Page 1 of 2 12 LastLast
Results 1 to 15 of 28
  1. #1
    casual poster bluev8vl's Avatar
    Join Date
    Apr 2007
    Location
    vic
    Posts
    160

    Default Vt brake upgrade on vl questions?

    hey ppl just fitting some vt brakes on a v8 vl
    ive just got hold of a vt brakes complete with booster and master cyclinder rotors lines calipers.
    just ordered the hubs.

    will i need any other parts to complete the conversion. or is there any issues in fitting vt booster/cyclinder?

  2. #2
    casual poster 180sc's Avatar
    Join Date
    Oct 2008
    Location
    brisbane
    Posts
    360

    Default

    The vt booster wont fit without modification but you can fit the vs booster straight in and the vt master will bolt to that.

    i found this a while ago should help with the booster/master side of things.

    How to adapt the VT Master Cylinder to early model Commodores.

    (Required when VT Twin Spot or Nissan 4 Spot Brakes are fitted.)

    The principle behind this is that the standard 1" master and booster from the early V8 and turbo models give a less then satisfactory pedal feel and stopping power. Using the below parts, you can achieve a massive improvement in braking power with less pedal effort required.

    It is highly recommended on the VT Twin Spot Caliper Upgrade and also the Nissan 4 Spot Caliper Upgrades.

    It is more or less a straight forward bolt up proposition, with just a few small, but important modifications.

    To do the following upgrade you will need the following.

    + VT Master Cylinder ($75 from wreckers)
    + VS Plastic Brake Booster from V6 models only ($75 from wreckers)
    + VS Master Cylinder Reservoir (purchase new from Holden about $10) (Part No. GM-VS21166)
    + 3 Brake line Adapters (Available from Cebco for under $50 delivered) (Only required on pre VR models)
    + Dot 4 or equivalent Brake Fluid

    Step 1.

    On the V6 VS plastic booster, unscrew the adjustable bolt in the end of the pushrod.


    Step 2.

    Cut the head from the adjustable bolt you just removed and put a small slit into the end of it with a hack saw, so you can use a straight blade screwdriver to screw it back into the pushrod on the booster.

    Note: You must cut the head of the adjustable bolt short enough so it can become level with the pushrod on the booster.


    Step 3.

    Screw the bolt back into the pushrod and use locktite to lock the thread on it.

    Note: Make sure its 100% level with the pushrod itself. The only reason we screw the bolt back into the pushrod is to stop the hollow push rod from collapsing, it may fatigue over time from it being hollow. The bolt will strengthen it. So please don't just leave it out.





    Step 4.

    Remove the VT Master Cylinder Reservoir with the small bolt on the side and fit the brand new VS Reservoir.

    Note: If your careful the seals in the bottom of the master cylinder will be fine and you can just push the VS reservoir into place without replacing the seals. We fit the VS reservoir so it sits level and can be filled properly, the VT item sits on an angle and prevents the master from holding the proper volume of fluid when used on early model commodores.



    Step 5.

    Screw in the line adapters with the copper washers supplied and torque up firmly.



    Step 6.

    Bolt the VT master cylinder to the VS booster.

    Step 7.

    Now you can bolt it into the car the same way as your removed your old setup and bleed the brakes, starting from the Rear Left, Rear Right, Front Left and finally Front Right.

    Note: The emergency brake light connector will plug straight on to the VT master cylinder.



    If you followed the above you should have achieved a greatly improved pedal feel and improved braking power.

    It is amazing how even the single diaphragm V6 VS unit give more power and assistance then the highly overrated double diaphragm steel unit from the early model V8 and Turbo vehicles.



    Article put together by RB30-POWER from calais turbo.com in 2005

    You also may have to get specific lines to run from the early fixed line to the later calipers as the flares are different. Where you got the hubs from should be able to help there, while your at it you may aswell upgrade to braided line to give even better pedal feel.
    Last edited by 180sc; 02-11-2010 at 05:56 PM.

  3. #3
    been here .......too long Smitty2's Avatar
    Join Date
    Mar 2007
    Location
    bayside Melbourne
    Posts
    9,476

    Default

    Quote Originally Posted by 180sc View Post
    The vt booster wont fit without modification but you can fit the vs booster straight in and the vt master will bolt to that.
    .............
    good tips and hints there
    and to my knowledge..it should all work with one exception

    no-one I know (inc me) has been able to just bolt a VS booster to an early (VB-VL)
    without some problem. The major hassle is that the VS booster pedal rod is too long
    If you hook it up (as it comes) you have the brakes half on ...

