CloseNov 17, 2017 2:44:40 PM
Would be a pretty high state of tune in comparison - the last 3.4 NA topped out at what? 350hp? You'd probably need some expensive component upgrades to get the power that high.. The same thought crossed my mind though - a NA variant of that engine..
2015 911 GT3, 1964 Type 1 
Nov 17, 2017 2:48:32 PM
Nov 17, 2017 2:55:01 PM
Nov 17, 2017 3:09:55 PM
As far as I heard, no 4L GT3 engine (even not detuned) in the GT4.
Some rumors say, new flat 6 3.8L engine n/a with particulate filters.
Other rumors say flat 4 turbo or flat 6 turbo.
No signs of PDK. All prototypes that have been seen until today were manual.
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daily (no fun): BMW 430d
for fun: Porsche Boxster GTS
Nov 17, 2017 3:21:02 PM
acky:Some rumors say, new flat 6 3.8L engine n/a with particulate filters.
This would make the most sense to me, a detuned GT3 engine or a turbo from the 718 or Carrera, would be out of character for what the GT4 concept has been to date 
⇒ Carlos - Porsche 991 Carrera GTS
Nov 17, 2017 5:16:02 PM
Nov 17, 2017 5:44:12 PM
I think the GT4 engine choice reflects a much larger issue with the overall 718 concept as a 4 cylinder. I don't know about worldwide, but here in South Florida a new 718 of any flavor is a rare bird. The S models are essentially $100K cars and as 4 cylinder, regardless of HP, are a hard sell. A GT4 in any 6 cylinder guise amplifies the shortcoming of the 718 gambit and cast at least some doubt on the initial claims by Porsche that a turbo flat six could not be fit into the boxster/cayman platform. Porsche is at something of a crossroads with the GT4 because unless there is a 385HP twin turbo 4 in the GT4 the 718's long term viability immediately comes into question.
"Don't worry about avoiding temptation, as you grow older it will avoid you" Churchill
Nov 17, 2017 7:59:24 PM
jamesdamanuk1:Complete left field idea but what if they used the 3.0 from the 911 took the turbos off and tuned it up to 400bhp? Not sure if that would work, a proper baby GT morot at 3.0l
That would be 133 hp per Litre. The GT3 spinning to 9,000 rpm can only manage 125 hp per Litre. And it would have much less torque than the last GT4 (or even a current base Boxster)...
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18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi
DaveC:I think the GT4 engine choice reflects a much larger issue with the overall 718 concept as a 4 cylinder. I don't know about worldwide, but here in South Florida a new 718 of any flavor is a rare bird. The S models are essentially $100K cars and as 4 cylinder, regardless of HP, are a hard sell. A GT4 in any 6 cylinder guise amplifies the shortcoming of the 718 gambit and cast at least some doubt on the initial claims by Porsche that a turbo flat six could not be fit into the boxster/cayman platform. Porsche is at something of a crossroads with the GT4 because unless there is a 385HP twin turbo 4 in the GT4 the 718's long term viability immediately comes into question.
I’ve seen no more than a handful of 718s here, and half of them are base models driven by professional women. The very small sample probably points to something interesting, in that those buying 718s are probably interested in it due to styling or badge, but are less likely to be your traditional Porsche enthusiast.
Funny "update": Talked to a buddy today and he says that he thinks he heard that there will be a GT4 RS only, with a detuned GT3 engine, price tag similar to current GT3, maybe a few EUR less. 
He wasn't sure about it but he said he heard no GT4 but GT4 RS only. Probably more profitable for Porsche and also easier to justify higher price tag.
Again...rumor. This guy doesn't work at Porsche Motorsport, so he is relying at rumors as well.
RC (Germany) - Rennteam Editor Porsche 991 Carrera 4 GTS Cabriolet (2015), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)
Nov 18, 2017 3:12:19 PM
Nov 18, 2017 4:14:02 PM
Nov 18, 2017 4:20:19 PM
Nov 18, 2017 4:23:32 PM
Just the fact that there has never been a GT4RS, and comes out wirh a GT3 engine right before the disappearance of the last NA engines, they can detune the GT3 engine as much as they need, it will still sell like hot cakes even if at GT3 pricetags IMO.
⇒ Carlos - Porsche 991 Carrera GTS
Nov 18, 2017 5:53:06 PM
Pietrostone:In this case they just risk to have a GT4 with better performance than the GT3...
I don’t think the current 718 chassis with strut rear suspension is a good match for 500hp. Maybe the next generation Boxster/Cayman chassis will have a multi-link rear?
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18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi
Nov 18, 2017 6:04:32 PM
Grant:Pietrostone:In this case they just risk to have a GT4 with better performance than the GT3...
I don’t think the current 718 chassis with strut rear suspension is a good match for 500hp. Maybe the next generation Boxster/Cayman chassis will have a multi-link rear?
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18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi
I don’t know , but surely GT4 will take advantage from central engine displacement . The rear multi link suspension in 991 is also required due the rear engine position , maybe Cayman simply does not need a more complex rear suspension, maybe
Nov 18, 2017 6:13:26 PM
Pietrostone:Grant:Pietrostone:In this case they just risk to have a GT4 with better performance than the GT3...
