VN > VT Brakes

[lemusa]

Just wondering what's what. At the moment I have v8 (289mm) disks and calipers which came off an 8 as well but pretty sure they are the same for both 6 and 8. Standard 6 master cylinder.

I need more stop as I'm over the soft pedal/average brakes thing. Especially while towing.

I know it's been covered before but can I use VT master cylinder/twin pot callipers with my disks? From what I understand they bolt up fine to the strut but there is a couple mm difference in diameter between the vt but surely that would only mean slightly off pad wear?

Otherwise I need to sort some sort of hub adapter? Would rather not but open to opinions

[delcowizzid]

need bigger disks or the pad hangs over the edge of the disk

[lemusa]

dont wanna sound like an idiot but does that actually matter? obviously you'd lose a small amount of braking capability but surely id still be a big step up from what ive got?

[FstStig]

You will get uneven brake pad wear if you don't.

[Vt-Brrrlina]

try and find not_an_abba_fan he sorted out my brake upgrade very knowledgable on the subject..

[delcowizzid]

dont wanna sound like an idiot but does that actually matter? obviously you'd lose a small amount of braking capability but surely id still be a big step up from what ive got?

yes it really matters LOL no point having brakes that apply harder if theres 25% less pad touching the brakes

[gslrallysport]

Easiest option is this:
VE Twin Piston Upgrade Package suit VB-VZ Commodore!!!

The VE caliper runs smaller pistons, and has less flex (overall a MUCH better caliper than VT), so doesn't required a master upgrade at all.

[lemusa]

Easiest is not really the cheapest though, and as my car is stocko power wise there wouldnt be much point spendin that much on stopping power. Vt kit will set me back around 300 I think. I think il go that path. Any major dramas swapping master cylinder? And will I need to change booster?

[agrsv8]

i've done the VT conversion with the VT master and booster too, was a great buy, the first day i took it out i nearlly got T-boned, if i had the old brakes the car would have been a write off. Only bit of fabrication required is a bracket adapter for the booster to firewall and a set of adapters for the brake rigid lines

[VPRob]

better brakes sounds worthwhile. Do you get ABS with a VT up-grade?

[nathanVY]

You will need hub adaptors to use VT rotors. But you don't have to use VT rotors, you can get "VT Sized" rotors that would fit the VN Hub.

I'm selling a complete VT upgrade kit if you're interested, comes with the custom mounting bracket for the master cylinder so it just bolts up.

[AirStrike]

You will need hub adaptors to use VT rotors. But you don't have to use VT rotors, you can get "VT Sized" rotors that would fit the VN Hub.

I'm selling a complete VT upgrade kit if you're interested, comes with the custom mounting bracket for the master cylinder so it just bolts up.

Who makes said rotors?

[nathanVY]

Who makes said rotors?

Said rotors? am I missing something here?

VT rotors are 296mm, VS rotors are 289mm.

DBA make a 296mm rotor range that fits straight onto the VR-VS hub, i don't think they make them for VN though.

http://www.dba.com.au/products/DBA040B
http://www.dba.com.au/products/DBA040BSL

[AirStrike]

Said rotors? am I missing something here?

VT rotors are 296mm, VS rotors are 289mm.

DBA make a 296mm rotor range that fits straight onto the VR-VS hub, i don't think they make them for VN though.

http://www.dba.com.au/products/DBA040B
http://www.dba.com.au/products/DBA040BSL

That was my point, we are talking VN's here and no one makes a direct replacement.

[nathanVY]

Ah yeah quite possibly. Might have to look at upgrading to a VR VS hub as well

[AirStrike]

Ah yeah quite possibly. Might have to look at upgrading to a VR VS hub as well

If your going to that much trouble why not just get the hub adaptors?

[lemusa]

Yeah im not sure why id got to vr/vs hub and then get a "custom" disk for it when I could just go adapters. Does anyone know where I can get adapters in nz? I can source the rest easily enough its just the adapter Il need

Cheers

[nathanVY]

You said you didn't want to get adaptors? haha
Look on ebay man, I got mine for $60.

[lemusa]

I was looking for the easiest option, never said no to adapters. Just isnt that easy to source some things in nz as there isnt the same market, especially for vn's. Will have a look though

[AirStrike]

You said you didn't want to get adaptors? haha
Look on ebay man, I got mine for $60.

Can you please stop posting as all you are doing is giving false info. VB-VP require a complete replacement hub, VR-VS use a shim for the difference in centre bore. Hubs cost around $250-300 for a pair, the shims for the VR-VS are $40 (what I paid from race brakes for my VR, don't know where you got yours from).

