Rajan Wilcox
The Mitsubishi Lancer Evolution, or Evo, is a high-performance sports car that has undergone several iterations since its debut in 1992. The Evo 8 and Evo 9 are two such iterations, and one question that has arisen among car enthusiasts is whether the fuel tank of the Evo 9 can be fitted into the Evo 8. The fuel tank in the Evo 8/9 has sparked curiosity about its functionality, with discussions on forums focusing on the sensors, siphoning mechanisms, and potential modifications. While some sources indicate that the Evo 8 and Evo 9 share certain fuel tank components, it is unclear if the entire fuel tank assembly is interchangeable between the two models.
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What You'll Learn
- The Evo 8/9 fuel tank is a Mitsubishi OEM part
- It has a jet pump that siphons fuel between the two sections of the tank
- The sensors on the driver's side and passenger side monitor fuel levels
- A fuel surge tank setup can be created using the OEM tank with its pump
- There are various fuel surge tanks and accessories available for the Evo 8/9
The Evo 8/9 fuel tank is a Mitsubishi OEM part
The Evo 8/9 fuel tank is engineered with a unique design that includes a jet pump system for efficient fuel siphoning. This system allows the tank to function like a surge tank setup, ensuring smooth fuel delivery to the engine. The tank has two sections on either side of the driveshaft, with a line connecting the passenger side to the right side, facilitating the transfer of fuel between the two sides.
Additionally, the Evo 8/9 fuel tank is equipped with various sensors to monitor fuel levels and other parameters. On the driver's side, there is a fuel pump sending unit, while the passenger side features a fuel lever and potentially a fuel vapor sensor. These sensors work together to provide accurate fuel level readings and ensure the proper functioning of the fuel system.
As a Mitsubishi OEM part, the Evo 8/9 fuel tank is designed to meet the exact specifications of the vehicle, ensuring seamless installation and reliable performance. This fuel tank is a direct replacement for the original part, guaranteeing easy maintenance and peace of mind for Mitsubishi Evo 8 and 9 owners.
Overall, the Evo 8/9 fuel tank, being a Mitsubishi OEM part, offers superior quality, compatibility, and performance. Its innovative design, including the jet pump system and sensor configuration, ensures efficient fuel management and optimal driving experiences for Mitsubishi Lancer Evolution enthusiasts.
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It has a jet pump that siphons fuel between the two sections of the tank
The OEM EVO 8/9 fuel tank has two sections, with a jet pump that siphons fuel between them. This jet pump works to transfer fuel from one section of the tank to the other. The jet pump has no moving parts and operates by creating a vacuum in a T-connector, which then sucks the fuel and transfers it.
The primary side of the tank, which fills first, contains the pump that provides pressure to the fuel rail. This side usually uses a fuel pump module that connects to the vehicle over a serial data bus. The secondary side of the tank contains a transfer pump, also known as a jet pump.
The jet pump in the EVO 8/9 fuel tank is an essential component of the fuel system, ensuring the smooth transfer of fuel between the two sections of the tank. This design is common in saddle-style tanks, which use a returnless fuel system to regulate pressure to the fuel rail inside the tank.
To create a surge tank setup, the OEM fuel pump sending assembly can be used to send fuel to the surge tank, and the return line can direct fuel back to the OEM tank. This setup allows for the efficient management of fuel distribution and ensures the engine has access to the fuel it needs.
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The sensors on the driver's side and passenger side monitor fuel levels
Newer cars may use ultrasonic sensors that emit a sound wave and calculate the time it takes for the wave to bounce back to determine the distance from the sensor to the fuel surface. This calculation is based on the fixed value of the speed of sound.
In the case of the EVO 8 and 9 fuel tanks, there appears to be some confusion about the purpose of the sensors. One source suggests that the sensor on the driver's side monitors the fuel level from half a tank to empty, while the sensor on the passenger side monitors the level from full to half a tank. However, this is based on personal observation and may not be the definitive function of these sensors.
The EVO 8 and 9 fuel tanks also feature a fuel return line that creates a vacuum in a T-connector to siphon fuel between the two sides of the tank. This setup ensures a consistent fuel supply and maintains optimal fuel levels during vehicle operation.
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A fuel surge tank setup can be created using the OEM tank with its pump
The process begins with the OEM tank's pump sending fuel to the surge tank. The surge tank is an additional fuel storage device, often with a capacity of around 3 liters, that is installed in the vehicle. This tank is continuously filled by the OEM tank's pump, ensuring a constant supply of fuel.
The fuel then flows from the surge tank to the engine. During periods of high demand, such as high-performance driving, the surge tank provides a consistent supply of fuel to the engine, preventing fuel starvation. This is achieved by utilizing a supply fuel pump located in the main fuel tank (the OEM tank) to continually fill the surge tank, keeping it overfilled.
The return line from the engine then sends any unused or excess fuel back to the surge tank. This excess fuel is then redirected back into the main fuel tank (the OEM tank) through an overflow line. This ensures that the surge tank does not reach full capacity and can continue to receive fuel from the OEM tank.
Additionally, the setup may include a fuel pressure regulator to control the flow of fuel and ensure the right amount is delivered to the engine. This regulator can also direct excess fuel returned from the engine back into the surge tank, further maintaining the fuel supply.
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There are various fuel surge tanks and accessories available for the Evo 8/9
There are a variety of fuel surge tanks and accessories available for the Evo 8/9. One option is to purchase a Fuel Surge Tank Installation Kit, which includes everything needed to install a Radium fuel surge tank with a single 39mm fuel pump. This kit is designed for a Mitsubishi Lancer Evolution 8-9 and locates the FST in a collision-safe area of the trunk, allowing for the majority of the trunk space to still be usable. The kit includes components such as PTFE insulated wiring, submersible hose, aluminium mounting brackets, and stainless steel hardware.
Another option is to purchase a MAPerformance Surge Tank Kit, which is also compatible with the Evo 8/9 engine. While specific details about this kit are scarce, it is likely to include similar components to the Fuel Surge Tank Installation Kit.
Additionally, there are a number of accessories and modifications that can be made to the Evo 8/9 fuel system. For example, the OEM venturi jet pump in the return port can be modified to alleviate fuel flow restrictions and promote fuel flow back into the OEM fuel tank. This modification is noted in the instruction manual for the Evo 8/9.
Furthermore, when creating a surge tank setup, it is recommended to use the OEM tank with its pump to a surge tank in the back of the car, with 1 or 2 pumps sending to the fuel rail. The return line should then go to the surge tank, and an overflow line should be directed back to the OEM tank, accompanying the line on the passenger side.
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Frequently asked questions
Yes, the Evo 9 fuel tank fits in the Evo 8.
The fuel tank has two sections on both sides of the driveshaft. The line from the passenger side pumps fuel to the driver's side using a fuel return line that creates a vacuum in a T-connector.
The OEM Part Number for the Evo 8/9 fuel tank is 1700A025.
The setup includes a fuel pump sending unit on the driver's side and a fuel level sensor on the passenger side.
You can buy the Evo 8/9 fuel tank from online retailers such as eBay and specialist automotive stores like Ross Sport and STM Tuned.
