Rob996

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I'm driving a 2010 GT3 with PFC slotted rotors matched with PFC 08 pads in front.. Rears are OEM with PFC 08 as well. Very pleased with balance and performance..These rotors have about 12 DE and open track days..

Having heard and read many conflicting opinions of when to replace these PFC rotors and should be used until the slotted.. I'm concerned about the size of the cracks while the slots are still visable..

Pictures taken today both right and left..

Rob996

Other side

Hatzenbach

Here is my personal opinion: before I switched to Girodiscs I had Sebro slotted rotors and I tossed them out way before they looked as bad as yours. I wouldn't gamble on rotors that look like these

bgiere

Wow, 12 days ? I raced my 996 cup all season long (7 race weekends) on one set of Alcon floaters.....Cracks were about half of what yours seem to be...How is your brake cooling ? What is your braking technique ?

surlynkid

Call Clark at Apex and get some girodiscs.

Olemiss540

Need more cooling!

Rob996

Thanks very much for your comments..

Clark at Apex is shipping over a new set...

Do you believe the PFC 08' pads are too hard on rotors! I'm replacing rotors to pads at 2:1..
In other words two rotors for one pad.. Doesn't make sense..

winders

PFC 11 compound pads put less heat into the rotors and are easier on them. It couldn't hurt to give them a try!

GT3DE

Those cracks are fine and normal. pfc rotor is good until a crack is at the edge.

FWIW, if you are doing track days, you should have a replacement set of pads AND rotors with you to change on the fly.

And if you buy a second set of hats, then you can premount the front rotors so changing at the track is easy, fast and you won't burn your fingers.

ir_fuel

It's not really comparable I guess. I used to do track days with a 997.2 GT3, and I am running a 996 Cup now. The 996 Cup is a lot easier on the brakes. They seem to last forever compared to my 997 street car. I guess the weight difference plays a huge role.

Gofishracing

I wouldn't run those rotors. Some of the cracks are going to connect.

Rob996

Here is a great comparison... freshly installed new PFC slotted rotors.
They won't look like this for long,,

Happy motoring

Jason987.2

I've seen this written around... but where else will the heat go?

mark kibort

hahaha! !more wives tales !!

mark kibort

yes, rob, those are toast. you probably get some good vibration at the start of a session , no? i dont think they are goign to fly apart, but i would defilntely change them now. no reason to push it. 12 DEs? thats a long life. see the high and low spots?? thats small scale (warping) they are not working as well as a new set would.
bury them and say a little prayer.