VoilaGT3

Well, atleast he made it clear he is not the one I spoke with. To touch on the disconnected points he brought up(I am unaware of what was asked of him).
The original question/proposal: Is it possible to fab a 2pc. rotor for the 2009 Cayenne Turbo S like the Audi allroad 380mm which uses the same 18Z caliper as the Q7/ Touareg/Cayenne(per Girodiscs website) the GT3 discs were mentioned in my discussion as it already has the correct lug spacing. . . The gentleman I spoke with was very informative and clear that once the 10 minimum persons commited to it, they would dig deeper to verify fitment needs. Offset for the hub plates, rotor thickness, etc. It is seemingly a standard new item process. To further clarify, we also discussed the possibility of them getting factory rotors and modifying them. So to clear up the "mis-information" Audi Allroad 380mm rotors, modified to a Porsche GT3 RS type of center plate as a basis for this project was not expressed to mis-lead anyone. Refer to the original post and lets get this going!

P.S. to make the $ make sense, current products are $1k+/-, to have a single item fabbed rough total cost $3k+/-, per my discussion(absolutely not legally commited to) $2k/10 persons = $200. . .

VoilaGT3

Back in the lime-light great custom fabbed rotors for less than OE slabs!

hatchetf15

“P.S. to make the $ make sense, current products are $1k+/-, to have a single item fabbed rough total cost $3k+/-, per my discussion(absolutely not legally commited to) $2k/10 persons = $200. . .”

So could you please clarify the cost per side, as you understand it? The best current deal for a pair of front OE discs is $1600.

hahnmgh63

Voila to be clear, the standard Turbo has 18Z calipers and you have 19z per the earlier post from JBI which is correct. A 380mm disc might work with a 18z caliper but on the stock Porsche spindle there would most likely have to be a spacer used. And for Trinitony's post earlier, that site shows a 356mmx32mm caliper. The stock 955 Turbo front Rotor is a 350mmx34mm. That would put that Rotor new right at the minimum thickness Porsche recommends for changing. With a little rear your Caliper pistons could be over extended and in a Heavy panic (DE Track use) stop they could fail out of the piston bores. That is a Taiwan company so they are going to try to sell you anything and tell you it's fine, and for a cheaper price no doubt. You will find no reputable Brake supplier OEM or Aftermarket that will try to sell you 32mm discs to replace an original 34mm disc.

P.S. I did notice FCP Euro has factory original supplier SHW discs for the front of a E-81, Turbo S, etc... 380mm x 34mm for $721. That's a good price and I've never used their Lifetime warranty (rtn shipping would be costly) but they say if you return the part purchased from them you get a new part. A friend actually buys oil and some other parts for his Audi from them and returns them for a replacement. It's got me tempted.

Also, Girodisc is an awesome company too with a great reputation. I'm using their Rotors on my track 911 and my street Audi RS5 (upgrade to 380mm from 365mm).

theprf

I got the SHW disks for the CTTS from eeuroparts.com for about 1250 for the pair.

hahnmgh63

That's even better from FCP Euro although if you're not too far from FCP, their purchase one time and then return for a lifetime warranty, including normal wear would be the better deal. Although I'm in the process of moving my vehicles to Hawaii and some things are out of the question. It can cost close to the same to ship as the parts itself.

TRINITONY

My 09 CTTS rotors are 380mm, about $450 a pair.

VoilaGT3

from where? I am finding $1800+/- a pair.

VoilaGT3

as per my discussion with the guys at Girodisc it would be $600 per side.

VoilaGT3

lots of good info thanks, 1 thing that I wonder is the rotors for an 09 CTTS are 380x38mm. I don't think I would want to go narrower. 19Z being the Turbo S, good distinction, just clicked for me . I have faith in the guys at Girodisc and per my request and our discussion I was told no problem. Grab 10 people and we will develop them. I must be looking at the wrong sites if people are finding OEM and stock rotors for $450-750 a pair?

TRINITONY

Current pricing is a lil higher as this was from a few years ago.

TomF

Wow that's a great price! Where are you finding these? I see that they are 380 x 32 MM... aren't stock 38 MM thick?

TRINITONY

Hi Tom, these are PB Brakes. Lupo.sk ran them and recommended them to folks. Remember he's the chap that drove religiously at 145+ mph, so brakes were important to him.

To run the above setup I believe you would have to have matching calipers.

PO photos.

hahnmgh63

To run those 32mm Rotors you do not want to use a 18z or a 19z caliper. Remember, these rotors new are less than the minimum for a OEM brake rotor and would have your caliper pistons sticking out too far. On a high speed panic or track stop the pistons would be force out hard against the rotor and can start to tilt/wear/bend in the bores and there is a high chance of failure of the Piston and/or the seals. Go to a Porsche club or track even with any reputable brake rep there from Brembo, Girodisc, Baer, WIlwood, etc... and they'd laugh at the idea of putting a narrower rotor into a 18z or 19z caliper. Now if you have a custom/aftermarket caliper that is narrower then go for it, although I'd still be leary about your Taiwanese rotor's qualtiy.