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Features and Auxillary Wiring Diagrams:
DIP Switch and Rotary Switches
There are 2 dip switches on the ARC-2 module, and 2 rotary switches. All switches are read at power up, and not read after-
wards. This is for reliability in high vibration environments, and to ensure that settings can not be accidentally tampered with
while the engine is running. If you change switch settings, you will need to turn off the engine and restart it for the new settings
to be read.
Spark Restrike On/off
This DIP Switch allows the user to select between having the ARC-2 fire only one time at all RPMs, or having it restrike at
lower RPMs. This is useful for setting/checking engine timing, and also if there are other electronics that might be confused
by multiple sparks.
Coil Edge Select
The Coil Edge Select Switch allows the user to change how the input signal is read. It can be set to look for a signal from
the ECU for a standard coil, or can be set for a typical coil with driver. This changes the edge that the CD Ignition fires on.
With a standard coil and stock ignition, the spark occurs when the voltage to the coil goes from 0 to 12V. The ARC-2 looks
for this rising edge signal, and this is where it fires.
With a driver-in-coil setup (example: Mitsubishi Evo8), the spark occurs when the signal to the coil goes from 12V or 5V down
to 0V. So the ARC-2 looks for the falling edge signal, and this is where it fires.
Two Step Launch Limiter
The Two Step Launch limiter allows the user to pre set a lower RPM limit that can be enabled or disabled with a switch. This
is often used in drag racing as a way to get quicker, more consistent launches. The limit allows the driver to keep the gas pedal
floored and the engine held at that lower RPM, which also allows turbos to spool up before the start of the race. Then when
it is time to go, the driver is able to leave the gas floored, and just adjust the speed of the clutch release to get the fastest
possible launch. The launch limiter is enabled with a switched input. Select a quality switch to mount on the clutch lever or
pedal. Grounding the input wire enables the launch limit, removing the ground disables the launch RPM limit, and allows the
engine to rev to its normal RPM limit. Launch limiters are normally wired to a clutch switch that shuts the limiter off automat-
ically once the clutch is released.
The ARC-2 launch limiter is adjustable from 3,000-11,900
RPM in increments of 100 RPM. To set the RPM for the
launch limiter, simply adjust the knobs on the ARC-2 to the
desired RPM. The knob labeled X1000 sets the RPM value in
thousands, and the knob labeled X100 sets the RPM value in
hundreds. For example, to set the launch limit to 6400 RPM,
you would set the X1000 knob to 6, and the X100 knob to 4.
Setting the X1000 knob to OFF disables the launch limit.
The launch RPM knobs are only read by the ignition at
startup, to prevent any sort of vibration problems. So if you
change the knobs with the engine running, it will not take
effect until the next time you shut down, and restart the
engine.
Tech Support: 1800-928-3962
VIOLET/WHITE
ARC-2
CLUTCH SWITCH
(not supplied)
Installation Guide- 9
2801211
BULLET
CONNECTOR
ground