RideZX6R

And will it clear up the delay between hitting the paddle and shifting?

Higgs Boson

HPT can make lots of changes to the A8, the only thing that's missing is altering shift pressures and altering very specific "customized" torque management tables but there is access to turn TM on and off for certain situations.

We don't really know if the A8 uses the same logic as the A6 so I wouldn't sweat that too much.

The paddle command to shift actuation delay is, and has been, inherent in all non-DCT cars since forever. It will never click to the next gear like the paddle is mechanically connected to the transmission. Even DCT cars have a slight delay.

RideZX6R

I felt like this would be the answer... It's really the only disappointing thing about the A8 if you ask me... But it's VERY disappointing. Mainly because it's all controlled via a processor... So it's something that *could* be improved.

Higgs Boson

I think it's because it's not a direct connection, processed or not, it goes through the CAN system and is subject to all the torque calculations as everything else.

RideZX6R

My understanding is the PDK, DCT, DSG, all go thru the CAN system too... And I wish it was that fast.

I'll probably end up with a 7MT instead because of this (which, to be fair, is NOT that bad haha)

5thGear

For us who track the A8, the delay is the least of our problems. Biggest issue is overheating. Once the transmission temperature gets to 240F + on the track the delay becomes larger and shifts become anything but smooth. Once the transmission gets above 270F then the car goes into limp mode.
I would go with manual transmission if you are planning to use the C7 for performance driving.

T/A KID

I tuned my trans the 3rd day hp tuners had access to some of the tables, there's still not a lot to change, but there are some valuable tables.

My paddle mode is basically instant though, maybe a 100 to 150 rpm lead time. ( I don't recall stock, hasn't been that way in a long time)

PRE-Z06

I thought it was because it doesn't preselect the next gear like a dual clutch transmission, being it's still an automatic with torque converter?

Higgs Boson

That's a contributing factor to slow responses to shift commands, true. The paddle disconnect is not unique to the Vette however. We talked a lot about the drawbacks to the TC a year or so ago. Good times.