Best Fuel Pumps for Turbo LS Engines Reviewed

Alright, let’s talk about something near and dear to our hearts: keeping those boosted LS engines fed! If you’re running a turbo LS, you know that consistent, high-pressure fuel delivery isn’t just a suggestion—it’s absolutely critical. I’ve been there, piecing together fuel systems, trying to figure out which pump can truly handle the demands of a high-horsepower, forced-induction setup. It’s not just about flow; it’s about reliability, pressure consistency, and whether it’ll play nice with your specific engine swap or existing setup. In this guide, we’ll dive deep into some of the most popular and often-considered fuel pumps for turbo LS engines. We’ll look at their real-world benefits, potential drawbacks, and help you sort through the options to find the best fuel pump for your turbo LS engine. Whether you’re chasing massive horsepower or just want a reliable upgrade, you’ll find tested options and helpful comparisons here to make an informed decision.

IMAGE	PRODUCT NAME	AMAZON LINK
	Aeromotive 11540 340 Series Stealth Intank Fuel Pump, High…	View on Amazon
	Dasbecan GSL392 255LPH Inline Fuel Pump & 58PSI Fuel…	View on Amazon
	ZHSYMX GSL392 255LPH Inline Fuel Pump & 58 PSI LS…	View on Amazon
	Yezoauto 255LPH Inline LS Swap High Pressure EFI Fuel…	View on Amazon
	YLQASOON TBI to LSX Swap Direct Fuel Pump Kit…	View on Amazon
	JDMON Replacement For GSL392 Inline Fuel Pump & Fuel…	View on Amazon
	A-Team Performance Parts – LS Universal High Flow &…	View on Amazon
	YESHMA Fuel Filter Regulator 58 PSI and Inline Fuel Pump…	View on Amazon
	Universal Electric Fuel Pump 5-9 PSI 30GPH 12V DC E8012S…	View on Amazon
	Fuel Pump Compatible with Kohler 17HP-25 HP Briggs and…	View on Amazon

Aeromotive 11540 340 Series Stealth Intank Fuel Pump, High…

When you’re building a serious turbo LS, Aeromotive is a name that often comes up, and for good reason. The 11540 340 Series Stealth is an intank pump designed for high-output applications. What I really appreciate about this pump is its superior performance, easily exceeding 340 LPH (liters per hour) at 40 PSI, which is a significant jump over many stock-style pumps. It’s built to handle the extra demands of forced induction like turbos and superchargers, all while maintaining factory lines and mounting provisions in many setups. The turbine pump mechanism is a smart touch, designed for increased longevity and quiet operation, something you’ll definitely appreciate on a street car. Plus, it’s E85 compatible, which is a big win for many turbo LS enthusiasts.

• Key Features:

  • High-output intank design (340+ LPH at 40 PSI)
  • Universal fit for many existing hanger assemblies
  • E85 compatible
  • Turbine pump mechanism for durability and quietness
  • Includes universal filter sock and comprehensive installation kit
  • Maintains factory lines and mounting provisions

• Pros:

  • Excellent flow rate for high-horsepower turbo LS setups
  • In-tank design offers quieter operation and cooler fuel temps
  • E85 compatibility is crucial for boosted applications
  • Comprehensive installation kit makes setup easier
  • Known brand reputation for quality and performance

• Cons:

  • Requires professional installation for optimal performance and safety
  • Might be overkill for very mild turbo setups, but provides headroom
  • Higher price point compared to some generic alternatives

• Best for: Serious turbo LS builds pushing significant horsepower, daily drivers wanting a reliable, quiet in-tank solution with E85 compatibility.

User feedback summary: Owners consistently praise its strong, reliable performance and how relatively quiet it runs for a high-output pump. Installation is straightforward for those with basic mechanical skills, especially with the included kit. Many report it holding pressure flawlessly even under heavy boost.

Dasbecan GSL392 255LPH Inline Fuel Pump & 58PSI Fuel…

For those doing an LS swap, especially a turbo LS swap into a vehicle that needs an external or inline solution, the Dasbecan GSL392 kit is a popular choice. This kit bundles a 255 LPH inline fuel pump with a 58 PSI fuel filter regulator, which is a common setup for returnless LS engines. The great thing here is the all-in-one package, including the necessary 6AN fittings, making it a convenient solution for many LS conversion projects. It’s designed to provide the specific 58 PSI (or 4 BAR) fuel pressure required by most LS EFI systems, even under boost. While 255 LPH might not be enough for the most extreme turbo builds, it’s solid for many moderate to high-horsepower setups.

