mrsullivan

I went back and forth too in the beginning. But after a lot of reading, discussions, and soul searching, I came to the conclusion that I would always regret not getting them. I don't track my p-cars. They are toys for weekend driving in the hills outside of Austin. There are a lot of justifications on this board about why not to get them, but if someone is never going to take their car on the track, I think the only honest answer is price. They are expensive, but I didn't want to let that deter me. While the exact numbers are debatable, I think it's anywhere from 7 to 10 pounds per corner of unsprung rotating mass. Will you feel that on the street? Porsche says so. Drivers that have experienced both say so. You have to decide if you believe them. Bottom line, I say go for them. Absolute worst case, you have lost 9k. I feel that is not as bad as spending 150k and wishing you had got them. Most here disagree, but this is my perspective.

The emotional parts ---- same brakes as 918, look gorgeous with the wheels, no brake dust, won't see them everywhere, gt3 deserves lightest components, etc

jlanka

I'm a green track driver and plan on doing maybe 3 events next season which will equate to maybe 5 days. I went with PCCB based on that.

devenh

If I wasn't going to occasionally track the car, I would definitely go with PCCB's.

When I do track the car, I plan to stay comfortably within it's limits, so I'm thinking PCCB's will be okay.

Finally, there is the Racing Brake option of installing steel rotors in a PCCB car if I ever start tracking the car much harder.

Deven

LAGinz

I know there is a debate about how much weight savings there actually is because of the larger rotors on the PCCBs, And I wish Porsche would clear that up. But assuming the 7-10 per corner is correct I believe (despite what anyone may say) that you may very well be able to tell the difference---on the road. I had a c5 corvette on which I temporarily put aftermarket wheels (also unsprung weight) weighing app. 8 more lbs. per corner----and there was a clear decline in the nimbleness of handling. Obviously the GT3 is a much different car, but just sayin.......

RacingBrake

Stock PCCB:
Front: 14.8 lbs (410x36)
Rear: 13.3 lbs (390x32)

RB Iron Rotor Replacement (Proposed)
Front: 27.9 lbs (410x34)
Rear: 21.8 lbs (390x30)

Note both front and rear thickness are reduced by 2mm.

ToyGuyAZ

43lbs less rotating mass with PCCB's is an enormous difference.

mrsullivan

yes. worth noting, that is considerably more than the naysayers have indicated previously... I locked PCCB thinking the difference was more like half that number, which for me, on a GT3, is still worth it...

bigkraig

Those quoted numbers are comparing steel from the same size, stock steel is a little smaller.

Still, the front PCCB is 14.8 and stock size is 390? So assuming similar thickness its around 21.8lbs on steel fronts, or about 7lbs off each wheel on the front. If you guess about the same on the rear you're talking closer to 30lbs difference.

rockitman

which will make a tremendous difference in street racing performance.

I get the lighter weight issue of pccb vs steel. Will it make you any faster on the street or track (remember this is not a race car)...I argue no.

LAGinz

Here we go

mrsullivan

it's not all about lap times... of course, we have had this conversation before...

would you really argue that 30-40lbs of unsprung rotating mass is not something you will feel on the street in terms of ride comfort over uneven roads, handling in the twisties, etc.? we can argue about whether that is the weight savings or not... if it was 10-15lbs maybe you wouldn't even notice. but 30-40lbs? I have never tested that kind of brake weight difference back to back, and I doubt many have, so we are ALL speculating a bit... but I have driven my previous cars back to back with significantly lighter wheels after fitting them, with far less weight difference than 40lbs and the car felt more lively in terms of handling.... placebo, I know

Mech33

I'm inclined to believe 99% of that feeling is placebo, as you suggested.

rockitman

I should be more clear.
PCCB...
No corrosive Brake Dust - Good
Better Braking performance under extreme sustained braking - Good
Lighter un-sprung weight - Good

Other than the brake dust issue, I don't see a real advantage given their cost for a street car that can be used very effectively on a track. The extreme sustained braking and un-sprung weight issue would apply more readily to a dedicated race car...Not your average DE track driver and especially not for the street poser. Alas they are an option and a great money maker for Porsche. Personally I think they are cool...$10k additional cool ? Not for me. YMMV.

LAGinz

I don't think it's placebo at all. When I changed to the aftermarket wheels I'm not sure I even knew the heavier specs before hand. The car felt different and I went back and looked at the weight spec. Ditched em, back to stock, back to

ipse dixit

I just like yellow breaks.

Tired of looking at red calipers all the time.