    The other hassle is that the firewall bracket from a VB-L needs some slight mods
    to bolt to the back of the VS booster ...but easily fixed

    cheers
    __________________________________
    ONE OF THE Aussie V8 MODERATOR/ADMIN TEAM
    Never late in an AussieV8!
    Club circuit racing...the best fun you can have with your pants on

  4. #4
    casual poster 180sc's Avatar
    Join Date
    Oct 2008
    Location
    brisbane
    Posts
    360

    Default

    i currently have a full vs braking system in my vh wagon, only modification required was to the length of the line front to rear and some bending of front to suit the engine bay and they work perfectly. However some adjustment was required to the adjustable bolt mentioned in above post.

    no modification required to the bracket on the back of the booster the vs one bolts straight in. The problems you mention are the problems you have when using a vt booster.

    Oh one problem that i did forget is clearance of the booster with tall rocker covers on early heads but this is not a problem when using vn onwards heads and rocker covers.


    Last edited by 180sc; 02-11-2010 at 10:55 PM.

  5. #5
    casual poster bluev8vl's Avatar
    Join Date
    Apr 2007
    Location
    vic
    Posts
    160

    Default

    will i need brake line adapters 4 the calipers to the vl lines?

  6. #6
    casual poster 180sc's Avatar
    Join Date
    Oct 2008
    Location
    brisbane
    Posts
    360

    Default

    yes the vl has a different flare but you can buy the lines to suit from any good brake shop.

  7. #7
    casual poster bluev8vl's Avatar
    Join Date
    Apr 2007
    Location
    vic
    Posts
    160

    Default

    cheers

  8. #8
    Part of the furniture PIT-308's Avatar
    Join Date
    Apr 2010
    Location
    brisbane
    Posts
    1,317

    Default

    Nice.....

  9. #9
    casual poster tresurehunt's Avatar
    Join Date
    Jan 2008
    Location
    sydney
    Posts
    201

    Default

    rather than start a new thread i need the same kind of info as above but with a vt booster !

  10. #10
    casual poster bluev8vl's Avatar
    Join Date
    Apr 2007
    Location
    vic
    Posts
    160

    Default

    so if i put the vt master cyclinder on the old v8 vl one will that do any difference?

  11. #11
    casual poster 180sc's Avatar
    Join Date
    Oct 2008
    Location
    brisbane
    Posts
    360

    Default

    it wont fit.

  12. #12
    casual poster bluev8vl's Avatar
    Join Date
    Apr 2007
    Location
    vic
    Posts
    160

    Default

    cheers just put the brakes on got the hubs now waiting on brake lines

  13. #13
    casual poster 350ovk's Avatar
    Join Date
    Apr 2010
    Location
    Caboolture
    Posts
    136

    Default

    I recently fitted a vs booster and master cylinder into my vk, it bolted straight in
    no modifying, all hoses connect up. still plenty of clearance between booster and rocker cover,
    i can email a pics for this thread if someone can give me a email address to send it to..

  14. #14
    Part of the furniture
    Join Date
    Feb 2010
    Location
    Mandurah wa
    Posts
    874

  15. #15
    been here .......too long Smitty2's Avatar
    Join Date
    Mar 2007
    Location
    bayside Melbourne
    Posts
    9,476

    Default

    an update

    VS Master Cylinder Reservoir (purchase new from Holden about $10) (Part No. GM-VS21166)
    is 'nla' from Holden
    __________________________________
    ONE OF THE Aussie V8 MODERATOR/ADMIN TEAM
    Never late in an AussieV8!
    Club circuit racing...the best fun you can have with your pants on

Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Brake upgrade
    By Aliti in forum Holden V8's
    Replies: 18
    Last Post: 30-11-2011, 07:00 PM
  2. More HK to HQ brake upgrade questions
    By RobMKX in forum Bodywork, Styling, Wiring & Sound
    Replies: 5
    Last Post: 19-04-2010, 07:26 AM
  3. Brake upgrade
    By ayios in forum Bodywork, Styling, Wiring & Sound
    Replies: 22
    Last Post: 17-06-2007, 09:37 AM
  4. HZ brake upgrade.
    By birdy in forum Bodywork, Styling, Wiring & Sound
    Replies: 4
    Last Post: 01-07-2006, 11:57 PM
  5. who has the vt brake upgrade?
    By evil_ss in forum Bodywork, Styling, Wiring & Sound
    Replies: 16
    Last Post: 27-03-2005, 10:14 AM

Posting Permissions

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