Table of Contents
The Holset HX35 turbo upgrade is a popular choice among Subaru WRX enthusiasts looking to enhance performance. However, like any modification, it can come with its own set of challenges. In this article, we will explore some common problems associated with the Holset HX35 turbo upgrade and provide solutions to help you overcome them.
Understanding the Holset HX35 Turbo
The Holset HX35 turbo is known for its durability and ability to produce significant power gains. It is often favored for its efficiency and capability to handle higher boost levels compared to stock turbos. However, proper installation and tuning are crucial to ensure optimal performance.
Common Problems with the Holset HX35 Turbo Upgrade
- Boost leaks
- Oil supply issues
- Improper tuning
- Incompatible wastegate
- Heat management problems
1. Boost Leaks
Boost leaks can significantly hinder performance and are often caused by poor connections or worn-out hoses. These leaks can lead to lower boost pressure and reduced power output.
How to Fix Boost Leaks
To address boost leaks, perform a boost leak test. Use a smoke machine or a pressurized air source to identify leaks in the intake system. Once located, replace damaged hoses or tighten connections as necessary.
2. Oil Supply Issues
The HX35 requires a consistent and adequate oil supply for lubrication and cooling. Insufficient oil flow can lead to turbo failure.
How to Ensure Proper Oil Supply
Check the oil feed line for any blockages or kinks. Ensure that the oil pump is functioning correctly and consider upgrading to a larger oil feed line if necessary. Regularly check oil levels and quality to prevent issues.
3. Improper Tuning
After installing the HX35 turbo, improper tuning can lead to engine knock, poor performance, and potential engine damage. Tuning is essential to match the new turbo’s characteristics.
How to Tune Your WRX for the HX35
Use a reputable tuning software or consult with a professional tuner who has experience with the HX35 on WRX models. Ensure that the fuel maps are adjusted for the increased airflow and boost levels.
4. Incompatible Wastegate
The wastegate plays a crucial role in controlling boost levels. An incompatible or malfunctioning wastegate can lead to boost spikes or insufficient boost.
How to Address Wastegate Issues
Ensure that you are using a wastegate that is compatible with the HX35 turbo. Consider upgrading to an external wastegate for better boost control and performance. Regularly inspect the wastegate for proper operation.
5. Heat Management Problems
Upgrading to the HX35 can increase exhaust temperatures, which may lead to overheating and other heat-related issues.
How to Manage Heat Effectively
Install heat shields and consider using thermal wraps on exhaust components to reduce heat transfer. Additionally, ensure that your cooling system is functioning optimally and consider upgrading the intercooler to handle increased temperatures.
Conclusion
The Holset HX35 turbo upgrade can provide significant performance benefits for your WRX, but it is essential to be aware of the common problems that can arise. By addressing issues such as boost leaks, oil supply, tuning, wastegate compatibility, and heat management, you can enjoy the full potential of your turbo upgrade while minimizing risks.