991.1 GT3 rotor/pad combo
11-14-2018, 07:54 PM
#16
Rennlist Member
I ran Giro's and RE10'd this year. Rotors look great and pads may make 1or 2 DE's next season. I was a Paid fanboy until the RE10's. The modulation is a cut above.
11-14-2018, 08:19 PM
#17
Race Director
Stock pads are Pagid, and it seems like lots of people got good track life out of them, so if the DS2500 don't work (no biggie, they were free), I'll try the stock pads sitting in my garage. With the bigger rotors and cooling of the GT3, I don't expect the DS2500 to fade, but we'll see. Also, without all the nannies on, it puts even less heat into the system. Maybe the stock pads are actually more track-ready than the DS2500? Hard to know since it's an OE spec Pagid, so requires actual track testing.
11-15-2018, 12:35 AM
#18
Rennlist Member
I spoke with Clark at Apex Performance and he says the DS2500 is a more aggressive pad than the stock Porsche pad. If the stock Porsche GT3 pads are in fact by Pagid that would answer a question many non-GT3 owners have as Girodisc sells a rotor where we can use the front GT3 brake pad size.
Mvez,
It's unlikely that the OEM Pagids are more track-worthy than the Ferodo DS2500. While I'm not exactly certain on the OEM compound, we've tested a couple of Pagid 'Sport' compounds on our brake dyno. What we've seen is that the DS2500 can reach considerably higher temperatures before its friction level starts to taper off. More importantly though, is how that friction/mu level tapers off. The DS2500 has a gradual decline in mu with temp increase, which provides plenty of warning if they're starting to get overheated. The lower level Pagid compounds we tested (and many, many other branded sport pads we've tested) have a much more abrupt decline in mu when they get really hot. That means a BIG surprise/pucker-factor moment when you are barreling into a brake zone...the pedal remains hard, but the car just doesn't slow down...not fun! :O
As noted, we've had several fast drivers in fast front engine cars work the DS2500 pretty hard on the track without fade. Those cars tend to be very hard on front brakes. I'm therefore doubtful you'll do so since your car is more balanced on front/rear usage. That said, you seem to be haulin' the mail, so who knows. I'm optimistic that they'll be what you're seeking, but we won't know 'til we know.
Thanks for giving them a shot in the name of science.
It's unlikely that the OEM Pagids are more track-worthy than the Ferodo DS2500. While I'm not exactly certain on the OEM compound, we've tested a couple of Pagid 'Sport' compounds on our brake dyno. What we've seen is that the DS2500 can reach considerably higher temperatures before its friction level starts to taper off. More importantly though, is how that friction/mu level tapers off. The DS2500 has a gradual decline in mu with temp increase, which provides plenty of warning if they're starting to get overheated. The lower level Pagid compounds we tested (and many, many other branded sport pads we've tested) have a much more abrupt decline in mu when they get really hot. That means a BIG surprise/pucker-factor moment when you are barreling into a brake zone...the pedal remains hard, but the car just doesn't slow down...not fun! :O
As noted, we've had several fast drivers in fast front engine cars work the DS2500 pretty hard on the track without fade. Those cars tend to be very hard on front brakes. I'm therefore doubtful you'll do so since your car is more balanced on front/rear usage. That said, you seem to be haulin' the mail, so who knows. I'm optimistic that they'll be what you're seeking, but we won't know 'til we know.
Thanks for giving them a shot in the name of science.My shop has put brake temp strips on GT3/GT4 calipers and they don't get very hot. It's very likely the reason that you can take a stock Pagid pad to the track and not fade it, as many report. My guess is if you put that same pad on a C2, or GTS, you might see some fade at the track, especially if you keep the nannies on.
I can also tell you without a shadow of a doubt, brake temps are higher on a GT3 when you leave everything on. In fact, the one session I initially forgot to turn them off, I also noticed my tire pressures shot up higher and faster, another indicator of how much the stability systems are working, most of which involves selective braking these days.
Point is, you just don't know until you try it. Thanks for stepping up, this may end up being a very good exercise that opens up another solid pad choice that many never thought was "enough" for hard-core track duty.
11-15-2018, 06:47 PM
#19
Rennlist Member
I recently upgraded my 991.1 C2S track car to a 991.1 GT3, and so far love it on the track (have been out once so far, going back out next week).
As I wear through the stock rotors/pads, I've been thinking of what good options for this car are. For my C2S, I ran Sebro slotted rotors and Pagid RS29s and while I didn't hate them, I didn't love them either. The initial bite was moderate, and the heat capacity and fade after 3 or so HPDE sessions was not great. By the end of the day, my brake distances were longer and didn't instill confidence. I tried RSL1's in front, and I tried RS19s originally.
For the GT3, the stock brakes feel almost like my RS29s did. In fact, looks like the pads are by Pagid (says so right on them) but they are not the usual yellow endurance pads. They also squeal a good bit, so makes me think the OEMs are at least more track-oriented than stock C2S pads. However, I'm looking for something with a more bit bite and consistency throughout the day. What are popular options? I've heard great things about Girodiscs + Raybestos pairings...
As I wear through the stock rotors/pads, I've been thinking of what good options for this car are. For my C2S, I ran Sebro slotted rotors and Pagid RS29s and while I didn't hate them, I didn't love them either. The initial bite was moderate, and the heat capacity and fade after 3 or so HPDE sessions was not great. By the end of the day, my brake distances were longer and didn't instill confidence. I tried RSL1's in front, and I tried RS19s originally.
For the GT3, the stock brakes feel almost like my RS29s did. In fact, looks like the pads are by Pagid (says so right on them) but they are not the usual yellow endurance pads. They also squeal a good bit, so makes me think the OEMs are at least more track-oriented than stock C2S pads. However, I'm looking for something with a more bit bite and consistency throughout the day. What are popular options? I've heard great things about Girodiscs + Raybestos pairings...
let me know if you want a copy of it and ill send it. PM me
Mark