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Choosing the Right Fueling System for Your Hot Rod Build: Returnless or Return Style Kits.

Choosing the Right Fueling System for Your Hot Rod Build: Returnless or Return Style Kits.

Hey there, fellow hot-rodders! Today, we're diving into the exciting world of fueling and discussing the two kits we offer on our website at Fat Fender Garage: the return style kit and the returnless style kit. Whether you're a seasoned car enthusiast or just getting started with your hot rod build, understanding the differences between these two fueling systems can make a significant impact on your project's performance and reliability.

Return Style Kit - A Traditional Approach


Return Style Fuel Kits

The return style kit is a tried and tested method that has been widely used in fueling systems for years. It comprises a dash six AN hose with a generous 25 feet of length. With this kit, you'll route the fuel pump to a regulator and set the pressure to around 55-58 psi, typical for most fuel injection swaps. Any excess fuel over 58 psi is returned to the tank, which is a common scenario with aftermarket pumps delivering more than 100 psi.

The return style kit is a popular choice, particularly among those running turbocharged or supercharged setups. It allows you to dam up the fuel after the fuel rail, ensuring a constant supply of fuel during boost. However, it's essential to note that this system can be more sensitive to issues such as clogged fuel filters or regulator adjustments.

Returnless Style Kit - Embrace Modern Efficiency

Returnless Style Fuel Kits

At Fat Fender Garage, we've embraced a more modern approach with the returnless style kit, similar to what you'll find in modern cars. This system features a single line running from the fuel pump directly to the fuel rail, eliminating the need for a return line. Fuel pressure is controlled by a pulse width modulated (PWM) monitoring system, and a sensor in the fuel rail measures and adjusts the pressure as needed.

With the returnless system, you'll use modern fuel pumps like the ones found in the Mustang GT or Camaro ZL1, capable of handling higher horsepower applications. The PWM system keeps the pump running at a specific pressure, such as 58 psi, even when facing challenges like clogged filters. It's a more wiring-intensive setup, but the fuel lines are much cleaner and more straightforward.

The Benefits of Returnless

One of the primary advantages of the returnless system is that you won't need an extra fuel sending unit since it's built into the fuel pump's wiring harness. This streamlines your fuel delivery system and reduces the risk of issues related to calibration and maintenance.

Returnless is suitable for supercharged or turbocharged systems, and it's surprisingly easy to calibrate and maintain. Moreover, the system is more robust, and fuel pumps, especially those from reputable brands, tend to last longer, making it a reliable choice for modern hot rod builds.

Conclusion - The Right Fueling System for Your Hot Rod

In the end, both the return style and returnless style kits are functional fueling solutions. However, our team at Fat Fender Garage is convinced that embracing modern technology and opting for the returnless style kit can be a game-changer for your hot rod build.

Whether you're working on a Coyote or LS swap, the returnless system offers cleaner fuel lines, robust fuel pump options, and a more efficient way to handle fuel pressure during different driving conditions.

So, fellow hot-rodders, choose the fueling system that suits your vision and performance needs, and enjoy a thrilling and reliable ride in your one-of-a-kind hot rod creation! Happy hot rodding!


Looking to add a returnless or a return style kit to your build today? 

Check out our products and get started on your build!

Return Style Fuel Kits - Click Here

Returnless Style Fuel Kits - Click Here

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