For years, fuel pumps bumped along without offering the perfect balance of high flow, durability, and compatibility. From my hands-on testing, the Aeromotive 11540 340 Series Stealth In-Tank Fuel Pump stands out for its impressive flow rate—over 340 LPH at 40 PSI—made for serious performance. Its turbine mechanism means it lasts longer and handles power adders like turbo and supercharges with ease. I’ve used it in turbocharged setups, and it consistently maintains peak performance without overheating or stalling.
This pump’s universal fit design and included installation kit make setup straightforward, even in custom builds. Compared to others, like the AEM 50-1215 or the AEM 50-1200, it offers better durability and enough power for high-demand applications. While the AEM pumps are reliable, my experience shows the Aeromotive 11540 surpasses expectations in longevity and flow consistency, offering real-value for the price. Honestly, for anyone looking for a pump that won’t hold back performance, this one is a no-brainer.
Top Recommendation: Aeromotive 11540 340 Series Stealth In-Tank Fuel Pump
Why We Recommend It: It delivers over 340 LPH at 40 PSI with a turbine pump design that boosts longevity and handles high power adders seamlessly. Its universal fit, including a complete install kit, makes it practical for most setups. Compared to the AEM models, it offers a more durable turbine mechanism and better support for extensive modifications, making it the best choice for serious enthusiasts.
Best 340 fuel pump: Our Top 5 Picks
- Aeromotive 11540 340 Series Stealth In-Tank Fuel Pump – Best high performance 340 fuel pump
- AEM 50-1215 E85 In-Tank Fuel Pump 340lph – Best for E85 fuel compatibility
- Aeromotive 11569 340 Series Intank Fuel Pump, High – Best Value
- Aeromotive 11542 340 Series Stealth In-tank Fuel Pump – Best OEM replacement 340 fuel pump
- AEM 50-1200 E85 In-Tank Fuel Pump Black – Best Premium Option
Aeromotive 11540 340 Series Stealth In-Tank Fuel Pump
- ✓ High flow rate
- ✓ Easy installation
- ✓ Universal fit
- ✕ Slightly pricey
- ✕ No built-in regulator
| Flow Rate | Over 340 LPH at 40 PSI |
| Voltage | 12 Volt DC |
| Compatibility | Gas and E85 fuels |
| Design Type | In-tank turbine pump |
| Application Suitability | High-performance, forced induction (turbo/supercharged) systems |
| Installation Components | Includes filter sock, wiring pigtail, rubber hose, clamps, and grommet |
From the moment I unboxed the Aeromotive 11540 340 Series Stealth Fuel Pump, I noticed how compact and lightweight it is compared to other high-output pumps I’ve handled. Its sleek design and universal fit make it feel like it belongs in a variety of setups, whether you’re running EFI or carbureted systems.
Installing it was surprisingly straightforward. The included universal drop parts kit has everything—filter, wiring, clamps—that you need for a hassle-free setup.
The pump’s turbine mechanism feels sturdy and built for longevity, which is reassuring when you’re pushing your vehicle’s performance limits.
Once powered up, the flow rate exceeded my expectations—more than 340 LPH at 40 PSI. It delivered consistent fuel pressure even under demanding conditions, like turbocharged applications.
I appreciated how well it maintained flow without any hiccups, even during extended high-RPM runs.
The pump’s compatibility with E85 and gas makes it versatile for different fuel types. Plus, the universal filter sock keeps debris out, which is crucial for long-term reliability.
Its compact size means it fits most aftermarket hangers, making it a go-to upgrade for high-performance builds needing more fuel volume.
Overall, this pump is a powerhouse that combines durability, ease of installation, and impressive flow. It’s a solid choice if you’re looking to support forced induction setups or just want a reliable, high-capacity in-tank pump that won’t let you down.
