10 Best Fuel Pumps for E85 Evo Expert-Tested 2025

When I first started dabbling with E85 on my Evo, I quickly learned that the stock fuel system just wasn’t going to cut it. It’s not just about more fuel; it’s about the right kind of fuel delivery that can handle the corrosive nature of ethanol and the significantly higher volume required to make big power. I’ve spent countless hours in the garage, wrenching on my own Evo and helping buddies, all in pursuit of reliable E85 performance. Trust me, a robust E85 Evo fuel pump is the heart of a high-performance ethanol setup, and skimping here is a recipe for disaster.

IMAGE	PRODUCT NAME	AMAZON LINK
	MAPerformance Stainless Steel Inline Fuel Filter Compatible…	View on Amazon
	SYKRSS E8547M Fuel Pump Module Assembly Compatible with…	View on Amazon
	OSIAS 380LPH Inline External E85 Compatible Fuel Pump 10AN…	View on Amazon
	AEM 50-1215 E85-Compatible High Flow In-Tank Fuel Pump…	View on Amazon
	EVIL ENERGY External Inline Fuel Pump Electric 300LPH High…	View on Amazon
	QFS Performance 380LPH Inline External E85 Compatible Fuel…	View on Amazon
	EVIL ENERGY External Inline Fuel Pump Electric 300LPH High…	View on Amazon
	OSIAS External Fuel Pump EFI 380LH 1000HP High Flow 12V…	View on Amazon
	Yezoauto 450LPH E85 High Pressure Fuel Pump with…	View on Amazon
	QFS Performance 380LPH Inline External E85 Compatible Fuel…	View on Amazon

This isn’t just a list; it’s a guide born from real-world experience. We’re diving deep into 10 options, from essential supporting components to high-flow beasts, all designed to ensure your Evo gets the consistent, clean fuel it needs. We’ll look at flow rates, installation considerations, and compatibility, helping you pick the best fuel pump for your E85 Evo build, whether you’re chasing street performance or pushing big dyno numbers. Let’s get your Evo running strong on E85.

Detailed Product Reviews

MAPerformance Stainless Steel Inline Fuel Filter Compatible…

While not a fuel pump itself, the MAPerformance Stainless Steel Inline Fuel Filter is an absolutely essential component when upgrading your E85 Evo fuel system, especially with a high-flow pump. Think of it as your fuel pump’s best friend, diligently protecting your fuel injectors from the inevitable debris that can appear with ethanol fuels or from the fuel pump itself. I’ve seen clogged injectors ruin a perfectly good tune and even cause engine damage, so this filter is crucial. Its clever design allows for easy installation right between your factory hard line and the fuel rail, making it a simple yet critical addition to any performance Evo running E85.

Key Features:
– Developed to protect fuel injectors from debris
– Located between factory hard feed line and fuel rail for simple installation
– Features push-on EFI adapter fittings
– Compact billet design with a 40-micron stainless steel element
– Compatible with pump gas and E85
– Flows enough to support nearly 500LPH fuel systems

Pros:
– Essential for injector protection, especially with E85
– Easy to install with included fittings
– Durable stainless steel element
– High flow capacity supports powerful setups
– Reusable and cleanable filter element

Cons:
– An additional purchase, not a pump itself
– Requires space in the engine bay for inline installation

Best for: Any E85 Evo build, particularly those with upgraded fuel pumps and injectors, seeking to protect their investment.

User feedback summary: Many users consider this a mandatory upgrade for E85, praising its quality construction and the peace of mind it offers by preventing injector clogs. Installation is frequently mentioned as straightforward.

SYKRSS E8547M Fuel Pump Module Assembly Compatible with…

For those looking to replace a failing stock pump or maintain a factory-like setup on a mildly modified Evo, the SYKRSS E8547M Fuel Pump Module Assembly is a solid contender. This isn’t a high-horsepower race pump, but rather an OE-standard replacement designed to fit specific Mitsubishi Lancer models (2003-2007 L4 2.0L GAS, 2004-2006 L4 2.4L GAS). If your build isn’t pushing extreme limits but still needs reliable fuel delivery, this assembly aims to match the original specifications for quality, fit, and function. It focuses on quiet operation and consistent fuel flow, which is exactly what you want for a daily driver or light street tune.

