OK I did a search and the only thread that came up listed a reference to a broken link...

Does anyone know if anyone's making a stock size lightweight rotor? I'd prefer a 2-piece setup to so I only have to replace the rotor and not the hat down the road.

I don't need more braking power (actually brake torque) per-se nor do I overheat my brakes at the track (finally figured out the Nordschleife after 350 or so laps!) so I don't need bigger brakes or more heat sink capacity--I just want less weight to spin up when accelerating.

I already have studs on the car and typically run 5-to-12mm spacers depending on the wheel setup I'm using so I should be able to adjust for any reasonable brake hat offset issues.

Thanks in advance for any references...

 

dba

 

A link: http://www.dba.com.au/2006/new_produ...er_upgrade.asp

 

Thanks

 

These shown are the 320mm parts for the R56 JCW parts if I follow the numbers correctly.

I also looked at producing oe sized replacements in two piece a few years ago but the cost just did not justify the gains. With any reasonable two piece set up coming in at about $550pr even the replacement 'rings' don't make this a wise purchase. There are simply too many stock replacements on the market (here anyhow) that can be had for much less money.

The pros; lighter overall weight, lower moment of inertia, possible directional application and perhaps a bit less heat transfer to the bearings. Possible upsize to larger rotors later for different calipers a plus.

The cons; costly, no gains in thermal capacity due to same size overall part, no gains in brake torque or efficiency there, value of directional castings minimal at lower speeds.