Adjusting Edelbrock Fuel Pressure Regulators: A Simple Guide

Edelbrock offers a range of fuel pressure regulators, including both adjustable and non-adjustable options, to cater to different carburetor applications. The process of adjusting fuel pressure on an Edelbrock sump involves specific steps, as outlined in the Edelbrock Community Forum. It is important to follow the correct procedure to ensure the desired fuel pressure is achieved and maintained. This includes considerations such as adjusting the regulator with the engine running or idle, and whether to remove the vacuum line during the process.

Edelbrock 17401 rail mount regulator

The Edelbrock 17401 rail mount regulator is designed to be mounted directly to the fuel rail, eliminating the need for an alternate mounting location in the engine bay. This is a significant advantage as it saves you the hassle of finding a suitable place to mount the regulator.

The regulator has a compact push-in style design with a swivel-style mounting bracket, allowing it to be clocked in various directions to fit your setup. It is compatible with Pro-Flo 3 and Pro-Flo 4 EFI systems and can be used with any -6 AN fuel rail. The regulator is also available in a black finish.

The Edelbrock 17401 is a non-adjustable regulator that comes preset to deliver 58 PSI of fuel pressure. It is important to note that this regulator is designed for fuel rails with female -6 ORB ports.

The installation process for the Edelbrock 17401 rail mount regulator involves removing the black plug and installing it on the exit side of the fuel rail. This is a straightforward process, but it is always recommended to refer to the instruction manual or seek professional assistance if needed.

Edelbrock Pro-Flo 4 Fuel Pressure Regulators

The Edelbrock Pro-Flo 4 Fuel Pressure Regulators are available in two models: the Fuel Injection Pressure Regulator #17400 and the Fuel Injection Pressure Regulator #17401. Both regulators feature a unique design that allows them to be mounted directly to any fuel rail with female -6 ORB ports, eliminating the need to find a mounting place in the engine bay.

The Fuel Injection Pressure Regulator #17400 is pre-set to make 43 PSI of fuel pressure and is ideal for any Pro-Flo 4 EFI system. It features a compact push-in style design and a swivel-style mounting bracket that allows it to be clocked in various directions to fit your setup.

On the other hand, the Fuel Injection Pressure Regulator #17401 is pre-set to make 58 PSI of fuel pressure. It also features a compact push-in style design with a swivel-style mounting bracket, allowing it to be adjusted to fit your setup. This regulator is a great addition to any Pro-Flo 4 EFI system.

It is important to note that the Edelbrock Pro-Flo 4 Fuel Pressure Regulators are non-adjustable. When deciding between the two models, consider your engine's specific requirements and whether a 43 or 58 PSI regulator is more suitable.

Additionally, when installing the regulator, it is recommended to mount it close to the fuel rails, similar to factory installations. This helps to minimise "hammering" fuel pulses in the fuel line and acts as a pulsating damper.

Edelbrock Fuel Pressure Regulator #8190

The Edelbrock Fuel Pressure Regulator #8190 is designed for carburetor applications that require consistent pressure from 4-1/2 to 9 psi. It is manufactured from billet aluminum and features a Nylon-reinforced Nitrile diaphragm for excellent heat and leak resistance. It is compatible with all grades of gasoline/methanol.

The regulator has two 3/8" NPT outlets, one 3/8" NPT inlet, and a 1/8" NPT gauge port. It is adjustable from 5 to 12 psi. The inlet and outlet types are threaded, and the attachment method is via a bracket. This regulator is designed to be used with Holley Standard-Flange Duel-Feed and 4500-Series Carbs.

The Edelbrock Fuel Pressure Regulator #8190 is a high-quality product from Edelbrock, a company recognised as one of the nation's premier designers, manufacturers, and distributors of performance replacement parts for the automotive and motorcycle aftermarkets. Edelbrock uses state-of-the-art equipment in their world-class manufacturing facilities to produce core products in the United States of America.

To adjust the Edelbrock Fuel Pressure Regulator #8190, you will need to locate the adjustment screw or knob on the regulator. This is usually a small screw or knob that can be turned to increase or decrease the fuel pressure. Before making any adjustments, it is important to consult the regulator's instruction manual and take the necessary safety precautions. It is also recommended to have a fuel pressure gauge installed to accurately measure the fuel pressure during the adjustment process.

Once you have located the adjustment screw or knob, use a screwdriver or wrench to turn it in the appropriate direction to achieve your desired fuel pressure setting within the regulator's adjustable range of 5 to 12 psi. Make sure to adjust the regulator in small increments and re-check the fuel pressure after each adjustment to avoid over-tightening or over-loosening the screw.

Edelbrock Fuel Pressure Regulator #1789

The Edelbrock Fuel Pressure Regulator #1789 is designed to provide consistent pressure for Edelbrock 94 and other low-pressure carburetor applications. It features two 3/8" NPT outlets, one 3/8" NPT inlet, and is adjustable from 1 to 4 psi.

To adjust the fuel pressure on the Edelbrock Fuel Pressure Regulator #1789, follow these steps:

• Ensure that you have the correct tools, which are a 9/16” wrench and a 7/16” wrench.
• Loosen the jam nut on the regulator with the 9/16” wrench.
• To increase the fuel pressure, tighten the adjuster screw with the 7/16” wrench. To decrease the fuel pressure, loosen the adjuster screw.
• Adjust the screw until you reach the desired fuel pressure within the 1 to 4 psi range.
• Once you have achieved the correct pressure, tighten the jam nut while holding the adjuster screw in place to secure the setting.

It is recommended to refer to the instruction manual for your specific Edelbrock product, as there may be additional steps or considerations for your particular application.

Additionally, when adjusting the fuel pressure, it is common to disconnect the vacuum line to the regulator and adjust the setting with the engine idling. This allows you to monitor the fuel pressure reading and make adjustments as needed.

Edelbrock sump fuel pressure

The Edelbrock sump fuel pressure is factory set to 58 psi, but can be adjusted. The Edelbrock Universal Fuel Sump Kit #36031 is designed to provide the necessary high fuel pressure required for EFI applications in vehicles equipped with an existing low-pressure carbureted fuel system. This kit includes everything needed for a complete installation and is adjustable from 35 to 90 psi.

To adjust the fuel pressure, first, unplug the vacuum line. Then, loosen the jam nut on the regulator with a 9/16” wrench. Next, adjust the pressure by tightening or loosening the adjuster screw with a 7/16” wrench. Tighten the screw to raise the pressure and loosen it to lower the pressure. Finally, when the desired pressure is met, tighten the jam nut while holding the adjuster screw in place.

It is possible to adjust the fuel pressure with the engine running, but it is important to note that the Edelbrock sump is a returnless system, so there is no return line. The sump pump needs a vent line back to the tank, which should be mounted high in the tank, ideally in the fuel filler neck.

Frequently asked questions