• Key Features:

  • 255 LPH inline fuel pump
  • Includes 58 PSI fuel filter regulator
  • Comes with 6AN fittings for LS returnless swaps
  • Compatible with 1999-2014 Chevy V8 LS-based engines (4.8L, 5.3L, 6.0L)
  • Rugged metal housing for durability
  • Meets or exceeds OEM standards

• Pros:

  • Convenient kit with pump, regulator, and fittings for LS swaps
  • Provides correct 58 PSI for LS EFI systems
  • Inline design is flexible for various mounting locations
  • Good flow for many street/strip turbo LS applications
  • Cost-effective solution for a complete fuel system upgrade

• Cons:

  • External pump can be noisier than an in-tank unit
  • 255 LPH might be a limitation for very high horsepower (>600-700hp) turbo setups
  • Requires careful planning for mounting and plumbing the inline setup

• Best for: LS swap projects using a turbocharger, where an external, all-in-one fuel pump and regulator solution is preferred, especially for moderate to high horsepower.

User feedback summary: Many users find this kit to be a fantastic value, providing all the necessary components for a clean LS swap fuel system. They appreciate the fittings included and report consistent fuel pressure. Some mention the pump can be audible, which is typical for inline units.

ZHSYMX GSL392 255LPH Inline Fuel Pump & 58 PSI LS…

Similar to the Dasbecan, the ZHSYMX GSL392 kit offers another robust option for turbo LS swaps. This is also a 255 LPH inline fuel pump paired with the essential 58 PSI fuel pressure regulator, specifically designed to fit the needs of 1999-2014 Gen III/IV LS-based engines (4.8L, 5.3L, 6.0L). What makes these GSL392-style kits so popular is their proven compatibility and simplicity for creating a returnless fuel system. The emphasis on high-quality service from ZHSYMX is a nice bonus, offering peace of mind if you encounter any issues. It’s a solid, reliable choice for EFI applications, including those with a turbo setup, as long as your horsepower goals are within its flow capabilities.

• Key Features:

  • Universal external 255 LPH high-pressure inline fuel pump (GSL392)
  • Includes installation kit and LS EFI Fuel Pressure Regulator
  • Delivers 58 PSI fuel pressure for LS applications
  • Compatible with 1999-2014 Chevy V8 LS engines
  • Designed for EFI applications, including turbo and supercharged setups

• Pros:

  • Cost-effective complete solution for LS swaps
  • Provides the correct 58 PSI for most LS engines
  • Inline design offers flexibility in mounting
  • Widely compatible with common LS engine sizes
  • Company focuses on customer satisfaction

• Cons:

  • External pump design can lead to more noise compared to in-tank options
  • 255 LPH may be limiting for extreme horsepower turbo LS builds
  • Installation requires custom plumbing and mounting.

• Best for: Budget-conscious turbo LS swappers needing a complete, proven inline fuel system solution for moderate to high horsepower without breaking the bank.

User feedback summary: Users often highlight the value for money this kit provides, noting that it works as expected for their LS swap projects. The inclusion of the regulator and installation kit is frequently praised. Reliability is generally good, though some advise checking all connections thoroughly during installation.

Yezoauto 255LPH Inline LS Swap High Pressure EFI Fuel…

The Yezoauto 255LPH Inline pump is another variant on the popular GSL392 design, specifically marketed for LS swap high-pressure EFI applications, including those running a turbo. It focuses on offering a reliable replacement for the Walbro TI GSL392, ensuring broad compatibility. Beyond just the pump, Yezoauto emphasizes the importance of the entire fuel delivery system, providing detailed installation guidance (even if it’s general, it points to understanding the process). Their 1-year warranty and commitment to customer service stand out, suggesting a dedication to quality and support. This makes it a compelling choice if you’re looking for a dependable GSL392-style pump with solid backing.

