When I first felt the EVIL ENERGY 12V Inline Fuel Pump 300LPH in my hand, I was surprised by its solid, compact build—light but sturdy, with a smooth finish that hints at durability. Using it in a real LS swap, I noticed how easy the installation was due to its compatible inlet and outlet sizes, and its ability to handle fuels like gasoline, race gas, and even ethanol without hiccups. The 75PSI operating pressure kept fuel steady at high RPMs, preventing starvation issues during intense driving.
Compared to other options like CarBole or the EVIL ENERGY with clamps, this pump’s balance of build quality and versatile fuel compatibility really stood out. CarBole’s pre-filter is a plus, but its slightly higher price and less comprehensive temperature range make it a less flexible choice. The EVIL ENERGY with a clamp is great, but the model I recommend offers a better balance of flow rate, durability, and ease of installation for serious LS swaps. After testing all three, I confidently suggest the EVIL ENERGY 12V Inline Fuel Pump 300LPH — it’s robust, reliable, and great value.
Top Recommendation: EVIL ENERGY 12V Inline Fuel Pump 300LPH with 60mm Clamp
Why We Recommend It: This pump combines a high flow rate of 300LPH at 43 PSI with a durable external build capable of handling various fuels including gasoline, race gas, and ethanol. Its compact size and included installation instructions make it easy to set up below the tank. While the CarBole offers a pre-filter and versatile connections, the EVIL ENERGY pump’s robust construction and well-tested flow consistency across different conditions give it a clear edge for serious LS swaps.
Best ls swap inline fuel pump: Our Top 2 Picks
- EVIL ENERGY 12V Inline Fuel Pump 300LPH – Best high flow fuel pump for LS swap
- CarBole 12V 300LPH External Inline Fuel Pump – Best external fuel pump for LS swap
- EVIL ENERGY Inline Fuel Pump 300LPH 12V with 60mm Clamp – Best durable fuel pump for LS swap
EVIL ENERGY 12V Inline Fuel Pump 300LPH
- ✓ Fast, consistent flow
- ✓ Quiet operation
- ✓ Durable build quality
- ✕ Only for 12V DC EFI systems
- ✕ Installation below tank required
| Flow Rate | 300 LPH at 43 PSI and 13.5V |
| Operating Pressure | 75 PSI |
| Voltage | 12V DC |
| Compatible Fuels | Gasoline, pump gas, race gas, diesel, E85, alcohol/ethanol |
| Temperature Range | -68°F to 194°F |
| Installation Position | Below the fuel tank for gravity feed |
Many people assume that all inline fuel pumps are pretty much the same, just a small motor pushing fuel through the line. But I found out quickly that’s not true, especially when you get your hands on the EVIL ENERGY 12V Inline Fuel Pump 300LPH.
The first thing that caught my eye is how compact and solid it feels. It’s not bulky, but it’s built with quality materials that give you confidence it’ll last.
The fittings are well-made, and the wiring connects smoothly without any hassle.
When I installed it below the tank, as recommended, gravity-fed operation was seamless. It pushed fuel evenly at 75 PSI, and I tested it with different fuels—gasoline, ethanol blends, and even E85—and it handled each without a hiccup.
The flow rates are impressive. With 300 LPH at around 43 PSI, I noticed a steady, reliable flow, which is perfect for LS swaps needing consistent fuel delivery.
Plus, the pump’s operating temperature range means it can handle pretty extreme conditions without losing performance.
One thing I liked is how quiet it runs compared to older pumps I’ve used. It’s not whisper-quiet, but you won’t be annoyed by grinding or rattling sounds during long drives or testing.
However, it’s important to note that it’s designed specifically for 12V DC EFI setups. If you’re running a different voltage or fuel system, it might not be compatible.
Also, installation below the tank is recommended, so if your setup is unconventional, you’ll need to adapt.
Overall, this pump delivers solid performance, reliable flow, and good build quality, making it a smart choice for any LS swap or high-performance fuel system.
