27
Rotor Phasing
When using a crank trigger, the distributor’s orientation in the engine is not critical to the ECU.
However, it is still important to phase the rotor to the cap. This will ensure that the rotor is in
the correct position throughout the timing sweep in order to fire to the correct cylinder terminal.
If the rotor is not properly phased, during operation the rotor tip can sweep too far away from
the correct terminal, causing a weak spark or misfire and a lot of electrical noise.
1. Roll the engine over to 30° BTDC. 30° is a good average timing that will work well with
most EZ-EFI
®
installations. If you know that your engine will be running significantly
higher or lower timing, please adjust accordingly.
2. Set the distributor to the #1 position and drop it into the engine. Do not clamp it down yet.
3. Set the cap on the distributor and mark the middle of the #1 terminal on the distributor
body. Remove the cap.
4. Rotate the distributor body until the center of the mark you made is lined up with the center
of the rotor tip. Then clamp down the distributor and install the cap.
5. Your rotor is now phased.
B.
FAST™ Dual-Sync Distributor
– The FAST™ Dual-Sync Distributor is designed as a
“locked out” unit. It has no weights or springs or vacuum canisters. Once it is set in place, it
provides a crank signal that does not move with engine speed or load - exactly what the EZ-
EFI
®
needs. Also, the rotor is pre-phased from the factory at 30° BTDC.
Roll the engine over to TDC on #1 compression stroke. Follow the instructions included with
the distributor for a TDC install. The built in LEDs will indicate when the distributor is lined
up correctly. Because the FAST™ Dual-Sync Distributor is pre-phased, no extra steps are
required to achieve proper rotor phasing.
An alternate installation method can be used that does not require the distributor to be powered.
1. Verify that the module in the distributor is installed in the 0° position. (Refer to the
instructions included with the distributor for details.)
2. Roll the engine over to 30° BTDC.
3. Set the distributor to the #1 position and drop it into the engine. Do not clamp it down yet.
4. Set the cap on the distributor and mark the middle of the #1 terminal on the distributor
body. Remove the cap.
5. Rotate the distributor body until the center of the mark you made is lined up with the center
of the rotor tip. Then clamp down the distributor and install the cap.
6. Your crank signal is now set and your rotor is phased. Because the FAST™ Dual-Sync
Distributor is pre-phased at 30° BTDC, lining up the rotor tip and terminal with the engine
at 30° BTDC also puts the pickup in the correct location.
The “DISTRIBUTOR” connector in the harness mates directly to the distributor.
There is also a “DISTRIBUTOR POWER” wire in the harness to feed the power wire on the
distributor. The mating male terminal is supplied loose in the kit. It can be installed on the
distributor’s power wire to complete this connection.
In the Setup Wizard, select “FAST Distributor” on the Ignition Type screen.
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