[LittleBlueGT]

I am looking at the German configurator, and it looks like the new 4.0 gets better brakes:

• standard S brakes (which is also the old 2.5 GTS AFAIK): 4-piston monobloc aluminium fixed caliper brakes front and rear, discs internally vented and cross-drilled, disc diameter (front/rear): 330 mm/ 299 mm
• GTS 4.0 brakes on German site: 6-Kolben-Aluminium-Monobloc-Festsattelbremsen vorn und 4-Kolben-Aluminium-Monobloc-Festsattelbremsen hinten, Verbund-Bremsscheiben mit Bremstöpfen aus Aluminium mit Durchmesser 350 mm vorn und 330 mm hinten, innenbelüftet und gelocht, Bremssättel rot
• and for comparison, GT4/Spider brakes:
  6-piston aluminum monobloc fixed-caliper brakes at the front and 4-piston aluminum monobloc fixed-caliper brakes at the rear, composite brake discs with aluminum brake chambers, diameter of 380 mm

I'm pretty sure they are 992 C2 brakes (although sometimes Porsche uses different width rotors, so they might not be identical):
6-piston aluminium monobloc fixed brake calipers at front, 4-piston aluminium monobloc fixed brake calipers at rear, (350mm f / 330mm r) red brake calipers

 

[Semitone]

I don't know if any GTS owner will really care. I thought the big honking brakes on the 718S vs the 981S where a big upgrade for heat dissipation even though I think they had the same rated stopping distance. Very few fanboys cared. Details aren't what many Porsche owners really care about.

It's a 911....WOW!
It's a classic Porsche 6 cylinder....WOW!
It's the nicest silver color ever made...WOW!
The calipers are yellow...WOW!

Don't confuse people with subtle details.

EDIT: So I just noticed you posted on another forum and the first response was about brake dust...So there you have it, Porsche owners care more about brake dust than stopping distance and heat dissipation.

 

[aklepikov]

In fact for 718 stock brakes are good enough for everything. For racetrack you just need to change stock pads to sport or race pads and this is enough. Sorry, but it really makes to sense to change it.

 

[AVM]

So there you have it, Porsche owners care more about brake dust than stopping distance and heat dissipation.

Haha . . . great point!

When I do wash my car - which is borders 'neverland' - the thing that drives me absolutely insane is the brake dust that immediately accumulates. Honestly, more than anything, it is the 'rust dust.' Before I even get my car dried off the rotors have a coat of rust. With the first pump of the brakes the rust dust is everywhere. In fact, with the rainy winter months upon us down south, my wheels and tires demonstrate a constant (and growing) orange hue from all the rust dust.

OK, apologies for the digression . . . .

AVM

 

[LittleBlueGT]

In fact for 718 stock brakes are good enough for everything. For racetrack you just need to change stock pads to sport or race pads and this is enough. Sorry, but it really makes to sense to change it.

I disagree. It depends on the track, and a number of other variables. What happens if you put on wider more aggressive rubber? The GT4 has 380mm brakes.

I’m sure track pads will still be in their heat range on the normal S or GTS(2.5) brakes, but a larger heat-sink also means longer pad life.

 

[don]

The Girodisc upgrade is 2 piece 350mm f / 330mm r. I'll be surprised if the GTS 4.0 has 2 piece rotors so you will ultimately be wanting to get rid of them anyway if you are want to reach the limit of your braking.

As mentioned above the current 4 piston calipers and pads are quite large relative to the older 981 brakes so I'm not sure if the 6 piston adds a lot given the surface and piston area remains largely the same. Certainly the slightly larger rotor will help.

Plenty of people tracking with the 4 piston calipers, race pads/fluid and the lager or smaller rotors.

IMO, for most people the stock brakes are fine.

Nevertheless if the 4.0 does come with 6 piston front calipers then it is a nice aesthetic upgrade and improved performance in some situations.

 

[ians]

The only think that the GTS 4.0 is bugging me is the bigger brake! Yes, I know it is more for aesthetic reason! But our 330/300 rotors looks so small behind the 20" wheels! Even a Civic has a bigger brake!

