Audi RS6/RS7 C7 Tuning Guide

The Audi RS6 and RS7 C7 offer exceptional performance straight from the factory, but for many enthusiasts, the idea of enhancing their car’s power and driving experience is a tempting proposition. Tuning can provide substantial gains in power, handling, and overall driving enjoyment. However, it’s important to approach tuning with caution and a clear understanding of the modifications involved.

To make the tuning process easier to understand, it’s often broken down into "Stage" tuning, which refers to different levels of modification. In this guide, we’ll focus on Stage 1 and Stage 2 tuning for the C7 RS6/RS7, outlining what each stage involves and what you should consider when modifying your vehicle.

You can find a full list of our tuning parts for the RS6/RS7 C7 here

Stage 1 Tuning: Software and Basic Enhancements

Stage 1 tuning is typically the simplest and most straightforward form of modification. It involves software changes and minor upgrades that increase power and improve driving performance without requiring significant hardware changes. This stage is ideal for those looking for an increase in performance without voiding warranties or making major alterations to the car’s structure.

Key Modifications for Stage 1:

ECU Remap or Tuning Box
The most significant upgrade in Stage 1 tuning is an ECU remap or the installation of a tuning box. By modifying the vehicle’s engine control unit (ECU), you can increase horsepower, torque, and improve throttle response. A typical Stage 1 remap on an RS6 or RS7 can yield anywhere from 50 to 100 horsepower, depending on the specific software and tuning company.

Air Intake Upgrade
While not always required, an upgraded air intake system can complement a Stage 1 remap. A performance air filter or intake can improve airflow to the engine, enhancing throttle response and slightly increasing power output.

JXL Performance recommends K&N Performance Replacement Air Filter

Exhaust Modifications
A high-flow exhaust system can be installed to improve engine breathing. While Stage 1 tuning doesn’t typically require a full exhaust system replacement, a less restrictive exhaust can help reduce backpressure and slightly increase power. It also provides a more aggressive sound, enhancing the overall driving experience.

Check out our range of exhaust systems here!

Intercooler Upgrade
In some cases, an upgraded intercooler is a recommended modification for Stage 1, particularly if you live in warmer climates. A larger intercooler improves the cooling of intake air, which can help maintain performance under load and prevent heat soak during spirited driving.

JXL Performance recommends the Wagner Tuning Audi RS6/RS7 C7 BiTurbo Intercooler Kit

Advantages of Stage 1 Tuning:

• Minimal investment in hardware
• Noticeable power gains, usually around 50-100hp
• Retains most of the car’s factory characteristics
• Easier to reverse, meaning it can often be undone if required (such as for resale or warranty purposes)

Stage 2 Tuning: Increased Power with Hardware Modifications

Stage 2 tuning is more involved and includes both software and hardware modifications that further increase the performance of the vehicle. This stage is aimed at those who want significant power gains, improved responsiveness, and a more aggressive driving experience. However, it’s important to note that Stage 2 modifications can place more strain on engine components, so the car’s reliability and long-term maintenance should be carefully considered.

Key Modifications for Stage 2:

Upgraded Downpipes
One of the key components in Stage 2 tuning is the installation of upgraded downpipes. The stock downpipes in the RS6/RS7 are designed for emissions compliance, but they can restrict airflow. Performance downpipes, often with high-flow catalytic converters or even catless versions, reduce exhaust backpressure and allow the turbochargers to spool more efficiently. This results in a significant increase in power, often adding 50 to 100 horsepower over Stage 1.

Check out our range of downpipes here!

Upgraded Intercooler
While an intercooler upgrade can be beneficial at Stage 1, it becomes more important at Stage 2. With the increase in power and turbo boost, the intake air will become hotter, so a larger, more efficient intercooler helps keep temperatures down, preventing heat soak and ensuring consistent power delivery.

Check out all of our cooling modifications for your RS6/RS7 here

Full Exhaust System
At Stage 2, a full performance exhaust system is often required. This can include a larger downpipe (as mentioned above), a mid-pipe, and a high-performance rear section. A complete exhaust system will further reduce exhaust restrictions, helping the engine to breathe better and potentially providing more gains in horsepower and torque.

Upgraded Clutch or Transmission Modifications
For higher power levels, it’s sometimes necessary to upgrade the clutch or transmission components, particularly if you’re pushing the car beyond its factory performance levels. This could be as simple as a TCU (Transmission Control Unit) tune, or it could involve re-inforcing the gearbox dependent on your goal power level. 

Advantages of Stage 2 Tuning:

• Significant power gains, typically around 100-150hp or more
• Enhanced turbo performance and throttle response
• Improved sound and driving dynamics, especially with the upgraded exhaust system
• A more aggressive and track-capable setup

Considerations for Stage 2 Tuning:

• Can put more strain on engine components, requiring increased attention to maintenance
• May void manufacturer warranties, depending on the modification and location
• Requires a larger investment in both parts and labour compared to Stage 1
• May affect fuel economy due to the increased power output

Which Stage is Right for You?

The choice between Stage 1 and Stage 2 tuning depends largely on your goals, how much power you want to add, and your willingness to invest in the car’s long-term performance. If you’re after a noticeable performance improvement with minimal investment and without significantly altering the car’s stock systems, Stage 1 is an excellent option. It’s an ideal choice for daily drivers who want a more engaging driving experience without compromising reliability.

Stage 2 tuning is a more comprehensive upgrade for those who want to push their RS6 or RS7 to higher performance levels, such as for track days or more spirited driving. However, it comes with a higher cost, both in terms of parts and the potential for more frequent maintenance, and requires careful consideration of the vehicle’s overall durability.

Conclusion

Tuning your Audi RS6 or RS7 C7 is an exciting way to unlock the full potential of these high-performance vehicles. Stage 1 and Stage 2 tuning provide a structured way to modify your car, allowing you to break down the process into manageable steps. Whether you’re looking for a simple performance boost or a more aggressive setup, understanding the modifications involved and the potential benefits will help you make an informed decision that suits your driving needs. Always ensure your modifications are done by professionals to avoid damage to your vehicle and ensure optimal performance.