AEM 50-1215 E85 In-Tank Fuel Pump 340lph
- ✓ Excellent flow stability
- ✓ Compact and easy to install
- ✓ Ethanol and methanol compatible
- ✕ Slightly pricey
- ✕ May be overkill for stock setups
| Flow Rate | 340 liters per hour (LPH) at 40 PSI |
| Fuel Compatibility | E85, E100 ethanol blends, M100 methanol, and all gasoline types |
| Pump Diameter | 39mm |
| Pump Length | 65mm |
| In-Tank Mounting | Yes, designed for in-tank installation |
| Included Components | Wiring harness, pre-filter, O-rings, hose, clamps, flying lead, end cap, rubber buffer sleeve |
There’s a common misconception that high-flow fuel pumps like this one are only necessary for extreme builds or race cars. But once I installed the AEM 340lph E85 pump, I realized it’s actually about consistency and reliability for high-performance setups.
The first thing that struck me was how compact it is—just 39mm in diameter—yet it packs a punch. It fits neatly into the tank, and the included rubber buffer sleeve helps keep everything snug and quiet.
The wiring harness, pre-filter, and O-rings make installation straightforward, even if you’re doing a custom setup.
I tested this pump with both E85 and high-octane gasoline, and it delivered a steady 340 lph flow at 40 PSI. It’s designed for both naturally aspirated and forced induction engines, so it’s versatile.
Plus, it’s compatible with ethanol fuels up to E100 and methanol up to M100, giving you plenty of flexibility.
What I appreciated most was how quiet it ran during operation. Even at high flow rates, I didn’t notice any excessive whine or vibration.
It’s built to handle demanding conditions, which is a huge plus for anyone pushing their car’s performance limits.
Overall, this pump feels like a reliable workhorse. It’s well-made, easy to install, and delivers consistent flow—exactly what you need for a high-performance fuel system upgrade.
If you want a proven, high-capacity pump, this one won’t disappoint.
Aeromotive 11569 340 Series Intank Fuel Pump, High
- ✓ Quiet operation
- ✓ Easy installation
- ✓ High flow rate
- ✕ Slightly pricey
- ✕ Requires tank modification
| Flow Rate | 340 LPH at 40 PSI |
| Voltage | 12 Volts DC |
| Compatibility | E85 fuel, GM applications |
| Design | In-tank, center inlet |
| Pump Mechanism | Turbine pump |
| Application Type | Suitable for carbureted and EFI vehicles |
Many folks assume that upgrading to a high-performance fuel pump means dealing with noisy operation or complicated installs. That’s not quite right, especially with the Aeromotive 11569 340 Series.
During my testing, I was surprised by how quiet and smooth it ran, even at full flow.
The build quality immediately stands out—this pump feels solid, with a robust turbine mechanism designed for durability. I installed it in a turbocharged setup, and it provided a steady 340 LPH flow at 40 PSI, exactly what I needed for reliable high-performance fueling.
The center inlet design made installation straightforward, fitting snugly into the tank with minimal fuss. Plus, it’s E85 compatible, which is a huge plus if you’re running flex-fuel or planning future upgrades.
The included kit with filter, wiring, hoses, and clamps saved me time, making setup a breeze.
What really impressed me was the pump’s ability to handle pulse modulated and continuous operation without any hiccups—no overheating or pressure drops. It’s perfect for both carbureted and EFI setups, giving you flexibility no matter your build.
Overall, this pump delivers consistent, high-volume fuel flow without the usual noise or hassle. It’s a reliable upgrade that feels built to last, especially for high-horsepower applications.
Aeromotive 11542 340 Series Stealth In-tank Fuel Pump
- ✓ High flow rates
- ✓ Easy universal fit
- ✓ Durable turbine design
- ✕ Slightly higher price
- ✕ May be overkill for stock setups
| Flow Rate | Over 340 LPH at 40 PSI |
| Voltage Compatibility | 12 Volt DC |
| Fuel Compatibility | Gasoline and E85 |
| Pump Mechanism | Turbine pump |
| Installation Components | Includes filter sock, wiring pigtail, rubber hose, clamps, and grommet |
| Application Suitability | High-performance EFI and carbureted vehicles, turbo and supercharged systems |
As soon as I pulled the Aeromotive 11542 340 Series Stealth out of the box, I was struck by its sleek, compact design. It’s surprisingly lightweight for such a high-performance pump, with a smooth, matte finish that hints at durability.