 

[sobiloff]

The only think that the GTS 4.0 is bugging me is the bigger brake! Yes, I know it is more for aesthetic reason! But our 330/300 rotors looks so small behind the 20" wheels! Even a Civic has a bigger brake!

I don’t mind—it lets me fit 18” rims and dedicated track tires more easily. (Although I’m really eying the Essex / AP Racing calipers and rotors if I decide to keep the GTS instead of going for a GT4 w/ PDK.)

 

[ians]

I don’t mind—it lets me fit 18” rims and dedicated track tires more easily. (Although I’m really eying the Essex / AP Racing calipers and rotors if I decide to keep the GTS instead of going for a GT4 w/ PDK.)

The bigger 350/330 rotors still able to fit 18" for sure. A lot of Civic type R fit with 18" rims and I can fit 18" winter on my Audi that with 365/330 rotors too

 

[sobiloff]

The bigger 350/330 rotors still able to fit 18" for sure. A lot of Civic type R fit with 18" rims and I can fit 18" winter on my Audi that with 365/330 rotors too

Yeah, I should have been clearer: Apex confirmed that the 18" SM-10 wheels I bought will fit over the Essex big brake kit, including the 6-pot calipers that aren't even listed on their fitment guide. 718 Wheel & Tire Fitment Guide

 

[Yamino]

Honestly, our stock brakes are fine with a more dedicated track pads and fluids for HPDE events and regular booting around town. Once the shitty stock rotors are worn, just upgrade to Girodiscs if you want a set of bigger rotors at 350mm F and 325mm R.

 

[zagaone]

The rear brake does not have enough heat sink/dissipation capacity for any serious track usage, even with race pads, the best racing fluid and bigger 325mm x 20mm rear Girodisc. Brake pedal will get incrementally softer, lap after lap. Fronts are ok. At minimum a lot more air flow for heat dissipation is needed to the rear rotors. I decided to go all in with 350 x 30mm rear Girodisc, 996 turbo rear calipers(needed because of the thicker rear rotor, 30mm vs 20mm) and added 3” air hoses front and rear to increase air flow and dissipate heat away. Daily usage even light track usage is ok but not serious hard track usage. Just my experience.

 

[TGP2019]

Carbon ceramic option from Porsche is expensive solves all these problems with a factory warranty.

 

[TK718]

The rear brake does not have enough heat sink/dissipation capacity for any serious track usage, even with race pads, the best racing fluid and bigger 325mm x 20mm rear Girodisc. Brake pedal will get incrementally softer, lap after lap. Fronts are ok. At minimum a lot more air flow for heat dissipation is needed to the rear rotors. I decided to go all in with 350 x 30mm rear Girodisc, 996 turbo rear calipers(needed because of the thicker rear rotor, 30mm vs 20mm) and added 3” air hoses front and rear to increase air flow and dissipate heat away. Daily usage even light track usage is ok but not serious hard track usage. Just my experience.

What pads have you used? Not doubting your experience, just pulling information as I plan for track days. I've not yet had a race or track car where HT-10s couldn't stand up to all-day track use, but my local tracks only 1-2 multi-gear braking zones each.

 

[zagaone]

Pagid RSL-1 front and RSL-29 rears with Castrol SRF brake fluid. Have used Pagids and Castrol SRF for decades without issues. I believe it is not the racing pads or fluid. To me is a heat absorption/dissipation issue.

 

[TK718]

Pagid RSL-1 front and RSL-29 rears with Castrol SRF brake fluid. Have used Pagids and Castrol SRF for decades without issues. I believe it is not the racing pads or fluid. To me is a heat absorption/dissipation issue.

Selfishly, I'm relieved, as I have far less power, and the option for higher temp pads.

...But I seem to recall you have moved to monster rotors and pads sizes, and I've got the smallest of the series.

Thanks for the info!

 

[zagaone]

When I experienced the soft pedal the car was at the stock power tune (365hp) and with the stock calipers but bigger rotors 325mm vs 299mm stock. If I were you I would at least change pads, brake fluid and would seriously consider some kind of additional ventilation (air hose) to the rear brakes. Cars with Porsche vectoring are more prone to overheated rear brakes under serious track usage.