Key Features:
– Reference OE Number: Replaces E8547M, FG1654, MN161935, SP4032M, P76738M
– Vehicle Fitment: Compatible with Mitsubishi Lancer 2003-2007 L4 2.0L GAS, 2004-2006 L4 2.4L GAS
– OE Standard: Designed to meet or exceed OE specifications in quality, fit, and function
– Made with new materials under rigorous quality control
– Focuses on quiet operation and long-lasting durability
– Optimized Fuel Efficiency: Offers optimal fuel pressure and flow
– Includes a 1-year unlimited-mileage quality guarantee

Pros:
– Direct fit replacement for specified Lancer models
– Meets OE standards for reliability and function
– Quiet operation
– 1-year warranty provides peace of mind

Cons:
– Not a high-performance upgrade for heavily modified Evos
– Limited to specific vehicle fitment
– May not provide sufficient flow for serious E85 power upgrades

Best for: Stock or mildly tuned Mitsubishi Lancer/Evo models needing an OE-standard replacement fuel pump with factory-like reliability.

User feedback summary: Users appreciate the direct fit and quiet operation, noting it’s a good budget-friendly option for replacing a failed OEM pump without performance expectations. Compatibility should always be double-checked for specific Evo models.

OSIAS 380LPH Inline External E85 Compatible Fuel Pump 10AN…

When you’re stepping up your E85 Evo game and need serious fuel flow, an inline external pump like the OSIAS 380LPH is often the answer. This pump is a workhorse, designed to provide a high volume of fuel, which is crucial for big power numbers on E85. Being an external pump, it requires a bit more custom plumbing compared to an in-tank unit, but it offers flexibility in mounting and can often supplement or replace a factory in-tank pump. The inclusion of 10AN inlet and 8AN outlet fittings means it’s ready for proper AN lines, a common choice in performance fuel systems for their secure, leak-free connections.

Key Features:
– 380 LPH (Liters Per Hour) flow rate
– Inline external design for flexible mounting
– E85 compatible for ethanol blends
– Features a check valve for maintaining fuel pressure
– 10AN Inlet and 8AN Outlet connections
– Replaces or supplements factory in-tank pump for high flow needs

Pros:
– High flow rate suitable for powerful E85 setups
– E85 compatible materials
– AN fittings for secure, high-performance plumbing
– External design offers mounting flexibility
– Includes a check valve

Cons:
– Requires custom installation and plumbing, not a direct drop-in
– Can be noisier than in-tank pumps
– May require additional wiring upgrades

Best for: Heavily modified E85 Evos requiring significant fuel flow beyond what an in-tank pump can provide, especially those with custom fuel systems.

User feedback summary: Reviewers generally praise its high flow and E85 compatibility for the price. Installation is noted as requiring some mechanical skill due to its external, custom nature, but the performance benefits are clear for higher horsepower applications.

AEM 50-1215 E85-Compatible High Flow In-Tank Fuel Pump…

AEM is a name synonymous with performance, and their 50-1215 E85-Compatible High Flow In-Tank Fuel Pump lives up to that reputation. This pump is an excellent choice for Evo owners who want a significant fuel upgrade without the complexities of an external setup. It’s designed for in-tank mounting and boasts a healthy 340 LPH flow rate, making it suitable for a wide range of naturally aspirated and forced induction E85 builds. What I particularly like is that AEM tests every single pump for 340 LPH at 40 PSI before it leaves the factory, so you know you’re getting a reliable, verified performer. Plus, its compact size helps with fitment in various fuel hangers.

Key Features:
– 340 LPH E85-Compatible High Flow
– Designed for in-tank mounting
– Suitable for high-performance naturally aspirated and forced induction vehicles
– Includes wiring harness, pre-filter, and O-rings
– Every pump is tested to flow 340 LPH at 40 PSI
– Compatible with ethanol fuels up to E100, methanol fuels up to M100, and all types of gasoline
– Compact body (39mm diameter x 65mm length)
– Fit type: Vehicle Specific (though universal in-tank fitment for many)

Pros:
– High, verified flow rate for E85 performance
– In-tank design maintains a cleaner, quieter setup than external pumps
– Comprehensive compatibility with various fuels
– Comes with necessary installation accessories
– AEM’s reputation for quality and testing

Cons:
– May require minor modifications to the fuel hanger for some Evo models
– Not the absolute highest flow rate available for extreme builds
– Can be pricier than some generic options

Best for: Evo owners seeking a reliable, high-flow in-tank pump upgrade for E85, suitable for moderate to high horsepower applications without going to an external setup.

