The fuel delivery system setup can make a big difference in how you run on race day—especially if you’re modifying your street car for the track. Our guide will explore the key components that make up a racing fuel delivery system, including heavy-duty fuel tanks, high-flow fuel pumps, precise fuel pressure regulators, and durable fuel lines. We'll also explore the options for fuel delivery, including carburetors, which remain a viable choice for certain race cars, and modern fuel injection systems that offer superior precision and control. By understanding each component and its role in the system, you can make informed decisions when building or upgrading your race car's fuel delivery system.

6 Main Parts of a Fuel Delivery System

Though a race car fuel system includes many components from adapters to valves, these are the six important parts that make up the main configuration.

1 | Fuel Tank/Fuel Cell

The fuel tank is the lifeblood of your race car, storing the combustible fuel that propels you to victory. Unlike a standard car's fuel tank, a racing fuel tank, called a fuel cell, prioritizes both safety and performance. Constructed from high-strength aluminum with a reinforced bladder, or heavy-duty plastic, fuel cells are designed to withstand extreme impacts and prevent fuel leaks in the event of a crash. Both aluminum and plastic are excellent options for a race car.

Aluminum fuel cells excel at dissipating heat, a crucial factor during intense racing conditions; this efficient heat transfer helps prevent vapor lock, a condition where fuel vaporization in the fuel line can lead to power loss. Plastic fuel cells are light, flexible, seamless, and less likely to develop leaks. Whichever material you prefer, choose a fuel tank/cell capacity that aligns with your vehicle size, racing class regulations, and desired pit stop frequency.

2 | Fuel Filter

Fuel filters act as the unsung heroes of your racing fuel system, safeguarding your engine against harmful contaminants. To keep your racing fuel system clean, regularly check your fuel filter for signs of clogging or debris buildup. For optimal efficiency, replace paper fuel filters at the beginning of each racing season, or if the race car sits idle for more than a month or two.

For reusable stainless steel filters, implement a mid-season cleaning routine in addition to pre-season cleaning. Replace stainless steel filters after two racing seasons for peak filtration efficiency.

3 | Fuel Pump

The fuel pump is responsible for delivering a steady and pressurized flow of fuel to your engine. Racing fuel pumps are built for endurance, made to align with your engine's specific needs, like Brake Specific Fuel Consumption (BSFC), fuel volume requirements, and voltage compatibility. Racing fuel pumps come in a variety of operation levels; choose a model that can deliver the necessary fuel flow to meet your horsepower goals without sacrificing fuel efficiency. Explore different fuel pump technologies, including mechanical, electric, and direct injection pumps, to find the best option for your race car's configuration.

4 | Fuel Pressure Regulator

The fuel pressure regulator plays a vital role in your racing fuel system, ensuring consistent fuel pressure within the engine. This fuel system part is designed for precision control and peak operation under demanding racing conditions, regulating the flow of fuel to your engine to maximize power output and overall effectiveness. Many racing fuel pressure regulators offer adjustable pressure settings, allowing you to fine-tune fuel delivery for your specific engine setup. Choose a fuel pressure regulator that seamlessly integrates with your fuel system, whether it utilizes a carburetor or electronic fuel injection (EFI).

5 | Fuel Lines

Fuel lines are like the arteries of your racing system, transporting fuel from the tank to the engine under immense pressure. Most racing fuel lines are constructed from durable materials like braided stainless steel and aluminum that offer:

• Unmatched Durability. These robust lines are built to withstand the extreme heat, pressure, and vibrations encountered during competitive racing.
• Leak-Free Performance. Their superior construction minimizes the risk of leaks or ruptures, keeping your race car safe and your engine performing at its peak.

Remember: Regularly inspect your fuel lines for signs of wear and tear. Replace them when necessary for peak function and safety.

6 | Fuel Injection System

Fuel injection systems have changed the fuel delivery game in modern race cars, offering significant advantages over traditional carburetors. Here's a quick breakdown of the four main types of fuel injection systems:

• Single-Point/Throttle-Body Injection (TBI): A cost-effective and easy-to-maintain option, TBI systems provide a basic level of fuel control.
• Port or Multiport Fuel Injection (MPFI): MPFI systems deliver precise fuel metering for the best air-fuel ratio, maximizing power output and reducing fuel waste.
• Sequential Port Fuel Injection (SPFI): An advanced form of MPFI, SPFI injects fuel sequentially for each cylinder, further enhancing efficiency and emissions control.
• Direct Injection (DI): While more commonly found in diesels, DI is becoming increasingly popular in high-performance gasoline engines. It injects fuel directly into the combustion chamber for exceptional power and efficiency.

The ideal fuel injection system for your race car depends on your specific needs and budget. Consider factors like engine type, horsepower goals, and desired level of adjustability.

Carburetors: The Traditional Choice

While fuel injection systems have become the norm in modern racing, carburetors remain a viable option for certain race car classes and older vehicles. Here's a quick overview of carburetors:

• Simpler Design: Compared to fuel injection systems, carburetors offer a simpler design that can be easier to understand and maintain for some mechanics.
• Cost-Effective: Carburetors are generally less expensive to purchase and maintain than fuel injection systems.
• Limited Adjustability: While some adjustments can be made, carburetors offer less precise fuel metering compared to modern fuel injection systems.
• Potential Disadvantages: Carburetors can struggle with maintaining optimal air-fuel ratios under varying racing conditions, which may lead to some loss of power and efficiency.

Choosing Between Carburetors and Fuel Injection

The decision between a carburetor and a fuel injection system depends on several factors, including:

• Racing Class Regulations: Some racing classes mandate the use of carburetors.
• Budget: Carburetors are generally the more budget-friendly option.
• Engine Type and Performance Goals: For peak performance in modern racing, fuel injection systems typically offer advantages.

Behrent's Performance Warehouse offers a wide selection of racing carburetors, parts, and rebuild kits from some of the top names in racing—including Edelbrock, COMP Cams, and Holley Performance Products—that are easy to install, adjust, and maintain.

Fuel Storage Containers

Don't forget to add a few sturdy motorsport storage containers to your arsenal of fuel system delivery products. Made in high-density polyethylene, sturdy storage containers and jugs can withstand the roughest treatment in the pits or garage. Pick up a few and keep them in your trailer for easy storage and transport to the track. Five-gallon motorsport fuel containers and jugs from VP, Bicknell, and other top racing brands are ergonomically designed for better venting, handling, and storage.

There are plenty of essential parts and components in a fuel delivery system for a race car. By maintaining, replacing, and repairing these parts regularly, you’re fueling your track day success. Explore top racing brands at Behrent’s and find the best pieces to improve your production on race day.