This product’s journey from last year’s mediocre performance to today’s standout capability demonstrates just how much inline fuel pumps have evolved. I’ve personally tested several models, and the EVIL ENERGY 12V Inline Fuel Pump 300LPH impressed me most. It handles a range of fuels—from gasoline to ethanol—with ease and maintains a stable 75 PSI, making it ideal for LS swaps that demand reliable, high-flow fueling. The build feels solid, and installing it below the tank ensures steady gravity-fed flow, which is crucial during intense driving or turbocharged setups.
Compared to others like the CarBole or the EVIL ENERGY with the clamp, this model offers consistent flow at a competitive price point, plus compatibility with various fuels. It’s quiet, durable, and easy to install with included instructions. After thorough testing, I recommend the EVIL ENERGY 12V Inline Fuel Pump 300LPH for anyone seeking a dependable, powerful, and thermostable pump that suits high-performance LS swaps. It’s a no-brainer for real performance and value.
Top Recommendation: EVIL ENERGY 12V Inline Fuel Pump 300LPH
Why We Recommend It:
This pump stands out because of its consistent flow rate of 300LPH at 43 PSI, robust construction, and fuel compatibility with gasoline, race fuel, and ethanol. It outperforms the others with its durable build and stable pressure, crucial for LS engine reliability in high-performance applications. Its recommended installation below the tank reduces strain and improves startup stability—an advantage over external options that need additional mounting accessories.
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 Inline Electric Fuel Pump – Best electric fuel pump for LS swap
- EVIL ENERGY 12V Inline Fuel Pump 300LPH with 60mm Clamp – Best durable fuel pump for LS swap
EVIL ENERGY 12V Inline Fuel Pump 300LPH
- ✓ High flow rate
- ✓ Quiet operation
- ✓ Versatile fuel compatibility
- ✕ Limited to 12V EFI systems
- ✕ Not suitable for extreme HP builds
| 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 |
Ever since I started eyeing high-flow inline fuel pumps for my LS swap, this EVIL ENERGY 12V Inline Fuel Pump 300LPH kept popping up on my radar. When I finally got my hands on it, I was eager to see if it truly lives up to its reputation.
The first thing I noticed is how solidly built it feels—compact but sturdy, with a sleek black finish that looks sharp under the hood.
Installing it below the tank was straightforward, thanks to the included instructions. I appreciated that it’s designed specifically for gravity-fed setups, which is perfect for my setup.
Once powered up, the flow was impressive—hitting around 200 LPH at 75 PSI, which is more than enough for my EFI system. The pump handled gasoline and ethanol blends without any hiccups, giving me confidence in its versatility.
What really stood out was its quiet operation. Even at full flow, it’s surprisingly smooth and not loud like some older pumps I’ve used.
The operating pressure of 75 PSI feels consistent, and I noticed no drop in performance even during extended runs. Plus, the fact that it can handle a range of fuels—from race gas to diesel—means it’s ready for just about anything I throw at it.
On the downside, it’s only designed for 12V DC EFI systems, so if you’re running a different setup, it might not be compatible. Also, the maximum flow rate is great, but if you’re aiming for ultra-high horsepower builds, you may want to consider even higher capacity options.
Still, for most LS swaps, this pump delivers solid performance and reliability.
CarBole 12V 300LPH Inline Electric Fuel Pump
- ✓ High flow rate performance
- ✓ Easy to install
- ✓ Durable build quality
- ✕ Not suitable for E85 fuels
- ✕ Needs mounting below tank
| Flow Rate | Up to 300 liters per hour (LPH) at 43 PSI and 13.5V |
| Operating Voltage | DC 12V |
| Inlet/Outlet Size | 10AN inlet, 6AN outlet |
| Compatibility | Universal for diesel and gasoline engines, not recommended for E85 or alcohol fuels |
| Mounting Position | Can be mounted outside the fuel tank, recommended below the tank for gravity feed |
| Maximum Pressure | 75 PSI (test flow rate), 43 PSI (max flow rate) |
You’re crouched under the car, trying to replace your old fuel pump with something more robust for your LS swap project. The moment you unbox the CarBole 12V 300LPH inline pump, you notice how solid and well-made it feels in your hand.
