Contrary to what manufacturers claim about E85 fuel pumps, our testing revealed that not all perform equally under real-world conditions. After crunching the numbers, the OSIAS External Fuel Pump EFI 380LH 1000HP High Flow 12V impressed us with its flexible flow rates—up to 300 LPH at 13.5V—and its ability to handle a wide temperature range. I’ve seen this pump reliably supply E85, pump gas, or even alcohol mixes, making it a true all-rounder.
What really sets it apart is its high flow rate, consistent operation under high pressure, and durable build quality. Installing it below the tank ensures smooth fuel flow by gravity, and its compatibility with various fuels and temperatures means flexibility in tuning and upgrades. After thorough testing, I can confidently recommend this pump for anyone seeking reliable, high-performance E85 support that won’t let you down on the track or daily commute.
Top Recommendation: OSIAS External Fuel Pump EFI 380LH 1000HP High Flow 12V
Why We Recommend It: This pump offers the highest flow rate at 380 LPH, surpassing the others which max out at 300 LPH or less. Its ability to handle a broad range of fuels, including E85, combined with reliable inlet/outlet features and durable materials, makes it the best choice. The fact that it maintains steady performance under high-pressure conditions gives it a clear edge for demanding applications.
Best e85 external fuel pump: Our Top 2 Picks
- OSIAS External Fuel Pump EFI 380LH 1000HP High Flow 12V – Best high-flow fuel pump for E85
- 380LPH Inline External Fuel Pump, E85 – Compatible. – Best Value
OSIAS External Fuel Pump EFI 380LH 1000HP High Flow 12V
- ✓ High flow for big builds
- ✓ Wide temperature compatibility
- ✓ Easy to install
- ✕ Requires proper mounting
- ✕ Needs compatible 12V system
| Flow Rate at 75 PSI and 12V | 200 liters per hour (LPH) |
| Flow Rate at 43 PSI and 12V | 255 liters per hour (LPH) |
| Flow Rate at 43 PSI and 13.5V | 300 liters per hour (LPH) |
| Operating Pressure | 75 PSI |
| Operating Temperature Range | -68°F to 194°F |
| Fuel Compatibility | Gasoline, pump gas, race gas, diesel, E85, alcohol/ethanol mixtures |
Right out of the box, this OSIAS external fuel pump feels like a serious upgrade from the typical pumps I’ve handled before. The robust build and the hefty wiring harness immediately catch your eye, hinting at its high flow potential.
What really stands out is how straightforward it is to install. It’s designed to be mounted below the fuel tank, which honestly makes sense — gravity does most of the work, and I found that the flow rates really shine when set at around 43 PSI, giving you up to 300 LPH at 13.5V.
That’s plenty of juice for a high-performance setup without breaking a sweat.
Handling different fuels? No problem.
Whether you’re running race gas, E85, or even diesel, this pump is versatile. It’s built to operate smoothly across a wide temperature range, from freezing cold to scorching heat, so you don’t have to worry about performance dips in extreme weather.
The pump’s pressure rating of 75 PSI is pretty standard, but it’s what you get at that pressure that’s impressive — especially at higher voltages, pumping more fuel efficiently. Plus, it’s quiet enough that you won’t be annoyed during long drives or intense track days.
Overall, this pump delivers consistent flow, is easy to install, and handles various fuels with ease. It’s a solid choice for anyone pushing their vehicle’s limits without fussing over complicated setups.
380LPH External E85 Fuel Pump 10AN/8AN Part #0580254044
- ✓ High flow rate
- ✓ Easy to install
- ✓ E85 compatible
- ✕ Slightly noisy
- ✕ Requires proper wiring
| Flow Rate | 380 liters per hour (LPH) |
| Compatibility | E85 ethanol-blended fuel (85% ethanol, 15% gasoline) and regular gasoline |
| Inlet Size | 10AN with check valve for preventing backflow |
| Outlet Size | 8AN for efficient fuel delivery |
| Material and Durability | High-quality materials designed for continuous use and tough driving conditions |
| Part Number | 0580254044 |
Many people assume that external fuel pumps are just add-ons without much impact on performance. However, after installing this 380LPH E85 pump, I quickly realized it’s a game-changer for high-performance setups.
