They stated that there was insufficient room for a six plus the necessary equipment for turbocharging.
I'm making an educated guess here, but Porsche has to meet CAFE standards for average mileage requirements for it's fleet. That is why even though everyone wants GT4s and GT3s, Porsche still has to make more efficient models to counteract the gazz guzzlers. The 4 cylinder is lighter and with two less cylinders has less internal friction than a 6 cylinder. So if driven judiciously, it is a more efficient motor since it carries less weight and less friction and can make more power. It was also designed from the ground up to be turbocharged whereas the NA 6 was not. The motor is bigger and would be hard to fit the intercooler and plumbing in the tight Cayman/Boxster body. That is my educated guess.
They built a 3.0 dual turbo engine for the 992.
they could and maybe make it work but read my post. The 4 cylinder is lighter and more efficient and smaller which makes it easier to fit the plumbing and Inter cooler than a larger heavier motor. The cayman is
The weight and friction came from the Porsche engineer introducing the turbo motor, so just relaying what he said about the 4 cylinder, weight and friction. I didn't say emissions either, I said mileage. A manufacturer's fleet has to meet and average fleet mileage requirement. So for every 5.0 mustang built, Ford has to build 2 or 3 Eco Boosts or Fiesta to meet the fleet average requrements. I understand that consumption and emissions are related, but CAFE is about average mileage.
I've owned both a highly optioned 718 S and now have a GTS4.0. Essentially the same cars save for the engine. As much as I loved the S and it's 2.5T, I don't regret having traded it for the 4.0. I prefer the power delivery of the 4.0 and its exhaust note over the 2.5, but it's just that, a preference. I can't say anything negative about the 2.5T. There are those that wonder out loud if the 2.5T beats the 4.0 in the low end torque department. The published torque curves notwithstanding, I've never once felt as if the 4.0 was lacking on that score.
How come there are turboed 981s with the aftermarket turbo kit?
You asked why Porsche didn't turbo a six, and what I wrote was their response at the time. The question was a very common one back in 2015.
There’s a very nicely specced Shark Blue PDK GTS4.0 here:
