Fast 30400-KIT-EZ-EF, Instructions Manual

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26
Single Coil, Distributor Equipped Engine – WITHOUT Timing Control
In this scenario, ignition is handled just like it would be with a carburetor. It could be an old
mechanical points distributor or any number of more modern solutions for ignition on carbureted
engines. In any case, something else is driving the coil and determining when it should fire. The EZ-
EFI
®
just needs to know each time the coil fires. That will tell it engine RPM. If a CD ignition box is
being used, EZ-EFI
®
will get its RPM signal from the ignition box’s “tach” output. If a traditional,
dwell-controlled inductive coil ignition system is being used (no CD ignition box), the EZ-EFI® will
get its RPM signal by going through the RPM Module to the negative side of the coil. See the RPM
Module section for much more detail and important warnings.
In the Setup Wizard, select “NONE” on the Ignition Type screen.
If using…
CD Ignition
Traditional Inductive
Coil Ignition
Harness
Connections
Inputs
"DISTRIBUTOR" n/c n/c
"CRANK TRIGGER" n/c n/c
"RPM INPUT"
CD Ignition
Tach Output
RPM Module
Output "POINTS OUTPUT" n/c n/c
n/c = no connection
Single Coil, Distributor-Equipped Engine – WITH Timing Control
In this scenario, EZ-EFI
®
needs to know engine position – not just engine speed – so that it can
command a spark at specific points in the engine cycle. EZ-EFI
®
will be looking for a crank signal to
occur at or very close to TDC. This signal needs to occur in the same spot all the time. It cannot move
around with engine speed or load as it would in a distributor with mechanical and/or vacuum advance.
If the crank signal moves around, so will the actual ignition timing. This is beyond the control of the
ECU. The ECU only has full and final control of ignition timing when it is fed a steady, consistent
crank signal. There are several ways to provide this.
A. FAST™ Crank Trigger – The FAST™ Crank Trigger consists of a trigger wheel that attaches
to the crank and a sensor that watches as the teeth pass by. Roll the motor over to TDC on #1
compression stroke. Install the trigger wheel and sensor bracket so that the sensor is lined up
with one of the teeth on the trigger wheel.
The “CRANK TRIGGER” connector in the harness mates directly to the sensor.
In the Setup Wizard, select “FAST Crank Trigger / 2 Wire” on the Ignition Type screen.