Example for settings on Ultima SF Hi-Perf. & Crane HI4 Ignitions
1. Follow the Manufacturers instruction to set the Static timing and understand the
instructions. Make sure you have the engine on TDC (TF on the Flywheel) on the Front
Cylinder on the compression stroke before you begin. The ignition will be nearly vertical
— slightly to the 1 o’clock position if you got it right.
2. Set the ignition to the OEM with VOES mode but do not install the VOES switch. Instead
tape up the wire — Do NOT Ground this wire on the HI4 System or Ultima ignition system.
3. Put the ignition in Kick Start Mode as they will fire on the first revolution and typically
start much easier this way.
4. Set the Rev Limit to Minimum for Break-in.
5. Set the Rear Cylinder Advance to “O”.
6. Look in the Manufacturers instructions at the Curves produced by the ignition when in the
OEM with VOES mode. Look at the Low vacuum
set of curve as this is what you will get when no VOES switch is present. The instructions
show a MAX advance curve and a MIN advance curve for this scenario. When you turn the
Spark Advance dial on the face of the ignition to MIN you will get the curves shown
as MIN and as you turn the dial towards MAX you will get something linear between MIN
and MAX. As you can see the MIN is around 26 degrees and the MAX is about 30 Degrees
full advanced. For a 120 or 127 set the Advance slope dial to MIN for a total advance of 26
degrees. For a 113 set the Spark Advance dial between 3/4 to full advance for approximately
28-30 degrees of total advance.
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