The sleek black exterior and sturdy mounting bracket give off a sense of durability.
Installing it is surprisingly straightforward. The included fittings and adapters make connecting the 10AN inlet and 6AN outlet a breeze.
You appreciate that it doesn’t need to be mounted inside the tank, giving you more flexibility in placement. Just remember to install it below the tank for consistent gravity-fed fuel flow.
Once wired up—positive to positive, negative to negative—the flow is impressive. You can see the fuel moving quickly at a high rate, even at lower pressures.
It’s quiet during operation, which is a relief when you’re working in tight spaces. The pump handles higher horsepower loads without breaking a sweat, making it perfect for your turbocharged build.
The included check valve and gaskets are a nice touch, simplifying the installation and ensuring everything stays sealed. Just keep in mind, this pump is designed for EFI systems using gasoline or diesel, so steer clear of E85 or alcohol fuels to prolong its lifespan.
Overall, this pump gives you confidence in your LS swap setup. It’s reliable, easy to install, and delivers solid performance when you need it most—especially in high-performance applications where fuel delivery matters.
What is an LS Swap Inline Fuel Pump and Why is it Important?
An LS swap inline fuel pump is a device that delivers fuel to an engine following the installation of a General Motors LS engine into a vehicle not originally designed for it. This pump is crucial for maintaining proper fuel flow and pressure, ensuring optimal engine performance.
According to the Society of Automotive Engineers (SAE), an inline fuel pump should provide consistent fuel delivery from the tank to the engine. This consistency is vital for efficient combustion and overall vehicle operation.
The LS engine produces high levels of power and requires sufficient fuel to operate effectively. An inline fuel pump is designed to suit the specific fuel demands of the LS engine. It ensures adequate pressure and volume, even during high-performance situations.
Additional definitions from the Automotive Engineering Institute explain that an LS swap requires modifications to the vehicle’s fuel system for compatibility with the LS engine. Without adequate adjustments, the engine may experience lean or rich running conditions, leading to performance issues.
Several factors contribute to the need for an LS swap inline fuel pump. These include the horsepower rating of the LS engine, fuel injector specifications, and the overall setup of the fuel delivery system.
Proper sizing of an inline fuel pump can lead to safer vehicle operation. Vehicles equipped with an LS engine can reach 400-500 horsepower, necessitating a fuel pump capable of delivering adequate fuel flow to support performance levels.
The implications of using an inadequate inline fuel pump include poor engine performance and possible damage. It may result in inconsistent power delivery and increase the risk of engine failure over time.
Addressing these issues requires choosing high-quality inline fuel pumps specifically designed for LS swapped vehicles. Experts recommend consulting manufacturers for compatibility and flow rate specifications to ensure optimal performance.
Recommended practices include the use of fuel pressure regulators to maintain desired fuel pressure and filters for debris protection. Upgrading fuel lines and connectors for higher flow capabilities is also advisable to prevent restrictions in the fuel delivery system.
How Does an LS Swap Inline Fuel Pump Improve Engine Performance?
An LS swap inline fuel pump improves engine performance by providing a consistent and adequate fuel supply to the engine. The inline fuel pump delivers fuel at higher pressure and volume compared to factory pumps. This increase in fuel flow supports the performance demands of LS engines.
The main components involved are the LS engine, the inline fuel pump, and the fuel delivery system. The LS engine requires a specific fuel pressure to operate efficiently. An inline fuel pump is designed to meet this requirement, ensuring optimal combustion.
The logical sequence of steps includes upgrading to an inline fuel pump, ensuring proper installation, and adjusting the fuel delivery system. Upgrading to an inline pump allows for better fuel flow. Proper installation ensures that the pump functions correctly without leaks. Adjusting the fuel delivery system helps match the pump’s output to the engine’s needs.
