Harvey Yancey

I am in the process of sourcing parts for a brake job on my '05 Cayenne S, and want to use slotted or crossdrilled rotors but have been unable to find a source in the forum.

I did find one vendor on eBay but apparently they take solid Zimmermann's and machine them. I am not sure how that would affect the integrity of the rotors.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170554097678&ssPageName=ADME:X:EAC:MOTORS:3160
Does anyone have a good source for slotted or crossdrilled rotors or have experience with ones that have been machined?

TIA

pdxjim

And why do you want them cross drilled?

mudman2

they look pretty

Harvey Yancey

Personal preference.

Andy E.

Harvey, like you I scoured the internet looking for cross-drilled rotors for the Cayenne and after speaking to many vendors and mechanics, I was told that machining stock or aftermarket rotors may eventually cause fatigue cracks.

If you really want cross-drilled rotors, go the route of custom-made stainless-steel units as they will last a long time however, you may have to sell your first-born or re-finance the Cayenne to buy them.

user 83838290

http://o-brake.com/en_index.php

try here. they can also individually custom make a set for you

Harvey Yancey

Looks like solid rotors for me! Thanks everyone!

rgp944

So called "drilled rotors" are cast with holes and machined after casting. Drilling holes in a plain rotors results in stress risers and cracking of the rotor.

Harvey Yancey

Right ... just using the common terminology.

Little Green

I have Powerslot rotors on mine(Slotted not drilled) Work great and less than stock Brembos which were loud and ridiculously dusty

ECS Tuning

To get the cross-drilled look, you can do some parts bin engineering and put 996 GT3 front rotors on the S.

James Herne

There is a reason Porsche didn't use drilled discs on Cayenne. Drilled discs are not used on offroad cars. If you stay on tarmac, you can change to drilled discs, but it doesn't make your car better.

jurnes

the functional reason for both is to allow hot gasses from the pads to escape, hopefully reducing pad transfer. Pad transfer is what many incorrectly refer to as warped rotors.

Slotted rotors are structurally superior to "drilled". Slotted are also a lot less messy regarding brake pad dust.

I run RSS GiroDisc rotors on my 997.1 C2S. I will be changing the rotors on my 2009 Cayenne S to slotted when replacement time comes.

Boeing 717

I bought some Ebay drilled and coated zimmermans a couple of years ago. The guys were up in New Jersey if I remember right. They have been really good, no cracking, no warping, excellent stopping power. Have a protective coating on hat and edge so no rusting etc. I would buy them again in a heartbeat. Probably put 15,000 miles on them so far and they still look like new.

mudman2

good pix Jerry