mk5 brake upgrades

[Maverick]

Oh FFS, it was reproduced by buybrakes from info from the Brembo site - buybrakes are an authorised Brembo dealer.

Even if it was from the Brembo website (I couldn't find it) it doesn't mean anything when you have so much evidence to the contrary, read the physics document I posted as it clearly shows why more mass is better and that drilling holes and reducing the surface area is pointless (like installing the GTI brakes on an R32).

Mercedes had a service campaign on their drilled rotors for cracking shortly after they released them. The only reason they offer them is because people think they perform better, at the end of the day the manufacturer is going to supply what people want including gaudy colours.

http://www.uucmotorwerks.com/rotors/

"NO DRILLING! Drilled holes in rotors often used for "show" are prone to cracking and catastrophic failure. The holes create stress risers which will lead to this sort of failure. Additionally, drilled holes do not improve cooling, rotary-vane rotors lose efficiency when drilled because cooling air does not not pass through the rotor circumferentially but is instead prematurely evacuated by the holes.."

No ***** - however Mischa wants bang for buck and not a car to run every weekend in the Australian Production Car Championship. That's why IMO I suggested R32 discs and callipers (undrilled and unslotted BTW!)

I didn't suggest anything to Mischa, the discussion was on drilled rotors. My recommendation would be to use solid or slotted along with better pads and a higher performing fluid.

Attached: pic of brakes used by Tossers to stop a 2 tonne car from 400kph as inefficiently as possible. Braking described by Gordon Murray (an initial critic of the Veyron) as "phenomenal".

And you do realise that the Veyron doesn't use conventional cast iron rotors like we're discussing here?

http://en.wikipedia.org/wiki/Bugatti_Veyron#Braking

"The Veyron's brakes use cross-drilled, radially-vented Carbon fibre-reinforced Silicon Carbide (C/SiC) composite discs, manufactured by SGL Carbon, which have a much greater resistance to brake fade when compared with conventional cast iron discs. The aluminium alloy monobloc brake calipers are made by AP Racing; the fronts have eight[12] titanium pistons and the rear calipers have six pistons. Bugatti claims maximum deceleration of 1.3 Gs on road tyres."

Unhappily it goes to show that there is no one definitive answer here. It depends on what you need the brakes for. For racing, perhaps slots are the way to go. But racing brakes are a poor choice for the road.

There is a definitive answer here.

For street use solid rotors with a decent pad. For more more extreme usage including the street use a slotted rotor with a decent pad. Avoid drilled and drilled/slotted unless you're after a tosser look and like to have your rotor disintegrate at some point in the future.

[Blitzen]

So how long have you had drilled rotors??

[Jarred]

For the sake of mischa's sanity, can we please stay on topic.

The original question was regard brake upgrades for a mk 5 GT.

Nothing was mentioned about debating pro's and cons of various types of disc's.

Please save us from going around in circles.

[VW Convert]

For the sake of mischa's sanity, can we please stay on topic.

The original question was regard brake upgrades for a mk 5 GT.

Nothing was mentioned about debating pro's and cons of various types of disc's.

Please save us from going around in circles.

Well said Jarred, I'm getting dizzy.

Cheers

George

[572]

I put a link to the MK5 DBA brakes on the previous page, ithw part numbers for all. Just take them to any REPCO or Auto Barn, and they will be able to get you a price.

Ryan

Mischa - FYI, DBA 'Street Series' Slotted Rotors for the MKV GTI are ~$190 ea

[tinto]

For the sake of mischa's sanity, can we please stay on topic.

The original question was regard brake upgrades for a mk 5 GT.

Nothing was mentioned about debating pro's and cons of various types of disc's.

Please save us from going around in circles.

wow... it is not off-topic. Why is that an issue here?
If you want to upgrade your brakes, then you want to know what works & why - that is what this brake discussion has become.

I don't understand the mentality of wanting to lock down/stifle more technical info (with the odd snappy comment thrown in) from appearing on the site under the broad topic of brakes.

People will eventually come to this site, see question/answer and leave, as well-intentioned janitors have sanitised any sort of discussion.
A discussion forum should promote *discussion* around a topic, not be a one dimensional FAQ centre. This isn't a wiki (is it?)
Discussions like this one are what makes this site successful.

Excuse the OT post on not being OT... Carry on chaps.

[mrx]

I think a can of red paint for the calipers/carriers should do the trick. Everyone knows red brakes stop faster!

