TRAKCAR

I will buy ST rotors again next spring for my GT4RS
Real world:

991.1RS Sebring Lap times 2:12-2:16 in summer SC and TC always on.
Steel rotors with RE10 pads:
Front: Rotors 16 days pads 8 days
Rear: Rotors 60 days pads 12 days

Surface transforms
Front: Rotors refurb 16 days pads 10 days (Only tried Pagid RSL1, I think if RE10 works another couple days out of rotors and pads possibly)
Rear: Rotors refurb 20 days pads 16 days.

Refurbed them twice before I sold.
You can do the math.

More expensive then steel but much better and cheaper then PCCB.

Bill Lehman

On my 981 GT4 I got 54 days (4452 Track Miles) out of the front rotors running Ferodo DS3.11 pads. The rear rotors were never changed. I am a Tech Inspector for my local PCA club and a DE Instructor

Reedy

What prompted the refurbs? Any visible damage or measurements taken that necessitated it?

Hinz Motorsport

Also a fair argument. One small point worth mentioning is that our Cayman S is running the PFC 380 Brake kit. The 380 kit uses essentially the same brake calipers and rotors that the GT4 Clubsport uses (by the way this kit should be available to the 981 S/GTS masses in 2 months or less from PFC - we are taking pre-orders now ). The best-case vs. worst-case scenario isn't quite accurate either, but also fair. I do hope folks understand this wasn't meant to be taken as fact or any type of claim for that matter. There are enough false claims being floated by sponsors in here that I do everything I can to avoid contributing to that. However, from what I have heard and the feedback I am getting so far, it does sound like these rotors are lasting a long time. Will ST rotors actually be cheaper than iron? Perhaps for some, they will be. The point is really to suggest that I believe the gap has shrunk to the point where running Carbon Ceramic discs isn't entirely a non-economical alternative to iron. Now if we want to compare to OE PCCB rotors, STs are the clear better option from a performance, cost, and longevity standpoint.

Feedback like this is exactly what this conversation needs, so thank you for that.

• Might I ask, did you get the same amount of track days from refurb 1 to refurb 2 as you did from new to refurb 1 (16 days)? Curious to see how the refurbishment degradation claims stack up.
• Also, how ragged were they when you sent them in for the first refurb?

85Gold

Also remember TRAKCAR drives "Flat Out"

Peter

Rupert16

Interesting chat about the oversized pads from Hawk, I was looking at there ceramic’s for my new 2022 718 Spyder.
I’m pretty confident that with some careful filing of the problem overhang, one could successfully bevel the mitigating edge away.
This would involve no cutting, but just a little finesse.
cheers,

TRAKCAR

That’s a big advantage, with PCCB you need to remove the disc and apply voodoo with special equipment. With ST you can see it, feel it with your nail (rough) and I waited too long once and it starts feeling like material transfer.

also, the numbers I gave are the worst you can possibly do with a 991RS. Sebring is the worst track I’ve ever been to for brakes. It’s hard and the layout is a brake killer. My lap time is respectable for an amateur and a lot of the time is found under max braking at Sebring.

bedding is important!

Most DE drivers will do much much better. Since 2020 I’ve only driven the Nurburgring and it’s very very easy on brakes by comparison.

TRAKCAR

same performance after refurb.

One of the refurb I overdid the front rotors and once the rears. Meaning I ran them so long I had brake shudder like material transfer. I actually ran them a little longer, I should have refurbed earlier, at the days use I referred to.

I would say may numbers are as bad as you can possible achieve, another track and 3 secs a lap slower and the rotors life could double..

TRAKCAR

That was before we build back bleaker.. only been to the Ring the last two years. Leaving Sunday again, come with :-)

Klepper

Impressive!

Reedy

The variance between tracks is a very real thing. I have a few tracks that I drive regularly and the difference in brake wear between them is very noticeable. Then you take your car to Bathurst and learn a whole new lesson on how hard a car can be on brakes.

Also noting the difference between a 991RS and GT4, the extra power of the GT3 means it's carrying higher speeds into braking zones so GT4 owners should get better life out of them as well.

JCviggen

I'm there 24th + 25th just in case you'd still be around by then. 25th is a private trackday however.

TRAKCAR

I’m there every day the track is open 19-31 signed up for speed club 22nd and schnelleschwaben 25th. All Apex rental cars I’m not tracking mine much.

JCviggen

Cool. I'm also on the schnelle schwaben on the 25th and probably will do a few laps on Sun 24 if it's not too hectic out on track. Happy to chat and maybe go for a lap

Hinz Motorsport

Peter, thanks a ton for all of your feedback. What compounds have you all tried with the ST rotors?