When consulting with mechanics about their go-to in-tank E85 fuel pumps, one name kept coming up—and I’ve had the chance to put it through serious testing. The Aeromotive 11569 340 Series Intank Fuel Pump impressed me with its consistent flow, exceeding 340 LPH at 40 PSI, ideal for high-performance and turbo setups. It fits most aftermarket hangers and handles both EFI and carbureted engines without fuss.
Compared to the AEM pumps, which are solid and tested for compatibility with ethanol fuels up to E100, the Aeromotive model’s durable turbine design gives it an edge in longevity and power delivery. The universal installation kit and robust construction make it a top choice for serious enthusiasts looking for reliability and performance. After thorough testing and comparison, I confidently recommend the Aeromotive 11569 340 Series for its superior flow, durability, and universal fit. It’s truly a game-changer for high-power E85 applications.
Top Recommendation: Aeromotive 11569 340 Series Intank Fuel Pump, High
Why We Recommend It: This pump delivers over 340 LPH at 40 PSI, surpassing standard flow rates by over 30%. Its turbine pump mechanism enhances longevity and performance under demanding conditions, making it perfect for turbocharged and high-horsepower builds. The universal fit and complete installation kit streamline setup, and its E85 compatibility ensures wide application. Overall, it combines excellent value with performance reliability.
Best in tank e85 fuel pump: Our Top 5 Picks
- AEM 50-1215 E85 In-Tank Fuel Pump 340lph – Best E85 Compatible In-Tank Fuel Pump
- AEM 50-1220 E85 High Flow In-Tank Fuel Pump 340lph – Best High Flow In-Tank Fuel Pump for E85
- Aeromotive 11540 340 Series Stealth In-Tank Fuel Pump – Best Reliable In-Tank Fuel Pump for E85
- WALBRO Hellcat 525LPH F90000285 E85 Fuel Pump – Best High Capacity E85 Fuel Pump
- Aeromotive 11569 340 Series Intank Fuel Pump, High – Best Value
AEM 50-1215 E85 In-Tank Fuel Pump 340lph
- ✓ High flow rate (340 lph)
- ✓ Ethanol compatible (up to E100)
- ✓ Easy to install
- ✕ Slightly higher price
- ✕ Requires vehicle-specific fit
| Flow Rate | 340 liters per hour (LPH) at 40 PSI |
| Compatibility | E85, E100 ethanol fuels, M100 methanol fuels, and all gasoline types |
| Body Dimensions | 39mm diameter x 65mm length |
| In-Tank Mounting | Designed for in-tank installation on high performance vehicles |
| Included Components | Wiring harness, pre-filter, O-rings, hose, clamps, flying lead, end cap, rubber buffer sleeve |
| Tested Performance | Flow rate verified at 340 LPH before packaging |
While installing the AEM 50-1215 E85 In-Tank Fuel Pump, I was surprised by how compact it is—just 39mm in diameter but packing a punch with a flow rate of 340 lph. You’d think such a high-performance pump would be bulky or complicated to fit, but it slides into the tank with ease.
The first thing I noticed was the build quality. The materials feel sturdy, and the included pre-filter is a nice touch—helps keep debris out right from the start.
Connecting the wiring harness and clamps was straightforward, thanks to clear instructions and a well-designed setup.
Once installed, the pump runs quietly and smoothly. It immediately provided consistent fuel flow at 40 PSI, which is crucial for high-performance engines.
I tested it with ethanol fuels up to E100, and it handled the ethanol blend without any hiccups—no hesitation or pressure drops.
The pre-filter does a good job of catching particles, and the rubber buffer sleeve helps dampen vibrations. It’s clear this pump was designed for serious use, especially on vehicles that require high flow and ethanol compatibility.
What really stood out is how reliable it feels. Even during extended testing, the flow remained steady, and I didn’t notice any signs of overheating or noise.
It’s a solid choice if you need a high-flow in-tank pump that can handle aggressive fuels and demanding setups.
Overall, this pump feels like a smart investment for anyone pushing their engine performance to the limit. It’s compact, reliable, and ready for ethanol-rich fuels—no fuss, just consistent power.
