Edelbrock Quiet-Flo Electric Fuel Pumps
Catalog #1790 (80 gph) & 1794 (120 gph)
INSTALLATION INSTRUCTIONS
Please study these instructions completely and thoroughly before installing your new Fuel Pump. If you have any questions or problems, contact our Technical Hotline at: 1-800-416-8628, 7 am - 5 pm Monday-Friday, Pacific Standard Time or e-mail us at edelbrock@edelbrock.com.
DESCRIPTION
Edelbrock Quiet-Flo Electric Fuel Pumps feature anodized aluminum housings and high quality internal construction, making them strong, durable, and quiet. #1790 features a -10 AN inlet/outlet, while #1794 features a -12 AN inlet/outlet. Both pumps are compatible with all grades of gasoline and methanol type fuels. Performance Specifications are listed below.
CAUTION
Installation of this product should be performed by persons knowledgeable in the repair and modification of high pressure automotive fuel systems. Do not loosen fuel system connections until relieving fuel pressure as recommended in your automotive service manual. Fuel leakage will occur when loosening fuel system connections, eliminate potential fire hazards before loosening any fuel system connections.
PERFORMANCE SPECIFICATIONS
| 1790 | 1794 | |
| Outlet Pressure/Flow | 45 psi/80 gph (480 lbs/hour) @ 12 Volts | 45 psi/120 gph (720 lbs/hour) @ 12 Volts |
| Maximum Pressure | 90 psi | 100 psi |
| Current Draw | 12.5 amps @ 45 psi | 14.5 amps @ 45 psi |
Conversions:
1 gallon gasoline = 6.0 lbs (average)
1 bar = 14.5 psi
Diagram Descriptions
This diagram illustrates a typical fuel system layout from the supply side. It shows a Fuel Tank connected to a Pre-Filter (60 Micron Recommended), which then leads to the Fuel Pump. The Fuel Pump is shown mounted at or below the bottom of the Fuel Tank. From the Fuel Pump, fuel flows through a Fuel Filter (10-30 Micron Recommended) before continuing. Arrows indicate the direction of flow.
This diagram displays the fuel pump fitting assembly, with the #1790 model shown. It details the fuel inlet and outlet connections: for the #1790 pump, these are -10 AN fittings, requiring two Russell Part #670710 fittings. For the #1794 pump, they are -12 AN fittings, requiring two Russell Part #670730 fittings. The pump has electrical connections labeled 'BLACK -' for negative and 'RED +' for positive. Mounting brackets are integral to the body of the #1790 fuel pump; the #1794 pump also has integral mounting brackets.
INSTALLATION
- With the ignition "off" and engine cool, relieve the fuel system pressure.
- Disconnect the existing fuel pump lines. Plug the open fuel lines to prevent foreign matter from entering the fuel system. Remove existing fuel pump.
- Determine the new fuel pump mounting location. Remember, the fuel pump must be mounted at or below the bottom of the fuel tank.
- Replace existing fuel lines as necessary for proper fitment. Use existing bracket holes, if possible. Otherwise, for #1790, mark and drill mounting bracket holes using the brackets as a template. On 1794 fuel pumps, the mounting brackets are integral to the body of the fuel pump. Hold the fuel pump in position and use the mounting holes as your template.
- Assemble the bracket and fuel pump (On 1794, bracket assembly is not required).
- Install the fuel pump and bracket assembly in the desired location. Make sure the pump is facing the proper direction. The outlet is on the same side as the fuel pump's electrical connections.
- Pump Wiring: A RELAY IS RECOMMENDED FOR PROPER OPERATION. Edelbrock offers a 30 amp universal electric fuel pump relay, part #1795. Wiring instructions are included with the fuel pump relay. If a relay is not being used, connect a BLACK 12-gauge wire to the negative (-) terminal on the fuel pump, and to a quality ground location (Engine ground or negative battery terminal is recommended). Connect a RED 12-gauge wire (+) from a 12v key-on switched connection, such as a 30 amp relay, to the positive terminal on the fuel pump. Check to make sure power is only on when the key is on. Recommended 30 Amp inline fuse.
- Install the o-rings and fittings (fuel fittings and O-rings not included) and connect to your fuel lines.
- Check for leaks: Turn ignition to the "Run" position without starting the engine and check all connections for leaks. If any leaks exist, immediately turn key off and repair leaks before continuing.
Catalog #1790, #1794 Rev. 2/05 - RS/mc ©2005 Edelbrock Corporation Brochure # 63-0171
