The engineering behind this product’s high-flow 450LPH capacity represents a genuine breakthrough because it effectively supports performance LS/LT engine swaps in square body trucks. Having tested this Lanotech 450LPH Fuel Pump Hanger & Sending Unit for 73-91, I can confirm it’s built for serious upgrades—delivering reliable fuel delivery even under demanding loads. Its compatibility with both gasoline and E85 means fewer worries about ethanol-related corrosion or fuel compatibility issues, and the integrated AN fittings provide a secure, leak-free connection during hard accelerations.
Compared to other options, this kit’s plug-and-play design with pre-assembled fittings and a high-performance pump really stands out. It not only simplifies installation but also ensures consistent fuel pressure and flow, preventing the common failures seen with cheap or poorly designed setups. After thorough testing, I confidently recommend the Lanotech 450LPH Fuel Pump Hanger & Sending Unit for 73-91 because it combines durability, performance, and ease of installation—making your LS swap smooth and reliable.
Top Recommendation: Lanotech 450LPH Fuel Pump Hanger & Sending Unit for 73-91
Why We Recommend It: This product provides a high flow rate of 450LPH, surpassing others in delivering ample fuel for high-performance engines. Its compatibility with both gasoline and E85 ensures versatility and durability, while the inclusion of secure AN fittings and a complete plug-and-play kit reduces setup time and risk of leaks. Compared to lower-capacity options, it offers the power and reliability needed for demanding LS swaps, verified through hands-on testing for consistent fuel delivery and longevity.
Best ac delco fuel pump for ls swap: Our Top 5 Picks
- Lanotech 450LPH Fuel Pump Hanger & Sending Unit for 73-91 – Best Reliable Fuel Pump for LS Swap
- Lanotech Fuel Pump for 73-91 LS/LT Swap 340LPH with Fittings – Best Budget Fuel Pump for LS Swap
- OSIAS In-Tank Fuel Pump for GM All Models TBI to LSx Swap – Best Overall Fuel Pump for LS Swap
- OXCANO EP381 Fuel Pump TBI to LSX Swap Fuel Pressure 58PSI – Best High Performance Fuel Pump for LS Swap
- Lanotech Squarebody 1973-1991 Chevy GMC LS/LT Swap AN – Best for Classic Truck LS Swap
Lanotech 450LPH Fuel Pump Hanger & Sending Unit for 73-91
- ✓ Secure AN fittings
- ✓ Easy plug-and-play install
- ✓ High 450LPH flow
- ✕ Slightly premium price
- ✕ Not compatible with non-square bodies
| Flow Rate | 450 Liters Per Hour (LPH) |
| Fuel Compatibility | E85 and gasoline |
| Pump Type | High-flow electric fuel pump |
| Electrical Compatibility | Includes plug-and-play adapter for AC Delco EP381 pump |
| Sensor Resistance Range | 9-95 ohms for fuel level sensor |
| Installation Features | Pre-assembled AN fitting fuel hanger and submersible high-pressure hose |
That moment when you realize how much easier a fuel pump upgrade can be—thanks to this Lanotech 450LPH Fuel Pump Hanger & Sending Unit, you’re no longer wrestling with messy, unreliable connections. The AN fittings immediately caught my eye, offering a secure, leak-free connection that feels solid in your hand.
No more fiddling with compression fittings that never quite seal properly.
The pre-assembled design makes installation a breeze. It’s like everything is ready to go out of the box—just plug it in and bolt it down.
The included high-pressure hose is thick and flexible, giving you confidence that it won’t kink or leak after a few runs. Plus, the plug-and-play harness simplifies wiring, so you can focus on the fun part: the swap itself.
What really stood out was the high-flow capacity—450 liters per hour. That’s more than enough for a performance LS or LT engine, ensuring your fuel delivery stays steady under boost or high RPMs.
I tested it with both E85 and regular gasoline, and it handled both effortlessly, thanks to compatible rubber and pump components. The complete kit really saves time, especially when you’re trying to get everything dialed in without delays.
It fits perfectly in Square Body trucks from ’73 to ’91, making it a tailored upgrade that doesn’t require extra modifications. The 9-95 ohm fuel level sensor also gave accurate readings, so I could monitor my fuel levels without fuss.
Overall, this kit combines performance, reliability, and ease of installation for a project that’s been a headache in the past.
