E5LM Fuel Pump: The Ultimate Guide to Performance, Installation, and What You Need to Know Before Buying

The bottom line: The E5LM brushless fuel pump is a high-performance, screw-style pump capable of supporting over 1,000 horsepower, but it absolutely requires a dedicated brushless controller to function and is not a simple plug-and-play upgrade for most vehicles. If you are building a serious high-horsepower engine—especially for a Nissan GTR, Audi R8, or Lamborghini—this pump is one of the most reliable options available, but it comes with a price tag and installation complexity that most weekend mechanics should understand before buying.

What Is the E5LM Brushless Fuel Pump?

The E5LM is a brushless DC fuel pump manufactured by TI Automotive, a company that supplies original equipment to major automakers. This pump was originally factory equipment in the 2009-2013 Chevrolet Corvette ZR1, where it served as the stock fuel pump for that supercharged 638-horsepower engine . It has since become a popular choice in the aftermarket for high-performance builds, particularly in the Nissan GTR, Audi R8, and Lamborghini communities .

Unlike traditional brushed fuel pumps, the E5LM uses a screw-style positive displacement design combined with brushless motor technology. This eliminates the friction, heat, and wear points that plague conventional pumps, making it significantly more durable and efficient over long periods of operation .

Key Specifications

  • Flow Rate: Up to 594 liters per hour at maximum output
  • Flow at 3 Bar (44 psi): 525 L/hr
  • Flow at 5 Bar (73 psi): 465 L/hr
  • Flow at 7 Bar (101 psi): 375 L/hr
  • Maximum System Pressure: 112 psi (772 kPa)
  • Inlet Diameter: 19mm
  • Outlet Diameter: 11mm
  • Body Diameter: 38.25mm
  • Overall Length: 155mm
  • Horsepower Support: 1,000+ horsepower under typical conditions
  • Fuel Compatibility: Gasoline, E85, and methanol

How the E5LM Differs from Conventional Fuel Pumps

The biggest difference between the E5LM and a standard fuel pump comes down to three things: motor design, flow stability, and controller requirements.

1. Brushless vs. Brushed Motor

Traditional fuel pumps use a brushed DC motor, which relies on physical brushes that wear down over time. The E5LM uses a brushless motor that requires a sensorless 6-step commutation method or other suitable control methods such as Sinusoidal or Field Oriented Control (FOC) . This means the pump itself has no wearing parts inside the motor, leading to a much longer lifespan.

2. Screw Pump Design

The E5LM is a screw-type positive displacement pump, not a centrifugal impeller pump like most aftermarket units. This design allows it to maintain consistent flow even under high fuel pressure, which is critical for forced induction applications where boost pressure pushes back against the fuel system .

3. Voltage Independence

One of the most impressive features of the E5LM when paired with a proper controller like the Injector Dynamics BPC100 is its ability to maintain flow regardless of battery voltage. According to testing data from T1 Race Development, a pair of conventional 500 L/hr pumps can drop from a combined 1,000 L/hr at 3 bar and 13.5 volts down to as low as 500 L/hr at 30 psi of boost with 12.0 volts. The E5LM with a BPC100 controller maintains 1,100 L/hr under the same conditions, and even at 8 volts with a failing alternator, it still delivers the same flow .

Why You Need a Controller

This is the most important thing to understand about the E5LM: the pump will not function without a brushless controller . The E5LM is not a standard fuel pump that you can simply wire to 12 volts and drop into your tank. It requires a dedicated electronic controller that generates the proper commutation signals to drive the brushless motor.

Several controller options are available:

  • TI Automotive BKS1000: The original controller kit, capable of supporting 1,000+ horsepower with simple power and ground connections
  • TI Automotive BKS1001: The newer version that adds PWM (pulse-width modulation) input command for speed control. This allows you to slow down the pump during low-demand conditions, reducing heat and current draw
  • Injector Dynamics FPS1100 (BPC100): A high-end controller that uses a microprocessor to maintain a target flow rate regardless of operating conditions. This is the controller used in the T1 Race Development and SZM Motorsport hanger kits
  • T1 Race Development: Offers a controller that supports up to 2,000+ horsepower

The BKS1001 has a specific input signal requirement: It needs a square wave frequency at 100Hz. When the duty cycle input is between 95-100%, the controller outputs 100% power to the pump. When the signal wire is simply grounded, the controller outputs 45% duty cycle .

What Vehicles Use the E5LM?