User feedback summary: Users consistently praise AEM’s quality and the pump’s consistent performance. Many note that while it might not be a direct drop-in for every single Evo, modifications are usually minimal, and the included accessories are helpful. Its E85 compatibility is a strong selling point.

EVIL ENERGY External Inline Fuel Pump Electric 300LPH High… (Model A)

Here’s another option for an external inline pump, the EVIL ENERGY Electric 300LPH. This unit is designed for 12V DC electric injection systems and offers a solid flow rate for many E85 Evo setups. With a test flow of up to 300 LPH at 43 PSI and 13.5V, it can definitely support a good amount of power. I appreciate that it’s broadly compatible with a variety of fuels, including gasoline, race gas, diesel, and especially E85 and alcohol/ethanol. The recommendation to install it below the tank is a common practice for inline pumps to ensure proper gravity feeding, which helps with longevity and consistent flow.

Key Features:
– Fitment: Only suitable for 12V DC electric injection systems
– Test Flow: 200 LPH (75PSI & 12V); 255 LPH (43 PSI&12V); 300 LPH (43 PSI&13.5V)
– Operating Pressure: 75 PSI
– Operating Temperature Range: -68 °F to 194 °F
– Medium Compatibility: Compatible with gasoline, pump gas, race gas, diesel, E85, and alcohol/ethanol
– Installation: Recommended to install below the tank
– Includes installation instructions

Pros:
– Good flow rate for many performance E85 applications
– Broad fuel compatibility, including E85
– External design offers mounting flexibility
– Includes basic installation instructions
– Wide operating temperature range

Cons:
– Requires custom plumbing and wiring for installation
– Can be noisier than in-tank pumps
– May not be sufficient for extreme horsepower builds

Best for: Evo owners on a budget who need a reliable, externally mounted E85-compatible fuel pump for moderately powerful builds.

User feedback summary: Many users find this pump to be a cost-effective solution for their boosted setups, including some E85 users. While installation can be custom and might require some extra effort, the pump generally performs as expected for its price point.

QFS Performance 380LPH Inline External E85 Compatible Fuel… (Model X)

Quantum Fuel Systems (QFS) has built a solid reputation in the performance fuel world, and their 380LPH Inline External E85 Compatible Fuel Pump aims to be a top-tier choice. This pump is designed for reliability and longevity, with features like balanced volume, pressure, and turbine impeller angle to prevent fuel overheating – a crucial detail often overlooked. With a flow rate of 380 LPH at 43 PSI, it’s certainly capable of feeding hungry E85 Evo engines. What really stands out is QFS’s commitment to quality, including flow-testing every pump and offering a lifetime warranty, which provides immense confidence.

Key Features:
– Engineered for reliability and longevity, preventing fuel overheating
– Flow-tested high-performance fuel pump
– Recommended for vehicles with engine performance upgrades
– Flows 380Lph (100Gph) at 43 Psi, 340Lph (90Gph) at 73 Psi, and 270Lph (71Gph) at 120 Psi
– Durable construction for high-octane fuel stress
– Upgraded polymers, brushes, and commutators for quiet operation
– Lifetime Warranty with dedicated US-based customer service

Pros:
– High flow rate for serious E85 power
– Engineered to prevent fuel overheating, enhancing longevity
– Lifetime warranty provides exceptional peace of mind
– Quiet operation for an external pump
– Made by an American-owned and operated company

Cons:
– Requires custom installation and plumbing
– Potentially higher price point than generic alternatives
– External pumps can still be louder than in-tank options for some users

Best for: Performance-focused E85 Evo owners seeking a highly reliable, high-flow external fuel pump with excellent warranty support for heavily modified engines.

User feedback summary: Users rave about the QFS pumps’ consistent performance and the incredible value of the lifetime warranty. They frequently mention the peace of mind knowing they have a dependable pump that can handle high demands, often citing its surprising quietness for an external unit.