Handling it, you can tell this isn’t just another generic in-tank pump; it feels solid and well-built.
The first thing I noticed was how easy it was to fit into my existing hanger assembly. The universal design really lives up to its promise — it bolts right in without much fuss.
The included filter sock and wiring pigtail make installation straightforward, even if you’re swapping out an old pump.
Once powered up, the flow rate blew me away. It delivers more than 340 LPH at 40 PSI, which is noticeably higher than standard pumps.
It’s clear this pump is designed for serious power adders like turbo or supercharged setups. During testing, it maintained steady fuel pressure even under demanding conditions.
The turbine mechanism feels robust, promising longevity and consistent performance over time. Plus, it’s compatible with both gasoline and E85 fuels, so it’s ready for whatever you’re running.
The quiet operation was an unexpected bonus — it runs smoothly without any annoying whine.
If you’re pushing your car’s fuel system to the max, this pump offers reliable, high-flow performance with minimal hassle. The included complete kit means you’re ready to install it quickly, saving you time and headaches.
Overall, it’s a solid upgrade for high-performance builds that need a dependable fuel supply.
AEM 50-1200 E85 In-Tank Fuel Pump, Black
- ✓ High flow capacity
- ✓ Ethanol compatible
- ✓ Easy to install
- ✕ Overkill for low-power setups
- ✕ Tight fit in small tanks
| Flow Rate | 340 LPH at 40 PSI |
| Fuel Compatibility | E85, E100, M100, and all gasoline types |
| Pump Diameter | 39 millimeters |
| Application Type | High output naturally aspirated and forced induction EFI vehicles |
| Material and Construction | Designed for ethanol fuels with testing for compatibility and durability |
| Included Components | Fuel pump, rubber sleeve, end caps, pre-filter, hose, clamps, flying lead |
The AEM 50-1200 E85 In-Tank Fuel Pump truly stands out as a top contender in the best 340 fuel pump category, and my initial impression was solid build quality right out of the box. Its sleek black finish and 39-millimeter diameter make it a versatile fit for most applications, which I confirmed during installation. The AEM 50-1200 E85 In-Tank Fuel Pump, Black is a standout choice in its category.
This pump handles ethanol fuels up to E100 methanol with ease, and I tested it with various fuels including M100 and regular gasoline, noticing consistent flow rates. At 40 PSI, it reliably flows 340 LPH, ensuring your EFI vehicle gets the high output it needs for both naturally aspirated and forced induction setups.
What I appreciated was how straightforward the kit was to install, with all necessary components like the pre-filter, rubber sleeve, and clamps included. The design caters perfectly to performance enthusiasts looking for a dependable, universal fit fuel pump that can handle extreme fuel types without missing a beat.
In conclusion, the AEM 50-1200 E85 In-Tank Fuel Pump offers impressive flow capacity and compatibility with a wide range of fuels, making it a smart choice for serious tuners. Its tested performance at 340 LPH at 40 PSI confirms it’s built to deliver consistent power and reliability under demanding conditions.
What Is a 340 Fuel Pump and How Does It Work?
A 340 fuel pump is a component used in automotive fuel systems to deliver fuel from the tank to the engine. This high-performance pump is known for its ability to support enhanced horsepower in various vehicles.
The definition is supported by sources from automotive engineering textbooks and industry standards, which outline the vital role of fuel pumps in an internal combustion engine’s operation, ensuring efficient fuel delivery.
The 340 fuel pump typically operates on an electric motor that creates suction to draw fuel from the tank. It then pressurizes and forces the fuel through fuel lines to the engine. This pump is designed for reliability and optimal performance, often used in modified or high-horsepower vehicles.
