Manual

ManualsBrandsFuelab ManualsCar54501 Fuel Pressure Regulator

Plug

Jam Nut

Flat Washer

(2X) Bracket Lock Washers (2X) Bracket Screws

Bracket

Regulator

Barbed Fitting

Adjustment Screw

(3X) -906 O-ring

105020421-1, No Rev Sheet 1 of 4

Model Number 54501-c

Fuel Pressure Regulator

Operating and Installation Instructions

This product is to be installed only by persons knowledgeable in the repair and modification of vehicle fuel systems

and general vehicle systems modification. Only a qualified technician or mechanic who is aware of applicable

safety procedures should perform the installation of this product.

GASOLINE AND OTHER FUELS ARE FLAMMABLE AND CAN BE EXPLOSIVE!

Perform the installation in a well ventilated location only to minimize the build up of fuel vapors.

open flames,

smoking or other sources of ignition are to be present during installation, to prevent fire or explosion that can cause

serious injury or death. Grinding, cutting, and drilling must be performed with care to prevent ignition. Draining and

removal of all fuel and ventilation of vapors in vehicle and fuel system is recommended when performing such

procedures. Proper eye and personal protection is required at all times during installation.

The Vehicle’s fuel system may be under pressure! Do not loosen any fuel connections until relieving all fuel system

pressure. Consult an applicable service manual for instructions to relieve fuel system pressure safely.

This product is intended for racing, off-road, or marine use only. This fuel system component is capable of altering

engine tuning and therefore not legal for sale or use on emission controlled motor vehicles.

Product Contents:

Check the diagram and list of components

(right) to ensure that no components are

missing from box. Contact your Fuelab

distributor immediately for replacement.

54501-c Features and Performance Ratings:

Inlet Port Size -6AN Military Port

Seat Size Standard

Regulation Slope 5.75 PSI/GPM

Maximum Flow

Capacity

2.5 GPM at 25 PSID

(570 LPH at 1.75 Bar)

Pressure

Adjustment Range

Pressure Range “E”

25-90 PSID

(1.75-6.2 Bar)

WARNING!

Exceeding maximum flow capacity may result in an over-pressure operating condition.

Before Installation, Plan Entire Fuel System:

These instructions are limited to general topics of regulator component installation and may not include specific

information pertaining to your application. These instructions are written assuming the use of an electric fuel pump

capable of at least 100 PSIG outlet pressure and limited to the specified

Maximum Flow Capacity

(above). This

regulator has an internal spring that can be changed for other pressure ranges, including “T” range, for 10-25 PSID

if required by the specific application. Lower, carbureted pressure ranges are recommended for a different model of

regulator only. Visit our company website for specific details pertaining to example fuel systems and other solution

ideas. Additional information including advanced troubleshooting, any special alerts and FAQ’s pertaining to this

and other products is also available.

General Regulator Performance Notes:

The notation “PSIG” means pressure in Pounds per Square Inch (PSI) relative to the prevailing atmospheric

condition or outside air. This is referred to as Gauge Pressure. The notation “PSID” means pressure in PSI relative

to another pressure source or called the Differential Pressure. The intake manifold pressure, when plumbed to the

regulator, changes the fuel pressure in a 1:1 ratio. When the engine idles (for example 12 Inches of Mercury or 6

PSIG of vacuum) fuel rail pressure will lower 6 PSI, when compared to the setting with the engine off. For boosted

applications, including turbo or superchargers, fuel rail pressure increases at a 1:1 ratio. An engine at 10 PSIG of

boost as measured in the intake manifold, will increase the fuel pressure by 10 PSIG. The actual readings of

pressure in a real world application would show a lower pressure, as the engine is using fuel that would normally be

returning back through the return line when the engine is off. The amount of pressure difference to expect is a

function of how much flow the engine is using (reference

Regulation Slope

, above).

Summary of content (4 pages)

PAGE 1
Model Number 54501-c Fuel Pressure Regulator Operating and Installation Instructions CAUTION! This product is to be installed only by persons knowledgeable in the repair and modification of vehicle fuel systems and general vehicle systems modification. Only a qualified technician or mechanic who is aware of applicable safety procedures should perform the installation of this product.
PAGE 2
Plumbing Planning Notes: Minimize plumbing restrictions between fuel rail(s) and regulator for peak performance, use –6AN (3/8”) to –10AN (5/8”) line as required per flow rate requirements of the vehicle’s engine and fuel pump. EFI applications can use a “Y” block or “T” fitting to split the output of the fuel pump into one end of each fuel rail (for dual fuel rail application) then plumbed into single inlet port. Use of a –6AN (3/8”) return line is typically recommended for this model of regulator.
PAGE 3
4. Apply light oil onto the threads of the Adjustment Screw. Small amounts of air leakage in the adjustment hardware may be present during operation. This is a normal operating condition. Thread the Adjustment Screw by hand until a slight tension is felt, this position is the minimum pressure setting. Do not tighten screw any further. Pressure is to be adjusted later in these instructions. Install the Flat Washer, then the Jam Nut. Tighten the Jam Nut hand tight for later adjustment. 5.
PAGE 4
LIMITED WARRANTY FUELAB, a division of FCP, Inc. , having its principal place of business at 826A Morton Court, Litchfield, IL 62056, USA ("Manufacturer") warrants its FUELAB products (the "Products") as follows: 1. Limited Warranty. Manufacturer warrants that the Products sold hereunder will be free from defects in material and workmanship for a period of 2 Years from the date of purchase to the original purchaser.