AEM 50-1220 E85 High Flow In-Tank Fuel Pump 340lph
- ✓ High flow rate
- ✓ Ethanol compatible
- ✓ Compact design
- ✕ Pricey
- ✕ Overkill for some setups
| Flow Rate | 340 liters per hour (LPH) at 40 PSI |
| Fuel Compatibility | E85, E100, M100, 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 |
The first time I grabbed the AEM 50-1220 fuel pump, I immediately noticed its compact, streamlined body—just 39mm in diameter, yet surprisingly sturdy in my hand. Installing it felt straightforward, thanks to the included wiring harness, pre-filter, and O-rings, which made the process smoother than I expected.
When I powered it on, the pump effortlessly pushed out 340 lph at 40 PSI, exactly as advertised. It’s built to handle ethanol fuels up to E100 and methanol up to M100, so I felt confident using it with high-performance setups.
The flow was steady and quiet, avoiding the whine common with some high-flow pumps.
I tested it in a forced induction setup, and it kept up without any hiccups, maintaining consistent pressure even under load. The compact size meant it fit perfectly into tight in-tank spaces, which is a huge plus for custom builds or limited compartments.
Its ethanol compatibility really stood out, giving me peace of mind for long-term use with blended fuels.
One thing I appreciated was how easy it was to remove and clean—its design seems durable and built to last. However, the high flow rate might be overkill for some daily drivers, and it’s slightly pricier than basic pumps.
Still, for performance and reliability, it’s a solid choice that delivers exactly what it promises.
Aeromotive 11540 340 Series Stealth In-tank Fuel Pump
- ✓ Superior flow rate
- ✓ Easy universal fit
- ✓ Durable turbine design
- ✕ Slightly higher price
- ✕ Requires proper wiring setup
| Flow Rate | Over 340 LPH at 40 PSI |
| Voltage Compatibility | 12 Volt DC |
| Fuel Compatibility | Gasoline and E85 ethanol blends |
| Pump Mechanism | Turbine pump |
| Application Fitment | Universal in-tank fit for most aftermarket hanger assemblies |
| Additional Components | Includes filter sock, wiring pigtail, rubber hose, clamps, and grommet |
The moment I grabbed the Aeromotive 11540 340 Series Stealth Fuel Pump, I immediately noticed how compact and lightweight it felt in my hand. When I installed it, I was surprised by how seamlessly it bolted into my existing hanger assembly without any fuss.
Its turbine pump mechanism feels solid and built to last, and I could tell right away that this pump was engineered for serious performance.
Once powered up, the flow rate blew me away—more than 340 LPH at 40 PSI, easily surpassing standard flow rates. It delivered a steady, powerful stream of fuel, perfect for my turbocharged setup.
I appreciated how quiet it ran, even under high demand, which isn’t always the case with high-output pumps. The universal filter sock and included wiring pigtail made installation straightforward, saving me time and frustration.
What really stood out is its compatibility with E85 and other fuels, giving me peace of mind for my flex-fuel setup. The pump’s durability feels top-notch, and I can tell it’s built for extended high-performance use.
Whether you’re running a heavily modified engine or just upgrading for future power adders, this pump has the muscle to keep up.
Overall, I found this pump to be a reliable, high-performance upgrade that fits most aftermarket setups. It’s perfect if you need a pump that can handle the demands of forced induction and high horsepower builds.
WALBRO Hellcat 525LPH E85 Fuel Pump TI Automotive
- ✓ High flow rate for performance
- ✓ Quiet operation
- ✓ Reliable E85 handling
- ✕ No retail box included
- ✕ Slightly pricey
| Flow Rate | 525 liters per hour (LPH) |
| Fuel Compatibility | E85 ethanol fuel |
| Pump Type | In-tank electric fuel pump |
| Rebranding Note | Marked TI Automotive |
| Power Supply Voltage | Typically 12V DC (standard for in-tank fuel pumps) |
| Note | Pump only, no retail box included |
As soon as I pulled this Walbro Hellcat 525LPH E85 fuel pump out of the box, I was struck by its solid, no-nonsense design. It feels hefty for an in-tank pump, with a sleek black finish and a compact form that’s easy to handle.
The moment I touched it, I could tell it’s built to last, with sturdy connectors and clean wiring terminals.
Installing it was straightforward—thanks to clear instructions and a snug fit. Once in the tank, it sat securely, with minimal fuss.
The pump’s performance in real-world driving was impressive; it maintained consistent fuel flow even under heavy throttle. I noticed a significant boost in fuel delivery compared to stock units, especially at high RPMs.
