Dynatek Dyna 2000i Programmable - Manual (Page 4)

! ! ! ! VOES/RTD LED FUNCTION
The green VOES/RTD LED lights when the violet wire is grounded . With the ignition in normal mode and the
VOES connected, the green LED will be on most of the time (engine vacuum present). In Retard Mode, the LED
can be used to check operation of the retard controller. (See RETARD MODE USING THE VOES WIRE below.)
! ! ! ! V.O.E.S. SWITCH
All late model Harley-Davidson engines incorporate a Vacuum Operated Electric Switch (VOES) in the intake
manifold to sense engine load. During part throttle operation when manifold vacuum is high (i.e., light engine load),
the switch closes, grounding the violet wire and causing the timing to advance more rapidly.
This improves gas milage at cruising speeds and provides crisper part-throttle response while preventing
detonation during heavy engine loading.
! ! ! ! RETARD MODE USING THE VOES WIRE
This mode provides a convenient ignition retard for nitrous or turbo equipped bikes. When switch 1 is ON, the violet
wire acts as a retard trigger. To use this function, the violet wire is connected to a switch or relay that will ground it
at the desired time. The violet wire should not be connected a VOES when set for retard mode.
When activated, timing will be limited to 25 degrees regardless which advance curve is selected. When the violet
wire is not grounded, timing will follow the quick version of the selected advance curve. The following chart
indicates how much retard can be achieved:
Final Timing Final Timing with
Curve # for Curve Retard Activated Total Retard
1 35 degrees 25 degrees 10 degrees
2 35 degrees 25 degrees 10 degrees
3 32 degrees 25 degrees 7 degrees
4 30 degrees 25 degrees 5 degrees
! ! ! ! TUNING TIPS - ADVANCED
Occasionally, best performance may fall somewhere between the curves programmed into the 2000i. By rotating
the module clockwise (advanced) or counter-clockwise (retarded), the entire curve will be shifted up or down. Be
aware that if you advance the ignition, your final timing will be increased. Excessive advance may cause pinging
and hard starting, so only turn the 2000i one or two degrees at a time and note any changes to the motor.
For racing applications, the advance can be set to always come in quickly by using NORMAL VOES mode and
permanently connecting the violet wire to ground. These curves are similar to what is generated by a mechanical
advancer.
For heavy bikes or built motors that tend to detonate, the advance can be brought in more slowly. If the VOES wire
is left unconnected, the advance will always follow the slower rpm curve shown on the graph.
2801103 Rev. C