Manual

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(3X) Bracket Lock Washers

Adjustment Screw

Electronic Regulator

Barbed Fitting

Plug

Jam Nut

(3X) Bracket Screws

Bracket

Electrical Plug and Wire

Flat Washer

109020122-1, No Rev Sheet 1 of 6

Model Number 52902-c

Electronic Fuel Pressure Regulator

Operating and Installation Instructions

This Product is protected under one or more of the following patents: US 7,810,470

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. NO 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 may not be legal for

sale or use on emission controlled motor vehicles; consult local, state and national laws.

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.

52902-c Features and Performance Ratings:

Fitting Sizes -8AN Male Fitting

Seat Size Standard

Operating Voltage 8-18 Volts DC

Maximum Flow

Capacity

6.3 GPM at 35 PSID

(1440 LPH at 2.4 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 a Fuelab Prodigy

Electronic Fuel Pump. This regulator is ONLY compatible with Prodigy Fuel Pumps (Prodigy Models 41401-c,

41402-c, 41403-c, 42401-c and 42402-c, not compatible with Prodigy Models 41404-c, 40401-c and 40402-c). This

regulator has an internal spring that can be changed for other pressure ranges, including “G” range, for 90-125

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.

Summary of content (6 pages)

PAGE 1
Model Number 52902-c Electronic Fuel Pressure Regulator Operating and Installation Instructions This Product is protected under one or more of the following patents: US 7,810,470 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 –8AN (1/2”) 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 the single inlet port. Use of a –8AN (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
How does the Electronic Regulator Work? Just like standard EFI regulators, these regulators begin to relieve pressure (back to the fuel tank) once the set pressure is achieved. As more and more flow is sent through the regulator (pressure climbs a little higher with extra amount of flow), the regulator relieves the excess flow back to the fuel tank. Our Patented Electronic Regulator (per U.S.
PAGE 5
Electrical Planning Notes: Use Male Connector with wire (Provided with Regulator), to allow a sealed electrical connection to the Electronic Regulator. The regulator requires very little power, and does not control the input power to the fuel pump. Follow the Wiring Schematic Diagram provided with the Fuelab Prodigy Series Fuel Pump, to properly wire power and ground leads to pump.
PAGE 6
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.