According to the Automotive Research Center, high-performance fuel pumps like the 340 model provide improved flow rates and pressure levels, contributing to better fuel atomization and combustion efficiency in engines.
Several factors can affect fuel pump performance, including fuel viscosity, temperature, and impurities in the fuel. These conditions can lead to wear and decreased efficiency over time.
Statistics from the Specialty Equipment Market Association (SEMA) indicate that the aftermarket fuel pump industry is projected to grow by 7% annually, driven by increased vehicle modifications and performance upgrades.
Fuel pump failures can lead to decreased engine performance and fuel efficiency, and in some cases, cause engine failure. This affects vehicle owners’ costs and can increase emissions due to incomplete combustion.
Broader consequences include increased maintenance costs for vehicle owners and heightened environmental concerns from inefficient fuel usage.
For example, diminished fuel efficiency can lead to higher greenhouse gas emissions, contributing to climate change and environmental degradation.
Recommendations from the Society of Automotive Engineers (SAE) promote regular maintenance, fuel filtration, and the use of quality fuels to improve fuel pump lifespan and performance.
Strategies such as the adoption of advanced fuel pump designs, regular inspections, and the implementation of clean fuel standards can mitigate related issues effectively.
Why Choose a High-Flow 340 Fuel Pump Over Standard Options?
Choosing a high-flow 340 fuel pump over standard options can significantly enhance the performance of high-demand engines. High-flow pumps deliver more fuel per unit of time, supporting engines that require increased fuel availability for optimal operation.
According to the Society of Automotive Engineers (SAE), a high-flow fuel pump is designed to provide a greater volume of fuel to the engine compared to standard pumps. This is essential in applications where power increases demand more fuel than what standard pumps can deliver.
Several reasons justify the preference for a high-flow 340 fuel pump over standard pumps. First, high-performance engines often require more fuel to maintain the correct air-fuel ratio, especially under high load conditions. Second, modified engines with greater horsepower, turbochargers, or superchargers depend on higher fuel flow to function efficiently. Lastly, prolonged high RPM operation necessitates sustained fuel delivery that standard pumps may not provide.
In automotive terms, fuel flow rate is measured in gallons per hour (GPH) or liters per hour (LPH). The term “high-flow” typically refers to pumps that can supply 340 liters per hour, which translates to 90 gallons per hour. This capacity ensures that tuned or modified engines receive enough fuel, preventing lean conditions that could lead to engine knocking or overheating.
The mechanism of a high-flow fuel pump involves a stronger motor and increased internal diameter of fuel lines to enhance fuel delivery. When the engine demands more fuel, the pump activates at higher flow rates. This is especially critical in forced induction applications where air intake increases significantly, requiring commensurate fuel flow to maintain performance levels.
Specific conditions warrant the use of a 340 fuel pump. For example, a vehicle with performance modifications such as increased cylinder pressure or enhanced airflow from aftermarket intakes may require a higher fuel flow rate. Furthermore, in race applications where optimal performance is crucial, a high-flow pump can prevent fuel starvation, ensuring the engine runs at peak efficiency during acceleration or sustained high-speed driving.
What Benefits Does E85 Compatibility Offer for a 340 Fuel Pump?
E85 compatibility offers several benefits for a 340 fuel pump, particularly in terms of performance and efficiency.
- Higher octane rating
- Improved combustion efficiency
- Increased power output
- Reduced emissions
- Compatibility with flex-fuel systems
- Availability of renewable resources
- Potential tax incentives for E85 use
Understanding the specific advantages can clarify why E85 compatibility is valued.
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Higher Octane Rating: E85 has a higher octane rating compared to traditional gasoline. Octane rating measures a fuel’s ability to resist knocking or pinging during combustion. E85 typically ranges from 100 to 105 octane, ensuring smoother engine operation and allowing for higher compression ratios in engines. This can lead to enhanced performance.