EVIL ENERGY External Inline Fuel Pump Electric 300LPH High… (Model B)

Much like its twin, this EVIL ENERGY External Inline Fuel Pump (let’s call it Model B for distinction) offers robust fuel delivery for your 12V DC EFI system. It shares the same impressive flow rates, providing up to 300 LPH at 43 PSI and 13.5V, making it a strong contender for various E85 Evo builds. Its broad compatibility with gasoline, race gas, diesel, E85, and alcohol/ethanol means you won’t be limited by your fuel choice. Again, the advice to install it below the tank is key for optimal performance and reducing strain on the pump, ensuring it always has a gravity-fed supply.

Key Features:
– Application: Fit for 12V DC EFI system only
– Test Flow: 200 LPH (75PSI & 12V); 255 LPH (43 PSI&12V); 300 LPH (43 PSI&13.5V)
– Operating Pressure: 75 PSI
– Operating Temperature Range: -68 °F to 194 °F
– Medium Compatibility: Compatible with gasoline, pump gas, race gas, diesel, E85, and alcohol/ethanol
– Installation: Recommended to install below the tank
– Includes installation instructions

Pros:
– Solid 300 LPH flow rate for performance builds
– Excellent fuel compatibility, including E85
– External design allows flexible mounting
– Wide operating temperature range for various climates
– Comes with installation instructions

Cons:
– Requires custom lines and wiring
– Can be audibly noticeable compared to an in-tank pump
– Might not be enough for extremely high-horsepower setups

Best for: Budget-conscious Evo enthusiasts who need a capable E85-compatible external fuel pump for moderately upgraded engines and are comfortable with custom installation.

User feedback summary: Similar to Model A, users report good value and performance for the price. They emphasize the need for proper installation, especially regarding the gravity feed recommendation, to get the best results. It’s often chosen for its versatility with different fuel types.

OSIAS External Fuel Pump EFI 380LH 1000HP High Flow 12V…

This OSIAS External Fuel Pump is another strong contender in the high-flow category, boasting a 380 LPH flow rate and the potential to support up to 1000HP, making it a serious option for very powerful E85 Evos. Just like its sibling, it’s specifically for 12V DC electric injection systems and offers robust performance across a wide range of pressures and voltages. The comprehensive fuel compatibility, including E85 and alcohol/ethanol, is a huge plus. The emphasis on proper installation, particularly below the tank for gravity feed, is sound advice and critical for an external pump to perform reliably at its peak.

Key Features:
– Specifically designed for 12V DC electric injection systems
– High flow rate: Up to 255 LPH at 43 PSI/12V, 300 LPH at 43 PSI/13.5V, and 200 LPH at 75 PSI/12V (Note: headline states 380LPH, but description provides varied rates)
– Operating Pressure: Standard 75 PSI
– Operating Temperature Range: -68 °F to 194 °F
– Fuel Compatibility: Compatible with gasoline, pump gas, race gas, diesel, E85, and alcohol/ethanol
– Installation Recommendation: Install below the fuel tank for gravity feeding
– Emphasizes following instructions for specified compatibility conditions

Pros:
– High flow potential suitable for big horsepower E85 builds
– Broad fuel compatibility
– External design for flexible mounting
– Wide operating temperature range
– Robust construction for demanding applications

Cons:
– Specific flow rates provided in description are lower than the headline’s 380LPH, requiring clarification (e.g., this is peak potential, not continuous at all conditions).
– Requires custom fabrication and plumbing
– Can be louder than in-tank pumps

Best for: High-horsepower Evo builds on E85 that need significant external fuel delivery and are prepared for custom fuel system modifications.

User feedback summary: Users generally find this to be a powerful and effective pump for its price, especially for setups pushing higher horsepower numbers. The common feedback points to the necessity of a well-planned installation due to its external nature.

Yezoauto 450LPH E85 High Pressure Fuel Pump with…

When you’re pushing over 800 HP on E85, you need a fuel pump that means business, and the Yezoauto 450LPH E85 High Pressure Fuel Pump steps up to that challenge. This pump is explicitly designed for modern turbocharged applications where a single 255 LPH pump simply won’t suffice. Its impressive 450 LPH flow rate makes it one of the highest-flowing options on this list, capable of supporting some truly wild Evo builds. It also functions as the heart of the fuel delivery system, providing fuel level readings and other critical functions, much like an OEM unit, but with vastly more flow.