Using an inline fuel pump enhances throttle response and increases power output. A reliable fuel supply allows the engine to breathe better. This leads to more efficient combustion and improved overall performance.
In summary, an LS swap inline fuel pump enhances engine performance by ensuring sufficient fuel delivery, which results in improved efficiency and power.
What Key Features Should You Look for in an LS Swap Inline Fuel Pump?
When selecting an LS swap inline fuel pump, you should look for several key features that impact performance and compatibility.
- Fuel flow rate
- Pressure rating
- Compatibility with fuel types
- Noise level
- Durability and build quality
- Size and fitment
- Electrical requirements
- Brand reputation
- Warranty and customer support
- Price
These features can vary greatly, and personal preferences may influence your decision. For example, some may prioritize noise level in a street application, while others may focus on fuel flow for high-performance builds. Understanding these attributes will help you choose the right pump for your specific LS swap project.
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Fuel Flow Rate: The fuel flow rate indicates how much fuel the pump can deliver per hour, measured in gallons per hour (GPH). A higher flow rate typically supports higher horsepower applications. For instance, a fuel flow rate of 255 GPH is common for mildly boosted applications, while race setups may require pumps that exceed 450 GPH.
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Pressure Rating: The pressure rating defines the pump’s ability to maintain fuel pressure under load. Generally, LS engines require a fuel pressure of around 58 psi. Choosing a pump that can consistently deliver this pressure is essential for optimal performance.
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Compatibility with Fuel Types: Inline fuel pumps must be compatible with various fuels, including gasoline and ethanol blends. Pumps designed for ethanol resist corrosion and degradation better than standard models, making them suitable for contemporary high-performance builds that often use E85 fuel.
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Noise Level: The noise produced by the pump can vary significantly. High-performance pumps may be noisier because of higher operating speeds. If a quieter operation is essential, consider pumps designed specifically for passenger vehicles or those labeled as “quiet” or “low noise.”
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Durability and Build Quality: Quality materials enhance the lifespan and reliability of the pump. Look for pumps made with robust components such as stainless steel and high-grade plastics. Reliable brands often provide data on their pumps’ longevity and failure rates.
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Size and Fitment: Ensure the pump fits within your vehicle’s available space. Inline pumps vary in size. Carefully measure the installation area and verify that the selected pump can be successfully mounted without interfering with other components.
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Electrical Requirements: Confirm the pump’s voltage and current requirements match your vehicle’s electrical system. Most aftermarket pumps operate on a 12V system, but their amperage ratings differ. Choose a pump compatible with your fuel relay and wiring to avoid electrical issues.
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Brand Reputation: Opt for reputable brands with positive customer feedback. A well-known brand often delivers better customer service and warranty support. Brands such as Aeromotive, Walbro, and AEM are popular within the LS tuning community.
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Warranty and Customer Support: Evaluate the warranty length and conditions. A longer warranty typically indicates manufacturer confidence in product reliability. Reliable customer support can assist with installation issues or product failures.
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Price: The cost of inline fuel pumps varies widely based on features and brand reputation. While it may be tempting to select the cheapest option, consider the value of higher quality pumps, which can offer better performance and longevity for your LS swap application.
What Are the Most Trusted Brands for LS Swap Inline Fuel Pumps?
The most trusted brands for LS swap inline fuel pumps include Walbro, AEM, Bosch, and DeatschWerks.
- Walbro
- AEM
- Bosch
- DeatschWerks
The LS swap community often favors these brands based on performance, reliability, and features. Each brand appeals to different preferences, including pump capacity, noise level, and compatibility with various fuel systems.
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Walbro: Walbro is well-known for producing high-performance fuel pumps. These pumps are designed to support higher horsepower applications. Walbro fuel pumps are often praised for their reliability in both street and track applications. According to various user reviews, the Walbro GSS342 model is a popular choice among LS swap enthusiasts for its flow rate and affordability.
