vz ss brake upgrage for vr v6

[peckzz]

got a pair of vz ss brake calipars front, rotors and hubs front, also the bottom arm, which is the same as the vr, all that is different is the shocks, all up they cost me $100, so thought it was worth it and cant believe it all just bolted on with no hastles what so ever, arms and hubs the lot

all i need to upgrade is my master cylinder from a 15/16 to a 1 inch and that should do the job

[RazzaCaine]

nice bargain there, certainly beats doing a vt brake upgrade. whered you managed to score all that gear so cheap? or do you mean just the shocks cost $100?

[peckzz]

na he gave me the shocks and hubs and brakes, all i used was hubs, brakes and the arm, gonna give him the shocks back 2 morro night, $100 for all that, he is a mate and owes a few favours i guess lol but yea lucky, are the vt brakes twin pistons? these brakes are HUGE, they only just fit in my 17inch rim, wont fit 16's, lets just hope i dont get a flat in the front wheel, will have to do the old swap around wit the back wheel lol as my spare is only a 15

master cylinder is $50, gettin that 2 morro

[RazzaCaine]

yeah i think the vts are twin piston but they fit under 16s so obviously the vzs are considerably bigger still. sounds like you got a great deal with them. how does the car pull up now?

[RX25SE]

You may find the 15/16" master a better option than the 1" unit.
The larger bore master will cause the pedal to be firmer (but travel less) so you will need to push harder to generate the same braking force.
It's really only VS that require a master cylinder upgrade as they have a 7/8" bore master which causes a low pedal.

Is your car ABS equipped?

[nathanVY]

pics!! sounds like a good idea.

[markovr]

vz master isnt bolt up

[peckzz]

the brakes are fatter as well as bigger, they are 35mm thick instead of 25 or 30mm like vt's

ive bled them and re bled them but the brake is real spongy, so i will have to go the bigger one, but RX25SE, you say it wont be better? but it will stop it from being spongy and not firm?

no abs on it either does not matter, the master cylinder i got was for a abs car and did not have enough holes in the cylinder which really sucks, because it was dirt cheap as well

pics will be uploaded tonight

[VrWagz1]

thought vz's were the same as vt brakes?

[markovr]

thought vz's were the same as vt brakes?

my vz are .......28mm thick fronts

[peckzz]

is your vz the ss 6.0 litre model?

ok sorry it took so long, i grabbed some photos and i know a few are blurry but u can just make out what it says on the tape measure, its bout 32mm for the thickness and 320mm for the diameter but as i said its hard to see, and it says on the rotor min thickness 30mm

and pics are big sorry

[VrWagz1]

How is that brake line for legnth on full lock? Jst looks short in the pic. Calipers look the same as usual vt/x/y/z stuff. But as far as the rotors, im not sure on what options/sizes came on what models.

[RX25SE]

Looks like 2005-6 SSZ rotors. They are 320mm x 32mm.

Part# DBA2020

I wonder if the caliper piston diameter is the same as std. VT-Z??

BTW. Maybe remove the hacked off bit of old hose!

[peckzz]

found this on a forum, dunno how much truth to it there is

WAY88T
18-10-2009, 09:21 PM
just a quick question about the brakes on the vz ss 6ltr .. is it just the front caliper that they changed or the rotor as well .. and the rears are standard still ?.. ( sizes of the rotors would help .. have tried to look it up but can not find anything)

any help would be great
Sideshow.
19-10-2009, 05:16 PM
The SSZ has 320mm front rotors and 290mm rear rotors, and yeah the front caliper is larger than standard SS, still twin piston though. I'd assume the series 2 VZ (6L) would have the same size brakes. The SSZ also has vented rear rotors, i'm pretty sure the earlier ones were solid.

so i would say they are ssz brakes, because i know they are off a ute, so the calipars are larger than standard as well as the rotors

vz ute ss or ssz? [Archive] - Australian LS1 and Holden Forums

edit, just read what you wrote above, so they are ssz brakes, and to answer your question the calipars are different but still only 2 piston. that doesnt really answer your quetion

and yea i know, gotta buy a new anglegrinder as all the teeth in mine have sheered to nothing :S unless it unbolts from behind which i doubt, but will get onto it

edit also found this on that same page

"As of 2006 and the 6.0 models, they kept these big brakes, but removed the red coating, reverting to "stock" finish."

[RX25SE]

Interesting.

If the pistons are larger than std ones then this would explain the low spongey pedal.

That old bit of hose can be removed by undoing the clip.

[Cheap6]

It's difficult to tell from the pictures but is it correct to surmise that the pads have been swapped inside to outside in the caliper? If so, it should be possible to measure the piston dia. from the imprint on the pad with out even removing the wheel. VT- std is 2 X 42mm.

[Not_An_Abba_Fan]

Looks to me like you have the 330mm PBR upgrade kit, as the VT-VZ stock brakes were all the same.

[peckzz]

so thats a good thing??

what size master cyldiner should i go? its got 15/16 in it, 1 inch ? getting a vn 5 litre (original not converted), would that have it in it? if not what size master cylinder do they use? and will i need to upgrade my booster?

[VrWagz1]

Lots will disagree and some who have done the upgrade will agree that goin the whole hog and doing the vt/x/y/z booster/master upgrade is the only way to go with these bigger brakes. Compared to the stock vn,p,r,s brakes these things are huge and nothing that came standard on the 1990's commodores(bar vt) really has the capability of running these calipers effectivly.

[peckzz]

yup so its a booster upgrade as well then