DrMEMS

Wayne,
What is the difference between the Sebro rotors with five 2-mm slots for $75 and the Sebro rotors with six 3-mm slots for $119.5--almost twice as much?

Vancouver996

I've been running sebro rotors and cool carbon pads , both of which I bought from pelican
in 2 years of street use they are low dust and noticibly better in the wet than oem spec pads , and fade less in the mountains on twisty roads

islaTurbine

Are they noisy?

PelicanParts.com

Great combo and thank you for your purchase.

The cool carbon pads have constrained layer noise shims that minimize the possibility of noise under all driving conditions. Can check out more info on them here, and let me know if you have any questions: http://www.pelicanparts.com/catalog/..._pg3.htm#item8

PelicanParts.com

Wayne doesn't run our forum posts, my name is Luccia.

The answer is in the question. One rotor has five 2mm deep straight cut slots and the other has six curved slots that are 3mm deep. I'm not an engineer, but I have to assume the one with more slots will be more effective at cooling the rotor and the deeper slots will certainly remain there longer throughout the life of the rotor. I don't know if the curved vs. straight slots makes a big difference or not. Only you can decide if the extra slot and the extra depth of the slots is worth almost twice as much money. These rotors are mostly used on track cars and some drivers want every advantage they can get. I hope that clears up things a bit and thank you for your question.

DrMEMS

I'm running Cool Carbon pads on stock Porsche rotors right now. I got the Cool Carbon pads mainly for their advertised low brake dust. After a few years of use, I can say that the dust generation is about the same as with the stock pads, which is bad. Braking performance also feels the same as with stock pads, which I rate as just fine. I've never been limited in stopping power by my brakes, but rather by my tires (Michelin Pilot Sport N-rated). I drive hard and autocross, but have not been on the track. I don't ride my brakes down long hills--I downshift my manual transmission--so my brakes never get hot.

DrMEMS

Actually, if you read the description, the width, not the depth, is specified. I went with the Sebro slotted rotors front and rear and the Hawk ceramic pads for low dust and a wide operating temperature range.

I'm curious to see what the Sebro slotted rear rotors look like. Most brands of slotted rotors are directional, implying that different rotors are needed for the left and right sides, but there was not such option for my 996.2 at Pelican and there was no photograph.

DrMEMS

I was pleased to receive right front, left front, right rear, and left rear Sebro rotors with six slots each. The two rear rotors have the same part number at Pelican.

Note that the tops of the slots lean toward the rear of the car.

Robstevens

DrMEMS

I'm happy with the rotors, but I don't know if I'd notice a performance difference so far. I got them from Pelican.
* Front left: 996-351-405-01-M896
* Front right: 996-351-406-01-M896 (yes, the part number is the same as the left)
* Rear: 996-352-401-04-M896 x2 (same part number for left and right, but I got the correct pair as seen in the photos above)

I selected the Hawk Performance Ceramic brake pads mainly for less brake dust.
* Front: PEL-HB550Z-634
* Rear: PEL-HB290Z-583
They do produce less dust, unlike the Cool Carbon pads that they replaced.
The downside is less friction. I have to brake harder for the same braking force in slowing the car. I still have plenty of braking power when getting off the freeway and testing this by slamming on the brakes. Initially I thought this could be due to the pads and rotors needing to break in (and I did follow Hawk's bed-in instructions), but after a few months I still have to brake harder. I also think that the braking is less linear, in that the brake force increases over a few seconds as the pads heat up. This correlates with the data Hawk shows at their website, in which the coefficient of friction increases dramatically as the temperature rises from room temperature. At really high temperatures, it falls off like most brakes do. I think for the next pad replacement I might go back to the Cool Carbon.

DBJoe996

I run the Cool Carbon pads and have found them to be very good, still some brake dust, but good pads overall. Brake dust is just something we have to put up with.

Vancouver996

Robstevens

az968gpw

I need to replace the rotors and pads on my 2004 C2 this year. Last year I installed Stoptech rotors and Porterfield street pads on my 968 and very happy with them. Anyone use this combination on your 996s? Low dust and great stopping. I don't track my car but drive aggressively on mountain roads.

Mike Murphy