I found this looking for rotors for my 2008 XKR with Alcons. Won't work for me but be of interest to 2010 plus guys. Anybody heard of them?

Jaguar XKR 2013 Brake Kits - Drilled & Slotted Rotors

 

I wouldn't touch drilled discs personally, most of the ones I've seen have developed cracks around the holes. Grooved or dimpled, if you must but the benefits are entirely cosmetic (and debatable) but I won't touch drilled ones.

 

Would have to agree.....the thought behind the drilled or slotted rotors is cooling, reducing gases. If your running your Jaguar with normal driving conditions and NOT tracking the car, I see no reason, other than looks or cosmetics to pay the extra for the drilled or slotted rotors.
Having drilled holes on a brake rotor makes it easy for heat, gas and water to be quickly moved away from the rotor surface.

On my 2009 XKR with Alcon rotors and calipers, the rotors have crescent shaped moons cut into the rotors. I can't see that serve any purpose except the looks of the (cosmetics) of the rotors themselves.

When I had my formula race cars, I had slotted rotors, which was used for cooling purposes under heavy and frequent braking in a race environment.

If you track your XKR the slotted or drilled rotors would be a consideration, otherwise, I wouldn't waste the extra expense to buy the drilled or slotted rotors, unless they can be priced at regular full rotor (non-slotted) price.

On the other hand, if you want that racier look than I can understand buying the drilled or slotted rotors, do they look nice/cool.

 

I'm with 8bit, and only consider slotted even with my aggressive driving style. However drilled is proven to be superior at heat dissipation over solid or slotted rotors.
As said, drilled tend to crack prematurely and present a possible safety issue, however, if your a track driver with deep pockets and/or sponsors, drilled will become your standard rotor of choice, but get replaced frequently.....


Vince

 

You can get a much better deal, less than $200 for a front pair and less than $150 for the rear pair from Brake Rotors Brake Discs Drilled Slotted Rotors and they have rotors for those with the Alcon calipers. I have used them with success and they appear to be identical to OEM.

 

What rotors did you choose for your 08?

Not that Tire rack is a track speciality shop but it's interesting for them to say that rotors that are drilled, slotted not for track use?

 

[QUOTE=Fastlane'scat;888723]What rotors did you choose for your 08?

I am just shopping right now. I have about 16,000 on the fronts as they were replaced under warranty at 6,500 and 22,500 on the rears. I heard that the rears go first at about 25,000 miles. If that is true I will probably have to stay with stock Alcons on the rears so they match they match the fronts. I am going in for a service on Wednesday so I will have them checked for wear.

Has anyone replaced their Alcons? If so, at how many miles?

 

[QUOTE=jleuz1;888897]Jack:

Another forum member who owns a 2009 Jag XKR w/ Alcons did some brake work. I am not sure if he just had new pads or rotors too.

His name is Stuart S and you could send him an email.

You may first want to determine what the tolerances are for the rotors front and rear, then have the Jag dealer or yourself put a caliper on them and take a measurement. Seems to me, it would be unlikely to replace the rotors at just 22,500 miles. I bet your within all tolerances. Besides, the rotors can be turned or shaved before going thru the expense of buying new rotors.

If your going to replace rotors you should also do pads at the same time. My understanding is cost at Jaguar dealer is about $1200-$1500 to complete the work. Possibly more if they insist on rebuilding the Alcon calipers and Brembo calipers on the rear. I am sure you have both Alcon and Brembo calipers on the rear. One red (Alcon) and one much smaller than the Alcon caliper in color black (Brembo). That's my setup on the 2009 XKR Portfolio Edition.

Hope this helps just a little.

 

No Alcon option on 2010 XKR right?

 

No, they were only available on 2008-2009 XKRs

 

jleuz1, It is a little confusing if you look at this site that lists OEM Jag parts.
Genuine Jaguar Parts Online at Discount - Jaguar Replacement Auto Parts

They have listings for Alcon brakes for 2010-2013 and also several different sizes of brake pads for non-Alcon for the 2010-2013. This site lists parts available for US models. All a bit confusing.

I'm not ready for pads/rotors quite yet (2010 XKR 14k miles), but will probably DIY so would like to gather the most cost effective rotor/pad info. I sure hope that they are NOT Alcon, as the parts listed seem to be about twice as expensive. They sure must be nice!

 

AVMIII,

I agree, that site is confusing since the Alcon option was not available on the 2010+ XKR. Here are pictures of the Alcons which might reassure you that you do not have Alcons.

 

If anyone has Alcon brake calipers and need brake pads and parts......

I suggest you contact Chris @ Alcon Brake Kits

He is very helpful and will assist to get you what you need.

 

On the 5.0 cars, there is something called "super-performance brakes" - that's what is listed in the build for my car. I suspect this is just the standard XKR system, which is also referred to as 'R' Performance Brakes or High Performance Braking System.

Comparing the various systems, we have:

4.2 XK: front: 326mm, single piston; rear: 326mm, single piston
4.2 XKR: front: 355mm, single piston; rear: 326mm, single piston
4.2 Alcon: front: 400mm, six piston; rear: 350mm, four piston
5.0 XK: front: 355mm, single piston; rear: 326mm, single piston
5.0 XKR: front: 380mm, dual piston; rear: 376mm, single piston

As far as I can tell, the R-S has the same system as the 5.0 XKR.

I'm sure there are aftermarket Alcon kits, but as far as I can see, there hasn't been a factory Alcon option for any 5.0 cars.