PSCB Brakes

[Yorkshirepuds]

Not only zero brake dust but zero rotor/disc rust too... probably only really matters if you're in a climate where it rains a lot and they salt the roads over winter... the discs on our previous Macan looked grim with rust if it wasn't driven for a day or so in winter, our (PSCB equipped) Taycan wheels and brakes stayed perfectly clean all last Winter with no effort.

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[daveo4EV]

‘In every respect’? What’s the difference in stopping difference between the PSCB and the standard brakes? What’s the weight saving difference?

There’s definitely an advantage from a (lack of) corrosion perspective, but in a vehicle where for 90% of the time, the physical discs are not used, it’s a lot to pay for clean wheels!

if the tires are identical the stopping distance will be identical

the vehicle's tires and their current grip-level (current road adhesion levels) is what "retards/slows" the vehicle's momentum causing deceleration g's - all Porsche brakes (and most other vehicles) can easily exceed the maximum grip of most any tire compound (certainly any road legal street tires) - so the limiting factor on stopping distance is NOT the brakes, but rather the current grip level of your tires and road conditions (and ABS characteristics) - *1 - footnote - the only way stopping distance varies by brake type is once you are in to "endurance brake fade" situations - and that requires repeated (more than 25 times see below) brake applications in a very very short (no time to cool between uses) time window - once the brakes are allowed cool you're back to maximum performance limited by current tire-grip/road-adhesion characteristics…

the grip level of your tires for current road surface conditions dictate stopping distance - not your brakes! (unless your brakes truly and honestly suck - Porsche brakes do not suck).

Porsche tests _ALL_ the braking system to pass a "no fade" test that is well beyond most any normal street driving scenario - the process is documented in this article

https://www.roadandtrack.com/new-cars/future-cars/a28915025/porsche-taycan-huge-brakes/

A spokesperson told me that every Porsche is required to pass a braking torture test: 25 stops in a row, from 80 percent of a car's top speed down to 90 km/h (56 mph), with every fifth stop involving full ABS. For a car to pass, it has to generate between 0.8 and 0.9 g of deceleration every time.

so unless you're stopping from 80% of top speed (felony speeding in North America) 25 times in a row with no rest between stops - all Porsche brakes are very resistant to "brake fade"…note the article states _ALL PORSCHE_ brakes on _ALL_ Porsche vehicles must pass this test - even the base models with base brakes. Porsche brakes do not suck.

Now the base brakes may only "just pass" this test with the 26th trial "failing" to maintain the 0.8-0.9 g requirements - but all Porsche brakes pass the same test. The PSCB's and PCCB's may vastly exceed the 25 times requirements, but all Porsche brakes pass the 80% top speed deceleration g's test. So unless you need to stop 25 times in a row with NO COOLING between trials - I think you're good with any of Porsche's choices…

blend in the FACT that 90% of your braking is handled by regeneration (not heating/testing the friction brakes) - the Taycan brake choices boil down to a mostlly an evironmental/cosmetic/pocket book affair…

so get the brakes that you can afford and match the car - I've suggested in other threads (w/data) that the Taycan doesn't need PCCB's - but they are the best brakes money can buy and look awesome and have zero brake dust - but their additional thermal capacity is un-necessary on the Taycan (even when tracking).

one of the reason to buy Porsche's is their excellent engineering - in the case of brakes - stopping distance and brake fade even for the base brakes is industry leading and overkill for any street legal scenarios - and more than sufficient even for track applications - only when discussing high-performance "endurance" scenarios would one honestly "need" one of the brake upgrades Porsche offers.

PSCB's are excellent brakes - the Taycan does 90% of it's stopping with out using the the brakes…so honestly any of Porsche's brake systems on the Taycan is "low/no dust" and excellent brakes for the vehicle. Let your personal vehicle goals, pocket book, and style choice be your guide, any of the brakes achieve excellent functionality.

footnote *1 - [this assertion is trival to prove once you note that stopping distance in the dry is different than in the rain, snow, ice, gravel, dirt - and yet the brakes are the same, the tires are the same, but distance varies - that's because maximum tire grip is what stops your vehicle - your brakes are not the limiting factor - road-adhesion is the limiting factor on maximum g's for deceleration -not base-brakes, PSCB or PCCB's since they all have vastly more max friction than your tires - tires and current grip level dominates stopping distance performance]

 

[Sidicks]

if the tires are identical the stopping distance will be identical - the only way stopping distance varies by brake type is once you are in to "endurance brake fade" situations - and that requires repeated (more than 25 times see below) brake applications in a very very short (no time to cool) time window - once the brakes are allowed cool you're back to maximum performance…

Porsche tests _ALL_ the braking system to pass a "no fade" test that is well beyond most any normal street driving scenario - the process is documented in this article

https://www.roadandtrack.com/new-cars/future-cars/a28915025/porsche-taycan-huge-brakes/


so unless you're stopping from 80% of top speed (felony speeding in North America) 25 times in a row with no rest between stops - all Porsche brakes are very resistant to "brake fade"…

so get the brakes that you can afford and match the car - I've suggested in other threads (w/data) that the Taycan doesn't need PCCB's - but they are the best brakes money can buy and look awesome and have zero brake dust - but their additional thermal capacity is un-necessary on the Taycan (even when tracking).

one of the reason to buy Porsche's is their excellent engineering - in the case of brakes - stopping distance and brake fade even for the base brakes is industry leading and overkill for any street legal scenarios - and more than sufficient even for track applications - only when discussing high-performance "endurance" scenarios would one honestly "need" one of the brake upgrades Porsche offers.