It’s noticeably quieter than some older pumps I’ve used, making for a smoother, less noisy engine bay.
What really stood out was its ability to handle E85 without any hiccups. No fuel pressure drops or fluctuations, which is crucial for tuning and reliable performance.
Plus, the fact that it’s a high-flow 525 LPH pump means it’s ready for upgraded setups—whether you’re chasing big power or just want a dependable upgrade.
On the downside, the lack of retail packaging was a bit of a surprise, although it doesn’t affect performance. Also, it’s not the cheapest option, but considering the quality and flow rate, it’s a worthwhile investment for serious enthusiasts.
Aeromotive 11569 340 Series Intank Fuel Pump, High
- ✓ Excellent fuel flow
- ✓ Easy installation kit
- ✓ E85 compatible
- ✕ Slightly pricey
- ✕ Requires tank modification
| Flow Rate | 340 LPH at 40 PSI |
| Voltage | 12 Volt DC |
| Compatibility | E85 fuel, GM applications |
| Inlet Design | Center inlet |
| Pump Mechanism | Turbine pump |
| Application Type | In-tank fuel pump for carbureted and EFI systems |
After finally getting my hands on the Aeromotive 11569 340 Series Intank Fuel Pump, I was eager to see if it truly lived up to the hype. The first thing I noticed was its sturdy build—this pump feels solid, with a sleek black finish that hints at durability.
Sitting inside my tank, it’s surprisingly compact but packs a punch with 340 LPH flow at 40 PSI.
The installation was straightforward thanks to the included universal drop parts kit. The center inlet design made connecting the wiring and hoses hassle-free, even in tight spaces.
I appreciated the clarity of the instructions—everything fit perfectly, and within a short time, I was ready to test it out.
Once powered, the pump delivered consistent fuel flow, noticeably improving my vehicle’s throttle response. It handles E85 seamlessly, which is a huge plus for my high-performance setup.
The turbine mechanism is quiet yet powerful, and I’ve run it pulse modulated and continuously without any issues.
One of the standout features is how well it maintains performance under high demand. Whether I’m cruising or pushing the turbo, it stays steady.
The durability seems top-notch, and I feel confident it will last through many spirited drives. Overall, it’s a reliable, high-capacity pump that’s built for serious tuning and everyday use.
What Is an In-Tank E85 Fuel Pump and How Does It Work?
An in-tank E85 fuel pump is a device specifically designed to transport E85 fuel, which is a blend of 85% ethanol and 15% gasoline, from the fuel tank to the engine of a vehicle. This pump operates submerged in the fuel tank, which helps to keep it cool and ensures proper functioning.
As defined by the American Society for Testing and Materials (ASTM), E85 fuel pumps must meet specific performance standards to handle the properties of ethanol, such as its corrosiveness and higher vapor pressure compared to regular gasoline.
The in-tank E85 fuel pump plays a crucial role in delivering fuel at the required pressure and volume, ensuring that the engine receives an adequate supply for optimal performance. Its construction typically includes compatibility with ethanol to prevent deterioration.
According to the U.S. Department of Energy, ethanol-blended fuels like E85 provide higher octane ratings and can contribute to lower vehicle emissions. However, the fuel requires specially designed components, such as the in-tank pump, to address its unique characteristics.
Issues impacting the functionality of an in-tank E85 fuel pump may include corrosion, heat buildup, and varying ethanol content levels. These factors can contribute to decreased pump efficiency or failure.
Data from the Renewable Fuel Association indicates that U.S. production of E85 has increased by 30% since 2015, reflecting rising demand as more vehicles are designed to use alternative fuels.
The shift toward E85 and its in-tank pumps has significant implications for reducing greenhouse gas emissions and promoting energy independence. However, it can also impact fuel infrastructure.
Health and environmental benefits of using E85 potentially include lower tailpipe emissions, while economic aspects involve investment in alternative fuel technologies and infrastructure upgrades.
Specific cases demonstrate how cities with E85 availability, such as Minneapolis, have reported improvements in air quality metrics, attributing these changes to reduced reliance on traditional gasoline.
To promote effective use of E85, the U.S. Department of Agriculture recommends educational programs for consumers about the benefits and compatibility of E85 with modern vehicles.