[NOT 38]

dude. i done a twin piston upgrade a while ago, all you need is VP series 2 rotors( they are a few mm bigger than VN 1-2 and VP 1) VT twin piston calipers or VX not sure what VY VZ run. and a booster and master cylinder off a VN VP V8 as they are a 1 inch bore which will up the break fluid pressure. I got every thing from the wreckers for under $200.00, i did get my booster and master cylinder reco'd though. every thing bolts straight on except for the banjo bolt fitting u need to file it down a bit to get the right clearance.
happy upgrading.

[AirStrike]

dude. i done a twin piston upgrade a while ago, all you need is VP series 2 rotors( they are a few mm bigger than VN 1-2 and VP 1) VT twin piston calipers or VX not sure what VY VZ run. and a booster and master cylinder off a VN VP V8 as they are a 1 inch bore which will up the break fluid pressure. I got every thing from the wreckers for under $200.00, i did get my booster and master cylinder reco'd though. every thing bolts straight on except for the banjo bolt fitting u need to file it down a bit to get the right clearance.
happy upgrading.

Firstly the VN and VP range come in two styles the finned rotor 289x22mm setup or the non-finned 270x22mm. So lot's of VN's have the larger rotors (all V8's and any FE2 equipped car). The VT caliper and pad is designed for a 298x28mm rotor so please don't post your absolute rubbish setup. What happens when the pads wear down and your rotors? Pads loosing capture anyone?

[HamaTime™]

I know it's been covered before but can I use VT master cylinder/twin pot callipers with my disks? From what I understand they bolt up fine to the strut but there is a couple mm difference in diameter between the vt but surely that would only mean slightly off pad wear?

Otherwise I need to sort some sort of hub adapter? Would rather not but open to opinions

LOL.

No you can't use your discs, they are much smaller, 270X22mm which run with a smaller radius single 54mm piston caliper, compared to the VT twin 42mm piston caliper which is designed to fit on 296X28mm rotors...6mm thicker and 26mm larger in radius. Won't work mate...to be honest it's daft of you to even consider it.

You will need a new hub to fit the discs.

You will get uneven brake pad wear if you don't.

+1

Easiest is not really the cheapest though, and as my car is stocko power wise there wouldnt be much point spendin that much on stopping power. Vt kit will set me back around 300 I think. I think il go that path. Any major dramas swapping master cylinder? And will I need to change booster?

There are budget ways of getting around things, but what your suggesting is silly. My entire VT brake upgrade cost me $450 in parts. Granted you will probably spend a bit more on different hubs to suit the earlier model, but do the job properly, don't take dangerous or pointless shortcuts.

And you'd be silly not to change the master cylinder and Booster to the VT one's. Much better pedal feel/response.

That was my point, we are talking VN's here and no one makes a direct replacement.

Exactly.

You said you didn't want to get adaptors? haha
Look on ebay man, I got mine for $60.

Adaptors won't work Nathan, completely different hub.

dude. i done a twin piston upgrade a while ago, all you need is VP series 2 rotors( they are a few mm bigger than VN 1-2 and VP 1) VT twin piston calipers or VX not sure what VY VZ run. and a booster and master cylinder off a VN VP V8 as they are a 1 inch bore which will up the break fluid pressure. I got every thing from the wreckers for under $200.00, i did get my booster and master cylinder reco'd though. every thing bolts straight on except for the banjo bolt fitting u need to file it down a bit to get the right clearance.
happy upgrading.

erghhhh



Your joking right?

[UNLEASHED]

Just wondering, there seems to be conflicting replies with how these conversions are done. What is the best way to do the VT/X/Z caliper/disc conversion properly AND SAFELY?? (I have the hubs VT discs and calipers already-
VT master/VS booster,
VT master /VT booster some bracket(and how's it made/adapted?),
or VP 1" master/VP V8 booster?
Not going the VE caliper route atm(which I assume has smaller pistons, but the 15" SS rims will fit?).
Or do I have to start another thread??

[agrsv8]

I did the VT brakes with a VX/T Master and booster, to fit this you need 2 things depending on what original master cylinder you had,
1st: if you have a V6 VN/VP master cylinder you require a set of adapters to connect up the rigid brake lines to the master,
2ndly : you will also requires a couple of small metal plates to bolt the booster to the firewall, if you get the new and old booster and sit them side by side you will understand, it's not hard to fab up and once you are finished you will be rewarded with what feels like 5 times the braking capacity.
I'd give you pictures but i never took any unfortunately.