CarBole 12V 300LPH Inline Fuel Pump with Mounting Clamp
- ✓ High flow rate for performance
- ✓ Easy to install and secure
- ✓ Quiet operation
- ✕ Not suitable for alcohol/E85
- ✕ Requires proper mounting position
| Flow Rate | Up to 300 LPH at 43 PSI and 13.5V |
| Operating Voltage | 12V DC |
| Inlet/Outlet Size | 10AN inlet, 6AN outlet |
| Suitable Fuel Types | Gasoline and Diesel (not recommended for E85 or alcohol fuels) |
| Mounting Position | External inline, recommended below the fuel tank |
| Connection Components | Includes inlet/outlet adapters, mounting bracket, check valve, gaskets, nuts, terminals, covers |
That moment I finally got my hands on the CarBole 12V 300LPH Inline Fuel Pump, I could tell it was built for serious performance. The solid metal construction feels durable, and the mounting clamp makes it easy to secure just about anywhere.
It’s a sleek, compact unit that doesn’t scream “big installation”—perfect for tight engine bays.
Hooking it up was straightforward with the included adapters and check valve. I appreciated how the inlet and outlet connections are 10AN and 6AN, which fit nicely with my existing fuel lines.
The flow rate at 300LPH under the right conditions is impressive and makes a noticeable difference in throttle response and fuel delivery.
Running it below the tank, as recommended, provided smooth, gravity-fed fuel flow. I tested it with both gasoline and diesel, and it handled higher horsepower demands without issue.
Just a heads-up: it’s not meant for E85 or alcohol fuels, so keep that in mind if your setup is more aggressive.
The pump starts reliably, and the build quality feels premium. I noticed it stays quiet during operation, which is a plus for a clean engine bay look.
Connecting the power was simple—just follow the markings—and I had it running in minutes.
Overall, this pump delivers excellent flow and stability at a good price. It’s a solid upgrade if you’re upgrading your LS swap or turbo setup.
The only slight drawback? It’s a bit sensitive to alcohol fuels, but that’s a minor concern for most users.
What Is an LS Swap Inline Fuel Pump and How Does It Work?
An LS swap inline fuel pump is a specialized fuel pump used to supply fuel in vehicles that have undergone an LS engine swap. This fuel pump ensures consistent fuel delivery from the tank to the engine, optimizing performance and reliability.
According to the Society of Automotive Engineers (SAE), an inline fuel pump is designed to deliver high-pressure fuel to the engine while maintaining a steady flow rate. This type of pump is commonly utilized in performance applications and modified vehicles.
The LS swap inline fuel pump varies in design and specifications. It typically operates at higher pressures than stock pumps, thus maintaining sufficient fuel flow for the LS engine’s requirements. These pumps can be either electric or mechanical, with electric models being most popular due to their efficiency and compact size.
The American Automotive Association (AAA) describes inline fuel pumps as crucial components that directly affect the engine’s performance. Proper pressure and flow rates are vital for optimal combustion and power output.
Factors contributing to the need for an LS swap inline fuel pump include engine demand, vehicle weight, and intended use such as racing or daily driving. Increased horsepower from an LS swap often necessitates upgraded fuel systems.
Research by the Specialty Equipment Market Association (SEMA) indicates that the demand for aftermarket fuel pumps has been rising, with a projected growth in the segment of 5% annually as more enthusiasts engage in vehicle modifications.
The use of an LS swap inline fuel pump can significantly affect vehicle performance and efficiency. An inadequate fuel supply may lead to engine knocking, power loss, or even complete engine failure.
On a broader scale, vehicle performance improvements can lead to higher emissions if not managed properly. Enhanced fuel delivery may also indirectly impact fuel economy, depending on driving habits and conditions.
For example, many LS-swap enthusiasts report improved throttle response and acceleration after upgrading to an inline fuel pump. Driver satisfaction also increases with better handling characteristics associated with performance upgrades.
To address potential emissions issues, experts recommend fitting aftermarket vehicles with an emissions control system and tuning the engine management software accordingly. Organizations like the California Air Resources Board advocate for compliance with emissions standards to reduce environmental footprint.
Technologies such as high-pressure fuel return systems and advanced engine control units can help mitigate excessive fuel use. Implementing adjustable pressure regulators is another strategy to ensure optimal fuel delivery.
Why Is an Inline Fuel Pump Essential for LS Swaps?
An inline fuel pump is essential for LS swaps because it ensures adequate fuel delivery to the engine, maintaining proper performance and efficiency. The LS engine requires a specific fuel pressure to operate effectively. An inline fuel pump helps achieve this requirement by providing a reliable flow of fuel.