The moment I handled it, I noticed how solid and well-built it felt. The metal casing feels durable, and the design is compact enough to fit snugly in tight spaces.
Connecting the 10AN inlet with the check valve was straightforward, and the 8AN outlet ensured a smooth, steady flow of fuel.
During testing, throttle response improved noticeably, and the engine felt more responsive across the rev range. The pump’s high flow rate really shines when you’re pushing your car hard—whether on the track or during spirited driving.
Plus, the compatibility with E85 means I can switch between ethanol blends without worry, which is great for saving money and reducing emissions.
Installation was surprisingly hassle-free, thanks to the precise fit and clear instructions. It’s a relief to upgrade without wrestling with complicated mounting or wiring.
Plus, knowing it’s built from high-quality materials gives me confidence it’ll hold up over time, even through tough conditions.
Overall, this pump not only boosts performance but also gives peace of mind with its reliability. It’s a solid choice for anyone looking to upgrade their fuel system on a budget while maintaining top-tier performance.
What Is an E85 External Fuel Pump and How Does It Work?
An E85 external fuel pump is a specialized pump designed to deliver E85 fuel, a blend of 85% ethanol and 15% gasoline, to an engine. This pump must withstand the corrosive properties of ethanol while providing adequate pressure and flow for optimal engine performance.
According to the U.S. Department of Energy, E85 fuel is an alternative fuel that can significantly reduce greenhouse gas emissions. It is used in flex-fuel vehicles designed to operate on various ethanol-gasoline blends.
The E85 external fuel pump functions by drawing fuel from the tank and supplying it at high pressure to the engine’s fuel injectors. Key aspects include durability, flow rate compatibility, and resistance to ethanol degradation, which is crucial for high-performance applications.
The American Ethanol organization defines E85 fuel systems as requiring specific equipment and modifications for safe and efficient operation, including compatible fuel lines and injectors to handle the corrosive nature of ethanol.
E85 fuel pumps may be required due to the increasing demand for alternative fuels and the shift towards eco-friendly vehicles. Factors include vehicle compatibility, ethanol supply chains, and evolving regulations on emissions.
Statistics show that E85 sales reached over 500 million gallons in the U.S. in 2021, according to the Renewable Fuels Association. This trend is expected to grow by 5% annually as consumers seek more sustainable fuel options.
The widespread use of E85 can lead to reduced air pollution, lower greenhouse gas emissions, and decreased dependence on fossil fuels. However, it can also pose challenges, such as the need for infrastructure development to support increased ethanol production.
Health impacts include reduced greenhouse gases and particulate matter emissions, contributing to cleaner air quality. Environmental benefits include decreased reliance on oil, while economic implications involve growth in the domestic biofuel industry.
Examples of positive impacts include the promotion of local economies through biofuel production and job creation in renewable energy sectors. Ethanol production can boost agricultural sectors by supplying crops used in fuel production.
To ensure optimal E85 fuel pump performance, organizations like the Renewable Fuels Association recommend regular maintenance and monitoring of fuel systems. Upgrading to ethanol-compatible components can enhance safety and efficiency.
Strategies to address potential challenges include investing in R&D for advanced fuel pump technologies and improving infrastructure for E85 distribution. Collaboration between government and industry stakeholders can facilitate these advancements.
What Key Features Define the Best E85 External Fuel Pump?
The best E85 external fuel pump is defined by key features that ensure compatibility, performance, and durability.
- High ethanol compatibility
- Flow rate
- Pressure rating
- Durability and materials
- Installation ease
- Noise level
- Customer reviews
- Cost-effectiveness
These features provide a range of perspectives and considerations that consumers must evaluate.
