4nroots

To me sounds like it could be Turbo H4, but stop-and-go barely above idle it's difficult to tell. The sound is not far from something like this as well:

JCviggen

Probably me. During the interview I noted the spy shots we had seen of the 982 GT4 and the speculation around it while acknowledging that obviously I know he can't talk about it. He was clear in general that they want to stay NA but honestly it's fairly obvious that for them the GT3 is "it" in terms of quintessential GT car and keeping the NA engine alive in that car is important to them. I don't know whether they mean ALL GT cars will stay NA or the MAIN GT car will stay NA.

They need to work on the NA engine to fit a mandatory particulate filter from September onwards. For that reason all 991.2 GT3 RS being produced until that cutoff date will be for the EU, after that ROW which does not have the particulate filter requirement. That will give them more time to make it work to their satisfaction. He was clear enough on the point that it is a work in progress which they believe they will be able to complete but it's not for tomorrow. That would also make it difficult for any NA GT4 launch in the near future given that they're still working on adapting the engine to the latest emission demands.

I could see the Spyder getting a more powerful 4 banger turbo and GT4 staying NA I suppose...but there are some problems with that too. If they give the Spyder, say, 390 to 400 horsepower out of the turbo engine then it would be faster in many situations than a 420hp NA engine that would theoretically power the GT4. And it would be sort of an admission on Porsche's part that the 718's power plant really isn't as good as the old 6. Staying with the 4 pot is a lot more consistent from that point of view, and it would help with racing even if it will make the new car nowhere near as popular for enthusiast buyers. Either way I think the probability of GT4 going 4-banger turbo just went up quite a lot with this video. It has to be no worse than 50/50 now.

Five12Free

CAlexio

Most sane and realistic post in this entire thread... and that's saying something!

thigos

I think you're on to something

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tcsracing1

The 718 Boxster is 2.0L 300hp. 718 Boxster S is 2.5L 350hp. 718 Boxster GTS is 2.5L 365hp.
If they make the Spyder a turbo, they will most likely have to increase it to 2.7L turbo as the 2.5L in the GTS is already tuned out and Porsche need to make more HP then previous Spyder 385hp. 400hp is a safe bet.

Not sure how a turbo will help with racing as I wouldnt look forward to being the team trying to figure out overheating issues trackside summer 2019, however a 4 pot 2.7L 400hp turbo motor would be easy enough for Porsche to install in the 718 GT4.

No doubt, the future is turbo for all GT cars....and when that day comes, the last normally aspirated GT car values will take off.

GrantG

Why would you think the 2.5L is already maxxed out? Maybe its turbocharger is, but I would think the 2.5L with appropriate turbo should be able to easily exceed 400hp and 400 ft-lbs. I would guess they could even approach 500hp if they chose to. Even Mercedes does over 200 hp per Liter in their entry-level AMG car:

https://www.autocar.co.uk/car-news/n...0-litre-engine

Crazy Eddie

tcsracing1

Porsche Engineers like to be conservative and reliable. So to take the 781S motor from 350hp to an additional 50hp with a tune seems like something they wouldnt do.
They only brought the 718 GTS up by 15hp...

Besides, from a marketing standpoint (if in fact Spyder goes turbo), I cant seem them using the same 2.5L displacement in the Spyder even if it made 400hp.
The car needs to be more then a GTS with a fancy top and further tune.

9elheven

Yes, it's fairly easy to bump hp/tq with a boost pressure and fueling increase, assuming the increased heat is a resolvable issue.

My less-than-completely-certain conclusion from the video is that it is a turbo motor in the Spyder. I really thought that the GT4 would be a NA 4.0 shared with the GT3, but just hobbled. However, it makes sense to go turbo throughout the remainder of the lineup with respect to emissions and fuel economy needs due to politicized (but unnecessary) governmental dictates, along with decreased production costs, and save the GT3 for the NA. I hope I'm wrong and they keep the GT4 NA with a 4.0, with 420-440-ish hp, perhaps 450 hp. If it's a turbo, I'll just keep my beloved 981 GT4.

bhk1004

Also possible the 3.8 wasn't a motorsport motor so it could be shared but the 4.0 is a motorsport engine so the spyder won't be getting it. And possibly we will see a separation motorwise between the spyder and gt4. As the previous spyder didn't get any of the motorsport suspension bits or the brakes as well. Just food for thought.

just possibilities if the spyder gets a turbo motor..

d00d

Porsche, like Uncle Miltie, only pulls out enough to win the contest. ;)

911F1

Was the 981 Spyder and 981 GT4 delivered to customers around the same time? Or did the 981 Spyder come out first?
I can't remember. Thanks

9elheven

d00d, I thought that was Roddy McDowall...

Diablo Dude

The Spyder made its debut at the NY Auto Show in early April of 2015.
It was launched into the US market in October of 2015.

The GT4 made its world debut at the Geneva Motor Show in early March of 2015.
PCA introduced it to North America in French Lick, Indiana at a Concours Banquet in June of 2015.
I believe deliveries started in July of 2015?