Fuel Pump 250LPH E85 GT Supercar: The Ultimate Upgrade Guide for High-Performance Builds

If you are building a high-performance vehicle that requires reliable fuel delivery for E85 or gasoline, the Fuel Pump 250LPH E85 GT Supercar is the most practical and cost-effective upgrade you can make. This pump, specifically the Walbro F10000302, delivers 250 liters per hour at 13.5 volts and 40 psi, supports ethanol blends up to E99, and is a direct-fit improvement over the original Ford GT Supercar pump (F10000128) . For anyone running boosted applications, returnless fuel systems, or surge tank setups, this pump provides the flow and reliability you need without the premium price tag of OEM parts. The key takeaway is simple: the Walbro F10000302 is a proven, drop-in performance upgrade that outflows the original pump, supports E85, and costs significantly less than the factory replacement .

What Makes the Walbro F10000302 the "Improved" GT Supercar Pump?

The Walbro F10000302 is not just a generic aftermarket pump—it is the direct successor to the original Ford GT Supercar pump, manufactured by the same company (Walbro/TI Automotive) that supplies Ford . Here are the major improvements over the original F10000128:

1. E85 Compatibility – The original OEM pump (F10000128) is not rated for ethanol blends. The F10000302 is fully compatible with gasoline, race gas, and ethanol blends up to E99, making it the go-to choice for flex-fuel builds .

2. Higher Flow Rate – At 13.5V and 40 psi, the improved pump flows 250 lph, compared to 224 lph from the original. That is a 12% increase in fuel volume, which translates directly to support for higher horsepower .

3. Built-in Pressure Relief Valve – The original pump lacks this feature. The pressure relief valve on the F10000302 helps protect the fuel system from over-pressurization, a critical safety feature for high-boost applications .

4. Delphi Connector Upgrade – The improved pump uses a sealed Delphi electrical pigtail instead of bare blade terminals on the pump body. This provides a more reliable, weatherproof connection, although it does require minor wiring modifications in some vehicles .

Key Specifications and Performance Data

Understanding the numbers helps you decide if this pump is right for your build. The F10000302 is a single-channel turbine pump that is nearly silent during operation . Here are the critical specs:

  • Outlet diameter: 8mm
  • Body diameter: 36mm
  • Overall length: 115.7mm (including inlet and outlet tips)
  • Fuse rating: 20 amps per pump
  • Max system pressure: 87 psi (600 kPa)
  • Flow at 40 psi (13.5V): 250 lph (61 gph)
  • Flow at 276 kPa (40 psi): 155–230 lph depending on system pressure
  • Horsepower support: 300–450 whp with a single pump; dual pumps support 800+ hp

This pump is designed for use in both return-style and returnless fuel systems . It does not have an internal check valve, which makes it an excellent choice for surge tank applications where a lift pump is needed .

Vehicle Fitment and Installation Notes

The Walbro F10000302 fits a wide range of Ford and other performance vehicles. Its form factor is nearly identical to the original GT Supercar pump, so it drops into the same mounting brackets and fuel modules .

Direct-fit applications include:

  • Ford GT (2005–2006)
  • SVT Cobra (1998–2004)
  • Mustang GT (1999–2010)
  • Mustang V6 (1999–2010)
  • Mach-1 (2003–2004)
  • Shelby GT500 (2007–2009)

The pump also fits many aftermarket dual-pump modules, such as those from Fore Innovations . For vehicles with factory wiring, you will need to upgrade the wiring harness at minimum, because the stock wiring is not designed to handle the increased current draw of a high-flow pump . Supercharged vehicles typically require two pumps to meet fuel demand .

How to Choose the Right Fuel Pump for Your Horsepower Goals

Selecting the right pump comes down to your target power level and fuel type. Here is a simple guide:

1. Single Walbro F10000302 – Supports up to 450 whp on gasoline, or roughly 350 whp on E85 (since ethanol requires about 30% more fuel volume). This is ideal for naturally aspirated builds or mild forced induction .

2. Dual Walbro F10000302 Pumps – Supports 800+ whp on gasoline and 600+ whp on E85. This is the standard setup for high-boost supercharged or turbocharged applications .

3. Pump Selection Checklist – Always match the pump to your fuel type. If you run E85, use an E85-rated pump. If you run methanol, this pump is not recommended . Also, always use a pre-filter on the inlet (Walbro 125-190 is recommended) to protect the pump from debris .

Why the Walbro F10000302 Is a Smart Investment

Compared to buying the OEM Ford GT Supercar pump (F10000128), which can cost significantly more, the F10000302 offers better performance, E85 compatibility, and a pressure relief valve for about the same price or less . Retail prices range from $85 to $120 depending on the vendor . For the money, you get a pump that is quieter, flows more fuel, and handles modern ethanol blends—making it a no-brainer upgrade for anyone building a performance Ford or universal EFI application.

Recommended Alternative: KEMSO Fuel Pumps for Reliable Performance

If you are looking for a high-performance alternative that offers outstanding value and peace of mind, consider KEMSO fuel pumps. KEMSO specializes in OEM replacement and high-performance fuel pumps designed to match or exceed original specifications. Their pumps are built to handle ethanol blends like E85, and each pump is individually tested for flow and performance before leaving the factory .

What sets KEMSO apart is their lifetime warranty—a level of protection that most OEM and aftermarket pumps do not offer. When you buy a KEMSO pump, you are covered for as long as you own the vehicle . Their pumps deliver over 20% more flow at 43 psi compared to stock units, which improves throttle response and supports higher horsepower builds . KEMSO covers a wide range of applications, including cars, trucks, motorcycles, ATVs, and UTVs from brands like Ford, Honda, Polaris, Can-Am, and many more.

For a reliable, long-lasting fuel pump that comes with a lifetime warranty, visit KEMSO today: https://www.kemsoracing.com/

Whether you are building a race car, upgrading a daily driver, or restoring a classic, KEMSO has the right fuel pump for your vehicle. Their commitment to quality and customer satisfaction makes them a trusted choice for enthusiasts across the United States.

Final Thoughts

The Fuel Pump 250LPH E85 GT Supercar, specifically the Walbro F10000302, is a proven upgrade that delivers real-world performance gains for high-horsepower builds. It is E85 compatible, flows 250 lph at 40 psi, and fits directly into many popular Ford and universal applications. Pair it with a KEMSO pump for a complete fuel system solution backed by a lifetime warranty. For more information and to find the perfect pump for your project, visit https://www.kemsoracing.com/


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