Received:
    1,325
    Trophy Points:
    113
    Joined:
    Jan 17, 2016
    Location:
    NSW Central Coast
    Members Ride:
    Cars
    Definitely all rotors will eventually fail if given enough punishment, even those designed and manufactured to the nth degree for serious track and competition use.

    I have to say though that drilled rotors are just for looks and if it a street car then I think they look great.






    .
     
  11. redvxr8clubby

    redvxr8clubby Active Member

    Messages:
    847
    Likes Received:
    152
    Trophy Points:
    43
    Joined:
    Jan 5, 2015
    Location:
    Sunshine Coast QLD
    Members Ride:
    VX Clubsport R8 & VE SS
    I'm pretty sure that the 4000XS is the same type I have on my VX R8 Clubby now (330mm in the case of the VX R8) . They look like a very nicely made rotor. I don't drive the car all that much and no hard braking, so can't say how they go in those conditions.
     
  12. KING46Calais V

    KING46Calais V Active Member

    Messages:
    202
    Likes Received:
    104
    Trophy Points:
    43
    Joined:
    Feb 27, 2018
    Location:
    Sydney
    Members Ride:
    2017 VFII Calais V 6.2L Sed
    My car never sees the track so it's mainly for a look and to enhance braking in the wet and be an upgrade from factory solid rotors.

    I'm sure all rotors can crack if they are flogged no matter how good they are. I think Ron was just implying that DBA are much better quality than your cheap eBay junk. But that still doesn't make them bulletproof.

    I'm interested to find out why the big euro performance manufacturers still fit drilled rotors to their cars.
     
    Ron Burgundy likes this.
  13. MattSAU2XR8

    MattSAU2XR8 Active Member

    Messages:
    109
    Likes Received:
    60
    Trophy Points:
    28
    Joined:
    Jan 23, 2018
    Location:
    Caloundra
    Members Ride:
    VE SS Auto 2007
    Looks better - so people will pay more, and so more profit.
     
    abuch47 likes this.
  14. eman1

    eman1 Active Member

    Messages:
    236
    Likes Received:
    73
    Trophy Points:
    28
    Joined:
    Jul 14, 2011
    Location:
    newcastle
    Members Ride:
    VF2 Redline
    Braking in the wet would be tyres as brakes can easily cope in the wet.

    A lot of people confuse plain rotors and solid rotors. The VF has non slotted vented rotors on all 4 corners not solid rotors, in non heavy use these actually perform better as there is marginally more surface area for the pad.

    Slotted or drilled see benefit when the pads heat up significantly and produce gas when needs to wiped by the slot to maintain good surface contact. (This problem is not as much an issue now as pad compounds are much better than in the past).
     
    426Cuda and wetwork65 like this.
  15. Ron Burgundy

    Ron Burgundy Well-Known Member

    Messages:
    2,242
    Likes Received:
    1,082
    Trophy Points:
    113
    Joined:
    Jun 3, 2004
    Location:
    NSW
    Members Ride:
    VF II SS
    I am about to fit T3 rotors in next few weeks. I only bought them because they look good.
     
  16. wetwork65

    wetwork65 A wet business

    Messages:
    710
    Likes Received:
    286
    Trophy Points:
    63
    Joined:
    Mar 12, 2006
    Location:
    Sydney
    Members Ride:
    VF SSV Wagon & VF SV6 Wagon
    Thanks eman1 - my opinion has always been that more contact area gives better braking.
     
    426Cuda likes this.
  17. panhead

    panhead Well-Known Member

    Messages:
    1,642
    Likes Received:
    1,325
    Trophy Points:
    113
    Joined:
    Jan 17, 2016
    Location:
    NSW Central Coast
    Members Ride:
    Cars
    Slotted brake rotors use slots carved into the flat metal surface to move gas, heat and water away from the surface of the rotors which ultimately gives better surface contact.

    The offset to the extra surface contact is they wear out the pads quicker.




    .
     
  18. panhead

    panhead Well-Known Member

    Messages:
    1,642
    Likes Received:
    1,325
    Trophy Points:
    113
    Joined:
    Jan 17, 2016
    Location:
    NSW Central Coast
    Members Ride:
    Cars
    Because drilled rotors are okay for street driven cars and in many cases high end performance cars have cast holes and this includes cast holes in ceramic rotors.




    .
     
  19. KING46Calais V

    KING46Calais V Active Member

    Messages:
    202
    Likes Received:
    104
    Trophy Points:
    43
    Joined:
    Feb 27, 2018
    Location:
    Sydney
    Members Ride:
    2017 VFII Calais V 6.2L Sed
    In relation to wet weather braking, I was referring to the short delay with the brakes biting after they have been through a puddle or soaked.
    I never had this delay with drilled, slotted, or drilled/slotted


    Yes my mistake about the rotors. I meant plain, not solid.
     
    Last edited: Nov 29, 2019
  20. KING46Calais V

    KING46Calais V Active Member

    Messages:
    202
    Likes Received:
    104
    Trophy Points:
    43
    Joined:
    Feb 27, 2018
    Location:
    Sydney
    Members Ride:
    2017 VFII Calais V 6.2L Sed
    Ah ha that makes sense as most high high end have ceramic rotors.
     

Share This Page