Holley HOL 12-804 Fuel Pressure Regulator

Holley fuel pressure regulators are designed to precisely control the fuel pressure from the fuel pump to the carburetor. Each Holley fuel pressure regulator is fully adjustable, making regulating the fuel pressure to your engine's needs a simple task. All Holley regulators are pre-set at the factory at 2.8 PSI, eliminating any guesswork when first installing the regulator.

The Holley 12-804 fuel pressure regulator features several key specifications. It has 3/8" NPT in/out ports, allowing for easy installation and integration with the fuel system. The regulator offers adjustable fuel regulation from 1 to 4 PSI, providing flexibility to fine-tune the pressure as required by your engine's needs. Additionally, it includes a 0.220" (7/32") restriction, which helps maintain the desired fuel pressure.

Featuring 3/8" NPT ports (1 in, 2 out), the Holley 12-804 regulator provides a secure and reliable connection to the fuel lines. A mounting bracket is also included, simplifying the installation process and ensuring a secure fit within the engine bay.

Importantly, too much fuel pressure for a given needle and seat assembly can overload the needle and seat, potentially leading to flooding or drivability problems. The precise control offered by Holley fuel pressure regulators helps to prevent such issues, ensuring optimal engine performance and reliability.

The pre-set 2.8 PSI configuration of Holley regulators eliminates the need for guesswork during the initial installation. This feature saves time and effort, allowing users to focus on other aspects of the engine build or modification.

In summary, Holley fuel pressure regulators are designed to provide precise control over fuel pressure, delivering several key benefits. The adjustable nature of the regulators, the inclusion of necessary fittings and mounting hardware, and the pre-set factory configuration all contribute to making the installation and tuning process straightforward. By ensuring the proper fuel pressure is maintained, Holley regulators help to optimize engine performance and prevent potential issues related to over-pressurization.

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