How To Run Full E85 On N55

If you’re looking to push your N55 engine to its limits, then switching to full E85 fuel might be the way to go. Not only does it offer higher octane ratings, but it also burns much cleaner, resulting in improved performance and horsepower gains.

However, running full E85 on your N55 engine requires a few upgrades and modifications to ensure compatibility and performance.

To start, you need to ensure that your N55 engine can handle E85 fuel. While most modern engines are designed to run on E85, some older models may not be compatible. It’s important to check your owner’s manual or consult with a professional mechanic before making the switch.

Once you’ve confirmed compatibility, the next step is to upgrade your fuel injectors and install a high-pressure fuel pump to ensure proper fuel flow. A custom tune is also necessary to optimize your engine’s performance and make the most out of the E85 fuel.

Finally, monitoring your engine’s performance and maintenance is crucial to ensure long-term reliability and prevent any potential issues.

By following these steps, you can successfully run full E85 on your N55 engine and experience the full benefits of this high-performance fuel.

Ensure Compatibility of Your N55 Engine

Ensuring the compatibility of your N55 engine is crucial to successfully running full E85. Before you start, you need to understand that not all engines are compatible with E85 fuel. E85 requires different engine modifications and fuel system upgrades to run smoothly.

Thus, the first step is to check if your N55 engine is compatible with E85. To ensure compatibility, you need to check the engine’s compression ratio. High compression ratios are not suitable for E85 fuel, as it has a lower energy content than gasoline. Therefore, you must lower the compression ratio by installing lower compression pistons or head gaskets.

Additionally, you need to upgrade the fuel system to handle the increased fuel demand. This includes upgrading the fuel pump, fuel injectors, and fuel lines to handle the increased flow rate required by E85. By ensuring the compatibility of your N55 engine, you’ll be able to run full E85 without any problems.

Upgrade Fuel Injectors

To upgrade your fuel injectors for full E85 compatibility on your N55 engine, you must determine the right injector size and install the upgraded injector.

The right injector size will depend on your horsepower goals and fuel system modifications.

Once you have determined the right size, you can install the upgraded injector with proper torque specifications and ensure proper fuel pressure.

Determine the Right Injector Size

Choosing the correct injector size is crucial for running full E85 on your N55 engine. The correct injector size ensures that the engine receives the correct amount of fuel to run efficiently and safely.

Injector sizing calculations are based on several factors, including the engine’s horsepower, fuel flow rate, and fuel pressure. It’s important to consider the fuel type you’ll be using when choosing the right injector size. E85 has a higher fuel flow rate than gasoline, so a larger injector size may be required.

It’s also important to consider the fuel pressure, as increased pressure can help compensate for a smaller injector size. By determining the right injector size for your engine and fuel type, you’ll be able to ensure that your engine runs smoothly and efficiently on full E85.

Install the Upgraded Injector

Now that you’ve determined the right size injector for your N55 engine when using E85, it’s time to install the upgraded injector. The installation process may vary depending on the type of injector you purchased, but generally, it involves removing the old injector and replacing it with the new one.

Before the installation process, it’s crucial to perform injector performance testing and troubleshooting to ensure that the new injector is functioning correctly. Testing the new injector ensures that it’s delivering the right amount of fuel to the engine and helps you identify any issues that may affect its performance.

Troubleshooting, on the other hand, enables you to identify and fix any problems that may arise during the installation process. By following these steps, you can install the upgraded injector successfully and maximize your N55 engine’s performance and fuel efficiency.

Install High-Pressure Fuel Pump

Installing a high-pressure fuel pump is crucial for getting maximum power output from your E85-powered N55 engine. The fuel pump compatibility is a crucial aspect that you should consider when choosing the right pump for your engine. You need to ensure that the fuel pump you choose is compatible with E85 fuel, as not all pumps are designed to handle the high ethanol content.

Once you’ve selected the right high-pressure fuel pump that’s compatible with E85, it’s time to proceed with the installation process. The installation process may vary depending on the make and model of your vehicle, but generally, it involves removing the old fuel pump and replacing it with the new one. You’ll need to follow the manufacturer’s instructions carefully to ensure that the installation is done correctly.

