Cobb AP tuned Porsche 991 Turbo with By Design Stage IV turbo upgrade makes 665 to all four wheels
We're finally starting to see some data for the By Design Xona Rotor based 991 Turbo and Turbo S turbocharger upgrade
. When upgrading the turbochargers fueling of course is a concern. Power in the ~650 all wheel horsepower range is about the limit of the stock fuel system
This car is getting around that limit thanks to supplemental methanol injection. The result is 665 horsepower and 658 lb-ft of torque at all four wheels on what looks to be a Mustang Dyno:
These looks to be more in it as well. Keep in mind these are Xona Rotor / Tial HTZ 65 impellers in the stock housings. The really big upgrades are still yet to come.