Harold

Very interesting read, and indeed the math makes sense from a serious trackers point of view. I went through the exact same process of analysis and even looked at Movit. I ended up with the Endless mono block GT specs though for my car as I wanted to stick with steel which I tend to like the feel of more for the times that I use the car on the road.

Will definitely look at Movit next time round.

Out of interest, what tires were you using for the track days with the brakes. I have found that the simple change to R comps can remove any wiggle even with standard brake systems but that the R's can push the brakes a lot harder over a few more laps.

savyboy

Trofeo or Trofeo R

TF-Ent

In addition to this you never have to buy the rotors again. This means at minimum you can use the rotors on your next car and your next car. You only have to buy the full kit once.

ir_fuel

And how much certainty does one have that these rotors will fit the next car and the one after that?

TRAKCAR

100% if you keep buying 997 GT3's..And why wouldn't you?

Izzone

Because I have realized Rad is correct

430 SCUD or bust

I can run 1.5 laps, win DE cup.....and sit in pits drinking beer waiting for you clowns to come in

TF-Ent

At minimum the rotors can always be made to fit a new application. It would require new hats to be made for the new application. The rotors are 85% of the cost of the kits.

Dr.Bill

I thought the ceramic rotors were more brittle than cast iron ones. What happens if one gets dropped? Or hit with your 6-foot long torque wrench when changing center lock wheels? Or are these warrantied for life?

pissedpuppy

consdiering what the cars cost in Singapore...seems like it would be afordable IMO

savyboy

The OE PCCB are quite delicate, yet I managed to make it through many track days with them with no problems other than wearing much of the outer layer off. The MovIt/Surface Transforms Carbon/Silicon/Carbide friction disks are much less fragile than OE. Not willing to try, but suspect they could take a hammer blow.

Having a hard time understanding why a rotor manufacturer would warranty a rotor against abuse? If someone damages an item due to negligence then that would be their responsibility to accept.

savyboy

As Tom mentioned, a new hat could be made or one could sell the rotor in centerlock fitment to another Porsche owner. The point being that the rotor now carries residual value (a durable asset) and is no longer a consumable.

silverboy

I agree with John. I love the feel of my PCCB brakes.

George from MD

To paraphrase Newt Gingrich; if you can convince my wife that 30,000 dollar brakes are a bargain you've got my vote.

malmasri

Great review Savy....I do agree they are not for everyone.. but some here do not want the hassel of changing pads frequently every other DE ...etc...IMO this is a nitche product, the people that want it are not going to stumble over the 30k hill....
I know I have asked before about wheel size no 18 of course, but can you elaborate on the benefit of oversized rotors

savyboy

I am thrilled at the proposition of once every one or two year brake service. Especially with PITA CL wheels! There is a quantifiable value there.

Rotors:

• Greater swept area = more friction surface and more heat mass available for heat sink
• Monolithic vs core w/layered on suface on OE. Much stronger/more durable
• Thicker = more mass available for heat sink
• Carbon/Silicon/Carbide is exceptionally durable. Under normal use (NOT abuse - pad into rivets/backing plate) they simply do not wear. At all.
• Allows for use of physically bigger pad = more frction surface, more heat dissipation, wear over larger area.
• Greater surface area allows for more precise brake force modulation for example when trailbraking (all else being equal)

Here is the official spiel:

"Explanation of MOV´IT-CER ceramic rotor:

Polyacronitrile fiber sheets are needled together to create a PANOX preform. The
future rotors are cut out of this preform. These "raw" discs are carbonized at >1500°C
to convert the Polyacronitrile fibers to carbon fibers. These carbonized rotors are then
densified during a 14 day chemical vapor infiltration process. The rotors are then
carbon-carbon. The rotors are then machined to the final geometry. Some faces are
machined over thickness to allow for future machining. Now high rate silicon
infiltration coverts the carbon-carbon rotors to a carbon silicon carbide rotor within
approx. 16 hours.
finally, all faces are machined to the given tolerances and dimensions using
polycrystalline diamond machine tooling which is required due to the hardness of the
material. Finally, a strict x-ray scan and porosity check to ensure the same density
throughout the entire rotor.

Advantages of the MOV´IT-CER rotor ceramic rotor over a cast iron rotor:
- Weight
- Lifetime
- Cost

The first improvement of a MOV´IT-CER rotor over the cast iron rotors is the reduced
weight. The weight is reduced by approx. 50% over a same size cast iron rotor (more
is not realistic although others claim). So this means a saving of between 4 and 8 kgs.
(!) on each corner of the car. As a result, the car feels as if it is "lighter", responds
better to the throttle and handles amazingly better. to give an example: driving over a
bump on a highway at 70 mph, this bump can be heard AND felt in your feet and in
the seat. If you take off 6 kg from each wheel, you will still "hear" the bump, but you
hardly feel it anymore since the wheel is so much lighter and follows to the road much
quicker. The next important advantage is the much quicker steering response. The car
seems to "eat" the corners, turning right or left is much "lighter" and the car turns in
the desired direction much quicker and more accurately.

The second important advantage is the lifetime.

A MOV´IT-CER rotor is extremely strong. Only polycrystalline diamond machine
tooling is able to machine the surface of this rotor. The wear of this rotor is much less
than the wear of a cast iron rotor. While replacing several cast iron rotors, the
MOV´IT-CER rotor can be left on the car and just the pads will ever need to be
replaced.
One big advantage of the MOV´IT-CER rotor compared to other ceramic rotors is the
many times higher lifetime of the MOV´IT-CER rotor.

The MOV´IT-CER rotor is made in a completely different way than all other ceramic
rotors. a MOV´IT-CER rotor starts his life as Polyacronitrile laminar fiber sheets,
which are needled together in way that the fibers are oriented only in two directions (0
& 90°). This long fiber structure is kept for the entire production process until the rotor
is finished.

As a result, the thermal conductivity and the thermal capacity of the MOV´IT-CER
rotor are much higher compared to ceramic rotors that are used on some production
cars these days. Those rotors are made out of a chopped fiber compound, so the fibers
are much shorter which results in a bad thermal conductivity and poor thermal
capacity. Of course the strength of those rotors is also reduced due to the lower
material integrity. Since the structure of the MOV´IT-CER rotor is the same
throughout the entire rotor, the lifetime is several times higher than the lifetime of the
chopped fiber version. The MOV´IT-CER rotor can be used all the way down until the
fading resistance and / or pedal travel is no longer satisfying. This will take years of
hard use and thousands of miles. So talking serious, as long as you want to have the
MOV´IT-CER rotor on whatever car, you only buy it once and take it from one car
into the next. Just change the hats and caliper supports. In our opinion, this is one big
advantage of the MOV´IT-CER rotor over the chopped fiber production rotors found
on some production cars produced these days since those have to be replaced once the
0.5 mm thick friction layer is worn.

Another important advantage of the MOV´IT-CER rotor is the much faster cooling
compared to other ceramic rotors. The long fiber structure transfers the heat
throughout the entire rotor quicker and thus dissipates the heat much quicker than a
rotor with short chopped fibers that cannot transfer the heat.

As a result of this highly sophisticated and intelligent design of the MOV´IT-CER
rotor, the cost of the complete brake at the end of the day is much lower than the cost
for normal, cast iron rotors. The lifetime is many times higher, so one invests money
only once to enjoy many years along with the benefits of reduced weight, improved
stopping AND handling of your car."