Key Features:
– Vehicle Fitment: Compatible with requirements of modern turbocharged applications
– Supports engines with more than 800HP!
– Interchange Part Number: OE# F90000267, TIA485-2, TIA-485-2, F90000274
– Function: Supplies clean pressurized fuel, provides fuel level reading, shuts off nozzle when refueling
– Detailed installation steps provided
– 1-Year Manufacturer Warranty with responsive customer service
– Harshly inspected and 100% tested before assembly

Pros:
– Extremely high 450 LPH flow rate for big power E85 builds
– Designed for high-horsepower turbocharged applications
– Maintains some OEM functions like fuel level reading
– Detailed installation instructions provided
– Rigorous testing and 1-year warranty

Cons:
– May require professional installation due to high-flow nature and potential vehicle-specific modifications
– Potentially higher current draw requires robust wiring
– Less versatile for lower-power applications due to its aggressive flow

Best for: Evo owners running extreme E85 power levels (800HP+) on turbocharged setups who need maximum fuel flow and reliability from a single in-tank pump.

User feedback summary: Users pushing big horsepower numbers commend this pump for its impressive flow and ability to keep up with demanding E85 tunes. They highlight its robust construction, but also stress the importance of a professional installation and upgraded wiring to handle the current draw.

QFS Performance 380LPH Inline External E85 Compatible Fuel… (Model Y)

The QFS Performance 380LPH Inline External E85 Compatible Fuel Pump (Model Y) reinforces Quantum Fuel Systems’ commitment to robust fuel delivery. This iteration, similar to Model X, is meticulously designed to balance volume, pressure, and impeller angle to ensure problem-free operation for over 100,000 miles and to prevent fuel overheating – a key aspect for long-term E85 reliability. With slightly different, yet still impressive, flow figures like 387 LPH at 45 PSI and 346 LPH at 60 PSI, it ensures ample fuel for heavily modified E85 Evos. Their lifetime warranty and US-based customer service are huge confidence boosters for any serious build.

Key Features:
– Engineered for reliability and longevity, preventing fuel overheating over 100,000 miles
– Flow-tested High-Performance Fuel Pump
– Recommended for vehicles with engine performance upgrades
– Flow: 387Lph, Draws 7.2 Amps @ 45Psi
– Flow: 346Lph, Draws 8.7 Amps @ 60Psi
– Durable Construction capable of handling high-octane fuel stress
– Upgraded polymers, brushes, and commutators for quiet operation
– Lifetime Warranty with dedicated US-based customer service

Pros:
– Excellent flow rate for high-horsepower E85 applications
– Exceptional longevity and anti-overheating design
– Industry-leading lifetime warranty and US support
– Relatively quiet for an external pump
– Robust construction for demanding fuel types

Cons:
– Requires custom installation and proper wiring
– Can be a significant investment upfront
– External pumps are always more exposed than in-tank units

Best for: Enthusiasts demanding top-tier reliability and high flow from an external E85-compatible pump, willing to invest in a premium product backed by an extensive warranty for their highly tuned Evo.

User feedback summary: Owners consistently praise the peace of mind offered by the lifetime warranty and the pump’s consistent, strong performance under load. Many report excellent durability even with aggressive E85 use, and the technical support from QFS is frequently highlighted as a major positive.

Helpful Comparison Insights

Navigating the world of E85 Evo fuel pumps can be a bit overwhelming, so let’s break down some key comparisons to help you decide.

First off, we’ve got a mix of in-tank and external (inline) pumps. The AEM 50-1215 and the Yezoauto 450LPH are fantastic in-tank options. In-tank pumps generally offer a quieter operation and a cleaner installation since they reside inside the fuel tank, often within the factory hanger. They’re great for maintaining a somewhat stealthy setup while delivering serious power. The AEM is a solid upgrade for moderate to high horsepower, while the Yezoauto is clearly for the extreme end, supporting 800+ HP with its massive 450 LPH flow.