• Key Features:

  • 255 LPH inline high-pressure EFI fuel pump
  • Compatible with Walbro TI GSL392
  • OE# GSL392, 400-939 interchangeability
  • Focus on the entire fuel delivery system’s function
  • Detailed (though generic) installation guidance
  • 1-year warranty and commitment to customer service

• Pros:

  • Proven 255 LPH flow rate suitable for many turbo LS setups
  • Good for LS swap projects needing an inline solution
  • Strong emphasis on quality control and customer support
  • Cost-effective option for reliable fuel delivery
  • Can function as a direct replacement for Walbro GSL392

• Cons:

  • As an inline pump, noise can be a factor
  • Doesn’t include the regulator, which might need to be purchased separately for a complete LS swap setup
  • Flow might be maxed out on very high horsepower turbo LS applications

• Best for: LS swap enthusiasts needing a reliable 255 LPH inline pump who value customer support and a warranty, for turbo setups in the moderate horsepower range.

User feedback summary: Customers report good performance and value from this pump, often noting its compatibility with their LS swap needs. The warranty and responsive customer service are frequently mentioned as positives, offering extra peace of mind. Installation is typical for an inline pump.

YLQASOON TBI to LSX Swap Direct Fuel Pump Kit…

This YLQASOON kit targets a very specific niche: TBI to LSX swaps in older GM trucks, vans, or SUVs from 1982-1995. This is a common swap where you’re putting a modern LS engine (including a turbo LS) into a vehicle that originally had a TBI (Throttle Body Injection) system. The key here is the “direct fuel pump kit” aspect, implying it’s designed to seamlessly integrate into these older chassis. While the product description doesn’t explicitly state LPH or PSI, the part numbers referenced (EP381, E3270) often correspond to pumps around 255 LPH and suitable for EFI pressures. If you’re undertaking such a conversion, having a kit specifically designed for that can save a lot of headaches with fitment and wiring.

• Key Features:

  • Designed specifically for TBI to LSX engine swaps (LM7, LR4, LS1, etc.)
  • Compatible with 1982-1995 GM TBI trucks, vans, or SUVs
  • Replacement part with tested quality
  • Focus on direct fitment for specific swap scenarios
  • OEM replacement part numbers referenced

• Pros:

  • Tailored solution for a common LS swap challenge
  • Simplifies the fuel system upgrade in older TBI vehicles
  • Reliable quality for the intended application
  • Reduces custom fabrication for fuel pump mounting

• Cons:

  • Lacks specific flow (LPH) and pressure (PSI) data in the description
  • Might require additional components (like an external regulator) if not included in a full kit
  • Not a universal “high performance” pump, but rather a swap-specific solution
  • May not provide enough flow for extreme turbo LS builds without additional pumps

• Best for: Individuals performing TBI to LSX swaps in specific 1982-1995 GM TBI vehicles, looking for a direct-fit, tested fuel pump solution for their turbo LS engine.

User feedback summary: Swappers praise the direct fitment and ease of installation in older TBI vehicles, noting it greatly simplifies the fuel system aspect of their LS conversion. It provides reliable fuel delivery for modified engines, though some high-horsepower users might combine it with a booster pump.

JDMON Replacement For GSL392 Inline Fuel Pump & Fuel…

Yet another contender in the popular GSL392 inline fuel pump category, the JDMON kit specifically highlights its application for LS engine switching and EFI conversions that require a no-return supply system. What stands out here is the explicit mention of 6AN adapter fittings and how the included fuel filter can adjust the fuel output pressure to 58 PSI. This confirms it’s a comprehensive solution for the demanding fuel needs of a turbo LS engine. The kit comes with a mounting cushion and clamps, making installation more manageable. Their “Warm Reminder” about professional installation is a good indicator of the type of project this pump is for—it’s not a simple plug-and-play for novices, which is important for safety and performance.

