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Tuning a 13B rotary engine with a turbo upgrade can significantly enhance performance. However, both BorgWarner and Garrett installations may present unique challenges. Understanding common issues can help you troubleshoot effectively.
Common Issues with 13B Turbo Upgrades
- Boost leaks
- Inadequate fuel supply
- Turbo lag
- Excessive exhaust temperatures
- Oil starvation
Each of these issues can lead to performance losses or even engine damage if not addressed. Below, we will explore these problems in detail.
1. Boost Leaks
Boost leaks can occur due to improper fitting or wear in the intercooler piping. This can lead to a drop in power and efficiency.
Symptoms of Boost Leaks
- Loss of power during acceleration
- Unstable boost pressure readings
- Hissing noises from the engine bay
Troubleshooting Steps
- Inspect all hoses and clamps for tightness.
- Use a smoke test to identify leaks.
- Check the intercooler for any cracks or damage.
2. Inadequate Fuel Supply
When upgrading to a turbo, the engine requires more fuel. Insufficient fuel delivery can lead to lean conditions, causing knocking and damage.
Symptoms of Inadequate Fuel Supply
- Engine knocking or pinging
- Decreased performance at high RPMs
- Check engine light activation
Troubleshooting Steps
- Check fuel pump operation and pressure.
- Inspect fuel injectors for clogs.
- Ensure the fuel tank is clean and free of debris.
3. Turbo Lag
Turbo lag refers to the delay between pressing the accelerator and the turbo providing boost. This can be frustrating and affect drivability.
Symptoms of Turbo Lag
- Delayed throttle response
- Feeling of power loss during acceleration
Troubleshooting Steps
- Consider a smaller turbo for quicker spool.
- Evaluate the exhaust manifold design for efficiency.
- Check for any restrictions in the exhaust system.
4. Excessive Exhaust Temperatures
High exhaust temperatures can indicate a problem with the air-fuel mixture or insufficient cooling. This can lead to serious engine damage.
Symptoms of Excessive Exhaust Temperatures
- Discoloration of exhaust components
- Burning smell from the engine bay
- Engine misfires
Troubleshooting Steps
- Check the air-fuel ratio with a wideband O2 sensor.
- Inspect the cooling system for proper operation.
- Ensure the turbo is sized correctly for the application.
5. Oil Starvation
Oil starvation can occur if the turbo is not receiving adequate lubrication, leading to premature wear or failure.
Symptoms of Oil Starvation
- Unusual noises from the turbo
- Oil leaks around the turbo area
- Turbo failure or reduced performance
Troubleshooting Steps
- Check oil levels and quality.
- Inspect oil lines for blockages.
- Ensure the oil pump is functioning correctly.
By addressing these common turbo upgrade issues, you can ensure that your 13B engine performs at its best. Regular maintenance and thorough inspections will help prolong the life of your turbo system.