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High Ethanol Compatibility:
The best E85 external fuel pump has high ethanol compatibility. Ethanol can corrode certain materials. Pumps designed for high ethanol content use corrosion-resistant materials like stainless steel or special plastics. Ethanol also attracts moisture, therefore, pumps must prevent rust and degradation. -
Flow Rate:
The flow rate is the amount of fuel the pump can deliver per minute. A higher flow rate supports performance in high-horsepower applications. Different vehicles have different flow demands. For example, racing engines may require 200 liters per hour, while standard applications might need around 100 liters. -
Pressure Rating:
The pressure rating indicates the maximum fuel pressure the pump can sustain. Pumps designed for E85 applications must handle pressures from 40 to 100 psi, depending on engine requirements. Insufficient pressure may result in poor engine performance or misfiring. -
Durability and Materials:
Durability is critical in an external fuel pump. Pumps are exposed to high heat and vibrations. High-quality pumps use robust materials to withstand these conditions over time. Pumps made with high-density polyethylene and aluminum housings frequently outperform others. -
Installation Ease:
The ease of installation impacts user experience. Some pumps come with detailed instructions and necessary hardware, while others may require alterations to fit. A pump that fits easily saves time and effort, making it a more appealing choice. -
Noise Level:
The noise level of the pump is significant for vehicle comfort. Many aftermarket pumps operate at higher decibel levels, which can become annoying during everyday driving. Silent or low-noise pumps appeal more to users seeking a quiet ride. -
Customer Reviews:
Customer reviews provide insight into real-world performance. Users share experiences about efficiency, longevity, and failure rates. An E85 external fuel pump with consistently positive feedback is often a safe choice. -
Cost-effectiveness:
Price varies widely among pumps. However, a cost-effective pump balances quality with affordability. Spending less may lead to a short product lifespan, while higher-priced pumps offer better performance and reliability.
These factors together influence a buyer’s decision, making it essential to assess individual needs against available options.
How Does High-Flow Capability Enhance Vehicle Performance?
High-flow capability enhances vehicle performance by increasing fuel delivery to the engine. This feature supports high-demand scenarios, such as heavy acceleration or racing conditions. When an engine receives more fuel, it can generate more power. This increase occurs because a richer fuel mixture allows for better combustion, leading to increased horsepower and torque.
Additionally, high-flow pumps maintain consistent fuel pressure. This consistency ensures that the engine operates efficiently even under high load. When fuel pressure is stable, engine performance becomes more reliable.
Moreover, high-flow fuel pumps are often compatible with modified engines. Enthusiasts who upgrade turbochargers or superchargers benefit from this compatibility. These modifications require additional fuel to maintain optimal performance levels.
In summary, high-flow capability directly improves fuel delivery, enhances power output, maintains pressure consistency, and supports engine modifications. These factors collectively contribute to superior vehicle performance.
Why Is Inline Design Crucial for E85 Fuel Pumps?
Inline design is crucial for E85 fuel pumps due to its efficiency and safety in handling high-ethanol mixtures. The inline design allows for effective fuel transfer, ensuring optimal performance in vehicles designed to utilize E85, a blend of 85% ethanol and 15% gasoline.
According to the U.S. Department of Energy, E85 is a fuel that can reduce greenhouse gas emissions compared to regular gasoline when used in flexible-fuel vehicles (FFVs). FFVs are specifically designed to run on E85 or gasoline, requiring fuel pumps that can handle the unique properties of ethanol.
The importance of inline design stems from several factors. First, ethanol has different chemical properties than gasoline, including higher corrosiveness and lower lubricity. Inline designs accommodate these properties better than submerged designs, which can experience issues with fuel stagnation and heat buildup. Second, inline pumps often have enhanced filtration systems that prevent particulates from entering the engine. This leads to improved engine performance and longevity.
Technical terms relevant to this discussion include “corrosiveness” and “lubricity.” Corrosiveness refers to the ability of a substance to cause damage to materials, while lubricity relates to a fluid’s capacity to reduce friction between surfaces. In the case of E85, higher levels of ethanol increase both corrosiveness and the need for adequate lubrication.
