slate blue

They come from the 2010 GT2 and are very light at 2.8 kgs or 6 pounds without pads. A very good selection of race pads are available and the discs that are normally used are the 350 mm ones and Brembo makes a 2 piece lightweight version which I most likely will run. Those discs weigh around 6 kgs and are the 997 Cup Car disc. That is without the hat. The hat may bring it to 7 kgs all up. Now that is extremely good considering that the Ceramic discs weigh 5.6 kgs.These rear calipers are cheap, there is lots of red sets on Ebay.

you can get them a bit cheaper than that but again they are light and quite stiff use a very generous pad at 190 mm

http://www.braketechnology.com/brakes/2707.html

Now this requires to run a 64 mm annulus disc, I could in theory run the 350 mm Cup Car disc but it will foul the lower ball joint on the cars with early suspensions as they are a wide annulus disc with 34 mm in width. I am going to use 32 mm and these are lighter at 8.4 kgs without hat or around 9 kgs al up. Those discs are used by the EVO IV and the Brembo dealer said they are gravel discs. There is also a slightly different version, not sure how different, same weight within 50 grams and dimensions etc.

These will weigh more than the F50 355 mm setup by 2 kgs each or 3 kgs more than the equivalent ceramic setup, however I an told this gives more endurance and develops less heat. Did I mention the calipers have ceramic pistons like the Cup Cars have for repelling heat they use the same pad design. The calipers weigh around 6 kgs each without pads.

The mounts are different spacing at 142 mm versus 130 mm for our existing brakes, I plan to design an adaptor for the S2 stub axle as I like the extra scrub radius early version offers especially with the 9" front wheels with 69 mm, this is effectively 3 mm worse that the Club Sport wheels. If anybody else is interested or potentially interested in adaptors please let me know, it wont happen till the end of the year so that gives people some time if you need it.

Just as a point of interest the ceramics don't have any more stopping power, they don't stop any quicker, The steels weigh around a 10 kgs more all up than ceramics and cost a lot less, no difference in life expectancy on the track. I think that comes down to the fact the ceramics are insulators and the iron discs are conductors, so once the ceramics get hot you can have a lot of trouble due to the fact it can't get rid of its heat. The racers on the Rennlist certainly dump their ceramics.

Cheers Greg

brianrheffron

Another good reason to stick with cast iron discs for track use
is that ceramic discs can be totally destroyed if a bit of "Kitty Litter",
i.e, gravel from run off areas, gets caught between the disc and the calliper.
With a C.I. disc you would probably get no more than light scoring or less.

123quattro

Other than that, carbon disks are use for life, even if you track the car. The local Ferrari dealership has never replaced a disk, ever.

hacker-pschorr

Nice work Greg!!!

Then their ceramic disc customers either never drive their car or they are going somewhere else:

http://www.ferrarichat.com/forum/sho...d.php?t=112544


http://www.ferrarichat.com/forum/sho...d.php?t=265889

Lizard928

I was actually just last night talking with a stoptech rep at a local auto parts show.

I am looking to do 380mm setup on the front of the 928.
He has said that if I tell him the dimensions needed for the hat that they will just slightly mod the 997 hats before they are machined for little to no extra money!

123quattro

Maybe guys in MI drive like sissies? I have heard nothing but good things about carbon brakes. Their only downside being massive entry price.

Edgy01

I ordered them for my car when I submitted my order a few years ago. It was a worthwhile investment. My brake maintenance consists of changing the brake fluid every 2 years. Period. The pads and rotors last a long time for aggressive street driving. I used about 0.6mm of pad material in 35,000 miles of driving. Rotors? No wear at all.

slate blue

Hacker is correct, the wear starts to happen when the discs get real hot, which is on the track when being pushed hard. They are also very enviromentally unfriendly. The reason they cost so much is they go in an oven at a couple of thousand degrees and stay in there for 2 to 3 months, nice to develop for technology sake but it is an extra cost that none of us need.

Colin you may want to check this setup out as they can be run with the 380 mm disc too. I am just going to run the 355 mm disc do to the fact that I have 18" wheels. There is a new set of cup car brakes on Ebay AU right now with used 380 mm discs. They are around $1400 USD with 1 day to go, that is a good buy but you can get these calipers for less that $1400 without discs, or if you don't want ceramic pistons the red version of these calipers is about a grand for the pair. Not bad for six piston calipers. The stoptech will be more expensive I would have thought.

Greg

Lizard928

The stoptech rings are just over $200/piece the cutom hats will be a little pricey, but IMO worth it.
Also 380mm can fit under some 18" rims.....

stuartph

When i had my brake kit made, i was suprised at how cheap the custom parts where, the AP discs and calipers on the other hand were not cheap