123ignition 123-TUNE-4-R-V User Manual page 10

- Enable Tuning
GB
When the engine is running, you could press the 'T' to enable real-time 'TUNING' mode.
( the curve-indicator-light on the dashboard will blink 'TUNE', to indicate that the tuning-mode is
active.
By pressing 'A' ( advance ) you can increase the total amount of advance with a maximum of 5,0 degrees
crankshaft, in steps of 0,1 degrees.
By pressing 'R' ( retard ) you can decrease the total amount of advance with a maximum of 5,0 degrees
crankshaft, in steps of 0,1 degrees.
This feature will come in handy, if you have your car on a rolling road, and want to optimize the engine-
power. The advance or retard found is not stored in any way, so you will have to remind your findings,
and adapt the active advance-curve accordingly.
- RPM-stopwatch
If you don't have a rolling road available, it is also possible to use a flat piece of road. Here is what
you should do : drive until the engine is warmed up, remove the vacuum-hose, and activate the 'RPM-
stopwatch'. Enter the two engine-speeds to the area of your interest.
Drive the car at maximum-power ( and in one gear ) through that area, and measure the time needed.
( this time will be displayed in steps of 0,1 seconds )
After having changed the centrifugal advance-curve, you can work your way towards a minimum time,
indicating you have found the optimum power in this specific area.