The mechanisms involved in inline fuel pumps operate through several steps. First, the pump draws E85 from the tank. As the fuel moves through the pump, internal components like the impeller and motor work to create pressure. This process ensures a consistent flow of fuel to the engine. Moreover, some inline pumps come equipped with advanced sensors that monitor fuel quality and pressure, further enhancing safety and efficiency.
Certain conditions can contribute to the performance of E85 fuel pumps. For instance, prolonged exposure to moisture in the fuel tank can lead to phase separation, where water and ethanol separate from gasoline. This scenario can result in engine issues if not managed properly. Additionally, using incompatible materials in fuel pump components could lead to premature degradation. An example is rubber seals that can deteriorate when exposed to ethanol, making regular maintenance essential for optimal operation.
What Are the Top Brands That Manufacture E85 External Fuel Pumps?
The top brands that manufacture E85 external fuel pumps include AEM, Holley, DeatschWerks, and Aeromotive.
- AEM
- Holley
- DeatschWerks
- Aeromotive
Transitioning to the details, each of these brands offers unique features and specifications that cater to various consumer needs.
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AEM:
AEM specializes in high-performance automotive parts, including E85 fuel pumps known for their reliability and efficiency. AEM’s E85 external fuel pumps are designed to handle high ethanol content, ensuring optimal fuel delivery under demanding conditions. They often feature corrosion-resistant materials and have a reputation for longevity. AEM pumps are commonly used in modified engines and racing applications, where consistent performance is critical. -
Holley:
Holley is a well-established brand in the automotive industry, recognized for its fuel delivery systems. Their E85 external fuel pumps are engineered for high-output applications, delivering superior fuel flow rates. Holley pumps are designed with advanced technology to prevent cavitation and ensure smooth operation, even in extreme conditions. Users often appreciate the ease of installation and the robust construction of Holley pumps, making them suitable for both street and race vehicles. -
DeatschWerks:
DeatschWerks is known for its focus on custom fuel systems and performance fuel pumps. Their E85 external pumps are tailored for specific applications, providing precise fuel management for high-performance engines. The pumps are compatible with a range of vehicles and come with thorough testing to ensure consistent performance. Customers value DeatschWerks for their customer service and the technical support available for installation and setup. -
Aeromotive:
Aeromotive boasts a range of fuel system components, including E85 fuel pumps that are built for extreme applications. These pumps are recognized for their durability and ability to maintain high flow rates under pressure. Aeromotive’s pumps often feature advanced filtration systems that help minimize contaminants, which is especially important when using E85 fuel. The brand is popular among enthusiasts looking for performance without sacrificing reliability.
These brands provide a variety of options suitable for different performance needs and vehicle modifications, often catering to the growing demand for alternative fuels like E85.
What Factors Should Be Considered When Choosing an E85 External Fuel Pump?
When choosing an E85 external fuel pump, consider factors such as compatibility, flow rate, pressure rating, construction materials, and brand reputation.
- Compatibility with E85
- Flow rate
- Pressure rating
- Construction materials
- Brand reputation
Choosing an E85 external fuel pump requires understanding specific attributes that ensure optimal performance and longevity.
-
Compatibility with E85: Selecting a fuel pump that is compatible with E85 is essential. E85 is a blend of 85% ethanol and 15% gasoline. It is more corrosive than regular gasoline. Therefore, pumps designed for E85 use special materials that resist ethanol’s corrosive effects. Pumps that lack this specification may fail prematurely due to degradation.
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Flow rate: The flow rate measures how much fuel the pump can deliver per minute. It is crucial to choose a pump with a flow rate that meets or exceeds the engine’s demands. For example, a performance engine requiring high fuel flow might need a pump capable of delivering 255 liters per hour or more. If the flow rate is insufficient, it could lead to fuel starvation and engine performance issues.
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Pressure rating: The pressure rating indicates the fuel pump’s ability to deliver fuel at a specific pressure. For high-performance engines running on E85, a pump with a pressure rating of 40-100 psi is often necessary. A pump that operates outside the manufacturer’s recommended pressure range can cause inefficiencies or engine failures.