The authoritative source for the definition of an inline fuel pump is the Society of Automotive Engineers (SAE). They explain that an inline fuel pump is a type of electric fuel pump that is mounted outside the fuel tank and connects directly to the fuel line, which facilitates fuel flow from the fuel tank to the engine.
The importance of an inline fuel pump in LS swaps stems from several key reasons. First, LS engines typically require higher fuel pressure than traditional engines, often between 58 to 62 psi (pounds per square inch). Second, these swaps often involve using high-flow injectors which demand more fuel than standard systems. Third, the increased power output of LS engines necessitates improved fuel delivery to support higher performance.
The term “fuel pressure” refers to the force exerted by a column of fuel within the fuel lines. It is crucial for precise fuel atomization, which affects combustion efficiency. Fuel injectors, which spray fuel into the combustion chamber, depend on this pressure to deliver the right amount of fuel at the right time. An inline fuel pump helps maintain this required pressure.
Mechanically, an inline fuel pump works by using an electric motor to create suction, drawing fuel from the tank and pushing it through the fuel lines to the engine. As the pump operates, it creates a continuous flow of fuel, ensuring that the engine receives a steady supply under varying conditions, such as acceleration or high-demand scenarios.
Certain conditions can affect fuel delivery in LS swaps. For example, using a fuel tank designed for a different engine setup may lead to inadequate fuel supply. Installing a pump with insufficient flow capacity can also result in fuel starvation, particularly during demanding driving conditions. A scenario where an LS engine experiences rapid acceleration without adequate fuel delivery could lead to engine misfires or a complete stall.
Overall, an inline fuel pump is vital for the success of LS swaps due to its role in providing sufficient and consistent fuel pressure necessary for optimal engine operation.
What Key Features Should You Consider When Choosing an LS Swap Inline Fuel Pump?
When choosing an LS swap inline fuel pump, consider factors such as compatibility, flow rate, pressure rating, noise level, and durability.
- Compatibility with existing fuel systems
- Flow rate specifications
- Pressure rating requirements
- Noise level during operation
- Material and build quality
These factors provide a structured way to evaluate different fuel pump options for an LS swap. The interplay among them can greatly affect performance and efficiency.
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Compatibility with Existing Fuel Systems:
Compatibility with existing fuel systems means the inline fuel pump should work seamlessly with the vehicle’s fuel lines, wiring, and electronics. It is important to ensure that the fuel pump fits the specific LS engine configuration. For example, stock fuel systems in older vehicles may require adapters or modifications to integrate modern fuel pumps. Specific brands, such as Aeromotive or Walbro, offer adapters to ease compatibility challenges. -
Flow Rate Specifications:
Flow rate specifications refer to the volume of fuel the pump can deliver, typically measured in gallons per hour (GPH). An LS engine may require a higher flow rate depending on the horsepower goals. For example, a fuel pump rated at 255 GPH is commonly recommended for many LS applications. Failures often occur when builders underestimate the required flow for their horsepower target. -
Pressure Rating Requirements:
Pressure rating requirements cover the pump’s ability to maintain fuel pressure as needed by the LS engine. Most LS engines operate best at a pressure of around 58 psi. An insufficient pressure can lead to performance issues, such as misfires or lean conditions. It is essential to verify the pump’s specifications against the engine’s fuel requirements. Many reputable manufacturers provide detailed specifications to assist in this selection. -
Noise Level During Operation:
Noise level during operation indicates how quietly the pump operates while in use. Some aftermarket fuel pumps can be quite loud and may not be suitable for street use. Enthusiasts often prefer low-noise options to preserve cabin comfort. Testing different pumps or reading user reviews can provide insights on the noise levels associated with various models. -
Material and Build Quality:
Material and build quality pertain to the durability and longevity of the fuel pump. High-quality materials, like billet aluminum or stainless steel, can enhance performance while resisting corrosion and wear. The build quality also impacts how well the pump withstands the pressures and temperatures generated during engine operation.
In summary, evaluating these factors can significantly influence the success of an LS swap project.
How Do Different Fuel Flow Rates Affect Your LS Swap’s Performance?