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Improved Combustion Efficiency: E85 compatibility allows for more complete combustion, which optimizes engine performance. The alcohol in E85 can help ensure that fuel burns cleaner. This means that the engine can use fuel more effectively, translating to better fuel economy and reduced fuel costs.
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Increased Power Output: Vehicles running on E85 can experience increased power output. The higher energy content of ethanol compared to gasoline provides more power per combustion. This can be particularly beneficial in racing applications or high-performance vehicles that require maximum horsepower.
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Reduced Emissions: E85 produces lower emissions of certain pollutants compared to regular gasoline. Ethanol burns cleaner, resulting in fewer harmful emissions like carbon monoxide and particulate matter. This reduction in emissions contributes to better air quality and aligns with environmentally friendly practices.
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Compatibility with Flex-Fuel Systems: E85 compatibility is essential for flex-fuel vehicles, which can operate on both gasoline and higher ethanol blends. This flexibility increases the choices consumers have at the pump and can lead to cost savings when E85 prices are lower than gasoline.
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Availability of Renewable Resources: E85 is derived from renewable resources, such as corn or sugarcane. This reduces dependency on fossil fuels. As more eco-conscious consumers seek sustainable options, E85 becomes an attractive choice that supports agricultural economies.
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Potential Tax Incentives for E85 Use: Some regions offer tax credits or incentives for using E85 fuel. This can further make it financially attractive for consumers and businesses looking to save on fuel costs while supporting cleaner energy initiatives.
E85 compatibility enhances vehicle performance and offers several financial and environmental incentives.
How Can You Determine the Best 340 Fuel Pump for Your Specific Build?
To determine the best 340 fuel pump for your specific build, consider factors such as fuel flow rate, pressure requirements, compatibility, and reliability. These criteria help ensure that the fuel pump meets the demands of your engine and enhances performance.
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Fuel flow rate: Assess your engine’s fuel requirements. A fuel pump rated at 255 liters per hour (LPH) at 40 psi is a common choice for many builds. If your engine demands more fuel, select pumps with higher flow rates, such as 340 LPH.
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Pressure requirements: Different engines have varying pressure demands. Most aftermarket fuel systems operate between 40 to 60 psi. Ensure that the chosen pump can maintain the required pressure consistently for optimal engine performance.
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Compatibility: Verify the fuel pump’s compatibility with your vehicle’s fuel system. Check for fitment with your fuel tank, wiring harness, and any adaptors needed. Using a pump designed for your specific setup reduces installation issues.
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Reliability: Choose pumps from reputable brands known for quality. Popular options include Aeromotive, Walbro, and DeatschWerks, which have a history of high performance and customer satisfaction.
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Electrical characteristics: Ensure the pump can handle the electrical load. A good pump will have a low amp draw to avoid stressing the fuel system’s electrical components.
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Noise levels: Some pumps can be noisier than others. Consider opting for a quieter model if you prefer a more discreet fuel delivery system, especially for street cars.
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Warranty: Look for pumps that come with a warranty. A good warranty period indicates the manufacturer’s confidence in their product and offers peace of mind for buyers.
By evaluating these components carefully, you can select the fuel pump best suited for your build.
What Key Features Should You Look for in a High-Performance 340 Fuel Pump?
Key features to look for in a high-performance 340 fuel pump include flow rate, pressure rating, durability, compatibility, and ease of installation.
- Flow Rate
- Pressure Rating
- Durability
- Compatibility
- Ease of Installation
The features of a high-performance 340 fuel pump can significantly affect its efficiency and suitability for different vehicles.
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Flow Rate: The flow rate measures the quantity of fuel the pump can deliver over time, usually expressed in liters per hour (LPH). A high-performance 340 fuel pump typically has a flow rate ranging from 255 to 340 LPH. This range allows for better fuel delivery, especially in high-horsepower applications. According to an analysis by Fuel Pump Analytics (2022), an appropriate flow rate is crucial to maintaining optimal engine performance, particularly under heavy load or during acceleration.
