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What are different brakes Porsche puts on various 911 variants and how do they compare to the brakes available and on the Caymen? Both steel and PCCB varieties?
Diameter [Size impacts wheel/tire sizes]
Pistons [Affects performance]
Master Brake & Slave Cylinders [May be required for different versions]
Finally, how interchangeable might they be? Or NOT be?
I am thinking that the Caymen PCCB's {Are they still available?} may be smaller in diameter than the other PCCB's.
Has anybody got or seen or even heard of factory PCCB's on a base Cayman???
Thanks in advance,
__________________
Transplant from Alaska => Arizona. I like it HOT!
Don'tmiss scraping my master's windshield, winter oil, winter tires, chains, pluggin' in the car over night--block water heater! and interior warmer. And having to put anti-freeze in my GAS!
On a previous thread, a member was considering a used Cayman w/ PCCB and Ken was going to buy the PCCB setup from him, but I don't think it happened. I've seen PCCB on a Cayman S at Newport Porsche, so they're out there....
The brakes on the 911 (997) are indeed different. Here is a quick comparison for you:
Code:
Cayman Cayman S Carrera Carrera S
Front 11.8" x 0.9" 12.5" x 1.1" 12.5" x 1.1" 12.99" x 1.34"
8.3 sq. in. 9.61 sq. in. 9.85 sq. in. 12.17 sq. in.
Rear 11.7" x 0.8" 11.8" x 0.9" 11.77" x 0.94" 12.99" x 1.10"
7.44 sq. in. 7.44 sq. in. 7.60 sq. in. 9.85 sq. in.
PCCB on both 987 and 997 models are identical. 13.8" x 1.3" with 17.36 sq. in. pads up front, 13.8" x 1.1" with 9.61 sq. in. pads in the rear.
When comparing the braking systems, it's important to keep in mind that these are two different cars. First, a heavier car (the 997) will make more heat and need bigger brakes.
Also, a braking system needs to be designed for the weight bias of the car. If all the weight is up front (front engine), then the front brakes will be much bigger than the rears. If all the weight is in the rear (rear engine) then the rear brakes can be very big. The 997 and 987 have different wheel bases and different weight biases. For that reason, putting the brakes from a 911 onto a Cayman would screw the brake biasing up. This would likely lead to premature rear wheel lock / skidding.
The brakes on the 911 (997) are indeed different. Here is a quick comparison for you:
Code:
Cayman Cayman S Carrera Carrera S
Front 11.8" x 0.9" 12.5" x 1.1" 12.5" x 1.1" 12.99" x 1.34"
8.3 sq. in. 9.61 sq. in. 9.85 sq. in. 12.17 sq. in.
Rear 11.7" x 0.8" 11.8" x 0.9" 11.77" x 0.94" 12.99" x 1.10"
7.44 sq. in. 7.44 sq. in. 7.60 sq. in. 9.85 sq. in.
PCCB on both 987 and 997 models are identical. 13.8" x 1.3" with 17.36 sq. in. pads up front, 13.8" x 1.1" with 9.61 sq. in. pads in the rear.
When comparing the braking systems, it's important to keep in mind that these are two different cars. First, a heavier car (the 997) will make more heat and need bigger brakes.
Also, a braking system needs to be designed for the weight bias of the car. If all the weight is up front (front engine), then the front brakes will be much bigger than the rears. If all the weight is in the rear (rear engine) then the rear brakes can be very big. The 997 and 987 have different wheel bases and different weight biases. For that reason, putting the brakes from a 911 onto a Cayman would screw the brake biasing up. This would likely lead to premature rear wheel lock / skidding.
Am I understanding correctly that ANY and ALL PCCB offered on the CaymanS and/or the 911 variants are the same?
The same sizes and all?
Or are there different sizes of PCCBs? Or any differences?
What about bolt patterns and bolt lengths? Any differences?
Herman had to do a lot of work to get GT3 brakes to fit his Cayman.
__________________
Transplant from Alaska => Arizona. I like it HOT!
Don'tmiss scraping my master's windshield, winter oil, winter tires, chains, pluggin' in the car over night--block water heater! and interior warmer. And having to put anti-freeze in my GAS!
one of my rears from when I had my exhaust installed:
There was a Turbo with PCCB near mine when I bought it, and the Turbo's brakes appeared to be larger. I could be wrong, but it looked beefer!
Actually, to me, your brakes look larger.
But that could be a function of wheel difference.
However, is that not a 997-- part number on your Cayman PCCB?
This would support all PCCB being the same between Caymen and 911 variants.
I like the SportsDesign wheels you have and that yellow calipers look great on black. Kind of accents the amber in the rear taillight assembly, the signal lights.
AGAIN: IT APPEARS THAT PCCB ARE NO LONGER OFFERED AS AN OPTION ON THE CAYMAN!!!
__________________
Transplant from Alaska => Arizona. I like it HOT!
Don'tmiss scraping my master's windshield, winter oil, winter tires, chains, pluggin' in the car over night--block water heater! and interior warmer. And having to put anti-freeze in my GAS!
Is there any difference between say a pair of Brembo brakes and the OEM Porsche brakes?
The Porsche calipers are actually made by Brembo, using Porsche's patented and proprietary design. For me, I would stick with Porsche brakes.
Brembo does sell several aftermarket kits, but really, what are you trying to accomplish? Bigger brakes won't stop your car in any less distance than the factory brakes. The only advantage is that if you go with bigger brakes, you will raise the point at which they heat soak and fade. So, are you fading your factory brakes? I didn't think so.
The primary advantage of PCCB is the fact that they are virtually fade proof. That would be great for track use where you are most likely to fade the steel brakes (you'd have to be one hell of a driver to do that). But Porsche strongly advises that PCCBs not be used on the track and they will not warranty them if they are. There have been several reports of PCCB owners destroying their rotors in as little as 2-3 track events.
The seconday advantage of PCCB is the fact that the rotors are much lighter than steel rotors. This reduces the unsprung mass at each wheel and affectively increases the resonant frequency of each leg (wheel/suspension/brakes combined). The benefit of this is better/faster recovery of traction over rough pavement.
The 997S and CaymanS versions of PCCB may be the same but the Turbo and the GT series cars have larger rotors and calipers. For instance the fronts rotors measure 14.96". The Carrera GT is another step up from there.
Differences Between Brakes
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