I don’t think the current 718 chassis with strut rear suspension is a good match for 500hp. Maybe the next generation Boxster/Cayman chassis will have a multi-link rear?
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18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi
I don’t know , but surely GT4 will take advantage from central engine displacement . The rear multi link suspension in 991 is also required due the rear engine position , maybe Cayman simply does not need a more complex rear suspension, maybe
Even the 385hp GT4 shows limitations from that suspension (including rapid tire wear)
18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi
Grant:Pietrostone:Grant:Pietrostone:In this case they just risk to have a GT4 with better performance than the GT3...
I don’t think the current 718 chassis with strut rear suspension is a good match for 500hp. Maybe the next generation Boxster/Cayman chassis will have a multi-link rear?
--
18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi
I don’t know , but surely GT4 will take advantage from central engine displacement . The rear multi link suspension in 991 is also required due the rear engine position , maybe Cayman simply does not need a more complex rear suspension, maybe
Even the 385hp GT4 shows limitations from that suspension (including rapid tire wear)
Not on the ClubSport, which uses the rear multi link from the the GT4. The whole front clip however came from the GT3 Cup car.
Whoopsy:Grant:Pietrostone:Grant:Pietrostone:In this case they just risk to have a GT4 with better performance than the GT3...
I don’t think the current 718 chassis with strut rear suspension is a good match for 500hp. Maybe the next generation Boxster/Cayman chassis will have a multi-link rear?
--
18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi
I don’t know , but surely GT4 will take advantage from central engine displacement . The rear multi link suspension in 991 is also required due the rear engine position , maybe Cayman simply does not need a more complex rear suspension, maybe
Even the 385hp GT4 shows limitations from that suspension (including rapid tire wear)
Not on the ClubSport, which uses the rear multi link from the the GT4. The whole front clip however came from the GT3 Cup car.
On a race car, the stiff springs reduce suspension travel enough, so that the poor camber curve of the strut suspension is much less of an issue. Neither the GT4 nor ClubSport uses multi-link rear...
The trailing arm suspension of the early 911 also has a less than great camber curve (though better than strut) and a great way to help this is to increase spring rates, so that it doesn’t move much under load. This is great on a track car, but not for a street car with comfort requirements...
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18 GT3 Manual, 73 Carrera RS 2.7 Carbon Fiber replica (1,890 lbs), 06 EVO9 with track mods. Former: 16 Cayman GT4, 73 911S, Two 951S's, 996 C2, 993 C2, 98 Ferrari 550, 79 635CSi
GT4 RS will be a beast. I can see it match the GT3's performance without a sweat. It's an RS afterall. Maybe not by sheer power, but on track with better handling characteristics.
I have a feeling that Porsche is going out strong with the last NA engines.
White 991.2 GT3, V260 March 2018
Gauss:GT4 RS will be a beast. I can see it match the GT3's performance without a sweat. It's an RS afterall. Maybe not by sheer power, but on track with better handling characteristics.
I have a feeling that Porsche is going out strong with the last NA engines.
From a marketing point of view, this would make sense!
RC (Germany) - Rennteam Editor Porsche 991 Carrera 4 GTS Cabriolet (2015), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)
Nov 19, 2017 9:50:57 AM
Gauss:I have a feeling that Porsche is going out strong with the last NA engines.
The GT2 RS is already turbo and kicking everyone's a** so I am not sure how much the "last NA" matters from a marking point of view. Then again, I am an engineer, not a marketer 
2017 991.2 Carrera 4 GTS | GT Silver Metallic - The GT3 Killah!
2013 Audi S3 | Glacier White
Nov 19, 2017 10:48:58 AM
Nov 19, 2017 12:24:35 PM
the-missile:remember global foot print with gas emission...they can't do what they wish without facing massive fines.
You can't even imagine the challenge for the engine developers right now...we seem to be at a point where things will and have to change.
One example: The loudness of exhaust systems cannot change anymore, so when manufacuters are developing flap operated exhaust systems to change the sound (for example in certain driving modes), the dB level needs to be the same. Manually operated exhaust flap systems are forbidden on completely new models (see new RS5).
RC (Germany) - Rennteam Editor Porsche 991 Carrera 4 GTS Cabriolet (2015), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)
Nov 19, 2017 1:54:01 PM
I see exactly what you mean and the future is not bright for petrolhead... 
but the target of regular cars is funny because a tanker or a plane are burning way more than the rest of combustible engines. and by that, I mean millions of tons more, daily. 
it is just easy to smoke the population and force everybody to upgrade to different technologies by going ''green'' 
I will be interested to see the new regulations for the airfreight and seafreight manufacturer
GT Lover
Porsche fan
991.2 GT3 on order
991 GT3 2014(sold)
CAYENNE GTS 2014
Nov 25, 2017 11:32:13 AM
Offer for our German (European) GT4 lovers: My dealer just got a gorgeous GT4 factory(!) car with only 11k km on it. Car is like new (Porsche exchanged many parts), PCCB, very nice looking. Price is around 113k, lease is also possible (for Germans). Car really looks amazing.
RC (Germany) - Rennteam Editor Porsche 991.2 Carrera GTS Cabriolet (2017), Porsche Cayenne S Diesel (2017), Audi R8 V10 Plus (2016), Mini JCW (2015)
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