I have a 2013 base 991 C2 and I was in 2nd gear in manual mode and floored it to pass a slower vehicle this morning. The PDK automatically downshifted to 1st, but quickly hit the rev limiter and bounced there for a few moments until I realized I needed to upshift back to 2nd! I do not understand why it automatically downshifts but doesn't upshift back to the gear I was in! Anyone else have this problem? I just had it in service and got all the new updates. Is this a new change? For some reason, I thought I remember it upshifting automatically at the rev limiter before - but not sure. Anyone else experience this?

 

What drive mode was it in? I think it may depend on whether or not it is in Sport or Sport Plus. I just passed 2000 miles on my car, so I haven't really driven too aggressively yet.

 

I was in sport mode (I do not have Sport plus)

 

As I understand it - and this is not from personal experience yet - it will downshift when necessary but not upshift for you unless in the auto mode. If it didn't downshift, you'd lug the engine by driving in too low a gear for your speed, or stall. Once in Sport or Sport+, it will hold your gear for you until you upshift and will downshift if you floor it and should have manually downshifted first. Somebody correct me if I'm wrong since I'm expressing what my understanding is, not actual, personal experience.

 

That has been my experience too. In manual mode it will not upshift and bounce at the limit. I am unsure if the sport button is off if that makes any difference to the auto upshifting at limit.

The first time this happened, I had no idea what was going on, and thought there was a problem, as the car is a raging beast and the tach is bouncing at the limit. I figured the PDK has adequate safety measures that it should not harm the engine when this occurs.

 

I get the same result in my tip when the gear shifter is in M.

 

+1 that's the answer, it won't do that in the "auto" mode.

 

That's exactly how it works in my M5. It only makes sense to me if you're in manual mode that you want to control when to upshift. The only reason it downshifted in the first place was to give you the necessary power for what it thinks you were trying to do... which in this case was correct because you're trying to pass the other car.

 

It's normal ..no worries.

 

In a tts so this may be different. Mine won't up shift unless the gas pedal is fully pressed down pass the pedal switch. I've hit the rev a few times when I floor it but the gas pedal isn't fully down.

 

I had it occur in my 997.2S . What happens is that it reaches the limit and there is a fuel cutoff until the car is manually shifted up . It may have felt like somewhat of a suspended mode for those few moments.

It's normal BTW .

 

Feels like you're a kid and someone unexpectedly takes your toy away.

 

Yes. it was a very strange sensation....the acceleration stopped, the engine was sputtering, and for a split second I was not sure what was happening....the worst part was it was during a very tricky pass that I had carefully timed and it happened while I was right next to the other vehicle before a corner

 

If you were in manual mode as you say, you have to pay attention to the shirting. Meaning auto shift is turned off in PDK. I always prefer driving inanual except whenI use launch control.

If you leave it in auto it will never hit rev limiter in my experience. But hard to drift and spin the wheels in auto IMO.

 

Yep Fester is perfectly right.
BTW there is also a little 'button' under the gas pedal that you only hit when you totally floor it and that, whether you are in auto or manual, acts like a good old kickdown (have not checked the manual and do not know if it is any smarter than that). I am not a fan of this on the track and would rather not have it . Sometimes you are already rather high in the rpm's, you want to floor it and do not want to jump to the limiter by downshifting for 50 yards before you have to shift up again. The PDK is so quick that it may in fact improve your time, but I do not like the car to make a decision for me when I am in manual. Hence why I am fine with the manual mode hitting the rev limiter too...