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The Nissan 350Z, equipped with the VQ35DE engine, is a popular platform for enthusiasts looking to enhance performance. Many owners start with a naturally aspirated (NA) setup but eventually seek to increase power through forced induction. In this article, we will explore the process of converting a 350Z VQ35DE from NA to a boosted setup, focusing on camshaft selection and ECU tuning to achieve 350-400 horsepower on the stock bottom end.
Understanding the VQ35DE Engine
The VQ35DE is a 3.5-liter V6 engine known for its smooth power delivery and reliability. It features an aluminum block and DOHC design, making it a solid choice for performance upgrades. The engine is capable of handling considerable power increases, especially with proper tuning and supporting modifications.
Benefits of Boosting the VQ35DE
Boosting the VQ35DE engine offers several advantages:
- Significantly increased horsepower and torque.
- Improved throttle response and overall driving experience.
- Potential for better fuel efficiency under certain conditions.
- Enhanced performance without the need for a complete engine rebuild.
Choosing the Right Forced Induction System
When converting to a boosted setup, selecting the right forced induction system is crucial. The two primary options are:
- Supercharger: Provides instant power and can be easier to install.
- Turbocharger: Offers higher peak power and efficiency but may require more complex installation and tuning.
Camshaft Selection for Boosted Applications
Upgrading the camshaft is essential for optimizing performance in a boosted VQ35DE. The right camshaft will improve airflow and help the engine make more power. Consider the following factors when selecting a camshaft:
- Duration: Longer duration can improve power at high RPMs but may sacrifice low-end torque.
- Lift: Higher lift allows for better airflow, which is crucial for forced induction.
- Overlap: Adjusting overlap can help with exhaust scavenging, improving performance.
Popular Camshaft Options
Some popular camshaft options for the VQ35DE include:
- JWT S1 Cams
- BC 264 Cams
- GReddy Cams
ECU Tuning for Boosted Performance
Tuning the ECU is critical for maximizing the performance of a boosted VQ35DE. Proper tuning ensures that the engine runs efficiently and safely under boost. Here are key aspects to consider:
- Fuel Maps: Adjusting fuel maps is necessary to accommodate the increased airflow from the forced induction system.
- Ignition Timing: Proper ignition timing is crucial for preventing knock and optimizing power delivery.
- Boost Control: Implementing a boost control strategy will help manage boost levels and prevent over-boosting.
Tuning Options
Various tuning options are available for the VQ35DE, including:
- Standalone ECU systems (e.g., AEM, Haltech)
- Reflash options (e.g., UpRev, EcuTek)
- Custom tuning by professional tuners
Supporting Modifications
To achieve reliable power levels of 350-400 horsepower, consider the following supporting modifications:
- Upgraded Fuel System: Larger injectors and a high-flow fuel pump are essential for meeting the fuel demands of a boosted setup.
- Intercooler: An efficient intercooler will help reduce intake temperatures, improving performance and reliability.
- Exhaust System: A high-flow exhaust will improve exhaust flow and help the engine breathe better.
- Upgraded Clutch: A stronger clutch will handle the increased power and torque effectively.
Conclusion
Converting a Nissan 350Z VQ35DE from NA to a boosted setup can unlock significant power potential while maintaining the reliability of the stock bottom end. By carefully selecting the right camshaft, tuning the ECU, and implementing supporting modifications, enthusiasts can achieve impressive performance levels of 350-400 horsepower. With the right approach, the 350Z can become a thrilling and powerful machine on the road or track.