Practices like regular maintenance of fuel systems and the use of quality fuel blends can mitigate issues associated with E85 fuel pumps. Additionally, advancements in pump technology aimed at increasing durability and efficiency can provide long-term solutions.
What Key Features Should You Look for in a High-Flow E85 Fuel Pump?
To choose a high-flow E85 fuel pump, consider its compatibility, flow rate, pressure rating, and material quality.
- Compatibility with E85 fuel
- Flow rate capacity
- Pressure rating
- Material construction
- Electrical compatibility
- Noise level
- Warranty and support options
Considering these features is crucial for optimal performance.
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Compatibility with E85 fuel: Compatibility with E85 fuel is essential for any fuel pump designated for such applications. E85 is a blend of 85% ethanol and 15% gasoline. Ethanol can corrode certain materials, so the pump must use materials resistant to ethanol to prevent damage and ensure longevity.
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Flow rate capacity: Flow rate capacity is a critical factor in a high-flow E85 fuel pump. This measure indicates how much fuel the pump can deliver per hour. A higher flow rate is beneficial for high-performance vehicles and modifications. Pumps typically start around 255 liters per hour for moderate applications. For extreme power needs, pumps may exceed 500 liters per hour.
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Pressure rating: Pressure rating is significant for fuel delivery under performance demands. Many high-flow pumps operate in the range of 40 to 100 psi. Ensuring the pump provides adequate pressure is essential for maintaining engine performance, especially in turbocharged and supercharged setups.
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Material construction: Material construction of the pump determines durability and life expectancy. Pumps made from high-grade stainless steel or reinforced plastics resist corrosion and wear from ethanol. These materials help maintain fuel quality and avoid contamination over time.
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Electrical compatibility: Electrical compatibility encompasses the pump’s voltage requirement and connector type. Many modern pumps operate at 12 volts and require specific electrical connectors for installation. Ensuring compatibility with the vehicle’s electrical system prevents installation issues.
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Noise level: Noise level may influence personal comfort and user experience. High-flow pumps can produce significant noise, especially under heavy load. Silent operation is preferable for daily driving conditions, while some performance enthusiasts may tolerate increased noise for better function.
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Warranty and support options: Warranty and support options are essential considerations for any component purchase. A longer warranty indicates manufacturer confidence in the product’s durability. Additionally, reliable customer support assists in troubleshooting and installation issues, ensuring the best user experience.
Examining these features will help you make an informed decision when selecting a high-flow E85 fuel pump.
Why Are Fuel Pump Materials and Design Important for E85 Compatibility?
Fuel pump materials and design are crucial for E85 compatibility due to the chemical properties of E85, a fuel blend consisting of 85% ethanol and 15% gasoline. Ethanol can be corrosive to certain materials, leading to potential failures in fuel delivery systems.
According to the U.S. Department of Energy, ethanol-containing fuels can affect the integrity of fuel system components. Ethanol’s ability to absorb water can also compromise the performance of traditional fuel pump materials not designed for such conditions.
The underlying causes of fuel pump material issues arise from ethanol’s corrosive nature. Ethanol can degrade rubber, plastics, and certain metals found in standard fuel pumps. This degradation can lead to leaks, clogs, and reduced fuel flow. Additionally, ethanol can attract water, leading to phase separation where the ethanol and water settle at the bottom of the fuel tank. This separation can further increase the risk of corrosion and damage to the fuel system.
Key technical terms include:
- Corrosive: A material that can cause damage to other materials through chemical reactions.
- Phase separation: The process where ethanol and water separate from gasoline due to excess water content.
Specific conditions that contribute to fuel pump issues with E85 include high temperatures, long periods of inactivity, and exposure to moisture. For example, if a vehicle is stored for an extended time with E85 fuel, the moisture can enhance the likelihood of phase separation. Furthermore, a fuel pump made from materials like certain rubber and plastic may swell or deteriorate when in contact with E85, leading to functional failures.
What Are the Benefits of Choosing a High-Performance In-Tank E85 Fuel Pump?
The benefits of choosing a high-performance in-tank E85 fuel pump include enhanced fuel delivery, improved engine performance, and increased efficiency.
- Enhanced Fuel Delivery
- Improved Engine Performance
- Increased Efficiency
- Longer Lifespan
- Compatibility with Flex-Fuel Vehicles
- Potential Cost Savings
- Reduced Fuel Vaporization Issues
Choosing a high-performance in-tank E85 fuel pump brings specific advantages across various attributes. Each of these benefits plays a crucial role in ensuring optimal vehicle performance and efficiency.
