Edelbrock 3530 - Manual (Page 28)

28
Pro-Flo EFI Installation Instructions ©2005 Edelbrock Corporation
Rev. 2/05
Brochure #63-0273
Catalog #3530 & #3531
ELECTRONIC ENGINE MANAGEMENT
The Edelbrock Pro-Flo system uses the Speed-Density method of electronic engine management, in which fuel and spark
requirements are based on engine speed (RPM) and engine load (manifold pressure and temperature).
The Electronic Control Unit (ECU) receives signals regarding engine speed (from the distributor), and the three load factors consisting
of coolant temperature (ECT), Manifold Absolute Pressure (MAP) and air temperature (MAT). Once the ECU has determined the
engine operating point (RPM and Load factor), it uses tables programmed into it to instantly calculate correct spark advance and
injector pulse width.
A more detailed description of electronic engine management can be found in the Owner’s Manual for your Pro-Flo system. One
possible point of confusion does need to be clarified. The Pro-Flo system displays vacuum rather than the less-familiar manifold
pressure. This vacuum reading is based on the following SAE standard atmosphere:
Barometer - 29.5 in Hg
Temperature - 77°F
Because of this, the vacuum figures displayed on the Calibration Module may differ from the vacuum indicated by a true vacuum
gauge, particularly at extreme high or low altitudes.
The Pro-Flo tables come pre-set from factory for the engine
combination that you specified when you ordered your
computer chip. This factory calibration must be altered with
the Calibration Module to optimize performance. The
Calibration Module allows you to modify the fuel and spark
tables at various engine speeds and levels of vacuum. These
tables may be used for recording your modifications to the
base table with your own fuel pulse width and spark advance
figures. For information on using the Calibration Module to
enter your figures into the Pro-Flo ECU, refer to the
CALIBRATION MODULE section in the Owner’s Manual.
1000 2000 3000 4000 5000 7000
WOT
6"
12"
18"
LOAD
RPM
FUEL MODIFIER TABLE
1000 1750 2500 3500 4500 6000
WOT
9"
18"
RPM
LOAD
SPARK MODIFIER TABLE