For those who may be interested in 2 piece discs for R32/Cupra/S3 brakes

[DaveB@Vagbremtechnic]

Price is £400 a set, and if we can get a sale of ten, this will be discounted by 25% per set. Not sure yet if this includes VAT and delivery, but I will aim for that if possible.

As it happens the brakes are now available so details to follow soon.

At that price count me out - you can get 360mm B5 RS4 discs for 360 with VAT and thats OEM quality with ground not turned friction faces, thats a lot of money to shell out for 2-3KG Saving whilst still using iron calipers. Just buy the S3 lower arms and buy them once.

I could warp three sets of solid discs and still be in front.

Having said that etto and all the best with it

[fuscobal]

Wow, took a look at their gear and the most expensive calipers are 480 ??? A complete kit for 800 ? This is 1/3 of the competition's price. Anybody care to explain ?

[owen lcr]

true, might be worth someone being a guinnie pig first and doing a review on them over a month or so?  just a thought

[DaveB@Vagbremtechnic]

Before we get giddy - could somebody weigh them or find out what they weigh?

There are many various grades of rotors available. Consider Mike Robert's Alcons glowing red hot F1 style when snapped at Oulton park and him driving to work on them the following day and then consider if you'll be able to to do something similar with a two hundred quid pair of rotors (Bells are more or less universally 100-150 quid to manufacture) AP Racing bolt kits are 40 quid for the pair for a reason....... for floating bobbin kits you can double that.

Quality costs

[djhorace]

Before we get giddy - could somebody weigh them or find out what they weigh?

There are many various grades of rotors available. Consider Mike Robert's Alcons glowing red hot F1 style when snapped at Oulton park and him driving to work on them the following day and then consider if you'll be able to to do something similar with a two hundred quid pair of rotors (Bells are more or less universally 100-150 quid to manufacture) AP Racing bolt kits are 40 quid for the pair for a reason....... for floating bobbin kits you can double that.

Quality costs

As I said before details to follow 

[tony_danza]

Unless they're fully floating discs, I wouldn't bother.

Because of the way Alcon's bobbins are designed, I can see from the marks they leave in the bells' powder coating the discs grow by 4-6mm in diameter when hot. It's because of the floating technology and quality of materials, they don't do what is pictured below.... which will happen to non floating or crap discs if you hammer them on track.

If you just want them for the road, ask yourself why you need them??

Saving weight. Do the wishbones/hubs instead as these are permanent.

Asthetics. Rotors that look nice costing say £300 each time they need replacing (which may be more often than you account for, if the grade of metal is poor) doesn't make sense.

Performance. You'll see no benefit. Pads, fluid and the clamping force of the caliper are the variables to play with. Get some really hard pads and just accept you'll be ruining £80 OEM discs twice as often, or invest your £400 in some decent calipers which again are permanent.

[Jono76]

Unless they're fully floating discs, I wouldn't bother.

Because of the way Alcon's bobbins are designed, I can see from the marks they leave in the bells' powder coating the discs grow by 4-6mm in diameter when hot. It's because of the floating technology and quality of materials, they don't do what is pictured below.... which will happen to non floating or crap discs if you hammer them on track.

If you just want them for the road, ask yourself why you need them??

Saving weight. Do the wishbones/hubs instead as these are permanent.

Asthetics. Rotors that look nice costing say £300 each time they need replacing (which may be more often than you account for, if the grade of metal is poor) doesn't make sense.

Performance. You'll see no benefit. Pads, fluid and the clamping force of the caliper are the variables to play with. Get some really hard pads and just accept you'll be ruining £80 OEM discs twice as often, or invest your £400 in some decent calipers which again are permanent.

Couldn't have put it better myself 

[djhorace]

Each to their own. You could replace OEM discs every time they have issues, and as mentioned above, it would probably cost more than discs for a 2 piece set seeing how you only need the bell one time, and the OEM disc till be heavier and more prone to warping due to being less able to get rid of the build up of heat.

[japper]

Each to their own. You could replace OEM discs every time they have issues, and as mentioned above, it would probably cost more than discs for a 2 piece set seeing how you only need the bell one time, and the OEM disc till be heavier and more prone to warping due to being less able to get rid of the build up of heat.

I'm still interested, any update on details / pics etc. ?.

[tony_danza]

Discs don't warp. People melt pads onto discs, high spots build up and cause vibrations.

[djhorace]

Each to their own. You could replace OEM discs every time they have issues, and as mentioned above, it would probably cost more than discs for a 2 piece set seeing how you only need the bell one time, and the OEM disc till be heavier and more prone to warping due to being less able to get rid of the build up of heat.

I'm still interested, any update on details / pics etc. ?.

Details to follow 

[djhorace]

Sorry for the delay in this folks.

OK, so here are the details.

The 345mm 2 piece disc will in fact be designed and made in the next month or so.

Typical weight savings. Standard discs that size usually weigh in at about 12kg maybe a bit more and thats per disc.
A rotor that size will weigh 6.4kg and the bell well at the most 1kg. So if we over estimate and say 8kg which it will be lighter than that we would be saing 4kg at least per corner. Thats 8kg+ just on the discs.
 
The Powervane racing rotor has had many tests and has been proven to run cooler and produce outstanding braking performance when compared to other makes.
 
One example is on the Seat Leon Cupra R MK1 with the Brembo kit. Customers with these have said on a track day there is so much heat with the standard Discs that touching the wheel after being out is impossible. However when they fitted the 2 piece Disc conversion they stated that touching the wheel was possible and that the temperature of the wheel was massively reduced.
 
The cooling properties of the Rotors are from a Combination of the internal veins being the correct size and being at the optimum angle to produce the maximum amount of air flow and the composit material used in the Rotor Manufacturing.
 
On Group buys of 5 pairs discount level will be 10%
On Group buys of 10 or more discount level will be 25%
 
List price for the kit is £400, so if we can get 10 people interested, these will be available for £300 per kit. The kit is basically everything needed to replace the standard front brake discs to a lighter 2 piece kit.

[japper]

Great news, i'm in.

Can you spec plain discs ( non grooved ) and do you get a choice of bell colour?.

[PDT]

Just a quick note for people interested in these discs, the same company making these will have a MK5 4 and 6 pot kit available for around £900 very soon.

Just to bring up something DaveB said, quality costs and these brakes dont. I used to sell these kits, not any more. Anyone can give a disc a fancy name , cut some grooves into them and add a shiny alloy bell. I am not saying that people shouldnt buy them and they will crack etc...

[PDT]

Discs don't warp. People melt pads onto discs, high spots build up and cause vibrations.

I have about 30 warped discs round the back of the unit. cheap discs can easily warp, especially EBC turbogrooved discs, even when checked with a runout gauge you can sometimes get up to 1mm of deflection on a warped disc.