This website uses cookies to identify visitors, track visitors to our website, store login session information and to remember your user preferences. By continuing to use this site you agree to our use of cookies. Learn More.

This website uses cookies. By continuing to use this site you agree to our use of cookies. Learn More.

My Cart: 0 item(s)

follow us:

Secure Checkout


EA839 2.9T ECU Tune
Purchase EA839 2.9T ECU Tune
  • SKU: 05-839-00133-2

    EA839 2.9T ECU Tune

  • Advertised gains are estimates of HP and Torque “at the engine” calculated from gains as measured on a Dynojet Dynamometer in ideal conditions and typically show the largest possible change.  Actual gains are dependent on the following: Learn More about Crank HP Vs Wheel HP

    Model – Manufacturers use the same engine in multiple model vehicles and often times they are in a different state of tune, for example: 2008 C63 and a 2008 CLK Black Series.  Both have the same engine, but the C63 has 451hp while the CLK63 has 500hp.  Naturally the C63 will show more gains as it starts at a lower level.

    Model Year – Similar to above, as time progresses, Manufacturers tend to slightly increase power output via software from one year to the next or offer “Performance Packages” with increased power.  The engines remain largely unaltered and as a result, final tuned output remains the same, while the gains are lower as the starting point is now higher.

    Fuel – Fuel quality is HIGHLY important with performance vehicles.  Low quality and/or low octane fuel will greatly impact engine output and potentially even engine health.  Top tier brand premium fuels should always be used to achieve the best results possible.

    Drivetrain – All wheel drive has higher drivetrain losses than rear wheel drive.  This results in lower numbers when testing on a chassis dyno.  Wheel/tire size and weight will also impact chassis dyno results

    Weather/Conditions – Temperature, humidity, altitude, and air density all impact engine performance.  Heat, high humidity, and thin air will all work towards reducing engine output

    Engine Health – Higher miles tends to result in increased build up and lower compression which can and will impact engine output.  Properly maintained engines will have better performance than abused or neglected engines.

    Supporting modifications – The highest power levels require supporting modifications.  Depending on the engine, this could mean forged internals, built transmission, upgraded fuel system, 110+ octane race fuel, etc.

  • $1,299.00

  • Prop 65 warning

    This product can expose you to chemicals including carbon black, silica - crystalline, formaldehyde, and lead which are known to the State of California to cause cancer, and lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to

Weistec Horsepower 525
Weistec Torque 630
Manufacturer Weistec
Street legal in all the US States No
Engine Family EA839
Stock Horsepower 490
See more
year make model trim engine
2020 Audi RS5 Base (B9) Twin Turbo 2.9L V6 (EA839)
2019 Audi RS5 Base (B9) Twin Turbo 2.9L V6 (EA839)
2019 Porsche Cayenne S (536) Twin Turbo 2.9L V6 (EA839)
2018 Audi RS5 Base (B9) Twin Turbo 2.9L V6 (EA839)

ECU Tuning Process: How do I get my ECU tuned?

The EA839 engine is a potent and capable powerplant in addition to being paired with the famous AWD systems Audi/Porsche is known for.  Through rigorous testing on both the street and dyno, the Weistec EA839 ECU Upgrade for the 2.9 Liter Twin Turbo V6 engines reliably extract massive gains in the mid-range of the powerband as well as substantial gains in the top end making it a top performer in all driving situations. 

Toggle between W.1 and W.2 above to see various levels of power gains achievable with our tuning. 


ECU Tuning Process: How do I get my ECU tuned?

Key Features:

  • Increased Boost
  • Optimized Fueling
  • Optimized Ignition Timing
  • Removed Speed Limiter
  • Increased Cruise Control Speed Limit
  • Removed Neutral Rev Limit
  • Optional Burble
*Power gains vary based on model, modifications, fuel, and running conditions.