daveo4EV
Well-Known Member
- First Name
- David
- Joined
- Jan 28, 2019
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- Santa Cruz
- Vehicles
- Cayenne Hybrid, 911(s) GT3/Convertable
the brakes can't slow the vehicle any faster than the grip level of your tires - period full stop - PCCB's vs. PCSB vs. Steel does not change your tire's grip/traction level. If you want to improve your Taycan's stopping distance purchase stickier tires - slicks would make your Taycan stop much faster
also keep in mind - ABS will be a factor and ABS "releases" the brakes just before the tires "lock up" - this is the grip threshold of the tires (maximum grip and therefore maximum deceleration possible) and steel brakes on the Taycan can reach ABS thresholds when slowing the Taycan.
if your brakes are cool and unstressed there is virtually no stopping distance between different rotor types - the stopping distance is a function of effective traction/grip of your tires and the maximum g's they can sustain during heavy braking…ultimately stopping distance will be based on:
for street driving there is no meaningful difference in stopping distance - as the tires/ABS/road-conditions/driver are the dominate factors.
car review have investigated this factor for several years - there is no statistically significant difference in stopping distance for different rotor material types - I welcome any date/evidence/articles that show a statistically significant difference in stopping distance for any vehicle with out also changing the tires.
the ONLY advantages PCCB's offer are:
my assertion for PCCB's and the Taycan is as follows
also keep in mind - ABS will be a factor and ABS "releases" the brakes just before the tires "lock up" - this is the grip threshold of the tires (maximum grip and therefore maximum deceleration possible) and steel brakes on the Taycan can reach ABS thresholds when slowing the Taycan.
if your brakes are cool and unstressed there is virtually no stopping distance between different rotor types - the stopping distance is a function of effective traction/grip of your tires and the maximum g's they can sustain during heavy braking…ultimately stopping distance will be based on:
- vehicle speed
- road conditions
- tire grip
- ABS factors
- driver reaction time
for street driving there is no meaningful difference in stopping distance - as the tires/ABS/road-conditions/driver are the dominate factors.
car review have investigated this factor for several years - there is no statistically significant difference in stopping distance for different rotor material types - I welcome any date/evidence/articles that show a statistically significant difference in stopping distance for any vehicle with out also changing the tires.
the ONLY advantages PCCB's offer are:
- lower weight
- no brake dust
- better thermal characteristics under high stress repeated use cases (track duty)
- street driving is very very very unlikely to ever experience ANY brake fade with steel rotors - brake fade threshold after repeated use _IS_ where PCCB's will be superior to Steel brakes.
there will be no difference in stopping distance for street use in a panic stop situation - your reaction time (or lack of reaction time) and road conditions and tire condition will be the dominate factor _NOT_ your brake rotor material.…Porsche engineers have said that as much as 90% of the Taycan's braking will, on average, be achieved through regenerative braking…
my assertion for PCCB's and the Taycan is as follows
- slightly lighter
- no brake dust
- 90% regen also means less brake dust however
- cosmetic/vanity
- no effective braking difference in vehicle performance unless your tracking the taycan
- but the Taycan's battery is too small (and thermally limited) to run the Taycan long enough during hot laps to really get to the point to where PCCB's would be an advantage over steel brakes
- in the 12-15 minutes you can push a Taycan for hot laps - steels rotors won't have any significant fade either - cause Porsche's steel brakes are soooo good.
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