Edelbrock 3550 - Manual (Page 26)

26
Pro-Flo EFI Installation Instructions
©2005 Edelbrock Corporation
Brochure No. 63-0115 Rev. 10/05
OTHER APPLICATIONS
The Pro-Flo system has been designed and calibrated specifically using the Chevrolet 454 c.i.d. Big-block with large-valve style cylinder heads
(such as Edelbrock’s Performer RPM Street Cylinder Heads with 2.25-inch valves) and tubular headers as a baseline.
It is unlikely that every engine on which the Pro-Flo system is installed will match this baseline combination. The system can be used with similar
applications, as long as the correct chip matching your cam profile is installed in the computer and necessary fuel calibration adjustments are
made. If your Big-block is not a 454, does not have headers, and uses small-valve style cylinder heads (such as Chevrolet aluminum HO heads
with 2.02-inch valves), it may require additional tuning adjustments. For further information refer to the SYSTEM SET-UP SECTION of the Owner’s
Manual.
If you are running small-valve heads and/or you are not using tubular headers, it may be necessary to adjust the air/fuel ratio at WOT from 4000
rpm and up. Refer to the table below for starting points for adjustments. Refer also to the SYSTEM SET-UP section in the Owner’s Manual. Use
the FUEL @ WOT screens (located under FUEL MODIFIERS) to adjust the fuel at each available RPM..
It should not be necessary to lean the fuel calibrations at 12” or 18” vacuum.
WARNING: Watch the Rich/Lean light on the Calibration Module. If the light indicates a lean condition (red) for more than a fraction of a second at
06” vacuum or WOT you are too lean for safe engine operation at full load.
SYSTEM START-UP
Once the Edelbrock Pro-Flo system has been installed, there are a few procedures you must follow to break-in the system. Carefully performing
these break-in procedures will ensure best results and optimal performance.
Use this checklist to double-check the following areas BEFORE starting the car:
❑ Has the battery been reconnected?
❑ Has the radiator been refilled with coolant?
❑ Has the gas tank been refilled?
❑ Has the oil been replaced?
❑ Have all linkages been reconnected?
❑ Have all wiring harness connectors been connected?
❑ Have all fuel lines been reconnected?
❑ Has the exhaust system been completely re-installed?
❑ Has the O
2
sensor been installed and connected?
❑ Have resistor type spark plugs been installed?
Distributor Test
Refer to the “IGNITION SYSTEM” section of this manual, under “DISTRIBUTOR TESTING” for the proper procedure.
Priming The Fuel Pump
Before the engine is started, the fuel pump must be primed to pressurize the system and purge the fuel line of all air.
1. Turn ignition key to the ON position. You should hear the fuel pump go on. It will pump for 2 or 3 seconds and disengage.
2. Turn the key to the OFF position for 1 second.
3. Turn the key to the ON position again. The pump will go on for another 2 or 3 seconds.
4. Repeat this procedure until the pump has been cycled three or four times, and is primed. The tone of the fuel pump will change when all air
is out of the fuel system.
5. If there is no tone, or no change in tone, the system is not priming. Check the entire fuel system for leaks, from the fuel tank to the injectors.