MSD 2950 Atomic LS2_LS3 Master Kit Installation - Manual (Page 16)

16 INSTALLATION INSTRUCTIONS
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• W W W . A T O M I C E F I . C O M • ( 9 1 5 ) 8 5 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4
may require more. If needed make small changes of
no more than 5% increments without further testing,
25% is sufficient for most engines but between 15-35%
is normal. Typically, the higher the vacuum the higher
the percentage needed. Adjustable from 0-100% in 1%
increments.
Nitrous: If you are planning on running a wet nitrous system
on your LS engine, you will need to select Enable. There
is a Dark Brown/White wire from the Power Module
that needs to be connected to the switched 12 volts
that activate the nitrous solenoids. When 12 volts are
supplied (nitrous is activated) the Atomic LS will trim
the Target Air/Fuel Ratio and the ignition timing to the
programmed setting (see the A/F Target and Timing
settings above).The default is Disable.
Calibrate Speed: If there is speed output on the transmission,
a reference signal can be delivered to the Atomic LS.
This will assist in smooth transitions between shifts or
for quick transitions from high rpm to idle conditions.
The Power Module has a Brown wire and a Light Blue
wire. These wires connect to a magnetic pickup on a
driveshaft such as a driveshaft sensor from Racepak.
To program the calibration, have a passenger use the
Handheld Monitor as you drive to 40mph. Once 40
mph are obtained, select YES on the handheld. This will
calibrate the speed input.
Racepak Dash: If you are running a Racepak Dash, such
an IQ3, the Atomic can communicate information to the
unit. Select Enable if using a Racepak dash. Disable
is default. Racepak offers an optional V-net sensor to
connect their dash to the MSD Can-Bus connector.
Racepak Dash Option
Speed Reference Setting
MAP Enrichment Setting
Enable or Disable Nitrous
Figure 21