On the other hand, external inline pumps like the OSIAS 380LPH (both versions), EVIL ENERGY 300LPH (both versions), and QFS Performance 380LPH (both versions) offer greater flexibility in mounting and can sometimes be easier to service or integrate into highly custom fuel systems with surge tanks. However, they typically require more custom plumbing (AN lines, fittings) and can be noticeably louder than their in-tank counterparts. The QFS pumps stand out with their lifetime warranty and emphasis on longevity and preventing fuel overheating, making them a premium choice for external setups.

When it comes to flow rates, this is where your power goals dictate your choice. The SYKRSS E8547M is clearly an OE replacement, suitable for stock or very mild setups – it’s not a performance upgrade. The EVIL ENERGY 300LPH pumps offer a good entry point for performance, capable of supporting a decent increase in power on E85. Stepping up, the AEM 340LPH and the OSIAS/QFS 380LPH pumps are in a very strong category, perfect for a wide range of highly modified E85 Evos. The Yezoauto 450LPH is the clear winner here for sheer volume, targeting serious race builds. Remember, E85 requires about 30-40% more fuel volume than gasoline for the same power, so don’t underestimate your flow needs.

E85 compatibility is non-negotiable for this list, and all the reviewed pumps explicitly state it. However, look for pumps that highlight durable materials (like upgraded polymers, brushes, and commutators in QFS) and stainless steel elements (like in the MAPerformance filter) as these features ensure longevity when exposed to ethanol.

And let’s not forget the MAPerformance Stainless Steel Inline Fuel Filter. While not a pump, it’s a critical component for any E85 setup, especially with high-flow pumps. Ethanol can loosen debris in your tank and lines, and a 40-micron filter like this will protect your expensive injectors from clogging, which can save your engine. It’s a small investment for huge peace of mind.

Lastly, warranties and customer support can make a big difference. QFS stands out with its lifetime warranty and US-based support, offering significant confidence. Yezoauto and SYKRSS offer 1-year warranties, which is standard. Consider how important long-term backing is for your build.

Final Verdict

Alright, let’s wrap this up. Picking the best fuel pump for your E85 Evo really boils down to your specific power goals, budget, and willingness to tackle custom installation.

If you’re rocking a mildly tuned Evo or just need a reliable stock-replacement that meets OEM standards, the SYKRSS E8547M is your straightforward, budget-friendly choice. It’s not for big power, but it’ll get your daily driver humming.

For the vast majority of moderately to heavily tuned Evos running E85 – those chasing anywhere from 400 to 700 horsepower – you’ve got excellent options. The AEM 50-1215 340LPH in-tank pump is an absolute superstar. It offers a great balance of high flow, proven reliability, and a relatively clean in-tank installation, making it a very popular and well-regarded choice. If you prefer an external setup in this power range, or need a bit more flow up to the 700 HP mark, the OSIAS 380LPH external pumps and the QFS Performance 380LPH external pumps are formidable contenders. The QFS pumps, in particular, impress with their build quality, longevity focus, and that incredible lifetime warranty, making them a very smart long-term investment. The EVIL ENERGY 300LPH external pumps are good budget-conscious alternatives for this range if you’re comfortable with custom wiring and plumbing.

Now, if you’re playing in the big leagues, pushing 800+ HP with a seriously turbocharged Evo, there’s a clear winner: the Yezoauto 450LPH E85 High Pressure Fuel Pump. Its sheer flow capability is unmatched on this list, specifically designed for those extreme power levels. You’ll definitely want professional installation and upgraded wiring to harness its potential, but it’s built for the task.

And no matter which pump you choose, for the love of your engine, do not skip the MAPerformance Stainless Steel Inline Fuel Filter. It’s cheap insurance that will protect your expensive injectors and ensure your powerful E85 setup runs cleanly for years to come.

Ultimately, invest wisely. Your E85 Evo deserves a fuel system that can keep up with its demands. Choose a pump that matches your ambitions, and you’ll be enjoying reliable, ethanol-fueled power for miles.

