Katerina Swanson
The Walbro 255 LPH high-pressure fuel pump is a popular choice for the Honda S2000, offering an approximate 65% increase in flow rate compared to the factory pump. This pump can support up to 500 horsepower and is designed for gasoline-powered vehicles. However, some S2000 owners opt for higher-capacity pumps, such as the Walbro 450/480 LPH, to accommodate power outputs ranging from 450 to 750 horsepower. The choice of fuel pump depends on the desired horsepower and the ability of the pump to deliver adequate fuel volume and pressure to support that horsepower.
| Characteristics | Values |
|---|---|
| Factory base fuel pressure | 43.5 PSI |
| Walbro 255 HP pump | 500 hp |
| Walbro 450/480 LPH E85 specific fuel pump | 450-500 whp |
| ID2200cc | 600-750 whp |
| AEM 340 LPH In-Tank Fuel Pump | 340 liter/hour |
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What You'll Learn
The Walbro 255 HP pump can support up to 500 hp
The Walbro 255 LPH high-pressure fuel pump is a popular choice for performance vehicles. It can support up to approximately 500 hp, making it a significant upgrade over the factory fuel pump. This pump is designed for gasoline engines and can be used as a direct drop-in replacement for the factory fuel pump in the fuel tank.
The Walbro 255 fuel pump is known for its robust brush-type motor design and proven reliability. It offers a flow rate of 255 liters of fuel per hour, providing ample fuel volume for applications with larger injectors or rising rate fuel pressure regulators. This pump is commonly used in high-performance applications, such as those with a fuel surge tank, and is valued for its ability to maintain flow at increased pressures.
When considering the pump's horsepower capability, it is important to understand the specific engine setup and critical variables that can impact performance. These variables include operating fuel pressure, fuel temperature, and electrical fluctuations. Running the pump at its absolute maximum theoretical flow capacity is not advisable as it can lead to system failure. Industry standards recommend that the pump be capable of supplying 1.5 to 2 times the engine's actual fuel requirement.
The Walbro 255 fuel pump is a popular choice for performance enthusiasts and professionals due to its ability to reliably support up to 500 horsepower. This rating is derived from industry experience, dyno testing, and an understanding of fuel flow requirements. By replacing the factory fuel pump with the Walbro 255, users can expect increased performance and efficiency in their vehicles.
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The Aeromotive 340 HP pump is recommended for turbocharged 500 bhp S2000s
The Aeromotive 340 HP pump is a high-output, in-tank, electric fuel pump that can deliver over 340 litres per hour (LPH) at 40 psi. This is more than 30% higher flow compared to other aftermarket pumps. The pump is compact and lightweight, and can be bolted into many existing hanger assemblies, making it a universal replacement option for applications requiring more flow while retaining factory lines.
Aeromotive's Phantom Fuel System allows users to install a high-performance fuel pump inside virtually any fuel tank, including the factory tank. This is a convenient option for those considering a switch to EFI or a late-model motor. The installation process involves cutting a hole in the tank, measuring the depth, cutting the pump hanger bracket to length, and installing the baffle, retainer ring, and gasket.
The 340 HP pump is ideal for turbocharged applications, as it can support the increased flow requirements of forced air power adders. While it is recommended for turbocharged 500 brake horsepower (bhp) S2000s, it is important to note that the pump may not be compatible with all vehicles and fuel systems. Aeromotive provides an application guide to help users determine compatibility, and it is crucial to carefully research and test the pump's suitability for specific applications.
The Aeromotive 340 HP pump offers a powerful and efficient solution for turbocharged S2000s, providing the necessary fuel flow to support 500 bhp while maintaining the factory lines and mounting provisions. With its high-output capabilities and compact design, it is a popular choice for those seeking enhanced performance and reliability in their turbocharged S2000s.