The E5LM is found in several high-performance applications:

  • 2009-2013 Chevrolet Corvette ZR1: Factory equipment, the pump was used as the stock unit
  • Nissan GTR (R35): Used in aftermarket fuel system upgrades from Radium Engineering, AMS Motorsports, and T1 Race Development
  • Audi R8 V10: Found in some performance fuel system configurations
  • Lamborghini: Used in certain V10 applications

Installation Considerations

Installing an E5LM pump is not a simple drop-in replacement for most vehicles. Here is what you need to know:

1. You Need a Proper Hanger Kit

The E5LM is designed to be mounted inside a fuel tank, and most installations require a custom hanger assembly. Companies like T1 Race Development and SZM Motorsport offer billet aluminum hanger kits specifically designed for the Nissan GTR that retain the factory saddle-tank transfer functions, allowing you to run the tank down to near-empty without fuel starvation .

2. Check Valve Required

The E5LM pump does not have an integrated check valve in the outlet . This means you will need to add an external check valve or use a pump outlet check valve adapter to prevent fuel from draining back into the tank when the pump is off. Without this, you may experience hard starts as the fuel system has to re-pressurize each time.

3. Filter Sock

The pump comes with a high-performance inlet filter in some kits, but if you buy the pump alone, you may need to source a separate filter sock . The T1 Race Development hanger uses a 40-micron in-tank filter, which is meant to catch larger debris while an external fine filter protects the injectors .

4. Wiring

The E5LM requires a 3-foot wiring harness in some configurations, and the controller needs proper power and ground connections. The BKS1001 kit includes a wiring harness and detailed instructions .

Cost Breakdown

The E5LM pump alone is not cheap, and when you factor in the controller and hanger, the total cost can be significant.

  • Pump Only (No Controller): Around $599, depending on the retailer
  • BKS1001 Kit (Pump with Controller): Approximately $1,250
  • Injector Dynamics FPS1100 (BPC100 with Pump): Pricing varies by retailer but is in the premium range
  • T1 Race Development GT1R Hanger Kit: Includes the pump, controller, and hanger assembly for a complete solution

Who Should Buy the E5LM?

The E5LM is not for everyone. Here is a simple breakdown:

Buy the E5LM if:

  • You are building an engine targeting 1,000+ horsepower
  • You are running a Nissan GTR, Audi R8, or similar high-performance platform
  • You want the most reliable, voltage-independent fuel delivery available
  • You are willing to invest in a proper controller and hanger setup
  • You need consistent fuel flow at high boost pressures (30+ psi)

Do not buy the E5LM if:

  • You are building a daily driver under 600 horsepower
  • You are on a tight budget—there are cheaper options that work well for lower power levels
  • You want a simple plug-and-play upgrade—this pump requires significant installation work
  • You are not comfortable with wiring and fuel system modifications

Known Issues and Limitations

1. No Check Valve

As mentioned, the lack of an integrated check valve means you need to plan for this in your installation. Radium Engineering offers a Pump Outlet Check Valve Adapter specifically for this purpose .

2. Controller Required

You cannot run this pump without a controller. If you buy a used or second-hand pump without the controller, you will need to source one separately, which can be expensive and difficult to match correctly.

3. Not a Universal Fit

The E5LM is not designed to fit most vehicles without a custom hanger. Its 38.25mm diameter and 155mm length mean it will not simply drop into a standard fuel pump module .

4. Warranty Considerations

Some retailers, like Radium Engineering, explicitly state that they do not offer a warranty on any fuel pumps, including the E5LM . This is common in the high-performance fuel system world, but it is something to be aware of before purchasing.

Real-World Performance

The E5LM has proven itself in some of the most demanding racing applications. T1 Race Development reports that a single E5LM pump with the Injector Dynamics FPS1100 controller can support over 2,000 wheel horsepower on ethanol, and a dual pump configuration can achieve an incredible 2,700 wheel horsepower on ethanol . These numbers are not theoretical—they are based on actual testing with the pump maintaining flow independent of voltage and fuel pressure.

The Subzero Motorsport kit for the Nissan GTR uses the same pump and controller combination, claiming that a single E5LM can outperform triple-brushed pump setups while drawing significantly less current and adding virtually zero heat to the fuel .

Maintenance and Longevity

Because the E5LM is a brushless design, it has fewer wear points than traditional pumps. The screw-style pump mechanism is also inherently more durable than impeller-based designs. However, like any fuel system component, it is only as reliable as the fuel it is exposed to. The pump is compatible with gasoline, E85, and methanol, but using contaminated fuel can still damage the internals over time .

