[BMAN]

Are you running stock calipers and rotors?

What pads?

What booster # did you put in?

One possibility is that you've got too much booster for the stock caliper and rotor which can trigger ice mode and you could be overheating your pads giving a longer pedal feel.

If you haven't already, consider a booster with less aggressive ratio. PCA Club Racing just approved 996.355.923.90 booster with 997.355.910.30 Master Cylinder.

[Croc R]

Originally Posted by BMAN

One possibility is that you've got too much booster for the stock caliper and rotor which can trigger ice mode and you could be overheating your pads giving a longer pedal feel.

If you haven't already, consider a booster with less aggressive ratio. PCA Club Racing just approved 996.355.923.90 booster with 997.355.910.30 Master Cylinder.

BMAN, how would the above advice translate for a Cayman? A few weeks ago, I was at the advanced DE in connection with the Club Race at Daytona. After being amazed at how well my brakes were working the first 2 days (because I too have had ice pedal problems in the past), I got ice pedal going into the bus stop on Sunday. This was because I was going deeper into turn 1 before braking, thus using the brakes harder. (Incidentally, I hit 155 on at least one lap before braking for turn 1.)

[BMAN]

Originally Posted by Croc R

BMAN, how would the above advice translate for a Cayman?

I can't speak to it's effectiveness but from what I understand it's the raced Caymans that started experimenting with lower ratio boosters and had success. I believe ITC has a different booster called out in their build sheet, compared to PCA, but it's basically the same concept.

Btw, the booster on my 996 Cup is also a low ratio, by design.

I think it's worth a try. Probably won't cure the problem but hopefully would settle it down.

Originally Posted by Croc R

I hit 155 on at least one lap before braking for turn 1.)

Nice! That sounds like fun.

[BikePump]

Originally Posted by BMAN

Are you running stock calipers and rotors?

What pads?

What booster # did you put in?

One possibility is that you've got too much booster for the stock caliper and rotor which can trigger ice mode and you could be overheating your pads giving a longer pedal feel.

If you haven't already, consider a booster with less aggressive ratio. PCA Club Racing just approved 996.355.923.90 booster with 997.355.910.30 Master Cylinder.

Brian
I have slotted rotors up front and pfc pass along with the stock master cylinder . I do think the soft pedal is potentially related to hear build up. The front calipers were poorly painted at some point in its past and I am guessing that they have never been rebuilt. Hoping new seals and maybe Pistons depending on their condition will have apositive impact. Likely also put a better cooling rotor up front - open to recommendations

[BikePump]

Originally Posted by BikePump

Brian
I have slotted rotors up front and pfc pass along with the stock master cylinder . I do think the soft pedal is potentially related to hear build up. The front calipers were poorly painted at some point in its past and I am guessing that they have never been rebuilt. Hoping new seals and maybe Pistons depending on their condition will have apositive impact. Likely also put a better cooling rotor up front - open to recommendations

Ohh and the brake booster is the stock unit right now

[BMAN]

Originally Posted by BikePump

I do think the soft pedal is potentially related to hear build up.

Is your pedal still soft? I thought the MC changed helped. Considering it never got above 40degrees at the last event, cooling should not have been a problem.

You might consider adding some cooling around your exhaust tips.....umm well where your tips used to be.

[BikePump]

the mc absolutely helped - got rid of the suprise "no brakes" issue. the pedal got a little softer than the rock hard one i started with but after a couple of initial bleeds (the system did get substantial air when i replaced the mc) it stayed consistent at a little soft but i want it bak at super-firm. i do know that cooling was an issue at the previous DE when it was hotter - in clean air i had no issues but when following there was softening

[blipshift]

997 GT3 MC/Booster. SRF. PFC-11. Stock C2 Drilled Rotors and Calipers. Street Tires.

Last PCAP SPM event the car ran well, no braking issues, ran a 1:26.019 on Bridgestone Potenzas.

PCAP Day one: Pedal started very firm and stayed firm until last run. A little ABS happiness but the car was stopping around 2.5ish into 1.
Day two: Pedal started slightly less firm than day before. No issues.

Following Track day 2 weeks later: Pedal retained a slightly longer throw and slightly less firm feel as from last time on track. 4-5 laps into session 1 when I had clear track and car had warmed I pushed into one hit the brakes and got some (~3/4 of full pedal) but not enough braking. Upon pumping the brake nothing happened, still had some but not full brake. Pucker-factor was high, but fortunately I was able to retain control and not hit anything. Went back in to check things over, everything looked fine, took it back out. Was mindful of previous event so I backed up my brake point to outside of 5 board. Another few laps, another brake issue. Lots more space to maneuver but never-the-less the braking was not optimal. Brought it back in for the session. ---should also point out that this was only a noted issue in 1. Although, I have a suspicion that it may have also occurred heading into 5 but most speed had already been bled off so it was a non-factor and a bit indistinguishable at the slower speed.

Talked it over with some folks in the paddock, made a phonecall, and reluctantly took it back out for the next session but this time set the brakes with left foot braking while accelerating out of 10, and kept brake point clear outside the 5 board. No issues to report with that regimen. If truly ice pedal, I think it should have occurred regardless of setting the brakes, no? To try and describe what the pedal felt like...It reminded me of ABS coming on but without actually braking.

Just picked the car up with a PIWIS flush. Pedal feels solid, good throw, ABS seems to be less chatty (as best as I can tell on the street, at least)