What needs to be done to put VT twin pistons on a VS??

[seanns]

Help please?!
what needs to be done to put VT twin pistons on the fornt of my VS?
becasue ive herd that you need to buy an adaptor of some sort, or somethign along those lines?
so if some could please help and advise me what needs to be odne would be greatly appriacted.
Thankss.

[greenacc]

you need to do the " VT brake upgrade " which includes larger discs. Search for that and you will find loads of info.

[PanthaVS]

Ok... from what i understand...

FYI: The VS hubs are the same stud pattern, but hub size is smaller than the VT one.

Step 1.
You need at least 17" rims (maybe 16"??) or the calipers won't fit inside the rim.
Step 2.
- You can buy stock VT brake disks and user spacer shims on your VS hubs to bring them up to the VT hub size. (Which is a bit Dodgey)
- Or special "upgrade disks" that mount onto VS Hubs.
(Code: DBA040BSL for Front Left & DBA040BSR for Front Right)
- I have also heard of swapping over the whole VS Hubs to VT ones. so the Stock VT disks fit. (DBA040SR and DBA040SL) but im not sure of this????
Step 3.
The VT calipers will swap directly with the VS ones. but you will need different flex hoses that go to the callipers, as the VT inlets to the callipers are in a different position.

Step 4.
after reconnecting all the lines, bleed the system.

Note: This will surfice, but... your pedal feel will suffer, as the pistons in the callipers now require more fluid, and hence, your pedal will push further to the floor, feeling more "soft" or "spongey" ...

To Rectify:

Step 5.
- Upgrade your brake master cylinder to a 1" or a stock VT one. This will reduce the travel in your pedal. (I think you have to change the booster as well?)
- This step will require you to make a new bracket or drill a new bolt hole on the master cylinder arm (or something?) so it mates up with your VS pedal box. a simple mod you can do yourself...

Step 6.
after reconnecting all the lines, bleed the system.


Big Note:
*** Modifying brakes may require an engineers certificate to maintain a RWC. As well as for insurance purposes, please consult a qualified engineer before performing any modifications to your brakes. ***

[stocky]

since he has a VS, the VT master cylinder will bolt straight up. no need for a VT booster unless he really wants it. VS might need brake lines bent a bit. apart from that, its an easy upgrade.

[VrWagz1]

*note no 1 inch master available for the vs they are different to the vn/r booster master setups. They are 7/8. So if you are unhappy with the pedal you can do some small mods(i think) to fit the vt master to the vs booster or you can do a whole booster master swap to the vt one, which i can reccomend.

But basically all as above

[ephect]

heres the how-to: How To - VT Brake Upgrade

would you believe it? it was in the how-to section and the disc's used in that how-to are the modified vt sized discs with the vs hub, so no shims.

[vsiicalais]

Also i would like to add, you can still run 15 inch rims, I have been running stock interceptors and vs berlina alloys without an issue. VT's also came out with 15 inch rims so no need to upgrade to 16 or 17's

[Welsh]

I was looking for the same information , so i signed up.

Start to finish tutorial: How To - VT Brake Upgrade thanks alot vsiicalais

And alittle food for thought: Press Releases
VE Spec Brake Upgrade from VB to VT

[dons vs]

i found on ebay some people are selling the vt booster and bmc for like $650 but then there is some guys selling them for $75 why such a big price difference?

what are the mods you need to do to fit the vt boost and bmc to a vr ute

[markovr]

Id say the 75 dollar special is sold as it was taken off the car but the 650 is probably new and has been modified to suit a older commodore as in this site if you look under mods Project VN AERO but you dont need hose adapters .

[Psmithavsupplies]

VS - VT Master Cylinder Conversion
Could some one please clarify for me with 100% certainty (ive been reading threads for hours)

Dose the VT Master Cylinder bolt strait on to the VS booster? or does the push rod have to be modified?

Does the VS brake line require brass adapters for the M.C.?

Do I put the VS resivior back on to the VT MC to keep fluid level? (should I purchase a seal kit before attempting)

Any help would be appreciated.

Has anyone made a "Step by step" and or "parts list" for the Master cylinder conversion specifically for VS - VT??
(is anyone prepared to??)

[Trikky]

VT master cylinder will bolt straight up to a VS booster, no pipe adaptors needed, you can either use the VS one or leave the VT one on(I have not bothered to put the VS one on mine)

[wraith]

VT brake swap is old and outdated. VE swap is a lot less complicated and easier by far.

[RX25SE]

VT master cylinder will bolt straight up to a VS booster,

NO it wont.

The pushrod on the VS booster is longer than VT so the master needs to spaced away from the booster or the piston will be compressed. Do not pull out the booster pushrod as you risk the reaction disc falling off.

The VS is booster is not powerful enough to cope with the increase in bore size of the VT master.


The VS reservoir will fit the VT master but the hole in the metal tab needs drilling and tapping in a different position.


Go VE and save all the stuffing around. You will get a better pedal feel and increased stopping power.

Props for not starting yet another VS to VT brake conversion thread!

[markovr]

VS - VT Master Cylinder Conversion
Could some one please clarify for me with 100% certainty (ive been reading threads for hours)

Dose the VT Master Cylinder bolt strait on to the VS booster? or does the push rod have to be modified?

Does the VS brake line require brass adapters for the M.C.?

Do I put the VS resivior back on to the VT MC to keep fluid level? (should I purchase a seal kit before attempting)

Any help would be appreciated.

Has anyone made a "Step by step" and or "parts list" for the Master cylinder conversion specifically for VS - VT??
(is anyone prepared to??)

List
pre vs booster bracket cut and bent on ends and piece of flat 2 mm steel welded to it to suit the bolt pattern and centre hole of vt booster fitted to;
Vt booster with hole in pushrod hole welded up and redrilled nearly a full hole forward to get the right pedal height
vt cylinder with vs reservoir bolted to it...seal kit not really needed.