PSCB's are excellent brakes - the Taycan does 90% of it's stopping with out using the the brakes…so honestly any of Porsche's brake systems on the Taycan is "low/no dust" and excellent brakes for the vehicle. Let your personal vehicle goals, pocket book, and style choice be your guide, any of the brakes achieve excellent functionality.

Agree 100%

For the record, I had PCCBs on my GT3 and would spec them again. I just don’t see the need for PSCB or PCCB for this car.

At PEC Silverstone, they told us that all Porsche cars had to be able to stop from 60mph in under half the time it took to get to to 60mph in the first place. Repeatedly.

 

[daveo4EV]

At PEC Silverstone, they told us that all Porsche cars had to be able to stop from 60mph in under half the time it took to get to to 60mph in the first place. Repeatedly.

this! a thousand times this - _ALL_ Porsche Brakes DO NOT SUCK and vastly exceed what ever driving scenarios you can consider for road legal situations and even extra-legal situations.

you need to be tracking your vehicle (a lot) before upgrading brakes on a Porsche makes an actual functional difference - and even then the difference is endurance on track, not stopping distance.

The _ONLY_ reason to upgrade brakes on a Porsche is for "track" scenarios - and even then Porsche's excellent brakes (even the base brakes) are more than sufficient unless a few things are true:

• you are a quick driver - one of the 10 fastest at any track day
• you're going to be on track for more than 25 min at a time
• you're running super sticky tires - beyond road legal

if you are an experience track rat, plan to run track session for more than 25 minutes, and upgrading your tires beyond street tire grip levels - well then yes you should consider "upgrading" Porsche's brakes for greater braking endurance - you upgrade brakes for endurance - not stopping distance - you upgrade your tires for stopping distance improvements (and because of better tires you then upgrade the brakes because of the higher demands)…

 

[gnop1950]

The lack of brake dust alone was enough for me to get the PSCBs. That and you really don't have an option if you want the Mission-Es. I suppose you could get something similar as aftermarket, but I wanted the Mission-Es and the larger PSCBs, IMHO, look much better with the larger wheels.

They may well perform better than the standard brakes, but the difference is likely, as others have mentioned, not meaningful in normal driving or even on the track.

 

[Skilly]

You used to clean your wheels on a daily basis?

A decent coating on the wheels means that a quick spray with a pressure washer on a weekly basis is normally sufficient to keep the wheels looking like new!

I think weekly is a stretch, unless a clean car really doesn't matter (which can be the case); especially if you are using your brakes. Also, pressure washing unless you are taking the time afterwards is just exchanging brake dust for water marks. And, depending on how hard your water is, can become permanent, even with a decent ceramic finish.

 

[Sidicks]

I think weekly is a stretch, unless a clean car really doesn't matter (which can be the case); especially if you are using your brakes. Also, pressure washing unless you are taking the time afterwards is just exchanging brake dust for water marks. And, depending on how hard your water is, can become permanent, even with a decent ceramic finish.

That’s not my experience with whatever product my detailer used on my rims. It‘s even more likely with the Taycan when the physical brakes are rarely being used.

Each to their own. I would actually have considered PSCB if the discs weren’t such a shiny white/silver colour.

 

[npx]

hm. good point - not my best wording. I guess what I should have said is that in every cosmetic aspect, they're better, but in your case it seems you don't like the appearance of the disc. so to each their own - exactly.

FWIW I wasn't going to spec the PSCB on my custom order GTS simply because the car was never going to see the track, and if it ever did, I didn't want to be putting wear on the overly expensive PSCB any more than I would the (even more expensive) PCCB, and as you point out, most braking is done on regen. brake job for standard brakes is about 2000, 6500 on the PSCB, and over 15000 on the PCCB, but it's standard on the turbo I ended up buying, so I didn't get a choice

but as I said originally, if he cares about the cost and the known future maintenance cost, don't spec em' - otherwise if you like the look, get them.

 

[Archimedes]

Heavy brake dust from iron rotors won't just hose off, no matter what ceramic coating you have on your wheels. But again, on this car, the manual braking system is largely irrelevant anyway.

I had no choice, given Mission E's were a requirement for me, but I also think the PCSB rotors look killer on the car. So that, coupled with literally zero dust, is a nice bonus.

 

[DerekS]

I am very gruntled with the PSCBs. Brake dust is the bane of my existence and it just doesn't happen on this car.

 

[npx]

Heavy brake dust from iron rotors won't just hose off, no matter what ceramic coating you have on your wheels. But again, on this car, the manual braking system is largely irrelevant anyway.

I had no choice, given Mission E's were a requirement for me, but I also think the PCSB rotors look killer on the car. So that, coupled with literally zero dust, is a nice bonus.

Correct. No matter what is claimed, you'll still need some manual brushwork and wheel cleaner to get brake dust off fully. Ceramic helps make the cleaning easier, no doubt, but on a (non EV) car, that brake dust can be as hot as 1000 degrees in severe situations, and that definitely wins the fight vs coating.

 

[daveo4EV]

gruntled

word of the day winner - super fun - brought a smile to my face!

 

[darth_maul_80]

Are the disc meant to stay shiny? Mine haven’t and I’m at around 3700 miles

 

[npx]

Are the disc meant to stay shiny? Mine haven’t and I’m at around 3700 miles

Porsche had an article out about them, that the pads polish the rotors to a mirror finish within 5-10k miles.

 

[darth_maul_80]

Porsche had an article out about them, that the pads polish the rotors to a mirror finish within 5-10k miles.

Ah ha. In that case I’ll just wait

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