How to Adjust an Aeromotive Fuel Pressure Regulator. The use of a fuel pressure regulator within any car or truck ensures that the system pressure remains constant, allowing the fuel to properly atomize. Aeromotive's line of fuel pressure regulators is a popular aftermarket addition to performance-based cars, such as street rods and muscle cars. However, because every vehicle is different, adjusting an installed Aeromotive fuel pressure regulator is essential for optimal performance.
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This involves not only understanding the function of the system and its adjustment needs, but also the precise system for adjusting Aeromotive's units. Understanding the Fuel Pressure Regulator.
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Optimizing the fuel consumption and power of any vehicle with a fuel-injected engine is a precise process, which is why the role of the fuel pressure regulator is so important. This system, which includes the regulator unit itself along with a vacuum hose and mounts, is usually located along the fuel rail. Some manufacturers, however, such as Dodge, mount the fuel pressure regulator inside the fuel tank itself, by the fuel pump. How the Fuel Pressure Regulator Works.
The main role of the fuel pressure regulator is to keep the pressure in a fuel-injected system constant in order to ensure that the fuel atomizes correctly. The idea is to force the fuel pump to balance the amount of fuel pumped with the right amount of pressure needed to bypass the regulator. The regulator sets this limit using a spring, which presses up against a diaphragm. Only the right combination of fuel and pressure can make it past the spring, and the remaining fuel goes back into the fuel tank via a return line.
It is the pressure of that spring that users must adjust in order to optimize the performance of the regulator and set it for the needs of their vehicle. Aeromotive Fuel Pressure Regulators and Performance Vehicles. Aeromotive fuel pressure regulators are specifically designed for performance vehicles such as street rods, muscle cars, and pro street vehicles.
While some drivers never even realize they use a fuel pressure regulator, much less consider adjusting it, performance engines require a more precise tuning for optimal return. Most specifically, changing the pressure settings on the regulator optimizes the air-to-fuel ratio (AFR) within a high-performance fuel injected engine system and allows drivers to increase their wide-open-throttle (WOT) power. The goal of adjusting pressure is to make a noticeable impact on engine performance and resulting power.
Basic Adjustment of Aeromotive Fuel Pressure Regulators. The exact pressure needed to achieve maximum WOT power varies according to each vehicle's system, design, and needs. Aeromotive recommends adjusting the fuel pressure of any vehicle, and specifically EFI vehicles in small increments in order to avoid engine damage while discovering the vehicle's optimal pressure number. Adjustment Process.
To begin, disconnect the vacuum line from the fuel pressure regulator and connect a fuel pressure gauge if one is not already present. Start the vehicle's engine, and read the starting pressure on the gauge.
Most OEM pressures start with a setting of 43 psi without the vacuum line attached, with a possible range of 40 to 75 psi. Next, locate the adjustment screws. Turn the screws clockwise to increase pressure, or counterclockwise to decrease pressure. Once the desired psi is reached, tighten the regulator adjustment jam nut. Finally, reattach the vacuum hose. Perform a Test Drive. Once an adjustment is complete, it is important to test drive the vehicle for a short distance to ensure that everything is operating as needed.
If trying to find an ideal pressure setting, it may be necessary to repeat the adjustment after the test drive to increase or decrease fuel pressure as needed. After the final test drive, it is also important to recheck the interior system to ensure that there are no fuel leaks. How to Buy an Aeromotive Fuel Pressure Regulator on eBay. Shopping on eBay is a great way to find an Aeromotive fuel pressure regulator to add to your performance vehicle. The vast inventory of automotive equipment is easy to search through by using the main search bar, located on every page of the site. Simply type in a general term, such as "fuel pressure regulator," and then use the provided filters to narrow selections by the Aeromotive brand as well as other important factors like price and condition.