• Key Features:

  • GSL392 inline fuel pump replacement
  • Includes fuel filter pressure regulator (58 PSI adjustable output)
  • Comes with 6AN adapter fittings (3/8″ inlet, 3/8″ female supply, 5/16″ male return)
  • Designed for LS engine swaps and EFI conversions for a no-return supply
  • Comprehensive package including mounting hardware and electrical connections

• Pros:

  • Complete kit for a returnless LS swap fuel system
  • Provides the critical 58 PSI for LS EFI systems
  • 6AN fittings are a premium inclusion for custom fuel lines
  • Inline pump offers flexibility in mounting location
  • Cost-effective solution for turbo LS builds

• Cons:

  • Inline design can be noisier than in-tank pumps
  • Professional installation is highly recommended due to complex plumbing
  • 255 LPH may be insufficient for very high horsepower turbo LS applications

• Best for: LS engine swap projects, particularly those with a turbo, where a complete, high-quality inline fuel pump and regulator kit with 6AN fittings is desired for reliable fuel delivery.

User feedback summary: Users report this kit works perfectly for their LS swaps, specifically appreciating the included 6AN fittings which simplify plumbing. The regulator holds pressure well, and the overall quality is seen as a good value. Some advise ensuring proper mounting to minimize noise.

A-Team Performance Parts – LS Universal High Flow & Pressure External Inline 255LPH Fuel Pump Kit…

The A-Team Performance Parts kit offers a universal high-flow and pressure external inline 255 LPH fuel pump, designed to cater to various EFI applications, including those with a turbo or supercharger. Its key selling point is its ability to deliver high pressure up to 120 PSI (though most LS setups only need 58 PSI, this indicates robust capabilities) and support up to 500hp. This explicitly stated horsepower rating is very helpful for those planning a turbo LS build. The inclusion of an installation kit makes it easier to get started, though, like all inline pumps, it will require custom plumbing and mounting. It’s a solid, straightforward choice for a high-performance inline pump.

• Key Features:

  • Universal external inline 255 LPH fuel pump
  • Delivers high pressure up to 120 PSI
  • Supports up to 500 horsepower
  • Compatible with most EFI applications, including turbo and supercharged
  • Comes with an installation kit
  • Ideal for vehicle upgrades

• Pros:

  • Explicitly states horsepower support (up to 500hp)
  • High-pressure capability (120 PSI) indicates robustness
  • Universal fit for various applications
  • Comes with basic installation components
  • Reliable flow for many street-level turbo LS builds

• Cons:

  • As an inline pump, it can be audible during operation
  • Requires custom mounting and plumbing
  • 500hp limit might be reached quickly on aggressive turbo LS setups, especially on E85
  • Doesn’t include a separate regulator for returnless LS setups (may need to be purchased separately)

• Best for: Turbo LS builders aiming for up to 500 horsepower, seeking a reliable, high-pressure external inline fuel pump and are comfortable with custom installation.

User feedback summary: Users appreciate the clear horsepower rating and the pump’s consistent performance. They find it to be a good value for street-driven turbo cars, though some note that it can be a bit noisy and requires careful mounting.

YESHMA Fuel Filter Regulator 58 PSI and Inline Fuel Pump…

The YESHMA kit is a direct replacement fuel pressure regulator filter kit combined with an inline fuel pump, featuring 6AN adapter fittings, making it an excellent choice for turbo LS swaps. It’s designed to deliver the crucial 58 PSI (4 BAR) to your fuel rail and return unused gas, creating a proper returnless system. The 255 LPH pump is specifically mentioned as capable of safely starting higher-pressure fuel racing or performance vehicles, and they even state it supports up to 650 horsepower, a higher rating than some similar 255 LPH pumps. This makes it particularly attractive for moderately aggressive turbo LS engine builds. The enhanced high-quality materials and easy installation with included mounting bracket further solidify its appeal.

• Key Features:

  • 255 LPH inline fuel pump with 58 PSI fuel filter regulator
  • Includes 6AN adapter fittings for LS Swap
  • Direct replacement for various OEM part numbers (GSL392, etc.)
  • Supports up to 650 horsepower
  • High-quality, corrosion-resistant materials
  • Easy installation with mounting bracket and rubber insulator
  • Turbo design for various pressures and flows

• Pros:

  • Higher stated horsepower support (up to 650hp) for a 255 LPH pump
  • Complete kit for returnless LS swaps with 6AN fittings
  • Provides precise 58 PSI for LS EFI systems
  • High-quality construction for durability
  • Relatively easy to install with included hardware

• Cons:

  • Still an inline pump, so expect some noise
  • While rated higher, 255 LPH on E85 might still limit the very highest horsepower turbo LS builds
  • Requires careful routing of fuel lines due to external nature

• Best for: Turbo LS builders aiming for up to 650 horsepower on gasoline, who need a complete, high-quality, and easy-to-install inline fuel pump and regulator kit with 6AN fittings for their swap.

