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Set-up and Tuning:

Spark advance or Retard

Once installed the unit can be adjusted for improved performance.  If detonation is experienced then the spark is too far advanced for the octane or the fuel mixture is too lean.  The best way to monitor detonation is using a scantool (e.g. Scanmaster) to monitor knock retard.

The Spark Base setting can be turned clockwise too advance the spark timing.  A few degrees can add additional punch to the vehicle’s acceleration.  Spark base controls spark timing at every RPM.

The Spark WOT setting can be turned clockwise to advance the timing at RPM’s over 3000.  Counter clockwise settings retard the timing.  Generally, cars without ‘power adders’ like N2O, superchargers, and turbo’s will perform best with a few degrees of spark advance.  When power adders are used, then the spark is usually retarded to prevent detonation at the high power levels.

The Spark Base and WOT settings are added together in the Timing Tuner.  If 3 degrees of Base and 3 degrees of WOT are selected, then the engine will operate with 3 degrees of advance below 3000 RPM and 6 degrees of advance above 3000 RPM.  The Timing Tuner cannot add more than 7.5 degrees of total advance,  or  12 degrees of total retard.

There are several settings that retard timing progressively with increasing RPM.  These are intended for use with centrifugal superchargers that deliver increasing boost with increasing RPM.

When N2O is used the adjustment of  the main controls (Base, WOT) is the same.  When the N2O system is activated, the RTD setting is activated as well.  The RTD setting is only retard and is subtracted from the total of the main controls.  Generally, 2 degrees of retard are required for every 50 horsepower of N2O used.

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