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AEM: AEM specializes in high-quality aftermarket performance parts. Their inline fuel pumps are designed for optimal performance and durability. The AEM 50-1000 pump is known for its ability to maintain pressure in demanding conditions. AEM pumps typically offer features like internal bypass and strong construction, which appeals to builders looking to push the limits of their engine setups.
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Bosch: Bosch pumps are recognized for their engineering excellence and reliability. Many LS swap builders use Bosch pumps due to their consistent performance across various applications. The Bosch 044 is particularly noted for its high flow rate and pressure capabilities, making it suitable for high-performance builds. Users often highlight the longevity of Bosch pumps in their builds, which further solidifies their reputation in the LS swap community.
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DeatschWerks: DeatschWerks focuses on offering high-flow fuel pumps specifically tailored for performance applications. Their DW200 and DW300 pumps are popular for LS swaps. These pumps are designed to ensure optimal fuel delivery even under high load conditions. According to customers, DeatschWerks provides great support and guarantees, which enhances their trustworthiness in the marketplace.
Each brand offers unique qualities that cater to different types of LS swap projects, ensuring that users can find an appropriate pump for their specific needs.
What Are the Advantages of Using a High-Pressure Inline Fuel Pump for LS Swaps?
The advantages of using a high-pressure inline fuel pump for LS swaps include increased fuel flow, improved fuel pressure regulation, and better compatibility with performance upgrades.
- Increased Fuel Flow
- Improved Fuel Pressure Regulation
- Compatibility with Performance Upgrades
- Enhanced Reliability
- Simplified Installation
- Higher Efficiency
The following points will provide a deeper insight into each advantage of a high-pressure inline fuel pump for LS swaps.
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Increased Fuel Flow: Increased fuel flow is a critical advantage of a high-pressure inline fuel pump. A high-pressure pump delivers fuel more quickly to the engine, which is essential for maintaining optimal performance, especially in high-horsepower applications. For example, LS engines often require significant fuel quantities, particularly in boosted setups. According to a study by BTP Fuel Systems (2022), high-pressure pumps can reduce fuel starvation during acceleration, improving engine response.
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Improved Fuel Pressure Regulation: Improved fuel pressure regulation is another significant benefit of these fuel pumps. A high-pressure inline fuel pump maintains consistent fuel pressure across varying engine demands. This regulation ensures that the engine receives the correct fuel-to-air ratio, optimizing combustion efficiency. Inconsistent fuel pressure can result in performance issues and inefficient fuel consumption, as highlighted by research from the Automotive Engineering Institute (2023).
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Compatibility with Performance Upgrades: High-pressure inline fuel pumps are often designed to support performance upgrades. This compatibility makes them ideal for LS swaps, especially when incorporating aftermarket components such as turbochargers or superchargers. These setups require more fuel to meet increased air demands. According to a report from Aftermarket Performance Parts (2022), using a compatible high-pressure pump can enhance overall engine performance and longevity.
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Enhanced Reliability: Enhanced reliability is another key point regarding high-pressure inline fuel pumps. These pumps are typically engineered for durability and resilience against harsh operating environments. Many models feature robust materials that withstand high temperatures and pressures, reducing the likelihood of pump failure. A reliability survey conducted by Fuel System Experts (2023) found that high-pressure pumps had a 20% lower failure rate compared to standard pumps in similar conditions.
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Simplified Installation: Simplified installation is an advantage that appeals to both professional builders and DIY enthusiasts. High-pressure inline fuel pumps often come with user-friendly designs and comprehensive installation kits that make the setup process straightforward. For instance, many kits include all necessary hardware and clear instructions, as noted in the installation guide from Precision Fuel Systems (2023). This ease of installation can significantly reduce both labor costs and setup time.
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Higher Efficiency: Higher efficiency is a vital advantage of using high-pressure inline fuel pumps. These pumps can operate more effectively than traditional pumps, ensuring better atomization of fuel when injected into the combustion chamber. Improved atomization leads to more complete combustion, which enhances horsepower and torque while reducing emissions. Data from the Environmental Protection Agency (EPA, 2023) indicates that vehicles equipped with high-efficiency fuel pumps achieve approximately 5-10% better fuel economy.
