Alright, let's explore some of the benefits you can gain from switching from an Internal Wastegate (IWG) to an External Wastegate (EWG) setup. (Open the subtitle to get the instructions step by step with the following video)
Performance Gains
- Higher Boost Potential: EWGs are generally better at handling higher boost pressures than IWGs, as they can flow more exhaust gas away from the turbine. This can lead to increased power output, especially at higher RPMs.
- Improved Boost Control: EWGs typically offer more precise and consistent boost control, particularly at higher boost levels, reducing the risk of boost spikes and creep.
- Reduced Backpressure: EWGs vent exhaust gases further away from the turbine housing, which can reduce backpressure and improve overall engine efficiency. This can lead to improved throttle response and power gains across the rev range.
Tuning & Flexibility
- Greater Tuning Potential: EWGs provide more flexibility for tuning and optimizing boost control for specific driving conditions and performance goals.
- Upgradability: EWG setups are often easier to upgrade or modify in the future, allowing for greater customization and potential for even higher power levels.
Other Benefits
- Reliability: EWGs can improve the reliability of your turbocharger system by reducing the stress on the internal wastegate mechanism, which can be prone to failure under high boost conditions.
- Sound: EWGs often produce a more aggressive and distinctive exhaust sound, which can be appealing to performance enthusiasts.
Considerations
- Cost & Complexity: EWG setups are generally more expensive and complex to install than IWG setups, requiring additional components and fabrication work.
- Noise: The open dump design of many EWG setups can be significantly louder than IWG setups.
- Tuning Requirements: EWG setups may require more extensive tuning to achieve optimal performance and avoid issues like boost creep or boost spikes.
Overall
Converting from an IWG to an EWG can offer significant performance benefits, particularly for those seeking higher boost levels and greater tuning flexibility. However, it's important to weigh the potential gains against the increased cost and complexity of the installation and tuning process. If you're looking to maximize the performance of your turbocharged engine and have the budget and expertise to handle the upgrade, an EWG setup can be a rewarding modification.