TXshaggy

In the flagship 718 Spyder and 718 Cayman GT4 models, the driving mode has a characteristic that’s typical of the GT variants: it can be programmed for maximum performance using the PDK Sport button. An automatic selector lever, which echoes the design in the 911 GT3, underlines the emotionally charged GT experience. The seventh gear of the PDK has a shorter ratio in all 718 four-litre naturally aspirated engine derivatives.

In addition, the PDK versions of the 718 Spyder and 718 Cayman GT4 benefit from the enhancements made to their mechanical locking rear differential: in traction and overrun modes, this achieves locking values of 30 and 37 per cent as compared with 22 and 27 per cent with the manual transmission. This has a positive effect on the longitudinal and lateral dynamics as well as traction, and increases driving pleasure.

halfmonkey

Thanks for the visual. Interesting to note that I've always thought that the lower the gears, the tighter the spread should be. At least that's how I've always adjusted my transmission when playing Gran Turismo way back when on the PS and as you went up in gears, the more spread out they should be. It looks like the 6MT is the opposite where it's more spread out (way more) in the lower gears and tightens up as you go up in gears.

For the PDK, it's interesting to see how it's still spread out in the early gears and then tightens up between 4th and 5th and then widens up again going to 6th and 7th.

lovetoturn

Hear is the link to the transmission calculator.

https://www.blocklayer.com/rpm-gear.aspx

jmartpr

This is the first test I see of a PDK GT4....GT4 vs M2 CS vs Exige 410 Sport.....GT4 is 1 sec faster than M2 CS and almost 2 sec faster than the Lotus.

Knutsm01

Excellent find!

jmartpr

BTW....the GT4 time could have been much better. He lost traction in several sections and was pushing too hard.

mjw930

He seems to have trouble with the limits, lots of over and understeer. Not what I would call smooth by any stretch of the imagination. You watch people like Walter and Hurley track Porsche's and it's an entirely different league. Here are some other laps on the same track, and I assume the same driver, with the 6 speed. PDK is not slower.....
GT4 4.0 6SP

GTS 4.0 6SP

Archimedes

He had the same issues in the M2. Same driver, same track, probably ran multiple laps on all three cars and took the best lap of each, so it's probably a pretty good relative comparison. I'm amazed/impressed that the M2 stayed within a second of the GT4.

mjw930

That shocked me as well. Absolutely shows how on any given day the driver makes the biggest difference.

jmartpr

Yes...but the corrections he did on the GT4 are way more pronounced than on the other 2 cars.......so IMO he was over driving the GT4 a lot more.

Archimedes

Or the car was performing worse. It's the same driver, same skill level, on the same track. And those are very good times on that track, far better than the average Rennlister could ever manage. Uwe Sener often drives for Sportauto and he is a very skilled driver. Either way, they would have run multiple lap times and that would have been the best.

You're overthinking it to draw the conclusion you want.

jmartpr

Overthinking.....yeah right. The conclusion is the same and very clear. But I should have expected that reply from you......you were doing great at explaining your opinion until you had to make it personal.....

Archimedes

I'd suggest anyone trying to compare lap times and make claims about cars or transmissions, go over to fastestlaps.com, pull up Hockenheim-GP and look at the times. Christian Gebhardt turned a 1:53.9 in the manual GT4.

Archimedes

Wut? How did I make anything personal? I'm disagreeing with your interpretation of the video.

Archimedes

Same driver in the 6spd. Difference is 6/10ths of a second, or 1/2 of 1% of the lap time.