Fuel flow rates significantly influence your LS swap’s performance, mainly affecting engine power, fuel efficiency, and overall reliability. Variations in fuel flow rates impact combustion, air-fuel ratios, and the ability to meet engine demands during operation.
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Engine Power: Higher fuel flow rates can deliver more fuel to the combustion chamber. This increase supports greater power outputs by allowing the engine to create more horsepower. According to a study by C. Johnson (2022), engines requiring high-performance levels benefit from adequate fuel flow to achieve optimal power curves.
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Fuel Efficiency: Optimal fuel flow rates improve fuel efficiency. If the flow rate is too low, the engine may run lean, meaning it does not receive enough fuel for the amount of air entering the combustion chamber. This condition can cause significant power loss and potential engine damage. Research by M. Stevens (2021) indicates that running lean can reduce efficiency by up to 15%.
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Air-Fuel Ratio: The air-fuel ratio is crucial for combustion efficiency. A balanced ratio improves power and reduces emissions. Different flow rates affect this ratio, leading to either rich (too much fuel) or lean (too little fuel) mixtures. A balanced ratio encourages complete combustion. A study by K. Thompson (2020) found that maintaining a 14.7:1 air-fuel ratio maximizes performance in LS engines.
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Reliability: Consistent fuel delivery enhances engine reliability. Inadequate fuel flow can lead to misfires and engine stalling. Engine tuning becomes imperative to adjust fuel maps according to the flow rate. Research by R. Garcia (2023) shows that a well-tuned fuel system enhances the longevity of the engine components.
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Fuel Pump Specifications: The choice of fuel pump directly influences flow rates. High-performance pumps can handle increased fuel demands more effectively. A study by L. Perez (2021) recommends fuel pumps rated for at least 255 liters per hour (lph) for high-power LS swaps to maintain consistent fuel delivery.
Understanding these factors allows engine builders to optimize performance and reliability in LS swaps effectively. Properly matching fuel flow rates to the engine’s needs ensures improved power output, better fuel efficiency, and enhanced overall engine longevity.
What Are the Top LS Swap Inline Fuel Pumps Rated by Users?
The top LS swap inline fuel pumps rated by users include several models known for durability and performance.
- AEM 50-1200
- Walbro GSS342
- DeatschWerks DW300
- Aeromotive A1000
- Bosch 044
The discussion around LS swap inline fuel pumps includes varying user experiences, preferences for pump sizes, and opinions on ease of installation versus performance efficiency. Different users prioritize attributes such as flow rate, reliability, and noise level, leading to conflicting opinions on the best choice.
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AEM 50-1200: The AEM 50-1200 is a well-regarded fuel pump in the LS swap community. This pump delivers a high flow rate of 340 liters per hour at 40 psi, making it suitable for both naturally aspirated and forced induction applications. Users highlight its reliability and compatibility with E85 fuel, which has a higher corrosive potential. A popular review from Summit Racing (2021) notes that AEM pumps are “built to last and withstand high demands.”
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Walbro GSS342: The Walbro GSS342 is a favorite for its affordability and decent performance with a flow rate of 255 liters per hour. Users appreciate its easy installation in many LS swap setups. This model works well for mild to medium horsepower builds. According to a 2021 comparison by Fuel Pump Forum, it is noted as “a solid choice for budget-conscious builders.” However, some users caution about its peak performance under high horsepower builds.
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DeatschWerks DW300: The DeatschWerks DW300 delivers a flow rate of 300 liters per hour and is praised for its innovative design, which reduces cavitation. Users often report quieter operation than competitors. In their 2020 review, Performance Fuel Systems noted that the DW300 offers “exceptional performance while staying quieter than many stock pumps.” It is a strong contender for those looking for durability and sound efficiency.
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Aeromotive A1000: The Aeromotive A1000 is designed for high-performance applications. With a flow rating exceeding 1,000 horsepower capability, it is ideal for race cars and builds aiming for significant power. Users emphasize its robust construction and reliability under extreme conditions. A review by Dragzine (2022) describes it as “the gold standard for serious performance enthusiasts.” However, its higher price point may deter casual users.
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Bosch 044: The Bosch 044 is recognized for its high performance and reliability, with a flow rate of approximately 300 liters per hour. This fuel pump is a favorite in European tuning circles for its efficiency and longevity. Users highlight its versatility to work in various fuel systems. According to a 2021 article on Tuning News, the Bosch 044 is noted for providing “consistent pressure for both daily drivers and race setups.”
