Question for 991 cup drivers. When downshifting, if you pull paddle to early (I.e. The system prevents downshift to avoid over rev) does the system store the downshift request and execute when able, or does it disregard the input so that you have to pull paddle again to downshift? Thanks.

 

lot of debate about this

I have never tried it because on a race weekend I'm simply not in the mood to experiment with the gearbox, and I've seen someone do it and "blackout" the gearbox requiring a reset. He was silly about it, flat out in 6th gear he pulled the downshift paddle 4 times and then started braking

On the other hand, I have asked other drivers and they said that it does carry a memory - mainly during the braking if they are too rushed with the downshifts the car "waits", the driver doesn't wait and pulls the paddle again, and winds up in 1st gear and sideways... I guess that answers your question

try it on a test day

 

Ok thanks. I won't try it during a race. I hope it "forgets" non executed downshifts. Or else I will end up sideways too. :-)

 

I know on the hollinger system on my 997 cup, I have to hit the paddle again to execute the downshift.

 

megaline is the same. if computer aborts a shift, you must pull the paddle again.

 

Thank you.

 

Isn't there a way to program (or re-program) this ?

 

A few clarifications might help here.

In the 2014 991s as originally delivered, a downshift which was rejected due to RPM limitations, was briefly "stored" and the downshift would actuate when revs came down to the target zone (probably around 8,000 or so).

I owned one of the first 2014 991s delivered to North America and I absolutely hated the fact that the car would not downshift when I commanded it to due to the electronic override. I use considerable engine braking and this technique was largely eliminated from my driving style. So first I went to PMNA and asked if I could raise the governing RPM where the electronics would take the downshift (to 9,000 or so). The answer was a resounding no. I then talked to the team about whether we could figure out how to crack the code and do it anyway. Bottom line: No. I heard that the Supercup guys hated it too (who routinely downshift well above stated redline) , so we even asked a few of them if they had figured out how to do it. Same answer.

So, I gave up and got used to twiddling my thumbs while waiting for the car to downshift. As you will too.

Separately, PMNA changed the coding on the downshift function so that the car wouldn't "store" an early downshift and automatically apply it when the revs were sufficiently reduced to meet the target. This at least prevented the car from downshifting long after you had told it to do so and in some cases from downshifting twice once you tried to force an "unauthorized" shift which wasn't executed and then attempted it a second time to no avail.

I think the Megaline arrangement adheres to the same electronic "rules", but it is both more reliable and shifts more crisply.

Hope this helps.

 

Very interesting. Assuming I don't use a lot of engine braking, can the 991 bang through quick successive downshifts? Or do you need the allow a certain amount of time in between?

 

Thanks guys. Hell as slow as I am going at WGI today it doesn't matter!!

Car is great. But too softly sprung in my opinion. Paddle shift makes my brain think I am forgetting something in brake zones. Like a video game.

 

Springs are not soft. Tire sidewall is huge. That's why you think it's soft.

Rear springs are same as 997 cup..

 

I can't imagine a manual sequential shifter "storing" your downshift request and implementing it even a fraction of a second later, as you won't be using the clutch at that time. I understand with a PDK as there is no clutch needed. What am I missing?

 

Yeah, but slow for you is like a 1:52....

 

Yes but mechanical and aero grip is higher. Bigger rear tires. More Wing.

Just feels like it needs suffer setup. I'll figure it out :-)

 

Prob not this weekend!!