Sobrut911

My steel rotors take a little extra time to grab when I’m driving on the highway with little or no traffic in heavy rain. It’s quite unnerving. I

Sobrut911

I forget to mention that I was referring to my Cayenne and not my 911tts . Immediately after washing it I notice a very minimal delay for the brakes to grab. I can’t comment on how they are in the rain because after 49500 miles I haven’t driven it in the rain.

sexfiend

Decided against selecting PCCB's on a daily driver 992. Too much risk with debris possibly getting lodged in wheels driving 100+ miles highway and city. Also vandalism might be an issue - parking for long times in a busy place, you don't know when some winner might try to sabotage them. Those two things are an afterthought mostly on steel rotors, but devastating for PCCB's, like you would need to be prescribed a flatbed and 10 grand to the nearest Porsche dealership stat, a really great way to start your morning commute. On top of that I seem to gather PCCB's take extra caution after it starts raining God forbid one forgets to pump them before heading on.

tcutter

Just got a new-to-me 2017 Macan Turbo w/PP. Almost learned the hard way about the wet brake problem coming out of a car wash on the second day.
Have since experienced "no brake" syndrome twice here in Chicago, once last week in the rain and this AM in the snow. Not good!

A418t81

Never happened on my 991.2 Turbo S or Touring. Both with PCCB.

Big Swole

I saw threads about this (Thank Goodness) when I first bought my 997.2TTS last year.

I'm Rarely if ever in the rain with my TTS, but at least I knew / know about what to do to fix the issue if caught in the rain.

I still love the PCCB option and would buy another one with them. Hopefully if I ever trade up, it'll be a 991 TTS.

NYGLOBAL

My 997.1TT ceramic breaks are awesome but in wet conditions they operate very differently. Car breaks equally but the difference in the peddal preasure scares the S* out of someone the first time. So be careful in the rain. In rain pedal needs to be pressed a lot harder and deeper. I do not know if it is a pads issue, calipers, sensors or all of the above but if someone had a soultion to improve rain performance I would love to hear.

Big Swole

It's about heat. When driving in rain, simply apply the brakes from time to time, even when not needed to build heat in the pad / rotors for an upcoming emergency braking.

You stay on the gas, but just drag the pads on the rotors for a few seconds periodically.

VintageCollector

I did a little search but couldn't find anything about this from Porsche. This doesn't sound like a reasonable problem to have considering the liability issues involved so I'm a little surprised they haven't commented on it.

Johnny DB

I don't really think my braking is reduced, just that the initial bite we are all used to isn't as pronounced for a split second when wet.

Dr Chill

PCCB's on 991.2 TTS worked great in wet, same brakes on 2015 Z/28 were horrific in rain.