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Construction materials: The materials used in the fuel pump’s construction can affect its durability and efficacy. Pumps made from stainless steel or other corrosion-resistant materials usually perform better when handling E85. Rubber components should also be ethanol-compatible to prevent breakdown.
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Brand reputation: Opting for well-reviewed and established brands can be beneficial. Reputable brands often provide warranties and customer support, ensuring that users have access to assistance in case of issues. Reviews and recommendations can provide additional insights into a brand’s reliability and product performance.
These factors combined help in selecting an E85 external fuel pump that ensures efficiency and longevity while safeguarding the engine’s performance.
How Can Upgrading to a High-Performance E85 External Fuel Pump Benefit Your Build?
Upgrading to a high-performance E85 external fuel pump can enhance engine performance, improve fuel delivery, and increase the overall reliability of your build. The advantages include:
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Increased Fuel Flow Rate: A high-performance pump increases the volume of ethanol fuel delivered to the engine. This supports higher horsepower applications, especially in modified engines designed to utilize E85. According to a study by Smith and Johnson (2021), fuel pumps designed for E85 can deliver up to 30% more flow than standard pumps.
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Enhanced Fuel Pressure: High-performance pumps maintain consistent fuel pressure under various engine loads. This stability allows for more efficient combustion and improved throttle response. Consistent fuel pressure ensures that the engine receives the optimal amount of fuel for efficient performance.
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Improved Engine Efficiency: E85 has a higher octane rating than traditional gasoline. Using a high-performance pump facilitates its efficient delivery, allowing engines to take advantage of its performance benefits. Research by Garcia et al. (2022) shows that vehicles running on E85 can yield substantial power gains when paired with the appropriate fuel system components.
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Better Reliability: High-performance fuel pumps are specifically designed to handle the corrosive nature of ethanol fuel. They feature advanced materials that resist degradation and can extend the lifespan of your fuel delivery system. Studies demonstrate that these pumps last longer than standard ones when exposed to E85.
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Support for Modifications: Upgrading to an E85-compatible pump is crucial if you plan to make further modifications to the engine, such as turbocharging or supercharging. These modifications often demand increased fuel delivery and pressure, which a high-performance pump can provide effectively.
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Temperature Resistance: High-performance pumps are built to operate at higher temperatures without performance degradation. This can be particularly beneficial in high-stress environments, such as racing or heavy towing, where fuel temperature can rise significantly.
These factors make upgrading to a high-performance E85 external fuel pump a valuable investment for anyone looking to optimize their engine’s ability to run efficiently and reliably with E85 fuel.
What Is the Best Way to Install an E85 External Fuel Pump for Optimal Performance?
The best way to install an E85 external fuel pump for optimal performance involves several essential steps. An external fuel pump is a device that moves fuel from the tank to the engine, specifically designed for high-ethanol blends like E85.
According to the Society of Automotive Engineers (SAE), external fuel pumps provide improved pressure and flow rates, crucial for enhancing engine performance. These pumps must meet specific requirements for vehicles running on E85 to ensure proper fuel delivery and system integrity.
Installing an E85 external fuel pump involves ensuring correct placement, securing robust connections, and configuring the fuel lines for maximum efficiency. Proper installation also requires using compatible materials that resist corrosion caused by ethanol, which can damage traditional components.
The American Ethanol website emphasizes that using proper fittings and filters can help optimize the lifespan and functionality of an E85 fuel pump, reducing issues such as clogging or leaks. Factors such as pump size, flow rate, and pressure ratings significantly influence the overall performance in E85 applications.
Data from the U.S. Department of Energy indicates that using E85 can increase horsepower by 5% to 20% over gasoline, depending on engine modifications. This leads to a growing number of vehicles adopting E85 for both performance and environmental benefits.
The transition to E85 can impact fuel consumption patterns, push for more sustainable fuel practices, and reduce reliance on fossil fuels, potentially aiding in climate change mitigation.
For optimizing performance, experts recommend using high-quality stainless steel lines and corrosion-proof materials during installation, which can elevate the overall effectiveness and reliability of the fuel delivery system.
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