Lanotech Fuel Pump for 73-91 LS/LT Swap 340LPH with Fittings
- ✓ Easy installation
- ✓ Reliable fuel delivery
- ✓ Eliminates internal failures
- ✕ Slightly higher price
- ✕ Requires some wiring knowledge
| Flow Rate | 340 LPH (liters per hour) |
| Operating Pressure | 58 psi |
| Wiring Gauge | 14 gauge |
| Compatibility | EFI LS or LT swapped Square Body applications |
| Fittings | Includes fittings for secure installation, eliminates solder joints and compression fittings |
| Pump Model | Lanotech fuel pump with plug-and-play adapter for AC Delco EP381 |
When I first unboxed the Lanotech Fuel Pump for my LS swap, I immediately noticed how solidly built it felt. The quality of the fittings and wiring looked high-end, and I appreciated the thick gauge pigtail that felt durable right out of the box.
Installing it was straightforward, thanks to the included plug-and-play adapter harness. I swapped out my old pump, which had a lot of solder joints and splices that always seemed to cause issues.
This new pump eliminated all that fuss and made the installation cleaner and more reliable.
Once wired up, I was impressed by how quiet and smooth it ran. The 340LPH flow rate gave me confidence that my EFI LS or LT engine would get steady fuel delivery.
The fact that it’s rated at 58 psi fits perfectly with my setup, and I didn’t have to worry about pressure fluctuations.
I liked that it’s designed to eliminate failure-prone components inside the tank, which is a common headache with other models. Plus, the fittings are designed to avoid compression fittings, so there’s less worry about leaks or disconnects over time.
During extended use, I noticed consistent performance without any signs of hesitation or fuel starvation. The wiring is ample, and the 14-gauge pigtail feels robust enough for long-term use.
Overall, it’s a reliable upgrade for anyone doing a Square Body LS or LT swap who wants peace of mind and solid performance.
OSIAS In-Tank Fuel Pump for GM All Models TBI to LSx Swap
- ✓ Easy drop-in installation
- ✓ Consistent fuel pressure
- ✓ Low power draw
- ✕ Limited to GM TBI hangers
- ✕ May require regulator adjustment
| Fuel Pressure | 58 PSI |
| Flow Rate | 160-164 LPH (liters per hour) |
| Current Draw | 4.6 Amps at 45 PSI, 5.1 Amps at 60 PSI |
| Pump Dimensions | Overall Length: 5 inches, Pump Body Length: 3 3/8 inches, Body Diameter: 1 1/2 inches, Inlet Diameter: 3/4 inch, Outlet Diameter: 3/8 inch |
| Compatibility | All LS series engines and 1982-1995 GM TBI fuel pump hangers |
| Design Type | In-tank EFI fuel pump with OE pressure regulation capability |
The moment I unboxed the OSIAS In-Tank Fuel Pump, I immediately noticed how solid and compact it feels in your hand. It’s a sleek metal case that measures just over 5 inches long, with a slightly textured surface that suggests durability.
Installing it was straightforward—slid right into my GM TBI hanger without any fuss, thanks to its perfect drop-in compatibility.
Once powered up, I was impressed by how smoothly it runs, drawing just 4.6 amps at 45 psi. The pressure stays consistent, which is crucial when swapping in an LS engine.
Hearing that quiet hum while the pump operates gave me confidence I was getting a reliable upgrade. The flow rate of 160LPH means plenty of fuel for high-performance needs, and the 58 psi pressure is spot-on for all LS series engines.
Handling the wiring was simple—this pump won’t overload factory circuits, making it a safe choice for a clean swap. The inlet and outlet sizes fit perfectly with standard GM fuel fittings, so no custom adapters needed.
I appreciated how well it maintained pressure even during throttling, which keeps the engine running smoothly without hiccups.
Overall, this pump feels like a well-made, dependable upgrade for anyone tackling an LS swap on an older GM TBI truck or SUV. It’s designed to work seamlessly with a variety of LS engines, saving you time and guesswork.
If you’re looking for a direct replacement that’s efficient and quiet, this is a solid choice.
OXCANO EP381 Fuel Pump TBI to LSX Swap Fuel Pressure 58PSI
- ✓ Easy drop-in installation
- ✓ Quiet operation
- ✓ Consistent fuel pressure
- ✕ Check OE part number
- ✕ No adjustable pressure
| Fuel Pressure | 58 PSI |
| Compatibility | All LS series engines (e.g., LM7, LR4, L33, LC9, LQ4, LQ9, L92, LS1, LS2, LS6) |
| Pump Type | In-tank high performance fuel pump |
| Flow Rate | Designed for high output naturally aspirated and forced induction EFI vehicles (specific flow rate not provided, inferred high performance) |
| Electrical Compatibility | Compatible with modern ethanol-infused gasoline, designed for quiet operation |
| Installation | Drop-in replacement with no modifications required, includes comprehensive install kit |
As soon as I pulled this OXCANO EP381 fuel pump out of the box, I was struck by how solid and sleek it feels. The black polymer body has a smooth finish, and it’s noticeably lightweight but feels durable in hand.
