So, you have decided to switch to an electric fuel pump, selecting the best pump that fits within your budget is important. Buying the most inexpensive pump available may sound like a good idea at first but can be detrimental in the long run. Additionally, you should ensure that the fuel pump selected contains an internal check valve to keep fuel from bleeding back into the tank which will reduce initial crank time and decrease wear and tear on the fuel injection system. For an in-line electric fuel pump location is important to consider no matter what type of fuel system you are modifying. It is important to choose a location where the performance integrity of the in-line pump will not be compromised from chassis flex, potentially causing fuel lines to break, or become disconnected or from road debris damage. Choose an in-line electric fuel pump mounting position as close to the fuel tank as possible to improve fuel pumping efficiency.
Inline and in-tank electric fuel pumps are two different types of fuel pumps commonly used in automotive fuel delivery systems.
Reasons To Switch to an Electric Fuel Pump
- Ease of accessibility for installation and serviceability – You may have a modified or custom fuel system that requires semi-regular removal of the fuel pump for testing or maintenance.
- Increased pump performance is required– Sometimes, after engine modifications, a stock pump may no longer provide the performance required to keep up.
- You want the consistency and performance of an electric pump by switching from a mechanical pump – Your car may have a stock mechanical pump driven from the engine, but your stock tank is not designed to accommodate an in-tank pump.
- We do not all have large project car budgets – Most project cars are hobbies, which means that spending can be limited to a restrictive household budget.
Here are the main differences between them:
Location of Electric Fuel Pumps:
- In-Line Fuel Pump: An inline fuel pump is installed outside the fuel tank, typically along the fuel line between the fuel tank and the engine. It is mounted somewhere along the chassis or under the vehicle.
- In-Tank Fuel Pump: An in-tank fuel pump is submerged directly into the fuel tank, usually mounted inside a housing or module along with the fuel level sender and other components.
Fuel Pump Design:
- In-Line Fuel Pump: Inline fuel pumps are typically designed as external units that draw fuel from the tank and pump it to the engine. They may be mechanical or electric, with electric inline pumps being more common in modern vehicles.
- In-Tank Fuel Pump: In-tank fuel pumps are specifically designed to operate submerged in fuel. They are typically electric and have a different construction compared to inline pumps to withstand immersion and fuel vapors.
Installation of Electric Fuel Pumps:
- In-Line Fuel Pump: Installing an inline fuel pump usually involves cutting into the fuel line and splicing the pump into place. This installation method can be more labor-intensive and may require additional fittings and connectors.
- In-Tank Fuel Pump: In-tank fuel pumps are installed by accessing the fuel tank, removing the fuel pump module assembly, and replacing it with a new unit. This installation method can be more complex and may require removing the fuel tank from the vehicle.
Fuel Delivery:
- In-Line Fuel Pump: Inline fuel pumps push fuel along the fuel line to the engine. They are typically used in applications where the fuel tank is located relatively close to the engine.
- In-Tank Fuel Pump: In-tank fuel pumps push fuel from the bottom of the fuel tank to the engine. They are often used in applications where the fuel tank is located farther away from the engine, as they can provide more consistent fuel pressure and flow.
Noise and Heat:
- In-Line Fuel Pump: Inline fuel pumps may produce more noise and heat compared to in-tank pumps, as they are often located closer to the passenger compartment and engine.
- In-Tank Fuel Pump: In-tank fuel pumps are submerged in fuel, which helps dampen noise and dissipate heat more effectively. They are generally quieter, and cooler compared to inline pumps.
Finally
In summary, making the change to an electric fuel pump may require a complete fuel system overhaul and it is important to consider all the variables required to make such a switch. Overall, the choice between an in-line and in-tank electric fuel pump depends on factors such as vehicle design, space constraints, fuel system requirements, and personal preference. Both types of fuel pumps have their advantages and disadvantages, and the best option will vary depending on the specific needs of the vehicle and the driver. Keep in mind every swap will be slightly different with the vehicle and the parts you select for your application.
