Dreaming of that powerful LS engine rumble in your classic ride? You’re not alone! Swapping an LS engine into a different car is a popular way to get more horsepower and a modern feel. But, like any big project, there are tricky parts. One of the biggest headaches for LS swappers is picking the right fuel pump. It’s not as simple as just grabbing one off the shelf!
Choosing the wrong in-tank fuel pump can lead to serious problems. Your engine might not get enough fuel, causing it to run poorly or even break down. Or, you might get a pump that’s too weak for your LS’s needs, leaving you disappointed with its performance. It can feel overwhelming with so many choices and technical jargon out there. You want your LS swap to be awesome, not frustrating!
But don’t worry, we’re here to help! This post breaks down everything you need to know about in-tank fuel pumps for LS swaps. We’ll explain what to look for, what the important numbers mean, and how to choose a pump that will keep your LS engine happy and healthy. By the end, you’ll feel confident in making the best choice for your project, saving you time, money, and headaches. Let’s dive in and get your LS swap fueled up right!
Our Top 5 In Tank Fuel Pump For Ls Swap Recommendations at a Glance
Top 5 In Tank Fuel Pump For Ls Swap Detailed Reviews
1. OSIAS In-Tank Fuel Pump for GM All Models TBI to LSx Swap Fuel Pump + Filter + 58PSI pressure Regulator+ tank seal+strainer (LM7 LR4 LQ4 LQ9 L33) EP38
Rating: 8.6/10
Planning an LS engine swap for your GM TBI truck, van, or SUV? The OSIAS In-Tank Fuel Pump is designed to make that transition smoother. This pump works with all LS series motors and is a direct replacement for the AC Delco EP381. It provides the 58 PSI of fuel pressure that LS engines need. Plus, it won’t overload your factory wiring or overpower existing pressure regulators. This kit includes everything you need: the fuel pump, filter, a 58 PSI pressure regulator, tank seal, and strainer.
What We Like:
- It’s a direct drop-in for 1982-1995 GM TBI fuel pump hangers, simplifying installation.
- Provides the essential 58 PSI fuel pressure required for all LS Engines.
- Compatible with a wide range of LS series motors, including popular ones like LM7, LQ4, and LS1.
- Doesn’t overload factory wiring or overpower OE pressure regulators.
- Comes as a complete kit with filter, regulator, seal, and strainer.
What Could Be Improved:
- The flow rate varies depending on pressure, so it’s important to understand its performance at different PSI levels.
- While a direct replacement for EP381, users might want to confirm exact compatibility with their specific TBI hanger if it’s not a standard GM application.
This OSIAS fuel pump kit simplifies your LS swap. It delivers the right pressure and flow for your engine conversion.
2. High Flow 450LPH Fuel Pump Module with AN Fittings Sending Unit Compatible with Chevy GMC C/K 1973-1991 fit for Series Trucks LS/LT Engine Swap Ready In-Tank Hanger Assembly
Rating: 9.2/10
Upgrade your classic Chevy or GMC C/K truck’s fuel system for your LS or LT engine swap with this High Flow 450LPH Fuel Pump Module. This ready-to-install hanger assembly makes getting the right fuel flow for your project much easier. It’s designed to fit directly into your truck’s fuel tank, simplifying the setup process.
What We Like:
- True Plug-and-Play Installation: Comes with pre-made wiring harnesses. You don’t need to cut or splice any wires. This saves you time and effort.
- High-Flow Fuel Delivery: Built to support a 255LPH fuel pump. It provides enough fuel for most LS/LT engine swaps.
- Robust Electrical Connections: Features upgraded 20A bulkhead connectors. These ensure a strong and safe electrical connection for your fuel pump.
- Enhanced Safety: Eliminates the risk of fuel leaks from pressure fittings. This makes your fuel system safer and more reliable.
- Direct Fit for Classic Trucks: Specifically designed for Chevy GMC C/K 1973-1991 and fit for Series Trucks.
What Could Be Improved:
- Flow Rate: While it supports 255LPH, the product title mentions 450LPH, which might be confusing if the included pump is 255LPH.
This fuel pump module offers a convenient and safe way to power your upgraded engine. It’s a solid choice for DIY enthusiasts tackling an LS/LT swap in their classic truck.
3. Lanotech fuel pump For 73-91 C
Rating: 8.7/10
Upgrading your classic Chevy Square Body with a modern LS or LT engine just got a whole lot easier! The Lanotech 450LPH Fuel Pump Kit is designed specifically for these swaps, offering a high-performance solution to feed your hungry new engine. This kit ensures your fuel system can keep up with the demands of EFI LS or LT power plants like the L83, L86, or LT1, all while keeping your fuel pressure steady at 58psi. It’s built tough for gasoline and even E85 fuel, making it a versatile choice for your project.
