Gt4 pdk here in 2 weeks.
Discussion
gtsralph said:
TDT beat you to it, Ralph. He posted that link on the previous page 
Don’t think Matt Farah has the gear speeds right either unless they have indeed changed the ratios.
Last manual did 84 in 2nd at what 7600 rpm?
The pdk in the 981 was 75 I think?
Guess both now at 8000 revs would be higher so be interesting to get gear speeds direct from Porsche. Apparently 17 seconds faster than the manual round the ring, probably down to the increased torque, better locking dif and faster changes more so than much shorter gearing. Still to find out if 7th is not just an overdrive.
I do think he’s right though, buy the manual if that’s what you really want and vice versa
Last manual did 84 in 2nd at what 7600 rpm?
The pdk in the 981 was 75 I think?
Guess both now at 8000 revs would be higher so be interesting to get gear speeds direct from Porsche. Apparently 17 seconds faster than the manual round the ring, probably down to the increased torque, better locking dif and faster changes more so than much shorter gearing. Still to find out if 7th is not just an overdrive.
I do think he’s right though, buy the manual if that’s what you really want and vice versa
17 seconds faster around the 'ring? That's a lot - got a link to that? That's how much faster the new 992 GT3 is over the 991.2 with an extra 10bhp, tricker tyres and a whole new double wishbone suspension system!
As for the increased torque of the PDK car, it's only a touch more and done to offset the drivetrain losses of the double clutch system.
As for the increased torque of the PDK car, it's only a touch more and done to offset the drivetrain losses of the double clutch system.
No link just read it in a blurb so might be pish, can’t remember how much faster the pdk GT3 was than the manual one for reference, but don’t think it had the better dif or extra torque so maybe also not a fair comparison. Sure we will hear soon, but not as much fun unless you are changing gears I guess
3 seconds is a claimed difference for the GT3 PDK vs manual in this thread:
https://www.pistonheads.com/gassing/topic.asp?h=0&...
I very much doubt it's 17 for the GT4, even though the GT3 has a manual box with ratios closer to the PDK. It'd be good to see if there's definitive data out there though!
https://www.pistonheads.com/gassing/topic.asp?h=0&...
I very much doubt it's 17 for the GT4, even though the GT3 has a manual box with ratios closer to the PDK. It'd be good to see if there's definitive data out there though!
Edited by Twinfan on Thursday 25th February 22:50
Twinfan said:
17 seconds faster around the 'ring? That's a lot - got a link to that? That's how much faster the new 992 GT3 is over the 991.2 with an extra 10bhp, tricker tyres and a whole new double wishbone suspension system!
As for the increased torque of the PDK car, it's only a touch more and done to offset the drivetrain losses of the double clutch system.
Worth pointing out that the Ring has been smoothed out and resurfaced in parts and apparantly slightly shorter since 2017 991.2 GT3 lap.As for the increased torque of the PDK car, it's only a touch more and done to offset the drivetrain losses of the double clutch system.
johnycarrera said:
No link just read it in a blurb so might be pish, can’t remember how much faster the pdk GT3 was than the manual one for reference, but don’t think it had the better dif or extra torque so maybe also not a fair comparison. Sure we will hear soon, but not as much fun unless you are changing gears I guess
PDK GT3 has e diff manual has mech diff. Engine torque is the same.Twinfan said:
17 seconds faster around the 'ring? That's a lot - got a link to that? That's how much faster the new 992 GT3 is over the 991.2 with an extra 10bhp, tricker tyres and a whole new double wishbone suspension system!
As for the increased torque of the PDK car, it's only a touch more and done to offset the drivetrain losses of the double clutch system.
The GT4 PDK has 7lb/ft extra torque over the Manual for one reason alone and its nothing to do with drivetrain losses. The PDK's 317 Torque is what the engine produces and the Manual has less because its Gearbox is strictly limited to 310. This is purely from a licencing POV as plenty have souped up GT4s to exceed this figure/As for the increased torque of the PDK car, it's only a touch more and done to offset the drivetrain losses of the double clutch system.
Taffy66 said:
The GT4 PDK has 7lb/ft extra torque over the Manual for one reason alone and its nothing to do with drivetrain losses. The PDK's 317 Torque is what the engine produces and the Manual has less because its Gearbox is strictly limited to 310. This is purely from a licencing POV as plenty have souped up GT4s to exceed this figure/
I reckon the engine could produce more than 317 in its current form, I'm pretty sure it's a parasitic losses thing just like it was on the 718 GTS with the 2.5T. I suspect they're both electronically limited in the engine mapping but at different levels.I seemed to remember some talk of PDK vs manual in another thread but I couldn't find it, so I Googled and found the press release:
https://newsroom.porsche.com/en/2020/products/pors...
With auto-blip and a good driver there's probably not a lot of difference between the manual and PDK cars in strightline speed so it would all come down to the diff differences and how much of an effect they have on handling:
https://newsroom.porsche.com/en/2020/products/pors...