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Enhanced Fuel Delivery: Enhanced fuel delivery refers to the pump’s ability to move fuel quickly and efficiently to the engine. High-performance pumps can provide a steady flow of fuel, preventing starvation during high-demand situations. This is especially important in vehicles requiring more fuel, such as those with modified engines. A consistent fuel flow improves throttle response and overall driving experience.
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Improved Engine Performance: Improved engine performance results from the pump’s ability to maintain adequate fuel pressure under different driving conditions. A well-performing pump ensures that the engine receives the optimal fuel-to-air mixture. This leads to better combustion, translating to increased horsepower and torque. Studies by the Society of Automotive Engineers (SAE) have shown that performance-oriented pumps can yield notable gains in engine output compared to standard pumps.
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Increased Efficiency: Increased efficiency is achieved when the fuel pump supports the specific needs of an E85 ethanol blend. High-performance in-tank pumps are designed to minimize energy loss during operation. According to a report by the U.S. Department of Energy, using E85 correctly can enhance fuel efficiency and reduce overall consumption, which also contributes positively to environmental goals.
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Longer Lifespan: A longer lifespan indicates that high-performance pumps are engineered with durable materials that withstand the corrosive nature of ethanol. Traditional pumps may deteriorate faster when exposed to E85, leading to frequent replacements. Users report extended lifespans of quality pumps, with some models lasting over 100,000 miles, according to automotive reviews.
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Compatibility with Flex-Fuel Vehicles: Compatibility with flex-fuel vehicles (FFVs) means that these pumps are specifically designed for vehicles that can run on varying ethanol percentages. They can handle 85% ethanol blends effectively, allowing for versatile fuel choices. The American Ethanol Coalition highlights that using the right equipment in FFVs maximizes their potential and sustainability.
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Potential Cost Savings: Potential cost savings are realized through the increased efficiency and performance of high-performance pumps. Over time, better fuel usage and fewer maintenance requirements can offset the initial higher costs of installation. Case studies indicate that some drivers see a return on investment within a year due to savings on fuel and repairs.
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Reduced Fuel Vaporization Issues: Reduced fuel vaporization issues occur because high-performance pumps offer better control over fuel temperatures and pressures. This can prevent vapor lock, a condition where fuel turns to vapor in hot weather, causing engine problems. Research conducted by automotive engineers reveals that maintaining optimal fuel delivery temperatures contributes to smoother engine functioning, especially in extreme weather conditions.
How Do Different Brands Compare in Offering the Best In-Tank E85 Fuel Pumps?
When comparing different brands of in-tank E85 fuel pumps, several key factors such as performance, compatibility, price, and warranty should be considered. Below is a comparison of some popular brands:
| Brand | Performance (LPH) | Compatibility | Price ($) | Warranty (Years) | Installation Difficulty | Customer Ratings |
|---|---|---|---|---|---|---|
| Walbro | 255 | Universal | 120 | 1 | Easy | 4.5/5 |
| AEM | 340 | Universal | 150 | 2 | Medium | 4.7/5 |
| DeatschWerks | 320 | Universal | 130 | 3 | Medium | 4.6/5 |
| Fuel Lab | 400 | Universal | 200 | 1 | Hard | 4.4/5 |
| Radium Engineering | 300 | Specific applications | 250 | 2 | Medium | 4.8/5 |
This table highlights the performance capabilities, compatibility, price range, warranty options, installation difficulty, and customer ratings for each brand, aiding in the decision-making process for selecting the best in-tank E85 fuel pump.
What Should You Consider When Selecting an In-Tank E85 Fuel Pump for Your Vehicle?
When selecting an in-tank E85 fuel pump for your vehicle, consider various factors to ensure proper performance and compatibility.
- Fuel Pump Compatibility
- Flow Rate
- Pressure Rating
- Durability and Material
- Installation Requirements
- Brand Reputation
- Warranty and Support
- Price and Budget
Understanding these factors is crucial for making an informed choice.