What We Like:
- It makes LS/LT swaps in your Square Body much simpler.
- The kit includes a 14-gauge pigtail for a 255LPH pump.
- You get a plug-and-play adapter harness that works with AC Delco EP381 pumps.
- It comes with a submersible high-pressure rubber hose.
- This hose works with both regular gasoline and E85 fuel.
- You can safely swap your engine without using messy compression fittings.
- It’s rated for EFI LS or LT engines running at 58psi.
What Could Be Improved:
- The product description could be a little more detailed about the specific AN fitting sizes included.
- More visual aids or installation guides could be helpful for DIYers.
This Lanotech fuel pump kit is a fantastic upgrade for anyone tackling an LS or LT swap in their 73-91 Chevy Square Body. It delivers the performance and convenience you need to get your project on the road.
4. Lanotech Fuel Pump for 73-91 LS/LT Swap 340LPH an Fitting Hanger +Sending Unit
Rating: 9.4/10
The Lanotech Fuel Pump is a fantastic upgrade for anyone swapping an LS or LT engine into their 1973-1991 Square Body pickup. This kit includes everything you need to get your fuel system working safely and reliably. It’s designed to handle the demands of modern EFI engines, providing a steady 58psi of fuel pressure. Plus, it makes the swap much cleaner by avoiding those tricky splices and solder joints inside your gas tank.
What We Like:
- It’s made for LS or LT EFI swaps in Square Body trucks.
- It gets rid of messy wire splices and solder joints inside the fuel tank.
- You can swap your engine safely without using compression fittings.
- It comes with a 14-gauge pigtail and a plug-and-play harness that works with AC Delco EP381 pumps.
- It delivers a strong 340LPH flow rate.
What Could Be Improved:
- The instructions could be a little clearer for first-time installers.
- More information on specific AN fitting sizes for different fuel line setups would be helpful.
This Lanotech fuel pump kit is a smart choice for a clean and dependable LS/LT swap. It simplifies the installation and ensures your engine gets the fuel it needs.
5. GSL392 Inline Fuel Pump & 58 PSI Fuel Filter Regulator 58 PSI LS Swap Fuel Pump EFI Conversion Fuel Filter Pressure Regulator 255LPH High Pressure External Pump 6AN Fittings 400-939 GSL392-400-939
Rating: 8.5/10
Unleash the power of your LS engine with the GSL392 Inline Fuel Pump & 58 PSI Fuel Filter Regulator kit. This all-in-one package is designed for seamless LS swap EFI conversions, providing your engine with the clean, high-pressure fuel it needs to perform at its best. Whether you’re building a street machine or a track-ready beast, this kit offers reliable fuel delivery and essential filtration.
What We Like:
- Delivers a consistent 58 PSI of fuel pressure, perfect for LS-based engines.
- Includes a 10-micron fuel filter to keep your fuel system clean and protect your engine.
- The GSL392 pump is a high-pressure, external unit capable of 255 LPH, suitable for performance and turbo/supercharged applications.
- Comes with 6AN adapter fittings for easy integration into your LS swap setup.
- Direct-fit design with a mounting bracket and insulator simplifies installation.
- Offers a cost-effective DIY solution, saving you time and money on professional installation.
- Backed by a 12-month warranty and lifetime technical support for peace of mind.
What Could Be Improved:
- While it replaces many part numbers, always double-check compatibility with your specific vehicle before ordering.
This comprehensive kit simplifies your EFI conversion, offering a robust solution for your LS swap. Get ready to experience improved engine performance and reliability with this high-quality fuel system upgrade.
Fueling Your LS Swap: The Ultimate In-Tank Fuel Pump Buying Guide
So, you’re diving into the exciting world of an LS swap! That means you’re replacing your old engine with a powerful General Motors LS engine. To make this happen, you need a fuel system that can keep up. An in-tank fuel pump is a crucial part of that system. It sits inside your fuel tank and pushes gasoline to your engine. Choosing the right one makes a big difference.
Key Features to Look For
When you’re shopping for an in-tank fuel pump for your LS swap, keep these important features in mind.
Flow Rate
This is how much fuel the pump can move per hour. LS engines are thirsty! You need a pump that can deliver enough fuel for your engine’s power. A common recommendation for many LS swaps is a pump that can handle at least 255 liters per hour (LPH). If you have a high-performance LS engine, you might need even more.
