orthojoe

Agree. I do wonder if this has anything to do with torque vectoring, in which case esc off wouldn't cancel this either

Eric5280

When I run with esc off, there is no brake input shown on data aside from my foot. I thought it did cancel, but maybe it is one layer deeper.

orthojoe

I'm pretty sure torque vector is always on regardless

Eric5280

You may be right. I know this is the 718, but should be the same. From this, it sounds like the PTV helps on turn in at slower speeds, but not higher, nor acceleration.

"The optionally available PTV for the new 718 Cayman significantly increases agility and steering precision at low and medium vehicle speeds. At high speeds and under acceleration out of corners, the mechanically controlled rear differential lock also provides greater driving stability and traction. Watch this video to understand how this system works."

Alan C.

My guess is there would be some price to pay in rear rotor wear with everything on. A little pricey with PCCBs but cheaper than hitting a wall.

orthojoe

At least on my GT3 and GT4, the rear pads wear at a rate 2-3 times slower. The rear rotors on the GT3 still look like new after 30 track days.

Alan C.

I had the same experience with my GT3. Not enough time on the GT4 to make a judgement.
Thanks for the input.

orthojoe

True, but given that both cars have torque vectoring, and my friends' Cayman GTS with torque vectoring didn't have any abnormal rear rotor/pad wear, I predict it will be the same.
You never know, though. My buddy's 997TTS eats rear brakes and rotors like mad.

NMM991

I always run my GT3 with TC and ESC on and will do so with the GT4 when it arrives. In my case, I been into the nannies a few times when I needed them and they really do work -- good to hear that they may even get you through a track with coolant on it.

I asked the lead instructor at the Porsche Driving School this winter during a Master Course at Barber what his recommendation was -- his answer was interesting, "with prior systems (996 and 997s) we always turned them off because we could go faster, but with the 991 cars we leave them on because they don't slow us down."

I think the only times I've felt the nannies slow me down was when I needed to be slowed down! Once I turned them off on an AutoX in heavy rain and went off the course, fortunately at a slow speed where there was plenty of grass.

myBailey07

FYI, I just finished my 2nd set of PFC 11's in front and 1st rear set, for almost a perfect 1:2 ratio. Most of that with dsc on and at COTA, which is very hard on brakes.

orthojoe

Sounds right!

orthojoe

Took the wheels off and took a look at tread wear. There is still outer edge wear and tapering of the middle tread, even with DSC. Perhaps not as bad, but still there and not enough to cure the problem. I had the tires flipped inside to outside in the hopes of getting more life out of them. After this set, I think I'll have to try stiffer springs to get the even wear I'm looking for.

Yargk

Thanks for the data. I think I'll still do a few track days on the stock springs, but this information is a another little nudge to switch to swift after my first set of front tires.

Eric5280

Agree on springs, I keep saying I won't mod the car, then I mod it. DSC added stability but not enough to even wear. Btw, what aero settings are you using? I have full and never tried anything but.

ExMB

OK, we know the tires are cheaper than the OEMS. But what about the heat cycles. Is it worth it to spend $1000s on mods if the tires HC out first regardless of the wear pattern?