Some good news and bad news, Porsche is dropping the GT3's NA engine for a turbocharged unit to meet power demands of over 500+ horsepower. Official figures aren't in yet but what's listed below for each turbocharged 992 model will give you guys a ball park of what to expect....
A more significant change comes with the introduction of turbocharged engines across the whole 911 range. You can expect the current 370hp 911 Carrera and 420hp 911 Carrera S’ 3.0-litre engines to be boosted by around 15hp, while the more-powerful models, such as the 911 Turbo S, will get power gains of closer to 50hp.
More hard-core GT3 models will likely come with turbocharged six-cylinder engines for the first time, too. Instead of a naturally-aspirated 4.0-litre unit, they’re expected to use a tweaked version of the 3.8-litre twin-turbo engine from the outgoing Turbo and Turbo S models producing significantly more than 500hp. - CarWow