CCBs (lack of) performance in the rain

[fun2drv]

Took a trip this weekend from OH to TN. The way down was a pretty awesome drive with hardly any traffic that gave me the opportunity to stretch the car legs a little.

Totally different story on the way back today. It was raining all the way and found out that the CCB brakes are pretty useless in the rain. The first time that I hit the brakes, the car kept going straight like nothing was going on. It took a long time for the brakes to warm up and then bite. After that, I had to be on top of them and leaving plenty of space between my car and the car in front of me.

The brakes have been flawless in the dry so far.

[TheIceStormOf06]

This has been covered several times and also mentioned in interviews with the previous M-boss. The stopping power is reduced significantly in the F8X CCBs in the wet. It's par for the course.

In fact this is probably more of a characteristic of CCB in general and not exclusive to the F8Xs. But others xa chime in on that.

[specracer]

Absolutely

Originally Posted by TheIceStormOf06

In fact this is probably more of a characteristic of CCB in general and not exclusive to the F8Xs.

[captainaudio]

So for $8,000 you can get brakes that don't stop in the rain.

Sounds like a good deal to me.

CA

[DandyKing]

Tires dont help either. They are practically slicks and in rain are super squirrely.

[MWcoupe]

Experience the same when my car was new. Can anyone chime in that after good bedding and broken in. It's much better?

[afadeev]

Originally Posted by DandyKing

Tires dont help either. They are practically slicks and in rain are super squirrely.

I beg to differ - Micheline PSS's are fantastic in the rain.
Even in near freezing temps.

That is based on first hand experience of ED pickup and driving in the rain at autobahn speeds, as well as local NY/NJ driving recently.

You can, and will, exceed rear tires' traction with enthusiastic application of the gas pedal, but that is hardly tires fault !

a

[X2Board]

Originally Posted by DandyKing

Tires dont help either. They are practically slicks and in rain are super squirrely.

Maybe, you just need to slow down?

The PSS's are really good in the wet, not so much in the cold.

[nene]

That is sad to hear OP, but I bet many folks who get them are aware of it. I know that my sales person went over the pros/cons of the CCBs when I was on the fence about them.
Honestly I think the worst is yet to come though... when it comes time to replace them (new pads and rotors).
But you made it back safe and sound, and that is what's important in the end.

[AM4ZING]

Originally Posted by captainaudio

So for $8,000 you can get brakes that don't stop in the rain.

Sounds like a good deal to me.

CA

GOOD THING IT DOESNT RAIN IN CALI!! HAHA

Cant wait for my CCB's

[gblansten]

Originally Posted by afadeev

I beg to differ - Micheline PSS's are fantastic in the rain.
Even in near freezing temps.

That is based on first hand experience of ED pickup and driving in the rain at autobahn speeds, as well as local NY/NJ driving recently.

You can, and will, exceed rear tires' traction with enthusiastic application of the gas pedal, but that is hardly tires fault !

a

[Vectors2final]

Still doesn't mean they aren't outside their optimal operating temp. That's 40° IIRC...

[IB M]

Imho select CCB for track car or show car so no regular need to drive in the rain. If you do get stuck out then downshift to engine brake, apply pre pressure to dry early and leave more distance for safety.

Standard brakes best for a daily driver.

[48Laws]

And BMW wants no parts of those brakes for warranty issues. I hear the repair costs are mind blowing. They're beautiful though.

[kinimod]

The pads on the standard iron brakes, however, produce infinite amount of brake dust. Forget ever having clean wheels with iron brakes on this car.

[Kevlar]

Ceramic Brake rotors

p/n 34112284805 $4143.04
p/n 34112284806 $4143.04

Brake Pads

p/n 34112284970 $529

[Vigilant]

Originally Posted by DandyKing

Tires dont help either. They are practically slicks and in rain are super squirrely.

PSS work very well in rain and wet environment. Subtropical climate here in Fl has tested the limits of these tires. Cold temps are a different story...below 40 degrees, the Michelins get a little loose.

[//Maniac]

Originally Posted by afadeev

I beg to differ - Micheline PSS's are fantastic in the rain.
Even in near freezing temps.

That is based on first hand experience of ED pickup and driving in the rain at autobahn speeds, as well as local NY/NJ driving recently.

You can, and will, exceed rear tires' traction with enthusiastic application of the gas pedal, but that is hardly tires fault !

a

i don't know who you are kidding but in cold temps these tires should be kept inside. i put nearly 5k miles on my car since November and have been out in ice, freezing rain, and snow. not meant for any of those. unfortunately snows were unavailable this time of year. PSS are incredible in about 60 degree and up weather.

[absoluteis350]

Originally Posted by Kevlar

Ceramic Brake rotors

p/n 34112284805 $4143.04
p/n 34112284806 $4143.04

Brake Pads

p/n 34112284970 $529

Rotors will apparently last the life of the car under normal use so who the hell cares? Unless you mess them up by direct impact or something the cost is not an issue

Originally Posted by 48Laws

And BMW wants no parts of those brakes for warranty issues. I hear the repair costs are mind blowing. They're beautiful though.

Apparently, as has already been discussed here, they removed the warranty exclusions and BMW service program exclusions for CCBs after the M3/4 came out. You can take a look. The exclusions are gone, so ya they are covered.. You probably, however, void that if you track the car. They got rid of the exclusions likely because of the extended life of the components under normal use. So it makes sense not to antagonize potential customers over something that will rarely if ever happen.

[48Laws]

We're can I find this?

[04RC51]

Originally Posted by //Maniac

i don't know who you are kidding but in cold temps these tires should be kept inside. i put nearly 5k miles on my car since November and have been out in ice, freezing rain, and snow. not meant for any of those. unfortunately snows were unavailable this time of year. PSS are incredible in about 60 degree and up weather.

Truth! Those tires are HORRIBLE in anything lower than 45 degrees and aren't roadworthy at all.

[guarnibl]

Originally Posted by TheIceStormOf06

This has been covered several times and also mentioned in interviews with the previous M-boss. The stopping power is reduced significantly in the F8X CCBs in the wet. It's par for the course.

In fact this is probably more of a characteristic of CCB in general and not exclusive to the F8Xs. But others xa chime in on that.

My Turbo S does not have this issue. I have driven in the rain many times (got stuck in quite the storm a few weeks ago) and never had any reduced braking power on my vehicle in what's considered to be normal operation. Perhaps I'm lucky? Then again, pretty sure the rotors are $20k to replace (M3/4's are ~$8k)... so maybe there's a difference. But I kind of doubt it's a huge one (Porsche tax).

With that said, I did notice that initial bite was reduced until the brakes were warmer (after sitting for a few days and it was in the ~35 F range outside). That being said, in the numerous times I've been in the rain the outside temperature wasn't terribly cold. Could have also been the case on regular P car brakes. I've not had a lot of driving time on a Porsche that was sans PCCB.

If I do end up buying the M4, I'll probably still get the CCB's. It doesn't rain too terribly often here, and as long as it isn't downright dangerous for places where I go that it does rain, I'll be happier without brake dust and a longer mileage rotor.