RayGT3

Well, I'm going to finally order a pair of replacement front floating hat rotors for the OE steel rotors currently on the car this week. I've read several of the previous posts in reference to this and I would like to confirm that Alcon would be a best choice from a quality and low noise standpoint. Do the Alcon's fit without shims or spacers? If there might be any other "quiet" rotors I should consider please let me know. As the car, will be street driven mostly, with speradic track outings. If anyone knows of a an Alcon local, state side, supplier along with appropriate P/N's, it would be appreciated.

As a side note, I thought I remember someone mentioning that Brembo has come out with a genII floating set up that was supposed to much quieter than the origonal.

As always, any comments relative to this would be most appreciated.

DanH

Hi Ray,

This is all I could find in terms of US dealers :

Offices

USA

Alcon Components (USA) Inc
Illinois

T +1 (847) 788 0901

F +1 (847) 788 0947

E pstubbs@alconusa.com

T +1 (704) 799 2723

F +1 (704) 799 2287

E jthomas@alconusa.com

Distributors

USA (north)

C & R Racing
Indianapolis

T +1 (317) 293 4100

F +1 (317) 293 4110

BSR Products
Concord
North Carolina

T +1 (704) 795 0901

F +1 (704) 795 7403

Hoerr Racing Products
Peoria
Illinois

T +1 (309) 691 8789

F +1 (309) 691 8796

Randall Race Parts
Mooresville
North Carolina

T +1 (704) 658 0071

F +1 (704) 658 0073

E solutions@randallraceparts.com

Roush Performance Products
Livonia

T +1 (800) 597 6874

F +1 (743) 466 6941

STaSIS Engineering
Sanoma
California

T +1 (707) 935 9700

F +1 (408) 353 9458



The fronts do require spacers as the disks are 360mm. Not aware of any other quiet options.

Don't have any part numbers unfortunately although I'm sure you could get the US end to speak to the UK. I think you may end up being the first US guy with these disks though, so it may require extra effort

RayGT3

Dan,
Thanks for all the info. Looks like I'll have to make some phone calls. In regards to the 5mm spacer, would this come with the rotor set or is this something I would need to specifically request from Alcon? Also where exactly is the spacer placed, do I need to move the caliper out to accomodate the slightly larger diameter? Sorry for all the questions, I just hate to have everything all torn apart and end up with a warm beer in my hand and scratching my head wondering where I went wrong.

Ray

DanH

When I bought the disks, they came with the requisite parts. Pretty sure I got new bolts for the front callipers and 2 spacers per side. The new bolts being longer to accomodate the spacers. You have surmised correctly, that the spacers push the calliper out 5mm to accomodate the larger disk. No real difficulty in fitting them, just need to make sure they are aligned correctly as one spacer is flattened on one edge to ensure disk clearance (don't worry this is easy to do and it doesn't move as you tighten it all up).

I think you might be best served by phoning alcon USA and asking about these disks. I'm not sure whether the spacers + bolts etc are supplied by the UK supplier JZ Machtech, or whether JZ Machtech have an exclusive distribution deal in place or something on the disks. Perhaps even a call to JZ might be worthwhile and see what they can do for you (I appreciate shipping disks to the US might be prohibitively costly).

roberga

ask your local porsche guy about Wrightwood. They make great high quality steels. Had does supply a number of the race teams. They are locate in Southern Ca(Oxnard) but only deal with shops. They will not sell direct.

Z06

Get the J hook non floating AP race rotors, made by wrightwood.. the floating make alot of noise.

RayGT3

I've been told that AP has moved away from the "J" pattern and gone to something else entirely. Not sure what, I'm working on finding out what.

guykoken

I have Brembo floaters on the fronts, which are made for the 996 GT3. You can purchase them at HRP (hrpworld.com). They are two piece (rotors and hats), with J hooks and are 350mm, so they screw right on to the hub with the factory screws. Their performance is great, and they are long-lived since there are no holes to crack. However, they are terribly noisy, so noisy that I now avoid driving my car on City streets. I doubt that any other brand of two piece rotors will be less noisy so long as they are not modified so as not to float. Apparently, with some Brembo models, springs are available which are placed between the clips and the hat so as to hold the rotors lightly in place, which eliminates the clanging but retains the floating. However, those springs are not available for these particular Brembo floaters.

Richard Bain

LastGT3

Richard - how many km (track) are you getting on your Brembos - I ask because replaced my rotors (steel OEM) with cup rotors (porsche motorsport) about 2000 track km ago and have the usual cracking - which is fine and still usable.
How much are you getting?
(FYI - a gentleman by the code of Z06 seems to have 18,000 km mixed track and street on AP floating rotors Front (ceramic OEM rear) and they are very good shape (smooth rotors - non-drilled and non-slotted).

Mike K.

Brembo floating will last twice as long as the drilled, Cup or oem. The hat will live through about 5 rotor changes before it will need to be changes as well .

LastGT3

Thanks - that pays for the change cost. I'll switch.

guykoken

Last GT3:
You asked:
"Richard - how many km (track) are you getting on your Brembos - I ask because replaced my rotors (steel OEM) with cup rotors (porsche motorsport) about 2000 track km ago and have the usual cracking - which is fine and still usable.
How much are you getting?"

I'm on my second season with them. My best guess is about 50 hours of track time so far, with very modest non-track driving in between. The J hooks are still visable, but by the end of this season, it will be time to switch them. The actual wear compared to the Motorsport rotors is better, but probably not significantly bette; say 150 to 200%. However, because there are no holes and they float ( i.e., not in contact with the pads until you depress the brake pedal), there are no grooves, and, more importantly, because there are no holes there are no cracks to worry about. If it's longevity you are after and are prepared to tolerate the noise, which is considerable (the clacking sounds like something is about to fall off the car, except while you apply the brakes), I heartily recommend them.

Richard Bain.