Bora V6 Disc brakes

[revhead1016]

Hi all, I will be up grading my front and possibly the rear disc brakes very soon. Do you guys know what size is disc brakes fitted in 2001 bora 4motion V6 in factory setting and what size disc I can fit to my car legally?
Thanks

[Back Door Shenanigans.]

Stock brake size on a V6 4mo is 312mm x 25mm vented on the fronts and rears are 256mm x 22mm vented. I think there's no law against how big but i do believe you aren't allowed to go smaller than stock. No point in going bigger discs unless you get bigger callipers and pads to accommodate them other wise its wasted.

I've got a big brembo kit on the front. Be warned that if your upping size its going to cost you specially if you get it from Australia. Mine was around 1.7k with rears landed from uk. Quote for the front was 4k over here.

Also might be worth doing a bit of research into bigger brakes as it can really hamper your performance if you go too big as your adding more rotating mass and bigger brakes wont actually make you stop any quicker if your all reading engaging ABS, It will reduce the chance of heat fade but that's only worried about on a track.

Heres a link to common upgrades.
VWVortex.com - The brakes of the MK4 platform - OEM and Upgrades

Hi all, I will be up grading my front and possibly the rear disc brakes very soon. Do you guys know what size is disc brakes fitted in 2001 bora 4motion V6 in factory setting and what size disc I can fit to my car legally?
Thanks

[Golf-Sam]

Hi all, I will be up grading my front and possibly the rear disc brakes very soon. Do you guys know what size is disc brakes fitted in 2001 bora 4motion V6 in factory setting and what size disc I can fit to my car legally?
Thanks

not entirely sure .. but i was told that R32 Brakes will bolt right on .. easy upgrade ..

Sam

[dylan8]

i thought brakes had to be engineered if changing...?
not that your going to be caught out.

312mm for the front and 256mm for the rear as BDS said.

[revhead1016]

@back door shenanigans. Thanks for the springs man work well.
@sam r32 is the same as bora. Reason why I need to up grade or change is on heavy braking in getting vibration. I did get my brake check and the mechanic said it ok. Any sudgestions?

[Back Door Shenanigans.]

i thought brakes had to be engineered if changing...?
not that your going to be caught out.

312mm for the front and 256mm for the rear as BDS said.

Had to and should do are different :S, Technically you need to do it for wheel, suspension and a whole lot of other crap.

@back door shenanigans. Thanks for the springs man work well.
@sam r32 is the same as bora. Reason why I need to up grade or change is on heavy braking in getting vibration. I did get my brake check and the mechanic said it ok. Any sudgestions?

No problem glad someone could use them

Heavy braking and vibration to me says that the discs are warped which is causing it to pulsate. Should be able to check that by just touching the pads and it should grab and let go feeling like pulsating. I'm guessing you've had the wheels balanced and all that. The usual solution would be to machine the discs but i vaguely recall someone telling me that you can't do that on vw discs (needs to be checked)

[dylan8]

R32 brakes are bigger then the 4mo both front and rear.
so they are a awesome oem upgrade.

I agree, probably just warped brakes. Depending on how bad, you maybe able to straighten them back out by wearing them back into place by braking.


yeah true BDS, even putting plugs in for floor mats technically needs to be engineered. but really...

[revhead1016]

I was thinking of just replacing the disc but if I can salvage them I will do it. I'll take it back to my mec and get the re check.

I saw some brembo max disc brakes of eBay. But I though before I buy them I should do some research first. So far your feed back is helping

[Manaz]

not entirely sure .. but i was told that R32 Brakes will bolt right on .. easy upgrade ..

Sam

Yes and no. They bolt right on - but you need OEM 17" wheels (or 17" wheels with similar clearance). I have the R32 brake setup myself. As BDS noted, bigger brakes aren't necessarily better (though the R32 ones are in my experience, as they're a twin-caliper at the front, though the rears are exactly the same). Be aware that the local rotor price for the R32 option from VW is about $600 per side (though you can get them cheaper from ECS). And as BDS also noted, you're dealing with a heavier set of equipment when you upgrade, which means more unsprung mass and more rotational inertia to deal with - your handling and steering are definitely affected.

Unless you're really sure you want to go bigger (the stock brakes are hardly poor), I'd go for better pads and fluid first, then maybe braided lines. There's not a lot of benefit getting the fluid anywhere but local (you can get good DOT 5.1 fluid locally - do NOT get DOT 5, it's totally different), add some ECS RedStuff pads perhaps, see how that goes. If you want better still after that, I'd go for braided lines before going for a larger brake option.

[Manaz]

R32 brakes are bigger then the 4mo both front and rear.
so they are a awesome oem upgrade.

The Mk4 R32 brakes are *exactly* the same at the rear brakes on the Bora V6 4Motion. 256x22mm ventilated, single piston, calipers painted blue on the R32 to match the fronts.

For what it's worth, check what brake options are available for the 225hp Mk1 Audi TT in America, as it has the same brake setup as the Bora V6 4Motion here.

I agree, probably just warped brakes. Depending on how bad, you maybe able to straighten them back out by wearing them back into place by braking.

You fix rough rotors by machining them, and you can sometimes fix *VERY* mildly warped rotors by machining them. In general though, European car rotors get replaced more often than rotors on Jap/Aussie cars.

Incidently, pulse through the pedal is generall warping/rough surfaces. Vibration through the steering can be this, or it can also be an unbalanced wheel. Worth getting your wheel balance checked too.

yeah true BDS, even putting plugs in for floor mats technically needs to be engineered. but really...

That's stretching things a little dude.

The R32 brakes for instance do not require engineering on a Bora V6 4Motion because they came as a factory option on cars with the same chassis designation (1J). The same goes for putting Bora V6 4Mo brakes onto a GTI (GTI only came with 288mm front rotors - but then it also only came with 110kW stock too).

[revhead1016]

I just had them balance and aligned and also replace the front lower bushing, as well at the shock top spacer (I think is the right term). I just try to do the heavy braking as a test and that's what I found, it's not a heavy vobration, but first thing come up on my mind is that the disc is worped, and just to make sure maight as well replace the pads. Watch this space.