Once the installation is complete, you can be assured that your N55 engine can run on full E85, and you’ll be able to achieve maximum power output.

Custom Tune Your Engine

To optimize the performance of your N55 engine running on E85, you need to have it custom-tuned by a professional tuner who can adjust the optimal tuning parameters for your engine. These parameters include air/fuel ratio, ignition timing, and other factors that can affect power output and drivability.

The custom tuning process involves using specialized equipment to precisely adjust these parameters to achieve the best possible performance from your engine. The benefits of custom tuning your N55 engine for E85 are significant.

With the right tuning, you can expect to see improved horsepower and torque, better throttle response, and smoother acceleration. When you take your car to a professional tuner, they will typically perform dyno testing to evaluate the performance gains achieved through custom tuning.

With dyno testing results in hand, you can be confident that your engine is running at peak performance and that you have full control over your car’s power output.

Monitor Performance and Maintenance

To ensure your engine continues to perform at its best, it’s important to monitor its performance and maintenance regularly. This includes tracking fuel efficiency and emissions, which can help identify any potential issues with your engine or fuel system.

Additionally, performing regular maintenance on your engine and fuel system can help prevent costly repairs and keep your vehicle running smoothly. Keep a close eye on your engine’s performance metrics and take proactive steps to keep it in top condition.

Track Fuel Efficiency and Emissions

Monitoring your fuel efficiency and emissions while running full E85 on your N55 engine can be a helpful way to track your car’s performance and environmental impact. Real world testing has shown that using E85 can result in a decrease in fuel efficiency compared to regular gasoline. It’s important to track your fuel efficiency and compare it to your previous records to ensure that your engine is performing optimally.

In addition to monitoring fuel efficiency, it’s also important to track your emissions when running on E85. While E85 is a cleaner-burning fuel compared to gasoline, it still produces emissions that can contribute to air pollution. By tracking your emissions, you can identify any potential issues and take actions to minimize your environmental impact.

Cost analysis is also important when running on E85, as it can be more expensive than regular gasoline. By monitoring your fuel efficiency and emissions, you can ensure that you’re getting the most out of your investment in E85 fuel.

Perform Regular Maintenance on Your Engine and Fuel System

Make sure you regularly maintain your engine and fuel system to keep your car running smoothly on E85 fuel. The importance of cleanliness can’t be overstated.

Dirty fuel injectors, clogged fuel filters, and contaminated fuel can all negatively impact engine performance on E85 fuel. Regularly checking and replacing your fuel filter can help prevent clogs and ensure proper fuel flow. Additionally, using fuel system additives can help keep your fuel system clean and running efficiently.

Another important aspect of maintaining your engine for E85 fuel is monitoring your spark plugs. E85 fuel burns hotter than regular gasoline, which can cause your spark plugs to wear out faster. Replacing your spark plugs more frequently than normal can help prevent misfires and keep your engine running smoothly.

It’s also important to check your oil more frequently and change it regularly to prevent buildup and ensure proper lubrication.

By regularly maintaining your engine and fuel system, you can ensure optimal performance and efficiency when running on E85 fuel.


In conclusion, running full E85 on your N55 engine requires a few important steps to ensure optimal performance. You must first confirm that your engine is compatible with E85 fuel and capable of handling the higher ethanol content.

Once confirmed, upgrading your fuel injectors to handle the increased flow rate is necessary. Installing a high-pressure fuel pump is also crucial to ensure proper fuel delivery to the engine.

Next, custom tuning your engine is necessary to ensure that it’s calibrated for E85 fuel and can handle the increased power output. This is a critical step, as failure to properly tune your engine can result in damage to your engine and other components.

Finally, monitoring your engine’s performance and maintenance regularly is essential to ensure that it continues to operate smoothly and efficiently.

It’s important to note that running full E85 on your N55 engine can significantly increase horsepower and torque, but it also requires careful attention to detail and regular maintenance. With the proper upgrades and tuning, however, you can enjoy the benefits of running E85 and take your N55 engine to the next level of performance.