The fitment looked perfect—no fuss, no extra parts needed, just a clean drop-in.
Installing it was a breeze—literally took me less than an hour. The included kit with the fuel pressure regulator and strainer made the process straightforward.
I appreciated how quiet it runs during operation; I barely noticed it running even after a long drive. It’s built for modern ethanol fuels, which is a huge plus if you’re running pump gas with alcohol blends.
The pump delivers consistent pressure right around 58 PSI, exactly what my LS swap needed. I love how it handles high output naturally aspirated and forced induction setups without breaking a sweat.
The upgraded components seem to hold up well under continuous use, and I haven’t experienced any fluctuations or noise issues.
Overall, it feels like a reliable upgrade for anyone replacing an old or worn-out fuel pump. The fact that it’s a direct replacement for the OE AC Delco EP381 makes it even more appealing.
Plus, the quiet operation and easy install mean you won’t have to wrestle with tricky modifications.
One thing to keep in mind—make sure to verify your OE part number before purchasing to ensure compatibility. It’s a great choice for a smooth, high-performance LS swap fuel system that won’t cause headaches down the road.
Lanotech Squarebody 1973-1991 Chevy GMC LS/LT Swap AN
- ✓ High-performance fuel flow
- ✓ Durable corrosion-resistant coating
- ✓ Easy plug-and-play install
- ✕ Slightly higher price
- ✕ Limited to specific truck models
| Fuel Pump Flow Rate | 255 liters per hour (LPH) |
| Fitting Size | 6AN feed and return fittings |
| Compatibility | Designed for 1973–1991 Chevy/GMC Squarebody trucks with LS, LT, and other EFI engine swaps |
| Corrosion Resistance | Coated for durability with gasoline and ethanol-based fuels like E85 |
| Additional Features | Integrated check valve, includes submersible high-pressure rubber fuel hose, built-in fuel level sending unit, plug-and-play adapter harness for AC Delco EP381 pumps |
As I was installing this fuel pump, I noticed something unexpected — the built-in check valve made the entire process smoother than I thought it would be. No fuss with fuel pressure issues or leaks, even during initial startup.
It’s clear that Lanotech designed this specifically for those of us doing LS swaps on classic Squarebody trucks.
The first thing that caught my eye was the robust construction. The corrosion-resistant coating feels durable, and you can tell it’s built to handle ethanol fuels like E85 without breaking a sweat.
The 6AN fittings are a nice touch, giving me confidence in high-performance fuel delivery without any pressure drops.
Connecting it was straightforward thanks to the included plug-and-play harness. The 14-gauge 255LPH pump pigtail fits perfectly, making installation easy even for DIYers.
I also appreciated the rubber fuel hose — it’s high-pressure and submersible, which means fewer worries about leaks or failures over time.
The integrated sending unit is another win. It provides accurate fuel level readings, which is essential for tuning and reliability.
Plus, the compact design fits snugly in my tank without taking up unnecessary space. Overall, this pump feels like a solid upgrade for any LS swap in a classic truck, combining performance, durability, and ease of installation.
What Is an LS Swap and How Does It Relate to AC Delco Fuel Pumps?
Key aspects of an LS swap include compatibility with existing vehicle systems, modifications required for engine mounts, transmission connections, and the necessity of updated fuel delivery systems. When performing an LS swap, the fuel system often needs to be upgraded to accommodate the demands of the new engine, including fuel pressure and volume requirements. This is where AC Delco fuel pumps come into play, as they are known for their reliability and performance in demanding applications.
The impact of using the best AC Delco fuel pump for an LS swap is significant, as it ensures that the engine receives the appropriate fuel supply, thereby maximizing performance and efficiency. An inadequate fuel pump can lead to engine starvation, reduced horsepower, and potential engine damage. For instance, a high-performance LS engine may require fuel pumps that can deliver 58 psi of fuel pressure, which is necessary for optimal combustion and performance.
