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How much brake wear do you get on track days?

JezKaye

JezKaye

PCGB Member
Member
I'm really interested to know what sort of brake wear people get on track days. I have a 991.1 C2s and in the last couple of years have averaged 8 track days per year and about 10k road miles per year. My experience is that the front stock brakes last about 4 track days and rears about 8 days. Even after one track day the pedal has a bit more sponge than perfect. On recommendation of RPM Technik who know me quite well, I've just ordered a set of Girodisc rotors and Pagid RS29's. They should last longer and offer better performance. Don't need to put them on the car just yet but not sure when, so thought best to have them on their shelf ready to fit when required. Any views?
 
I've been trying to work out how much I got out of my first set of rotors Jeremy, and I think it was about 20k miles and 6 track days. So possibly in line with your experience? Mine is a 991.2 Carrera S.

I'm running Pagid RSL29s now (I think the RSL is what used to be called the RS) after finding the replacement rotors + pads a bit crap on track. The originals would last half hour without problem, but the brake pedal was going squidgy after 20 minutes with the replacements. The 29s have a great bite, even if they're quite noisy in normal road driving.

Cadwell with MSV next month, then Donington with the club in August. Should be good tests for the suspension and pads :)

I'll be interested in hearing about your Girodisc experience.

Cheers,

--Mark
 
Interesting Mark. I spent the day at Castle Combe yesterday, had no problem with the stock brakes even in that heat, which is my second day on these discs and pads. So the Girodisc/Pagid set up will sit in the cupboard for a bit longer.

Castle Combe was a bit of an adventure, loads of racing drivers turning up for some practice before the season re starts. My car looked like it was dressed for a black tie dinner whilst everyone else was dressed for battle. Car did me proud though, being faster than many even with my skill deficit!

Wish I had a racing seat though, my gluts ache today!!


 
All you ever hear about Porsche stock brakes are they're the best in the business. And from the factory that was my experience with my 911 too. But the replacements just weren't the same, I don't know why when they were OEM fitted by my local Porsche Centre.

I've still got the same discs, just with the Pagid pads. Cadwell will be interesting in a couple of weeks time. The Cup2s are going back on as well. Those tyres are utterly amazing …

Sounds like you had a fab outing yesterday! The 911 really is an astonishing machine, isn't it?
 
mphillips said:
I've been trying to work out how much I got out of my first set of rotors Jeremy, and I think it was about 20k miles and 6 track days. So possibly in line with your experience? Mine is a 991.2 Carrera S.

I'm running Pagid RSL29s now (I think the RSL is what used to be called the RS) after finding the replacement rotors + pads a bit crap on track. The originals would last half hour without problem, but the brake pedal was going squidgy after 20 minutes with the replacements. The 29s have a great bite, even if they're quite noisy in normal road driving.

Cadwell with MSV next month, then Donington with the club in August. Should be good tests for the suspension and pads :)

I'll be interested in hearing about your Girodisc experience.

Cheers,

--Mark
Click to expand...


For what it is worth, I fitted larger 991.1 front disc/calipers to my PDK Cayman together with fitting tuned 3.8L engine. I started with OEM pads and the first set lasted 5 months, 2.6k miles and 7 track days. With some more touring in the mix, I got 4k to 5k miles out of discs and pads. I then fitted Ferodo DS1.11 then DS2500 pads and disk wear went up.

I never had to replace OEM drilled discs because of wear (e.g. below minimum thickness), they were always replaced because of cracking. I have to confess I was more conservative than many but the car did 54 track days in a little over 5 years and I always cleaned out the drilled holes after each track day.

The best and final combination was slotted Girodisc front (350mm) and rear (325mm) with DS2500 pads which were fitted for the last 4k miles I ran the car which included 6 track days. Pad wear was low (again measured after each track day) and the discs looked new with no measurable wear.







 
That is really interesting Ralph! Thanks for sharing.

Cleaning out the disc holes … as simple as pointing the jet washer at it, or did you have a better process?

 
I once had the discs cleaned mid-day on a Silverstone GP event as the holes looked like they needed cleaning out so I had Matt at Fearnsport use his jet wash. The holes looked clearer but when I got home there was harder than normal deposits in the holes. I should add don’t do it with very hot discs and it will need pads and discs pads drying out.

I would strongly recommend cleaning them out by hand, I used a suitable diameter machine screw and could do it wheels on (need to rotate to expose area hidden by calliper) or wheels off (opportunity to inspect pads, clean/detail callipers, brake lines etc).

I carry this to check pad depth (best to let brakes cool before use!)

513n-WAAs-CIL-AC-UL320.jpg

 
Many thanks Ralph, sounds like the girodiscs are a good decision and will definitely be on my car by the PCGB track days later in the year.
 
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