[PhilMart]

Anyone got an idea of how much the OEM rotors cost? If around the same price or more will be going for DBA when mine get to minimum width!

[BarneyBoy]

Even if it was from the Brembo website (I couldn't find it) it doesn't mean anything when you have so much evidence to the contrary, read the physics document I posted as it clearly shows why more mass is better and that drilling holes and reducing the surface area is pointless (like installing the GTI brakes on an R32).

Mercedes had a service campaign on their drilled rotors for cracking shortly after they released them. The only reason they offer them is because people think they perform better, at the end of the day the manufacturer is going to supply what people want including gaudy colours.

http://www.uucmotorwerks.com/rotors/

"NO DRILLING! Drilled holes in rotors often used for "show" are prone to cracking and catastrophic failure. The holes create stress risers which will lead to this sort of failure. Additionally, drilled holes do not improve cooling, rotary-vane rotors lose efficiency when drilled because cooling air does not not pass through the rotor circumferentially but is instead prematurely evacuated by the holes.."



I didn't suggest anything to Mischa, the discussion was on drilled rotors. My recommendation would be to use solid or slotted along with better pads and a higher performing fluid.



And you do realise that the Veyron doesn't use conventional cast iron rotors like we're discussing here?

http://en.wikipedia.org/wiki/Bugatti_Veyron#Braking

"The Veyron's brakes use cross-drilled, radially-vented Carbon fibre-reinforced Silicon Carbide (C/SiC) composite discs, manufactured by SGL Carbon, which have a much greater resistance to brake fade when compared with conventional cast iron discs. The aluminium alloy monobloc brake calipers are made by AP Racing; the fronts have eight[12] titanium pistons and the rear calipers have six pistons. Bugatti claims maximum deceleration of 1.3 Gs on road tyres."



There is a definitive answer here.

For street use solid rotors with a decent pad. For more more extreme usage including the street use a slotted rotor with a decent pad. Avoid drilled and drilled/slotted unless you're after a tosser look and like to have your rotor disintegrate at some point in the future.

Boring .

[gregozedobe]

snip

I didn't suggest anything to Mischa, the discussion was on drilled rotors. My recommendation would be to use solid or slotted along with better pads and a higher performing fluid.

snip

IMHO this post was definitely ON Topic, relevant, useful and not boring (but perhaps not as polite and bland as some would prefer )

I don't mind a bit of solid substance in what I read. If it is too technical you can always skip to the next post.

[limmy]

hey all - need help while on the brake topic. need new front discs and pads for my mkv gti.

anyone recently changed them and how much did you pay for parts only. any ideas on aftermarket parts?

anyone running vented zimmermans?

[poyta]

Mischa,

I'm in the same boat as you with my GT, looking to get some better brakes so I'm eager to hear how it turns out for you. I'm getting a quote on a 4 new DBA Rotors and some performance brakes pads. Not sure if I should go the slotted or slotted and drilled but prefer the drilled and slotted just purely for the looks. I've been advised this will be around $1000. As much as I like the idea of the R32 brakes I'd love to know where you can find some? If the dealer is asking $700 per rotor I dont even want to know the price for a set including calipers. Yeah the best thing would be to find a wrecked R32 but the chances of that are pretty minimal.

[Yevvy]

I don't think brakes are mischa's priority anymore or even on 'to do' list...

PS: Get your S2 running!

[BarneyBoy]

Mischa,

I'm in the same boat as you with my GT, looking to get some better brakes so I'm eager to hear how it turns out for you. I'm getting a quote on a 4 new DBA Rotors and some performance brakes pads. Not sure if I should go the slotted or slotted and drilled but prefer the drilled and slotted just purely for the looks. I've been advised this will be around $1000. As much as I like the idea of the R32 brakes I'd love to know where you can find some? If the dealer is asking $700 per rotor I dont even want to know the price for a set including calipers. Yeah the best thing would be to find a wrecked R32 but the chances of that are pretty minimal.

A wreck (if you can find one) is the cheapest way to go for sure.
If you want new have a look here:

http://www.autotech.com/prod_brakes_frtbrakeconv.htm#mk5

for the fronts, and here:

http://www.autotech.com/prod_brakes_rrbrakeconv.htm

for the rears.
Same as the R32 brakes (Zimmerman?) except with grey calipers rather than R blue (easily fixed!).
Not dirt cheap, but what is?
BTW, they'll drill &/or slot them for you if you so desire.

[william]

i have a freshly referbished set of r32 fronts off adrians car 30ks on them painted black looking for 1k