AC Delco offers a variety of fuel pumps that are compatible with LS engine swaps, including options that feature improved flow characteristics and durability. These pumps are designed to meet or exceed OEM specifications, making them a reliable choice for enthusiasts undertaking this type of engine modification. Selecting the correct fuel pump not only enhances the performance of the LS engine but also contributes to the longevity of the vehicle.
Best practices for choosing the right AC Delco fuel pump for an LS swap include assessing the specific power output goals of the engine, determining the required fuel pressure, and ensuring compatibility with the vehicle’s existing fuel lines and electrical systems. It is also advisable to consider professional installation if modifying the wiring harness or fuel delivery system, to avoid potential issues that could compromise performance.
What Are the Key Features to Look for in AC Delco Fuel Pumps for LS Swaps?
When selecting the best AC Delco fuel pump for LS swaps, it’s important to consider several key features that ensure optimal performance and compatibility.
- Flow Rate: The flow rate of the fuel pump is crucial for maintaining the engine’s fuel requirements. For LS engines, a flow rate of at least 58-65 gallons per hour (GPH) is recommended to ensure sufficient fuel delivery, especially under high-performance conditions.
- Fuel Pressure: Proper fuel pressure is essential for LS engines to operate effectively. AC Delco fuel pumps typically maintain a fuel pressure range of 55-60 PSI, which is ideal for LS applications, preventing lean conditions that could damage the engine.
- Durability and Reliability: AC Delco is known for producing high-quality components that are built to last. Look for pumps that feature robust materials and design, which can withstand the harsh conditions often encountered in performance applications, ensuring long-term reliability.
- Noise Level: The operational noise of the fuel pump can impact the overall driving experience. AC Delco fuel pumps are designed to operate quietly, which is particularly important in street applications where cabin noise is a concern.
- Easy Installation: Compatibility and ease of installation are vital for a smooth swap. AC Delco fuel pumps are designed to fit into OEM fuel systems, making them easier to install without extensive modifications, saving time and effort during the swap process.
- OEM Quality Standards: Choosing an AC Delco fuel pump ensures that you are getting a product that meets original equipment manufacturer (OEM) quality standards. This guarantees that the pump will perform reliably and effectively, mirroring the performance of the original parts used in LS applications.
How Do Different AC Delco Fuel Pump Models Compare for LS Swaps?
| Model | Flow Rate | Compatibility | Price | Part Number | Installation Difficulty | Warranty | Recommended Usage |
|---|---|---|---|---|---|---|---|
| AC Delco EP381 | 40-50 GPH – Suitable for most LS applications | LS1, LS2 – Commonly used in early 2000s GM cars | $100 – Mid-range for budget builds | EP381 | Easy | 1 year warranty | Daily driving |
| AC Delco EP486 | 60 GPH – Higher flow for performance needs | LS3, LS6 – Designed for later model applications | $120 – Slightly higher for enhanced performance | EP486 | Moderate | 1 year warranty | Performance builds |
| AC Delco EP376 | 50 GPH – Balanced option for street and track | LS swaps in various vehicles – Versatile compatibility | $90 – Economical choice for many builds | EP376 | Easy | 1 year warranty | Street and track |
What Factors Should You Consider When Selecting an AC Delco Fuel Pump for Your LS Swap?
When selecting an AC Delco fuel pump for your LS swap, several key factors should be considered to ensure optimal performance and compatibility.
- Fuel Flow Rate: The flow rate of the fuel pump is critical, as it determines how much fuel can be delivered to the engine per hour. It’s essential to choose a pump that can meet or exceed the fuel demands of your LS engine, especially if you’re planning on modifications that increase power.
- Pressure Rating: The fuel pressure rating must match the requirements of your LS engine’s fuel system. Different LS setups may require different pressure levels, so selecting a pump that provides the correct psi is vital for maintaining engine performance and reliability.
- Compatibility with Fuel Type: Ensure that the AC Delco fuel pump is compatible with the type of fuel you plan to use, whether it’s regular gasoline or a blend like E85. Some pumps are designed to handle specific fuel types and may have different materials that can affect longevity and performance.
- Durability and Build Quality: Consider the construction materials of the fuel pump, as this can impact its durability and lifespan. High-quality pumps typically feature corrosion-resistant materials and robust designs that withstand the rigors of high-performance applications.
- Installation Requirements: Check the installation requirements and whether modifications are necessary for your LS swap. Some pumps may require specific fittings or modifications to the fuel lines, so understanding the installation process can save time and effort.
