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SMT6 Developers Manual - Ignition Modifications

SMT6 DEVELOPERS MANUAL

Perfect Power Online Manuals.

 

Support for your SMT6 Unit.

IGNITION MODIFICATIONS

This requires patience.

 

The word pickup is used often : it means a pickup sensor, either magnetic (reluctance), Optical, or Hall Sensor. The SMT6 can handle all types.

 

Engines, which operate on a "closed loop" knock sensor system, can't be ignition tuned, unless the knock sensor is disabled, which is not desirable!

 

Engines with a distributor require one pickup.

 

Engines without a distributor require two pickups, or one missing tooth pickup (which transmits TDC and firing information). Locate pickup(s) and check :

 

If it is missing tooth : Use MODE=1
If it is not, use : MODE=10, 11 or 12.

 

 

The choice of mode depends on the nature of the signals.
Put an oscilloscope on both signals, and trigger on the "TDC" or reference signal.
Then count teeth in-between, and relate everything to a single RPM. If the  distance (in degrees) between the reference signal ad the firing signal is smaller than the intended modification, then use MODE=10 or 11. If not, use MODE=12 (two ignitions).

In some instances it may be advisable to shift the reference signal only. Consult Perfect Power.

 

 

A special circumstance exists if the missing tooth "gap" is more than once per revolution. Consult Perfect Power for advice.

 

In order to confirm that the SMT6 can handle the ignition signals, it is advisable to "TEE" in the SMT6 inputs, and monitoring the inputs and outputs of the SMT6 in the correct mode. Confirm this on all signals and change polarity, trigger level and mode until the signal outputs are confirmed.