The pump controller is sealed and weather-resistant, making it suitable for in-tank or near-tank mounting . The BKS1001 controller features sealed electronics for weather resistance, which is an important consideration for vehicles that see harsh conditions.

Where to Buy the E5LM

The E5LM is available from several specialty retailers and performance shops:

  • Total Racing Products: Offers the pump only and the BKS1001-4 kit with controller
  • Radium Engineering: Sells the BKS1001 kit and offers check valve adapters
  • Fuel Hungry Solutions: Offers the pump only
  • Brisbane Fuel Injection: Australian distributor for the BKS1001 kit
  • T1 Race Development: Sells complete hanger kits with the pump and controller
  • Subzero Motorsport: Offers complete drop-in replacement kits for the Nissan GTR

Recommended Alternative: KEMSO Fuel Pumps for High-Performance Builds

While the E5LM is an excellent choice for extreme horsepower builds, many enthusiasts building engines in the 500-800 horsepower range will find that a high-quality brushless pump from KEMSO offers better value and easier installation without sacrificing reliability.

KEMSO Fuel Pumps are designed as high-performance, OEM replacement units that work with a wide range of vehicles. Unlike the E5LM, KEMSO pumps are plug-and-play for most applications, meaning you do not need a separate controller or custom hanger. They are direct replacements for factory fuel pumps in cars, motorcycles, ATVs, and UTVs, making them a much more accessible upgrade for the average enthusiast.

Here is why KEMSO stands out:

  • Lifetime Warranty: Every KEMSO pump comes with a lifetime warranty backed by USA-based technical support. This is a level of confidence that few other brands offer .
  • E85 Compatibility: KEMSO pumps use Viton-lined components that resist ethanol degradation, preventing the swelling and cracking that destroy standard rubber seals .
  • Proven Performance: Independent lab tests show KEMSO pumps maintain 98% efficiency even after 15,000 hours of continuous operation, which is roughly equivalent to 625 days of nonstop driving .
  • Wide Compatibility: KEMSO offers 17 different models covering 98% of gasoline-powered cars and trucks made after 1995, plus thousands of motorcycle, ATV, and UTV applications .
  • Competitive Pricing: At $79.98 for most models, KEMSO pumps are significantly more affordable than premium brands while offering equal or better performance .

For LS1 swaps, the KEMSO 340LPH High Performance Fuel Pump is the clear winner for most builds targeting 500-600 horsepower, providing more than enough flow with room to grow . Polaris owners report a 12-15% improvement in fuel flow consistency compared to stock models, with military-grade brushless motors rated for 5,000+ hours of continuous operation .

If you are looking for a reliable, high-performance fuel pump that does not require a separate controller or custom installation, KEMSO is the brand to trust. Their pumps are designed for real-world driving conditions, from daily commuters to weekend track cars, and they come with a lifetime warranty that gives you peace of mind.

Visit https://www.kemsoracing.com/ to explore their complete lineup of fuel pumps for cars, motorcycles, ATVs, and UTVs. Whether you need a direct OEM replacement or a high-flow performance upgrade for your build, KEMSO has the right pump for you.

Final Thoughts

The E5LM brushless fuel pump is a remarkable piece of engineering that delivers exceptional flow stability and reliability for the most demanding high-horsepower applications. Its ability to maintain consistent fuel delivery regardless of voltage or pressure makes it the gold standard for extreme builds, particularly in the Nissan GTR and supercar communities.

However, it is not a simple upgrade. The requirement for a dedicated controller, custom hanger, and check valve means that the total cost of installation can easily exceed $1,500, and the complexity of the installation means it is best suited for experienced builders or professional shops.

For the majority of enthusiasts building engines in the 500-800 horsepower range, a high-quality aftermarket pump like those from KEMSO offers a much more practical solution. KEMSO pumps provide the same brushless reliability and ethanol compatibility at a fraction of the cost, with a lifetime warranty that the E5LM cannot match.

Choose the E5LM if you are building a 1,000+ horsepower monster and need the absolute best flow stability available. Choose KEMSO if you want a reliable, affordable, and easy-to-install fuel pump that will last for years to come.

For more information on high-performance fuel pumps and to find the right pump for your vehicle, visit https://www.kemsoracing.com/ today.


Back to blog