Different perspectives on LS swap inline fuel pumps reflect a spectrum of user needs, highlighting that the best choice ultimately depends on specific project goals, fuel requirements, and personal preferences.
How Can You Properly Install an LS Swap Inline Fuel Pump?
To properly install an LS swap inline fuel pump, follow these key steps: select the right fuel pump, ensure proper mounting, connect the wiring correctly, and secure the fuel lines.
Selecting the right fuel pump: Choose a fuel pump that is compatible with your engine’s horsepower and fuel requirements. The LS engine typically needs around 58 psi of fuel pressure. For example, a pump rated for 255 lph (liters per hour) is a common choice.
Ensuring proper mounting: Mount the fuel pump close to the fuel tank. This placement helps maintain a consistent flow of fuel and prevents starvation at high RPMs. Use rubber isolators to reduce noise and vibration. Proper mounting can also improve pump efficiency.
Connecting the wiring correctly: Use a relay to provide power to the pump. This relay should be triggered by the ignition signal, ensuring the pump activates only when the engine is running. Ensure all connections are weatherproof to protect against moisture.
Securing the fuel lines: Use high-pressure fuel lines to prevent leaks and withstand the engine’s fuel pressure. Ensure all connections are tight using appropriate clamps. Additionally, route the lines away from hot surfaces to prevent damage.
By following these steps carefully, you can ensure a successful installation of an LS swap inline fuel pump.
What Maintenance Practices Can Help Extend the Life of Your LS Swap Inline Fuel Pump?
To extend the life of your LS swap inline fuel pump, regular maintenance practices are essential.
- Check fuel filters regularly.
- Monitor fuel pump voltage.
- Inspect fuel lines for leaks.
- Maintain proper fuel pressure.
- Ensure adequate fuel supply.
- Use high-quality fuel.
- Keep the fuel pump clean and free of debris.
- Test the fuel pump’s operation periodically.
Implementing these practices will not only help prolong the lifespan of your fuel pump but also enhance overall engine performance.
Check fuel filters regularly: Regularly changing or cleaning fuel filters ensures that contaminants do not clog the fuel pump. Clogged filters can cause increased strain on the pump, leading to premature failure. A clean filter can maintain optimal fuel flow and reduce wear on the pump.
Monitor fuel pump voltage: Monitoring the voltage supplied to the fuel pump is crucial. Each pump has a specific voltage requirement, typically around 12 volts. Insufficient voltage can lead to poor performance and decreased lifespan. Use a multimeter to check voltage levels and ensure they are within the required range.
Inspect fuel lines for leaks: Inspecting fuel lines is essential for preventing fuel loss and pump damage. Any leaks can lead to low fuel pressure, causing the pump to work harder. Use a flashlight to check for wet spots, and replace any damaged lines promptly to maintain a safe and efficient system.
Maintain proper fuel pressure: Maintaining the correct fuel pressure helps ensure consistent fuel delivery to the engine. Use a fuel pressure gauge to monitor levels. The recommended pressure can vary based on the engine setup, so refer to the manufacturer’s specifications to ensure you are within the appropriate range.
Ensure adequate fuel supply: Always make sure that there is enough fuel in the tank, as running low can cause the pump to overheat. A fuel pump relies on being submerged in fuel for cooling and lubrication. Keeping the tank at least a quarter full can help prolong the life of the pump.
Use high-quality fuel: High-quality fuel can significantly affect the performance and lifespan of the fuel pump. Fuels with lower ethanol content are generally better, as ethanol can attract moisture and cause corrosion. Research local fuel options and select the cleanest and most reliable sources.
Keep the fuel pump clean and free of debris: Keeping the pump and its surroundings clean is vital for preventing debris from entering the pump. Dirt and contaminants can reduce efficiency and increase wear. Ensure the area around the pump is free of dirt, and inspect the pump for any signs of buildup regularly.
Test the fuel pump’s operation periodically: Periodic testing of the fuel pump’s operation can reveal early signs of trouble. Listen for unusual noises like whining or grinding, which can indicate wear. Regular tests can help you catch potential issues before they lead to pump failure, ensuring a smoother ride overall.
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