991 generation PCCBs in very wet conditions

[evilandy]

Hi all,

Wanted to do this as a poll but couldn't work out how.

This Sunday I had to drive up the M6 to Scotland in some of the most dreadful torrential rain I can remember. Driving a 991 GT3 with PCCBs. On several occasions I applied the brakes only to be greeted by almost zero response. The feeling was one of no brake grip accompanied by a sound a bit like metal on metal. After maybe 5 seconds of application they would eventually start to bite.

It was so bad that when I stopped for coffee I googled the possible problem and there are lots of discussions on PCCBs in the wet. Some claiming the problem only exists on older versions. Some denying the problem at all. Some recommending doing some test braking every now and again.

I've had similar issues when starting off after leaving the same car outside in the rain overnight. However it usually cleared up after a single test-brake to dry out the brakes. In this circumstance I think its ok to have to dry the brakes out before setting off. However on this journey the rain was continuous and heavy and the problem was persistent, maybe returning every 10 to 15 minutes. It seems impractical to test brake every 10 to 15 minutes, and what happens if there was an emergency in between drying out?

Just wondering how widespread this issue was. It seems very dangerous to me. Almost too bad for Porsche to have released the car with this fault. So wondering if I have an isolated problem or if others have had similar experiences?

FYI, I've driven hundreds of cars and I've had my license far longer than I care to remember. So I'm used to cars with old/bad breaks. However I've never experienced an issue as bad as this before.

Andy

[evilandy]

Thanks for the speedy replies.

So far I've done around 3000 miles.

I'm wondering if it could be a combination of cold weather and very wet weather. Although it wasn't THAT cold at the weekend and I've driven it in heavy rain / semi-snow storm in the past and it was fine.