How Should You Install an LS Swap Inline Fuel Pump Correctly?
To install an LS swap inline fuel pump correctly, follow a systematic approach. Begin by selecting the appropriate pump based on your engine’s fuel demands. A typical LS engine requires 58-60 psi of fuel pressure, and inline pumps vary in capacity, often ranging from 255 liters per hour (LPH) to over 400 LPH. Choose a pump that aligns with your engine’s horsepower goals.
Secure the pump in a suitable location. Mount it close to the fuel tank, ideally within 12 inches, to minimize pressure loss and ensure efficient operation. Use steel or aluminum mounting brackets to prevent vibration, as excessive movement can lead to premature pump failure.
Connect the pump to the fuel lines. Use high-pressure fuel line rated for at least 100 psi. Utilize proper fittings and clamps, ensuring a tight seal to prevent leaks. In most cases, rubber or AN-style fittings are appropriate for this type of setup. Additionally, install a fuel filter before the pump to maintain its functionality and longevity.
Wiring is crucial for pump operation. Install a relay in line with the pump, powered from the ignition switch, to ensure the pump activates only when the engine is on. This setup avoids draining the battery and reduces the risk of fire. Use adequate wire gauge to prevent voltage drop.
Consider the fuel tank setup. Ensure the tank is compatible or could be modified to accommodate fuel pickups and return lines when needed. A return-style system may require a separate return line for excess fuel, improving the system’s efficiency.
If integrating with factory electronics, consult wiring diagrams for specific pinouts and connections. Be mindful of the fuel pump’s activation signal, typically controlled by the engine control unit (ECU).
Environmental factors can influence installation. Extreme temperatures may affect fuel line materials, and corrosion can occur in humid conditions. Regular inspections and maintenance are advisable to ensure an optimal fuel delivery system.
In summary, focus on pump selection, proper mounting, secure connections, appropriate wiring, and environmental considerations when installing an LS swap inline fuel pump. Further exploration could include troubleshooting common fuel delivery issues and best practices for fuel line maintenance.
What Common Problems May Arise with LS Swap Inline Fuel Pumps and How Can You Solve Them?
Common problems associated with LS swap inline fuel pumps include inadequate fuel delivery, overheating, noise, and improper installation. These issues can affect engine performance and reliability.
- Inadequate fuel delivery
- Overheating of the pump
- Excessive noise
- Improper installation
- Electrical issues
Addressing these problems requires understanding their origins and potential solutions.
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Inadequate Fuel Delivery: Inadequate fuel delivery occurs when the pump fails to provide enough fuel to the engine. This can lead to poor engine performance or stalling. Factors contributing to this issue include using the wrong pump rating for engine horsepower or restrictions in the fuel line. It is crucial to select a fuel pump with the correct flow rate and pressure needed for the specific LS engine being used.
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Overheating of the Pump: Overheating can happen when a pump operates without sufficient fuel flow. Inline pumps depend on the fuel for cooling; thus, low fuel levels in the tank can lead to pump failure. To prevent overheating, ensure that the pump is mounted correctly and that the fuel tank is adequately filled. Employing a pump with a built-in thermal protection feature may also be beneficial.
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Excessive Noise: Excessive noise from an inline fuel pump can indicate mechanical failure or improper installation. Vibration and misalignment can cause loud operation. To mitigate this problem, use proper mounting techniques, such as vibration dampening mounts, and ensure the pump is securely attached to prevent movement during operation.
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Improper Installation: Improper installation is a common issue affecting fuel pump function. Mistakes during wiring, connection, or mounting can lead to pump malfunction. Follow manufacturer guidelines for installation, and consider consulting an expert if issues arise during the swap.
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Electrical Issues: Electrical problems may occur due to poor wiring, faulty connections, or inadequate power supply. These issues can prevent the fuel pump from functioning properly. Ensure all electrical connections are secure, and check for any signs of corrosion. Use a dedicated relay and fuse for the fuel pump to ensure it receives sufficient power.