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The Walbro 450/480 LPH E85 fuel pump can support 600-750 whp
The Walbro 450/480 LPH E85 fuel pump is a high-pressure, high-flow performance fuel pump designed for engines with more than 750 hp. It is designed and developed for E85 Ethanol and gasoline applications. The pump has a dual-channel turbine design, which makes it extremely efficient under high-pressure and high-temperature conditions. This design incorporates two composite plastic blades that feed two high-pressure pumping channels, resulting in improved hot fuel flow and minimal noise. The Walbro 450 LPH pump can flow anywhere from 15-120 psi, with a bypass valve set higher than previous Walbro fuel pumps.
The Walbro 450 LPH fuel pump is a direct replacement for the factory fuel pump, offering a significant increase in fuel volume. It is designed to meet the requirements of modern turbocharged applications where a single 255 LPH fuel pump is insufficient. With its high flow rate of 450 LPH and operating pressure of 35-87 PSI, the Walbro 450 LPH fuel pump can support engines with up to 750 hp or even higher.
The Walbro 450 LPH E85 fuel pump is a popular choice for high-performance applications and is known for its quiet operation compared to previous Walbro pump designs. It is important to note that this fuel pump requires modifications to system wiring, fuel lines, and the fuel module, and professional installation is recommended. Additionally, there is a high counterfeit rate for this product, so it is crucial to purchase only from authorized dealers.
The Walbro 450/480 LPH E85 fuel pump, with its high-pressure and high-flow capabilities, can support engines in the range of 600-750 whp. This fuel pump is a popular choice for those seeking increased performance and efficiency, especially in turbocharged applications. With its innovative design and high-performance capabilities, the Walbro 450/480 LPH E85 fuel pump is a reliable option for those looking to upgrade their fuel delivery system.
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The ID 1050x fuel pump can support 450-500 whp
The ID 1050x fuel pump is suitable for applications with larger injectors or rising rate fuel pressure regulators. It is important to note that the fuel system may need adjustments or upgrades to accommodate the increased horsepower. For example, the fuel pressure may need to be raised using an adjustable fuel pressure regulator, such as the AEM 1:1 FPR.
Additionally, some users have reported success with twin pump setups, such as using twin Walbro pumps or Aeromotive external pumps, for achieving higher horsepower levels. These external pumps can provide a significant increase in fuel flow but may be louder than other options.
When considering modifications to the fuel system and horsepower, it is important to consult with professionals or experts in the field to ensure that all components are compatible and safely installed.
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A return style fuel system is required for 500 whp+
For Honda S2000, a Walbro 255 LPH high-pressure fuel pump can support up to 500 hp. This is an upgrade from the factory fuel pump, with an increase of approximately 65% in terms of flow.
However, to achieve 500 whp and beyond, a return-style fuel system is required. This is because the stock fuel lines may not be able to handle the increased fuel volume needed at this power level, especially when using E85 fuel.
A return-style fuel system includes a feed line and a return line, allowing for the efficient flow and circulation of fuel. This type of system can support power goals of 700 to 800 whp with the right setup, including the use of twin regulators and triple 465 pumps.
For those seeking to achieve 500+ whp, it is recommended to consult with tuning specialists to determine the specific fuel system components and setups required to safely reach these power goals.
Additionally, when considering a return-style fuel system, it is important to factor in the drawbacks, such as reduced fuel efficiency and the need to maintain at least half a tank of fuel when using E85.
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Frequently asked questions
The factory base fuel pressure is 43.5 PSI. The Walbro 255 LPH high-pressure fuel pump can support up to 500 HP.
The Walbro 255 LPH high-pressure fuel pump is a popular choice that can support up to 500 HP.
Choosing the right fuel pump for your S2000 is as important as choosing the correct injector. Most injectors are designed to operate most efficiently at 3 BAR (43.5 PSI).
Horsepower can be calculated by crankshaft horsepower, factoring in the correct fuel rail pressure.
Aftermarket fuel pumps, such as the Walbro 255 LPH, can provide an increase in fuel volume and pressure, resulting in higher horsepower capabilities.
