Mike in CA

With normal PDK, some slippage of the clutch is allowed so the car will crawl forward (or backward) like a normal automatic as soon as you take you foot off the brake in D (manual or auto mode) or R. It's hard to stall normal PDK because the clutch is already partially engaged and the car is moving when you give it gas. Since PDK-S doesn't have the crawl feature the clutch isn't engaged until you apply throttle. It appears you have to do this somewhat skillfully or you can stall it just like a normal MT.

paver

What's the benefit to having it operate that way?

Mike in CA

Just guessing here, but the internals of the gearbox have been lightened and redisigned; maybe eliminating this feature saved a small component and therefore some weight. Or maybe it has something to do with the paddle neutral feature. Or they were looking for a way to eliminate excess heat. Or they wanted a manual-like clutch engagement that requires more driver manipulation and hence "involvement".

Boxster Coupe GTS

Porsche 991 GT3 engine startup...

kosmo

2 things:
1. if the clutch isnt engage until throttle input, wouldnt that require MORE time?
2. wouldnt the stalling issue be a safety concern?

confused now.

kosmo

i too am guessing here but i think the stall was just a "normal" stall - cold engine, pre production model.

Buddhamonk

Damn you, stop trying to confuse me!!!

Boxster Coupe GTS

That low speed "stall" was a bit clumsy and unfortunate...



...fitting a normal "mechanical handbrake" would be a good way to mitigate such "hill start" shenanigans, given the lack of transaction creep...



...alternatively, the PDK-S gearbox could be fitted with a "clutch pedal" to allow a manual override for low speed manoeuvres and a "clutch kick" whenever the mood dictates!

kosmo

that would be something

Mike in CA

1. I'm not sure what you mean by more time unless you're talking about shift times which is completely unrelated. Gradual clutch engagement will happen only when you feather the gas for a slow start and it's no different than with a MT.
2. See (1) above. There is no "stalling issue".

The driver was trying to climb a short steep ramp with a one-of-a-kind pre-production prototype and stuff it into a tight space that had maybe an inch of clearance on each side. Be fair; hardly clumsy, and 3rd pedal or no, not easy.

I prefer a mechanical pull up handbrake too, but the electric one actually works very well in hill hold situations. You can set it to hold the car then apply throttle. A message flashes in the display and the brake will then release automatically.

CAlexio

interesting stuff...

aussie jimmy

i thought the driver was pulling both paddles to make it look like a manual..

aussie jimmy

so it doesn't creep on the starting grid for disqualification when club racing...

JCL59

Could he not just left foot brake and add throttle as needed to creep up the ramp?

The hill hold does work nicely on my mt c4s btw.. Seems unnecessary with a PDK tho

Mike in CA

He probably thought he was going to make it in one shot and didn't plan on stalling. Someone calls out something as he's climbing and he stops and then stalls. Once he did, he did left foot brake to get the engine restarted and the car moving again (note the brake lights as he's giving throttle).