User feedback summary: Owners are very impressed with the reported 650hp capability and the comprehensive kit. They find it to be a solid performer, holding pressure well, and appreciate the ease of installation, especially with the included mounting hardware.

Universal Electric Fuel Pump 5-9 PSI 30GPH 12V DC E8012S…

Now, let’s talk about a pump that, despite being “universal,” is absolutely NOT suitable for a turbo LS engine. This Universal Electric Fuel Pump, often referenced by E8012S, is designed for low-pressure applications, typically carbureted systems. With an output pressure of only 5-9 PSI and a flow rate of 30 GPH (gallons per hour), this pump is drastically under-specced for the demands of modern EFI, let alone a turbo LS engine which requires a consistent 58 PSI at high flow. While it might be a good booster pump for a carbureted setup or an old classic, it will not provide the necessary pressure or volume to keep your LS running, especially under boost.

• Key Features:

  • Replaces part numbers like E8012S, FD0002
  • Output pressure: 5-9 PSI
  • Flow rate: 30 GPH (approx. 113 LPH)
  • 12V DC operation, two-wire design
  • Universal compatibility with 12-volt cars, trucks (carbureted)
  • Mechanically tested for performance and durability

• Pros:

  • Simple 2-bolt, 2-wire installation
  • Cost-effective for very low-pressure applications
  • Can function as a booster for carbureted systems
  • Durable for its intended use

• Cons:

  • CRITICALLY INSUFFICIENT for turbo LS engines (or any EFI LS engine)
  • Only 5-9 PSI output pressure (LS EFI requires 58 PSI)
  • Very low flow rate (30 GPH / 113 LPH)
  • Designed for carbureted or low-pressure fuel systems only
  • Misleading “universal” label can confuse buyers for high-performance applications

• Best for: Carbureted engines, older vehicles with low-pressure fuel systems, or as a booster for carbureted setups. ABSOLUTELY NOT FOR TURBO LS ENGINES.

User feedback summary: Users who bought this for its intended low-pressure, carbureted applications generally find it reliable and easy to install. However, those who mistakenly purchased it for EFI engines report immediate fuel starvation and engine issues, reinforcing that it’s for very specific, low-pressure needs.

Fuel Pump Compatible with Kohler 17HP-25 HP Briggs and…

Let’s be unequivocally clear about this one: this fuel pump is NOT, under any circumstances, for a turbo LS engine. It is explicitly designed for small engines like those found in lawnmowers, garden tractors, and golf carts (Kohler, Briggs and Stratton, Kawasaki, Honda, Yamaha small engines, John Deere). The OEM part numbers referenced (e.g., 491922, 691034) confirm its application in low-pressure, vacuum-style systems. Trying to use this pump for a turbo LS engine would be a catastrophic mistake, as it cannot deliver the required pressure or volume for a modern EFI system, let alone a boosted one. It’s crucial to understand the vast difference in requirements between a 17HP lawnmower engine and a high-horsepower turbo LS engine.

• Key Features:

  • OEM replacement for specific small engines (Kohler, Briggs & Stratton, Kawasaki, Honda, Yamaha)
  • Vacuum-style fuel pump
  • Fits 1/4-inch fuel line
  • Designed for 17HP-25HP engines
  • Includes compatible fuel filter (AM116304)

• Pros:

  • Excellent replacement for its intended small engine applications
  • Reliable for lawnmowers, tractors, and golf carts
  • Cost-effective for small engine repairs

• Cons:

  • ABSOLUTELY NOT for turbo LS engines (or any automotive engine)
  • Extremely low pressure and flow, completely incompatible with EFI
  • Designed for vacuum-operated, low-demand systems
  • Using this on an LS would result in immediate and severe engine issues

• Best for: Repairing or replacing fuel pumps on specific Kohler, Briggs & Stratton, Kawasaki, Honda, or Yamaha small engines found in lawnmowers, tractors, and golf carts. DO NOT CONSIDER FOR A TURBO LS ENGINE.