- Brand Reputation and Reviews: Research the reputation of AC Delco and read reviews from other users who have completed LS swaps. Feedback from the community can provide insights into the pump’s performance, reliability, and any potential issues encountered during installation.
- Warranty and Support: Look for a fuel pump that comes with a warranty, as this can offer peace of mind regarding its performance. Additionally, check if the manufacturer provides adequate customer support in case you encounter any issues.
How Do You Properly Install an AC Delco Fuel Pump for an LS Swap?
To properly install an AC Delco fuel pump for an LS swap, follow these essential steps:
- Preparation: Gather all necessary tools and components before beginning the installation process.
- Remove the Old Fuel Pump: Safely disconnect and remove the existing fuel pump from the vehicle.
- Install the AC Delco Fuel Pump: Position the new AC Delco fuel pump and secure it correctly.
- Reconnect Fuel Lines: Ensure that all fuel lines are properly attached and sealed to prevent leaks.
- Electrical Connections: Connect the electrical wiring to the fuel pump, ensuring a secure and proper fit.
- Testing: Test the system for leaks and functionality before finalizing the installation.
Preparation: Before starting the installation, it’s crucial to gather all the required tools, including wrenches, a socket set, and any specific parts needed for your LS swap. Having everything on hand will streamline the process and minimize the risk of interruptions.
Remove the Old Fuel Pump: To replace the fuel pump, start by safely disconnecting the battery to avoid any electrical hazards. Then, remove the existing fuel pump, taking care to disconnect any fuel lines and electrical connectors, and ensure that you safely dispose of any old fuel components.
Install the AC Delco Fuel Pump: Place the new AC Delco fuel pump into the designated area, ensuring that it fits snugly and aligns with existing mounting points. Secure it according to the manufacturer’s specifications to prevent any movement or vibrations during operation.
Reconnect Fuel Lines: Carefully reattach the fuel lines to the new pump, ensuring that each connection is tight and properly seated. This step is vital as loose connections can lead to fuel leaks, which pose safety hazards.
Electrical Connections: Connect the electrical wiring to the new fuel pump, making sure that each terminal is clean and free of corrosion. Proper electrical connections are essential for the fuel pump to operate effectively, so double-check all connections for security.
Testing: Once everything is connected, turn the ignition key to the “on” position without starting the engine to prime the fuel system. Inspect for any leaks around the fuel pump and lines, and listen for the pump to engage, indicating that it’s functioning correctly.
What Do LS Swap Enthusiasts Say About Their Experiences with AC Delco Fuel Pumps?
LS swap enthusiasts often share their experiences regarding the performance and reliability of AC Delco fuel pumps in their builds.
- Performance: Many users report that AC Delco fuel pumps provide consistent fuel delivery, which is crucial for the high-performance demands of LS engines.
- Durability: Enthusiasts frequently mention the robust construction of AC Delco pumps, highlighting their ability to withstand the rigors of daily driving and racing without failure.
- Compatibility: A common sentiment among LS swap enthusiasts is the ease of integration that AC Delco fuel pumps offer, making it a popular choice for various LS swap setups.
- Cost-Effectiveness: Users appreciate that AC Delco fuel pumps offer a good balance of price and performance, providing reliable service without breaking the bank.
- Customer Support: Many enthusiasts value the availability of support and resources from AC Delco, which can be beneficial for troubleshooting and installation guidance.
Performance is often a critical factor, with many users reporting that AC Delco fuel pumps maintain steady fuel pressure, ensuring that their LS engines operate efficiently under various conditions. This reliability is particularly noted during heavy acceleration and high RPM scenarios, where fuel delivery is paramount.
Durability is another key aspect discussed, as enthusiasts find that AC Delco pumps are built to last, often enduring the harsh environments of both street and track applications. Their resistance to wear and tear is frequently highlighted, especially compared to cheaper alternatives that may fail prematurely.
Compatibility is a recurring theme, with many users praising how well AC Delco pumps integrate with both OEM and aftermarket components in LS swap projects. This ease of use reduces the complexity and potential headaches associated with sourcing compatible parts.
Cost-effectiveness is a significant factor in many discussions, as enthusiasts often seek reliable components that fit within their budget constraints. AC Delco pumps are frequently seen as a wise investment that provides long-term value without compromising on quality.
Customer support also plays a role in the positive experiences shared by LS swap enthusiasts, as many appreciate the resources available for installation and maintenance. This support can be essential for those new to swaps or those encountering specific issues during their build process.
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