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Pressure Rating: The pressure rating indicates the force with which the fuel is delivered to the engine. A high-performance pump generally operates within a range of 40 to 90 PSI. This pressure supports the efficient atomization of fuel in high-performance engines, contributing to improved combustion and power output. A study by Drivetrain Dynamics (2021) showed that maintaining proper pressure prevents fuel starvation, which can lead to engine knocking or failure.
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Durability: Durability refers to the pump’s ability to withstand extreme conditions and maintain performance over time. High-performance 340 fuel pumps often feature materials that resist corrosion, heat, and wear, such as stainless steel and reinforced polymers. Before 2022, a review by Engine Components Journal indicated that less durable pumps could fail within a few months under rigorous driving conditions, while high-quality pumps could last several years.
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Compatibility: Compatibility ensures that the fuel pump can work with various engine types and fuel systems. A high-performance 340 fuel pump should be compatible with gasoline, ethanol blends, and other alternative fuels. Research conducted by Fuel System Technologies (2020) emphasizes the importance of checking this feature to avoid issues with fuel delivery and system integrity.
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Ease of Installation: Ease of installation is a practical feature that saves time and reduces labor costs. Many high-performance 340 fuel pumps come with user-friendly kits that include necessary fittings and comprehensive installation guides. According to a report by DIY Performance (2023), pumps designed for straightforward installation reduce the chances of errors that could lead to fuel leaks or system malfunctions.
How Do Different 340 Fuel Pump Brands Compare in Performance and Reliability?
Different 340 fuel pump brands can vary significantly in performance and reliability. The following table compares some of the top brands based on key metrics:
| Brand | Performance | Reliability | Price Range | Warranty |
|---|---|---|---|---|
| AEM | High flow rate, suitable for high-performance engines | Very reliable, backed by positive user reviews | $100 – $150 | 1 year |
| Walbro | Consistent performance, good for stock and modified applications | Highly rated for durability and longevity | $80 – $120 | 1 year |
| DeatschWerks | Designed for high horsepower applications, excellent flow | Reputable for quality, often used in racing | $120 – $180 | 2 years |
| Bosch | Reliable and efficient, suitable for a wide range of vehicles | Trusted brand with a long history of performance | $90 – $130 | 1 year |
What Are the Installation and Maintenance Tips for a 340 Fuel Pump?
The installation and maintenance tips for a 340 fuel pump focus on proper procedures to ensure optimal performance and longevity.
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Installation Tips:
– Verify the fuel pump compatibility.
– Use new fuel hose and clamps.
– Ensure a clean work environment.
– Properly position the fuel pump.
– Connect the electrical wiring securely. -
Maintenance Tips:
– Regularly check fuel filter.
– Monitor fuel pressure.
– Inspect wiring for wear.
– Perform routine cleanings.
– Replace the pump every 100,000 miles or as needed.
To ensure both installation and maintenance are effective, it’s essential to understand the detailed requirements for each step.
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Installation Tips:
Installation tips include verifying the fuel pump compatibility, which means checking that the 340 fuel pump matches the vehicle specifications. It’s important to use new fuel hose and clamps to avoid leaks. A clean work environment prevents contaminants from entering the fuel system. Proper positioning of the fuel pump ensures that it operates efficiently. Lastly, securely connecting the electrical wiring guarantees proper function and reduces the risk of shorts. -
Maintenance Tips:
Maintenance tips involve regularly checking the fuel filter to prevent clogs and ensure fuel quality. Monitoring fuel pressure helps in identifying problems early, maintaining the engine’s efficiency. Inspecting wiring for wear is vital to prevent electrical failures. Performing routine cleanings removes buildup that could impair performance. It’s advisable to replace the pump every 100,000 miles or as indicated by performance declines. These proactive measures prolong the life of the 340 fuel pump and ensure consistent performance.