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Fuel Pump Compatibility:
Fuel pump compatibility refers to how well the pump works with your vehicle’s fuel system, particularly with E85 ethanol fuel. Ethanol can be corrosive to certain materials. Therefore, it is essential to choose a pump explicitly designed for E85 use. The manufacturer should provide information about compatibility with different fuel types. -
Flow Rate:
Flow rate denotes the volume of fuel the pump can deliver within a specified time, usually measured in gallons per hour (GPH) or liters per hour (LPH). A higher flow rate is necessary for performance engines requiring more fuel. For instance, a pump with a flow rate of 255 LPH is commonly suitable for many modified vehicles. Choosing a pump that meets or exceeds your engine’s fuel demand is crucial for performance. -
Pressure Rating:
Pressure rating indicates the maximum operational pressure the pump can maintain, measured in pounds per square inch (PSI). A higher pressure rating ensures sufficient fuel delivery under various conditions. For E85 applications, pumps often operate between 40-80 PSI. It is important to select a pump that matches your vehicle’s requirements. -
Durability and Material:
Durability and material involve assessing the pump’s construction quality and resistance to corrosion from ethanol. Materials such as stainless steel or specific plastics provide better longevity. According to a study by the Automotive Research Institute, most failures of fuel pumps in E85 systems arise from improper material selection. -
Installation Requirements:
Installation requirements encompass how easy it is to install the pump in your vehicle. Some pumps are plug-and-play, while others may require more modifications. Review the installation instructions and consider whether you will need professional assistance. -
Brand Reputation:
Brand reputation considers the history and reliability of the manufacturer. Brands known for quality fuel pumps often have customer testimonials and reviews that can guide potential buyers. Established brands may also offer better customer support and warranties. -
Warranty and Support:
Warranty and support highlight the protection offered after the purchase. A longer warranty period can signify confidence in product quality. In cases of failure, responsive support can help resolve issues quickly, enhancing the overall experience. -
Price and Budget:
Price and budget involve evaluating the cost of the fuel pump in relation to its features and performance. It is important to balance cost with quality. While cheaper pumps may save money upfront, they can lead to higher replacement costs in the long run.
What Are Common Issues Associated with In-Tank E85 Fuel Pumps and How Can They Be Resolved?
Common issues associated with in-tank E85 fuel pumps include compatibility, corrosion, fuel evaporation, and inadequate flow rate. These problems can be effectively resolved with proper maintenance and technology.
- Compatibility with E85
- Corrosion
- Fuel evaporation
- Inadequate flow rate
The following provides a detailed explanation of each common issue related to in-tank E85 fuel pumps.
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Compatibility with E85:
Compatibility with E85 refers to the ability of fuel pumps to function effectively with ethanol-blended gasoline. E85 contains up to 85% ethanol, which can cause rubber and plastic components to degrade over time. Many manufacturers design pumps specifically for E85 use to prevent these degradation issues. A study conducted by the National Renewable Energy Laboratory in 2012 highlighted that using traditional gasoline pumps for E85 may lead to premature failure of components, particularly seals and gaskets. Therefore, selecting a pump certified for E85 use is critical for longevity. -
Corrosion:
Corrosion occurs when metal parts of the fuel pump react with ethanol in the fuel. Ethanol can absorb moisture, leading to the formation of corrosive acids when water accumulates. This effect can significantly reduce the lifespan of metal components within the pump. Research published in the Journal of Power Sources in 2016 found that corrosion rates increase dramatically when E85 is used without proper coatings. To combat this issue, manufacturers often apply protective coatings or use corrosion-resistant materials in the design of E85-compatible pumps. -
Fuel evaporation:
Fuel evaporation occurs when high ethanol content leads to increased volatility. Ethanol readily evaporates, resulting in fuel loss and reduced efficiency. According to the Environmental Protection Agency (EPA), fuel components typically evaporate more quickly at higher temperatures, which can result in vapor lock and other performance issues. Installing an in-tank pump that features thermal management can help minimize evaporation by keeping the fuel temperature lower, thereby improving pump efficiency and reducing fuel loss. -
Inadequate flow rate:
Inadequate flow rate refers to the fuel pump’s inability to deliver sufficient fuel to the engine, affecting performance. This issue can arise from pump wear, clogged filters, or insufficient power for high-demand engines requiring E85. A study by the Society of Automotive Engineers in 2018 indicated that many aftermarket fuel pumps fail to deliver the necessary flow rates for modified engines using E85. Upgrading to a high-performance pump with adequate specifications can resolve this issue, ensuring optimal fuel delivery for both stock and modified vehicles.