The issues of burning up $14,000 dollar rotors come to my mind. Do any of you use aftermarket cast rotors for street use in order to avoid a costly replacement of these brakes? Plus, what are your thoughts on the brakes? Do you like PCCB? has anyone tracked with them? How long do they hold up with vigorating heat conditions?

Andy

 

Please do a search on this forum for PCCB. We have a lot of lengthy comments on this topic.

 

Yes this has been discussed at great length. The short answer is, they don't seem to hold up well under heavy track use and may tend to get a little noisy on the street. If you have an option I would recommend against getting them but if the car aleady has them there are steel brake options out there and hopefully soon there will be a steel rotar available that will be a direct replacement for the PCCB rotar

 

Unfortunately, neither does the cast iron rotor setup hold up well under heavy track use. Many have reported the need to replace the steel rotors after ~ 1000 track miles and less -- Bob R. got 9000 track miles out of his PCCB's. The real problem with the GT2/3 cars is inadequate brake cooling under heavy track useage conditions.

For street use, the ceramics will last the life of the car. My bet is that PCCB rotors will come down significantly in price in the future, as Porsche starts fitting these brakes on more cars in commng years. Dealer retail pricing for reconditioned ceramics is at $4k vs $1k for new steel rotors.

 

I'm afraid I have to disagree here. I can't and won't speak for the carbon ceramic rotors since I don't have direct experience with them but the iron rotors work fine. Performance and longevity have met expectations. I'll probably go with slotted rotors next so I don't have to worry about the holes clogging up (which will significantly degrade performance and longevity as with any iron rotor) but that's about the only reason. I'm just one person but there are a lot of people on here that track GT3s with the iron rotors - if there were "many" failing I think we would have heard about it.

 

ok I did some searching and I came across a topic to get steel rotors for the car. Who sells aftermarket steel or iron rotors for GT2s??? Evo Motorsports just sells a 15" Brembo kit and S-Car-Go only does engines...

Andy

 

Bob -- I didn't use the word "failing" and I respect your right to disagree. What I said was that the GT3 stock cast iron rotors don't hold up that well under heavy track use. There have been several posts, (at least equal in number to the ceramic horror stories) on several forums, where owners were surprised at how quickly the cast iron rotors needed replacement (it is a disposable item, afterall) due to stress cracks connecting holes and/or radiating out to the edges of the discs. In fact, our GT3 needed new front rotors at 4500 miles and that was almost exclusively street mileage, albeit mostly twisty canyon driving.

I hope you don't experience "early" deterioration of your steel rotors. If it's not too much trouble, please report back after you have 1000-1500 track miles on the stock setup. I do think there's a cooling issue which will affect all GT2/3 rotor longevity under extreme track conditions. I also agree that the GT cars will benefit from a 2-piece aluminum floating hat, slotted rotor setup -- less unsprung weight, better dissipation of heat and no holes to get clogged.

 

Yeah, I'll just leave it at that - I'm happy so far and they've met my expectations but wouldn't complain with something better... For the record, I don't keep track of track miles but I must be pretty close to or past the 1k mark by now. I will say that I can't emphasize enough what keeping the holes cleaned out does for performance or longevity...

 

keep track of track miles
I know this is pretty ****, but I confess to having just got a log book. Since getting the MPSC's, and needing to keep track of their heat cycling, and the arrival of my Race Tech DL1 from the UK I decided to go the whole hog. I'd been keeping a rough log of track - road miles on my original tires, so can give you an instant review.

FWIW, here is my info.

MPS2 - OEM Pads;
3,600 miles, includes 1,000 miles run in below 5K rpm, and 1,350 at the track.
(big Willow, best average 87mph)

MPSC - Pagid Yellow RS-19
420 miles, 235 at the track.
(big Willow, best average 89mph)

Car total 4,046 miles.

OEM steel rotors showing only very slight radial cracks, but they have started. Not sure if it is a linear or logarithmic deteriation from here. Brembo, Alcon, hurry up with those slotted floating disc sets for our calipers!

 

Great work, Andrew. Keep the data flowing. Once the stress cracks began showing up on our front rotors, they seemed to spread at a more exponential rate.

My friend at Brembo thinks they will have the 2-piece floating hat rotors that will work with the stock GT3 calipers by year-end -- perhaps a bit sooner.

 

Jack:

FWIW,.....I have Alcon racing slotted, full floating rotors and billet, anodized hats right now for the front of your car.

These are 360mm x 34mm and FAR more durable than the OEM stuff.

 

I ordered PCCB for street use only. No problems no regrets.

 

JMcD I agree with you when it comes to using them for street. It's just too expensive to bring to the track, unless you're in it for points and like outbraking other cars into corners. The GT3s and GT2s with PCCB would bring shock and awe with their braking!

Andy

 

I don't think PCCB were marketed by Porsche for better braking, just longer life in normal use and for weight savings over iron disks.

 

A stock GT2 or GT3 with PCCB won't brake as well as a stock turbo.

A stock turbo with Pagid Orange will stop MUCH faster than PCCB.