Porsche 997.1 Turbo Map Notes

Created by Will Trang
Last updated: Dec 15, 2021 by HJ Lee

Supported Vehicles:

  • 2007-2009 Porsche 911 (997.1) Turbo WM 
  • 2008-2009 Porsche 911 (997.1) GT2 WM

Map Revision:

  • Stage1 v105
  • Stage0 v105
  • Valet Mode v105
  • Vehicle Anti-Theft v105



Required Accessport Firmware:

Map Availability:





Fuel Requirements:

Each map lists the minimum required octane. A higher octane fuel can be used safely on a map designed for lower octane. DO NOT use maps designed for higher octane with lower octane fuels. Top Tier gasoline should be used where available.

  • Maps designated with "100" are for use with 100 octane/104 RON fuel or better.
  • Maps designated with "93" are for use with 93 and 94 octane/98 RON fuel or better.
  • Maps designated with "91" are for use with 91 and 92 octane/95 RON fuel or better.
  • Maps designated with "ACN91" are for use with 91 octane fuel found in Arizona, California, and Nevada or better.
  • Maps designated with "E85" are for use with 85% Ethanol, 15% Gasoline fuel only.


These maps are designed for E10 fuel (fuel with 10% ethanol content). For those who only have access to E0 fuel (fuel with 0% ethanol) it is recommended to use the "91" and "ACN91" octane versions of the maps and datalog the car to ensure your fuel is performing to the necessary level. This is especially important for those using Canadian 94 octane E0 fuel. 






Porsche 997.1 Turbo 



Stage1


997.1 TurboPeak GainsMax Gains

Stage1 91 (95RON):

+10.82% HP, +8.12% TQ

+19.88% HP, +20.00% TQ 

Stage1 

  • Exhaust Requirements: Stock
  • Intake Requirements: Stock air box with stock air filter
  • Boost Targets:
    • Normal Mode: 16psi (+/-1 PSI)
    • Sport Mode: 18psi (+/- 1PSI)

The additions of any other hardware may cause the vehicle to perform poorly.


Brake Boosting

Stage1, Stage2, and Stage3 OTS maps have brake boosting enabled for 2 seconds. You will be able to floor the gas with your foot on the brake to build boost. 

Chrono Sport/Overboost mode

A Factory option that increases boost for a short time period. The GT2 does not come with Sport mode and will not have the overboost function that the normal 997.1 Turbos have.  The timer for the sport button has also been raised to 30 seconds so that you can enjoy the overboost feature for longer.

Results may vary
Peak Gains are measured as the absolute maximum value between the highest points of two plots.
Max. Gains are measured as the average maximum value between the highest and lowest point of two plots.




Porsche 997.1 GT2



Stage1

997.1 GT2Peak GainsMax Gains

Stage1 91 (95RON):

+8.69% HP, +16.29% TQ

+19.71% HP, +18.98% TQ 

Stage1 

  • Exhaust Requirements: Stock
  • Intake Requirements: Stock air box with stock air filter
  • Boost Targets:
    • Normal Mode: 16psi (+/-1 PSI)
    • Sport Mode: 18psi (+/- 1PSI)

The additions of any other hardware may cause the vehicle to perform poorly.


Brake Boosting

Stage1 OTS maps have brake boosting enabled for 2 seconds. You will be able to floor the gas with your foot on the brake to build boost. 

Chrono Sport/Overboost mode

A Factory option that increases boost for a short time period. The GT2 does not come with Sport mode and will not have the overboost function that the normal 997.1 Turbos have.  The timer for the sport button has also been raised to 30 seconds so that you can enjoy the overboost feature for longer.

Results may vary
Peak Gains are measured as the absolute maximum value between the highest points of two plots.
Max. Gains are measured as the average maximum value between the highest and lowest point of two plots.




Non Performance Maps

Valet Mode 

  • Rev limiter set to 4000 RPM. Not for use with Stage3. Boost lowered to half of normal.

Anti-Theft Mode 

  • This map will not allow the vehicle to start.

Stage 0 

  • Stock calibration. No changes made at all. 



Closing Warnings and Precautions:

  • Use of inappropriate calibration/modification combinations will promote engine damage
  • Seek the help of a professional COBB Protuner should your Porsche Turbo fall outside of OTS map requirements.
  • Top Tier gasoline should be used when available. Use of lower quality fuels can result in catastrophic engine damage.





Revision Notes:

Map VersionNotes:
v105Updated maps to correct odd throttle/torque behavior unique to B742 ROMs only. All 997.1 Turbo maps updated to v105 for conformity, but B721, B730, B740, B821, and B830 maps are unchanged from V104.
v104

Map description fixes. 

v103

Updated maps to add factory fuel PID oscillation issue fix

v102

Updated maps to correct a factory fuel PID oscillation issue unique to B742 ROMS.  All 997.1 Turbo maps updated to v102 for conformity, but B721, B730, B740, B821, and B830 maps are unchanged from V101.

v101

Improved map stability and map maintenance update for future feature support.

v100

 Adjusted load correction, load and torque limits, raised vehicle rev limits, raised vehicle speed limits, brake boosting enabled for 2 seconds. Also increased boost in both normal and sport modes. Made fueling changes as well as timing changes and raised the timer for sport mode to 30 seconds.