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Wow, my 2015 Carrera had 325 torques and 430 horses. And that was available in 2013. So 7 years later we get a 4.0 9A1 with 309 and 414? Good work, Porsche.
How do you even manage to increase displacement by 200 to essentially the same engine, and keep torque the same?
I think I’m most surprised by the weight gain. I know it’s only net 30kg but so many folks were reporting a 100kg loss six months ago. Haven’t an opinion on the new engine yet. I hope it turns out to be a reliable work horse like the 9A1 3.8.
I don't see anything that would make me want to trade up. Good that others will get a shot at owning fun damn car though. That can't ever be a bad thing.
Because the manny is torque limited as has been posted on here all along.
Exactly! The Manual gearbox is rated at 420Nm (309.78 ft-lbs) and you can clearly see from this torque curve that porsche.com posted today that they have artificially lopped off the peak torque above this spec, between 5,000 and 6,800 rpm:
Otherwise, it might be able to make around 345 ft-lbs. Even the original GT4 was torque limited to provide 309 ft-lbs rather than the 325 ft-lbs of the 991.1 Carrera S with the same motor to not exceed the gearbox's rating. Usually you only see table-top torque curves with turbocharged motors with strict boost control, never with NA motors that are run freely. I'm guessing the ECU won't allow the throttle body to open fully in that range.
Although the gearbox may be able to handle more torque (as shown by some with aftermarket motors), Porsche is probably strictly adhering to this spec so that the supplier of the gearbox has to provide replacements for failures rather than Porsche paying during the warranty period.
Exactly! The Manual gearbox is rated at 420Nm (309.78 ft-lbs) and you can clearly see from this torque curve from porsche.com that they have artificially lopped off the peak torque above this spec, between 5,000 and 6,800 rpm:
Otherwise, it might be able to make around 345 ft-lbs. Even the original GT4 was torque limited to provide 309 ft-lbs rather than the 325 ft-lbs of the 991.1 Carrera S with the same motor to not exceed the gearbox's rating.
Thanks for the helpful info.
I still think it's pathetic in two models (for which they are charging 100K), that porsche can't be bothered to develop a new gearbox so they don't have to artificially limit the torque, particularly in a new car that is significantly heavier than the original.
Really modest upgrade in the suspension, etc for which Porsche is charging another 14K compared to the original GT4. Unless they really want to do ED, I just don't see why people would care that much about the new GT4/Spyder compared to the 981 versions.
I don't think we should be in a rush to judge - superficially, limiting the torque and throwing in a manual is going to limit the performance - in essence Porsche have lifted the redline and to some degree delivered a small increase in HP at the top end over the outgoing model. However, perhaps what is more important is what is going on with regard to aero and chassis improvements.
For example look at the .2 GT3RS relative to the .2 GT3, on paper they seem similar, however when you drive them they are noticeably different something further magnified at high speed due to the aero.
The irony, for me at least is Preunger talks about motorsport and then delivers the GT4 in manual - whilst rather conspicuously and without hint of irony delivers a PDK equipped clubsport to the those that want a track car and to add insult to injury delivers the GT3 with PDK and GT3 RS with PDK as the only choice.
On a personal note I'm glad I went with the GT3 RS, however I do feel the new GT4 will be a nice upgrade on the outgoing model. Too bad the PDK version won't be available until end 2020 - lost a lot of market by doing that.
Exactly! The Manual gearbox is rated at 420Nm (309.78 ft-lbs) and you can clearly see from this torque curve from porsche.com today that they have artificially lopped off the peak torque above this spec, between 5,000 and 6,800 rpm:
Otherwise, it might be able to make around 345 ft-lbs. Even the original GT4 was torque limited to provide 309 ft-lbs rather than the 325 ft-lbs of the 991.1 Carrera S with the same motor to not exceed the gearbox's rating. Usually you only see table-top torque curves with turbocharged motors with strict boost control, never with NA motors that are run freely.
If you can keep the power climbing you can keep the torque curve flat. I need better pics of the motor but having seen the intake manifold, with tuning and exhaust upgrades you can get the flat torque curve with that motor (see below).
If you can keep the power climbing you can keep the torque curve flat. I need better pics of the motor but having seen the intake manifold, with tuning and exhaust upgrades you can get the flat torque curve with that motor (see below).
Yes, it's not unusual to have a relatively steady torque curve. But it takes electronic intervention to sharply cut-off a rising curve and create a perfectly flat plateau.
Yes, it's not unusual to have a relatively steady torque curve. But it takes electronic intervention to sharply cut-off a rising curve and create a perfectly flat plateau.
No different to the 3.8l in the previous GT4 - it had its torque peak clipped as did the 3.4l in the GTS. Likewise all the 9A2 turbos are clipped too - produces a linear response.
I think we all know how it works, if you want the big daddy you have to pay for it
I think the drive reviews and track testing will really reveal the all round performance gains.
Yes, though the original GT4 was underpriced for what it provided. An amazing deal.
And your data on 991 GT3s is incorrect as it was a 13.2 K bump in MSRP from the .1 to the .2 GT3.
Ah, you're right, poor googlefu. Still, on a % basis, it's a big step up. Positioned as a .2 GT4 this is an excellent iteration, as a NEW 718 GT4 with big price bump it's a little less exciting.
06-17-2019, 10:14 PM
