Lingenfelter L460145297 Lingenfelter LNC-2001 LS Timing Retard Launch Controller LSA LS9 v1.7 - Manual (Page 10)

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Timing retard analog input (Linear Mode)
The timing retard analog input mode (Linear Mode) is a new feature for the LNC-2000 and LNC-2001.
Linear mode allows the user to input a voltage which will correspond to the amount of timing retard
that will be activated. This input voltage can be provided by many different external devices, including
nitrous controllers (such as the LPE NCC-002 nitrous controller) or via custom wiring configurations.
The LNC-2001’s Linear Mode recognizes voltage ranges of 0.2-4.8 volts. At 0.2 volts and below the
timing retard is set to 0 degrees while at 4.8 volts the LNC is at full timing retard of 15 degrees. The
maximum retard setting still dictates the maximum amount of timing that can be taken out; however, it
does not change the scaling of the linear mode. For example, if you want to retard the timing 8 degrees
maximum, you would need to set the Max Retard dial to “8”. It would take 2.45 volts of input in order
to reach 8 degrees of timing retard. Any voltage past that point will not cause the LNC to further retard
the timing since the maximum set value is 8 degrees. Linear mode on the LNC-2001 is activated by
setting the “Rate” dial to setting “F”. The linear (purple) signal wire is the voltage input wire and
should be connected to a voltage output source. The linear (black) ground wire should be hooked up to
a ground source. These wires are part of the MAP sensor electrical connector. When the Rate switch
is in the “F” position, the LNC enters linear mode regardless of whether the MAP sensor is connected
or not. When you activate the orange +12V Retard Activation wire it will override linear mode and go
into Max Retard mode. There are 3.26 degrees of timing retard per volt.
Timing retard analog output
The LNC-2001 provides an analog voltage output that indicates the amount of timing retard that
is being applied. The gray analog output wire provides a linear 0 to 3 volt DC output with 0 volts
indicating 0 degrees of timing retard and 3 volts indicating 15 degrees of timing retard. This voltage
value can be logged with EFILive, HPTuners, DashDAQ or other devices to allow you to determine
how much timing you really had while going down the track.
Note - because the LNC-2001 modifies the ignition timing after the PCM or ECM, the factory computer
is not aware of the changed timing so it will not display the modified timing value in a scan tool.
Timing retard return ramp rate
When the timing retard is disabled, the LNC-2001 returns to the stock timing using the ramp rate of 0.5
degrees per cylinder firing event until it is back to 0 retard.
For example, at 6000 rpm you have 400 firing events per second so each event is 0.0025 seconds apart.
If you had the maximum retard of 15 degrees activated and then disabled the timing retard, it would
take 0.0375 seconds to return to 0 retard (full timing). At 1500 rpm you have 100 firing events per
second so each event is 0.01 seconds apart and it would take 0.15 seconds to return to full timing if you
were at 15 degrees of timing retard.