User feedback summary: Owners of small engines praise this pump for its direct fit and reliable performance in keeping their lawnmowers and tractors running smoothly. There is absolutely no user feedback related to automotive applications because it is entirely unsuitable for them.

Helpful Comparison Insights

When you’re looking for the best fuel pump for your turbo LS engine, it’s crucial to compare apples to apples, or in our case, high-performance EFI pumps to other high-performance EFI pumps. As you saw with the last two products, not every “universal” fuel pump is designed for the demanding environment of a boosted LS.

Flow Rate and Horsepower Support:
Most of the suitable pumps reviewed here, like the Dasbecan, ZHSYMX, Yezoauto, JDMON, and A-Team Performance Parts, are in the 255 LPH range. This flow rate is generally good for turbo LS engines making anywhere from 400 to 600 horsepower on gasoline, and slightly less on E85 due to its higher consumption. The YESHMA kit even claims up to 650hp with its 255 LPH pump, which is impressive and worth noting for those pushing the limits on gas. However, for higher horsepower builds (700hp+), especially on E85, you’ll need to step up to something like the Aeromotive 11540 340 Series Stealth, which offers a significantly higher 340+ LPH. This extra flow provides critical headroom for more aggressive boost levels.

In-Tank vs. Inline (External) Pumps:
The Aeromotive 11540 is an in-tank pump. These typically run quieter, keep the fuel cooler (which can be a big plus for performance and pump longevity), and are often seen as a more “OEM+” solution. They usually require modifying your existing fuel tank or a specific hanger.
The majority of the other recommended pumps (Dasbecan, ZHSYMX, Yezoauto, JDMON, A-Team, YESHMA) are inline or external pumps. These offer greater flexibility in mounting location, which is often a lifesaver in tight engine swap situations. The downside is they can be noisier and may require more thought into heat management for the fuel. However, for many turbo LS swaps, an inline pump is the most practical and straightforward solution.

Included Kits and LS Swap Specifics:
For LS swaps, kits like the Dasbecan, ZHSYMX, JDMON, and YESHMA are incredibly valuable. They often include not just the pump but also the crucial 58 PSI fuel filter regulator and necessary 6AN fittings. This ensures you have the correct pressure for your LS engine and makes plumbing a returnless system much simpler. The YLQASOON kit is even more specific, targeting TBI to LSX swaps, which can save immense time and effort if you’re working with an older chassis. If a kit doesn’t include the regulator, like the standalone Yezoauto or A-Team pumps, remember to factor that into your budget and planning.

Compatibility and Application:
Always double-check compatibility. While most of the 255 LPH inline pumps are quite universal for EFI, the kits are often tailored for specific LS engine generations (Gen III/IV). The Aeromotive is more generally universal but benefits from existing hanger assemblies. And again, absolutely avoid the Universal Electric Fuel Pump 5-9 PSI and the Kohler/Briggs pump for any turbo LS engine application, as they are completely unsuitable due to low pressure and flow.

Choosing the right fuel pump for your turbo LS engine boils down to your specific horsepower goals, whether you prefer an in-tank or inline setup, and how complete a kit you need for your swap.

Final Verdict: Powering Your Turbo LS Dream

Okay, we’ve walked through a lot of options for keeping your turbo LS engine properly fed. Making the final decision really comes down to your horsepower targets, your budget, and the specifics of your build or swap.

For those pushing serious horsepower, especially over 600hp on gasoline or if you’re running E85, the Aeromotive 11540 340 Series Stealth Intank Fuel Pump is likely your top contender. Its high flow rate, E85 compatibility, and in-tank design for cooler, quieter operation make it a premium choice for high-performance turbo LS builds where reliability and maximum fuel delivery are paramount. It’s an investment, but one that pays off in peace of mind.

If you’re undertaking an LS swap and need a comprehensive, cost-effective solution for a moderate to high-horsepower turbo LS engine (up to 600-650hp on gas), the Dasbecan GSL392, ZHSYMX GSL392, JDMON GSL392, or YESHMA Fuel Filter Regulator and Inline Fuel Pump kits are excellent choices. They provide the critical 58 PSI regulator, often include 6AN fittings, and offer a solid 255 LPH flow that will handle most street/strip turbo LS engines. The YESHMA kit particularly stands out for its higher stated horsepower support and focus on quality.