Comprehensive FAQ Section

Q1: Why do I need a special fuel pump for E85 in my Evo?
A1: E85 (ethanol) is more corrosive than gasoline and requires specific fuel system components that are compatible with its chemical properties to prevent premature wear and failure. More importantly, E85 has a lower energy density, meaning your engine needs to burn approximately 30-40% more fuel by volume to produce the same power as gasoline. This significantly higher flow requirement means your stock fuel pump simply can’t keep up with the demand for even moderately tuned Evos. Upgrading to a high-flow, E85-compatible fuel pump is crucial for reliable performance and engine safety.

Q2: What’s the difference between an in-tank and an inline (external) fuel pump for an Evo, and which is better for E85?
A2: In-tank fuel pumps are located inside your fuel tank, usually within the factory fuel hanger. They tend to be quieter, run cooler (submerged in fuel), and offer a cleaner, often more direct, installation. The AEM 340LPH and Yezoauto 450LPH are examples. Inline (external) fuel pumps are mounted outside the fuel tank, typically along the fuel line. They offer more flexibility in mounting and can sometimes provide higher flow rates when combined with an in-tank pump or a surge tank. However, they usually require more custom plumbing, can be louder, and are more exposed to the elements. OSIAS, EVIL ENERGY, and QFS 380LPH pumps are inline options. Neither is inherently “better” for E85; it depends on your specific build, power goals, and installation preferences. For most street-driven Evos, a high-quality in-tank pump is often preferred for its stealth and quietness.

Q3: How much flow (LPH) do I need for my E85 Evo fuel pump?
A3: This depends heavily on your Evo’s horsepower goals and engine setup. As a general rule, calculate your target horsepower on gasoline, then increase that fuel demand by 30-40% for E85. Most stock Evos can barely handle low 300 HP on E85 with a heavily strained stock pump. For mild tunes (350-450 HP), a 255-300 LPH pump might suffice. For serious street/track builds (450-700 HP), you’ll typically need a 340-380 LPH pump. For extreme builds (700 HP+), a 450 LPH or dual pump setup is often required. Always consult with your tuner to determine the precise fuel pump flow rate your specific E85 Evo setup requires.

Q4: Do I need to upgrade other fuel system components when installing a high-flow E85 Evo fuel pump?
A4: Yes, absolutely! A high-flow E85 fuel pump is just one part of the equation. You’ll almost certainly need to upgrade your fuel injectors to a larger size to deliver the increased volume of E85. Additionally, a robust inline fuel filter (like the MAPerformance) is essential for E85 setups to catch debris. You might also need a larger fuel pressure regulator (FPR), upgraded fuel lines (AN lines are popular), and potentially a fuel rail if you’re pushing serious power. Upgrading your wiring harness to the pump is also crucial to ensure it gets adequate voltage and doesn’t overheat.

Q5: Is installation of an E85 Evo fuel pump difficult, and should I do it myself?
A5: Installation difficulty varies. Replacing a direct-fit in-tank module like the SYKRSS might be manageable for an experienced DIYer. However, installing a high-flow in-tank pump (like AEM or Yezoauto) often requires modifying the factory fuel hanger and dealing with wiring, which can be more complex. External inline pumps (OSIAS, EVIL ENERGY, QFS) are generally the most involved, requiring custom lines, fittings, and careful mounting. Given the critical role of fuel delivery and the flammable nature of fuel, if you’re not confident in your mechanical and electrical skills, it’s highly recommended to have a professional shop or tuner perform the installation for your E85 Evo fuel pump upgrade.

Q6: What maintenance tips are there for an E85 Evo fuel pump to ensure longevity?
A6: To maximize the lifespan of your E85 Evo fuel pump:
1. Run a good inline fuel filter: Regularly inspect and replace/clean your fuel filter (like the MAPerformance filter) as E85 can loosen debris in your tank and lines.
2. Avoid running your tank empty: Fuel pumps rely on being submerged in fuel for cooling. Frequently running your tank below a quarter can overheat and shorten the life of your pump.
3. Use proper wiring: Ensure your fuel pump has adequate gauge wiring and a good power source, especially for high-flow pumps, to prevent voltage drops and overheating.
4. Regular tuning checks: Ensure your tune is always optimized for E85. Incorrect AFRs can put undue stress on your fuel system.
5. Use quality E85: Source E85 from reliable stations to ensure consistent ethanol content and minimize contaminants.