APR Porsche 911 Turbo 3.8T (991.2) - APR Plus, Stage 1, and Stage 3 Turbo S Turbo Upgrade!

By: APR | 11/17/2021 < Back to Blog Home
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We're excited to announce our Engine Control Unit (ECU) Upgrades are now available for the Porsche 911 (991.2) Turbo 3.8T engine with the Continental SDI 21 ECU! Expect massive gains with up to 612-754 HP and 623-701 FT-LBS of torque on tap, depending on octane and stage!


Our new suite of software comes after months of extensive research and development that is typically absent from the aftermarket. Our upgrade makes the engine more powerful and more exciting. We’ve extensively calibrated the system to work flawlessly on the track, while retaining safety routines to protect your engine in the most demanding scenarios. This was all made possible by our engineering team's pursuit of perfection. Development vehicles were outfitted with additional sensors, including turbo shaft speed sensors, thermocouples, transducers, and more, along with our high speed direct RAM logging equipment, to feed valuable data to the team for analysis. After thousands of hours of testing and tuning we created new calibrations that are fine tuned for several octanes and contain hundreds of map changes, with a vast array of safety features built in.


APR ECU Upgrades for the Porsche 911 Turbo 3.8T (991.2)

  • Delivers up to 612 HP with 623 FT-LBS of torque (APR Plus)
  • Delivers up to 612-688 HP with 623-679 FT-LBS of torque (APR Stage 1)
  • Delivers up to 654-754 HP with 627-701 FT-LBS of torque (APR Stage 3)
  • Max gains of +98 AWHP with +107 AWFT-LBS of torque (APR Plus)
  • Max gains of +98-165 AWHP with +107-165 AWFT-LBS of torque (APR Stage 1)
  • Max gains of +122-213 AWHP with +121-188 AWFT-LBS of torque (APR Stage 3)
  • Supports 91 AKI, 93 AKI, 100 AKI, 104 AKI, and E60-E85 fuel grades
  • Ethanol and race fuel support for maximum power on the race track
  • Optional factory term limit matching limited powertrain warranty with APR Plus
  • Multiple stages of performance offered
  • Switchable power levels through Porsche’s Normal, Sport, and Sport+ profiles
  • Linear throttle mapping
  • Standing RPM soft limiter increased
  • Left-foot braking / brake boosting added
  • Optimized thermal management with various engine safety protection routines added
  • Auto Start/Stop defaults to the off position
  • Enhanced power delivery and drivability through recalibrated exhaust flap actuation
  • Speed limiter removed
  • No hardware required for APR Plus or Stage 1 (Software only)
  • Supports standard bolt on modifications
  • Supports Turbo S Turbochargers (Stage 3)
  • Free lifetime updates
  • Direct OBDII port flash (No ECU removal)
  • 30 day money back guarantee
APR ECU Upgrades for the Porsche 911 Turbo 3.8T (991.2)
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