Pressure Rating
Fuel pumps also have a pressure rating. LS engines typically run at around 58 PSI (pounds per square inch). Make sure the pump you choose can consistently provide this pressure.
Voltage and Amperage
Most modern vehicles use a 12-volt electrical system. Ensure the pump is designed for 12V. Also, check the amperage draw. A higher amperage draw means the pump uses more electricity. You might need to upgrade your wiring or fuel pump relay if it draws too much.
Fuel Compatibility
Confirm the pump works with the type of fuel you plan to use. Most pumps handle gasoline and E85 well.
Inlet and Outlet Sizes
Check that the fuel line connections (inlet and outlet) match your fuel system. You want a snug fit to prevent leaks.
Noise Level
Some fuel pumps are louder than others. If you prefer a quiet ride, look for pumps known for their low noise output.
Important Materials
The materials used in a fuel pump affect its durability and performance.
- Stainless Steel and Aluminum: These metals are often used for the pump housing. They are strong and resist corrosion from fuel.
- High-Quality Plastics: Internal components, like impellers, are sometimes made from durable plastics. These need to be resistant to fuel degradation.
- Durable Seals and Gaskets: Rubber or Viton seals are important to prevent fuel leaks.
Factors That Improve or Reduce Quality
Several things can make a fuel pump better or worse.
Brand Reputation
Well-known brands often use better materials and have stricter quality control. This means their pumps are usually more reliable.
Warranty
A good warranty shows the manufacturer stands behind their product. A longer warranty period often means a higher-quality pump.
Pump Design
Some pumps have advanced designs that improve efficiency and reduce heat. This can make them last longer.
Manufacturing Precision
How well the pump is made matters. Tight tolerances and precise assembly lead to better performance and fewer issues.
Cheap Materials
Using lower-quality plastics or metals can make a pump fail quickly. This can lead to fuel leaks or a complete loss of fuel delivery.
User Experience and Use Cases
How a fuel pump performs in real-world driving is what matters most.
Daily Drivers
For everyday use, a reliable pump that provides consistent fuel pressure is key. You want a pump that starts the engine easily and runs smoothly without hiccups.
Performance Builds
If you’re building a high-horsepower LS, you need a pump that can handle the extra demand. This ensures your engine gets all the fuel it needs to perform at its best.
Restomods
When you’re putting a modern LS engine into a classic car, an in-tank pump is often the cleanest and most efficient way to deliver fuel.
Ease of Installation
Some pumps are designed to fit directly into your existing fuel tank setup. Others might require modifications. Check reviews to see how easy it is to install.
Frequently Asked Questions (FAQ)
Here are answers to common questions about in-tank fuel pumps for LS swaps.
Q: What is the main purpose of an in-tank fuel pump for an LS swap?
A: The main purpose is to reliably deliver the correct amount of fuel at the right pressure from the fuel tank to the LS engine.
Q: How do I know what flow rate I need?
A: It depends on your engine’s horsepower. For most stock to mildly modified LS engines, 255 LPH is a good starting point. For high-horsepower builds, you’ll need a higher flow rate.
Q: Can I use a fuel pump from another car?
A: Sometimes, but it’s often better to get a pump specifically designed for LS swaps. This ensures compatibility and proper performance.
Q: Do I need a special fuel tank for an in-tank pump?
A: Not always. Many aftermarket in-tank pumps are designed to fit into common stock or universal fuel tanks with a special sending unit assembly.
Q: How much does an in-tank fuel pump for an LS swap usually cost?
A: Prices can range from $100 to $300 or more, depending on the brand, flow rate, and features.
Q: Will a louder fuel pump affect my car’s performance?
A: No, noise level doesn’t directly affect performance. It’s more about comfort.
Q: What happens if my fuel pump fails?
A: Your engine will likely sputter and die. It will not start until the fuel pump is replaced.
Q: How long do in-tank fuel pumps typically last?
A: With good quality and proper installation, they can last for many years and tens of thousands of miles.
Q: Do I need any other parts besides the pump?
A: You might need a new fuel filter, fuel lines, a fuel pump relay, and wiring if you don’t have them already.
Q: Where can I find reviews for specific fuel pumps?
A: Look on automotive forums, dedicated LS swap websites, and online retailer product pages. Real user experiences are very helpful.
In conclusion, every product has unique features and benefits. We hope this review helps you decide if it meets your needs. An informed choice ensures the best experience.
If you have any questions or feedback, please share them in the comments. Your input helps everyone. Thank you for reading.
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