Porsche said:
Compared with the 718 models with the manual transmission, the 718 Spyder and 718 Cayman GT4 now accelerate from 0-100 km/h half a second faster, in 3.9 seconds. They reach the 200 km/h mark in 13.4 seconds (0.4 seconds faster). The 718 Cayman GTS 4.0 and 718 Boxster GTS 4.0, both with 294 kW (400 PS), also improve in the standard sprint from 0-100 km/h by half a second to 4.0 seconds, and then reach the 200 km/h mark in 13.7 seconds (0.4 seconds faster compared with the manual transmission).
So launch control saves 0.5 seconds in the 0-100km/h (62mph) sprint but the manual car claws back 0.1 seconds between 100-200km/h (62-124mph) as the gap drops to 0.4 seconds.With auto-blip and a good driver there's probably not a lot of difference between the manual and PDK cars in strightline speed so it would all come down to the diff differences and how much of an effect they have on handling:
Porsche said:
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.
OP - I picked up a new car from the OPC during lockdown. The only difference was we ( Mrs and I ) were not able to drink coffee and eat the biscuits. The OPC has a dedicated handover area that just us and him were in. The car was covered and the reveal and handover no different to when I got one out of lockdown. Plenty of opportunity to look the car over, check it and drink in the new car smell !!
Congrats on the new car, looking out the window at the glorious sun and blue skies, you got it just in time
Congrats on the new car, looking out the window at the glorious sun and blue skies, you got it just in time
Twinfan said:
3 seconds is a claimed difference for the GT3 PDK vs manual in this thread:
https://www.pistonheads.com/gassing/topic.asp?h=0&...
I very much doubt it's 17 for the GT4, even though the GT3 has a manual box with ratios closer to the PDK. It'd be good to see if there's definitive data out there though!
I doubt very much there is an official lap to confirm the 17 seconds advantage for the PDK GT4 because that would mean a full lap of 7.15 which is only just over a second slower than a 991.2 GT3 PDK! The manual 718 GT4 does it in 7.32 and the 981 GT4 does it in 7.42 (I was quite surprised when I saw that the 718 was 10 seconds quicker).https://www.pistonheads.com/gassing/topic.asp?h=0&...
I very much doubt it's 17 for the GT4, even though the GT3 has a manual box with ratios closer to the PDK. It'd be good to see if there's definitive data out there though!
Edited by Twinfan on Thursday 25th February 22:50
On the other hand, I would not be at all surprised if a PDK GT4 was significantly quicker around the 'ring than a manual for the 'average driver'. Maybe that is where the 17 seconds has come from because the times above are all for pro drivers? Having owned a PDK car (Cayman R) before my GT4, I think a PDK would very likely reduce my time around Spa Francorchamps in the GT4 by at least 3 seconds (ca. 3 minute lap). Therefore it would likely reduce a lap of the 'ring (which must be about 3 x longer) by at least 9 seconds.
If I bought a 718 GT4 replacement for my 981 GT4, I would definitely go PDK. Because as David says.....PDK wins on trackdays!
Sounds like people are getting all these times mixed up with 992 GT3
718 GT4 PDK being 17secs quicker than the manual GT4 doesn't sound correct at all.
The end of gear speeds aren't even all that different - so you're just saving the shift time?
Motortrend estimated that PDK would be 7-8seconds quicker - but that sounds more like the kind of gain from an RS (which maybe should even quicker)
PDK GT4 is carrying a little more weight, and are there more transmission loss from a PDK?
https://www.motortrend.com/cars/porsche/718-cayman...
Oh, and a PDK transmission will be available in a few months for those who really want to chase lap times. The six-speed manual is fun, say the Porsche engineers, but the PDK is fast. No one will confirm it on the record, but it's whispered a PDK-equipped 718 Cayman GT4 has already lapped the Nordschleife seven to eight seconds quicker than the manual car.
Before the launch of the PDK cars I thought that they might be shorter ratios - but that not the case. Likely saving this for RS.
718 GT4 PDK being 17secs quicker than the manual GT4 doesn't sound correct at all.
The end of gear speeds aren't even all that different - so you're just saving the shift time?
Motortrend estimated that PDK would be 7-8seconds quicker - but that sounds more like the kind of gain from an RS (which maybe should even quicker)
PDK GT4 is carrying a little more weight, and are there more transmission loss from a PDK?
https://www.motortrend.com/cars/porsche/718-cayman...
Oh, and a PDK transmission will be available in a few months for those who really want to chase lap times. The six-speed manual is fun, say the Porsche engineers, but the PDK is fast. No one will confirm it on the record, but it's whispered a PDK-equipped 718 Cayman GT4 has already lapped the Nordschleife seven to eight seconds quicker than the manual car.
Before the launch of the PDK cars I thought that they might be shorter ratios - but that not the case. Likely saving this for RS.
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