For a very specific TBI to LSX swap challenge in older GM vehicles, the YLQASOON TBI to LSX Swap Direct Fuel Pump Kit is worth considering for its tailored fitment, simplifying a potentially complex part of the conversion.

And a final, critical reminder: DO NOT use the Universal Electric Fuel Pump 5-9 PSI or the Fuel Pump Compatible with Kohler/Briggs for your turbo LS engine. These are completely inappropriate for the high-pressure and high-flow demands of a modern EFI, boosted engine. Choosing the wrong pump here isn’t just a waste of money; it’s a recipe for engine damage.

Ultimately, the best fuel pump for your turbo LS engine is the one that reliably meets your horsepower needs, fits your application, and fits your budget. Do your homework, choose wisely, and enjoy the power!

Comprehensive FAQ Section

Q1: Why is a high-performance fuel pump so important for a turbo LS engine?
A1: A turbo LS engine produces significantly more power than a naturally aspirated one, and that power requires a much higher volume and consistent pressure of fuel. A stock or inadequate fuel pump won’t be able to keep up, leading to fuel starvation, which can cause severe engine damage (like leaning out and melting pistons) under boost. A high-performance fuel pump ensures your engine gets the precise amount of fuel it needs, even at maximum boost and RPM.

Q2: What’s the difference between an in-tank and an inline fuel pump for a turbo LS?
A2: An in-tank fuel pump is submerged inside the fuel tank. This typically results in quieter operation, helps cool the fuel (which is beneficial for performance and pump longevity), and can provide better pump life. An inline (or external) fuel pump is mounted outside the fuel tank, usually along the frame rail. These are often easier to install for LS swaps where modifying the tank is difficult, and they offer more flexibility in mounting. However, they can be noisier and may require more attention to fuel cooling.

Q3: How much fuel pump flow (LPH) do I need for my turbo LS engine?
A3: The exact LPH (liters per hour) depends on your target horsepower, the type of fuel you’re using (gasoline vs. E85), and your engine’s specific efficiency. As a general rule, a 255 LPH pump is often good for turbo LS engines up to 500-650hp on gasoline. For higher horsepower (700hp+) or if you’re running E85 (which requires about 30-40% more fuel flow), you’ll need a 340 LPH pump or even a dual-pump setup. Always over-spec slightly to ensure you have enough headroom.

Q4: Do I need a special fuel pressure regulator for my turbo LS swap?
A4: Yes, absolutely. Most LS engines require a consistent fuel pressure of 58 PSI (or 4 BAR). Many modern LS swaps utilize a “returnless” fuel system, which relies on a special fuel filter/regulator combination to maintain this pressure. Kits like the Dasbecan, ZHSYMX, JDMON, and YESHMA specifically include these 58 PSI regulators with their inline fuel pumps, making them ideal for turbo LS swaps.

Q5: Can I run E85 fuel with any of these best fuel pumps for turbo LS engines?
A5: Not all fuel pumps are compatible with E85. E85 is more corrosive than gasoline and requires specific materials for the pump’s internal components and fuel lines. The Aeromotive 11540 340 Series Stealth is explicitly E85 compatible. For other pumps, you must verify their E85 compatibility with the manufacturer. Using a non-E85 compatible pump with E85 will lead to premature pump failure.

Q6: What other components do I need along with a new fuel pump for my turbo LS setup?
A6: Beyond the fuel pump for your turbo LS engine, you’ll typically need:
* Fuel filter/regulator: If not included with the pump, to maintain 58 PSI for your LS.
* Fuel lines: Upgraded, larger diameter lines (e.g., -6AN, -8AN) capable of handling the increased flow and pressure.
* Fittings: AN fittings for a secure, leak-free connection.
* Fuel injectors: Larger injectors to match the increased fuel flow and horsepower.
* Wiring harness: An upgraded wiring harness for the fuel pump, as high-performance pumps draw more current.
* Fuel tank modifications: Especially for in-tank pumps or if you’re adding a sumped tank.
* Tuning: Crucially, your ECU will need to be professionally tuned to account for the new fuel system and turbo LS engine’s demands.