MSD 2960 Atomic LS7 Master Kit Installation - Manual (Page 18)

18 INSTALLATION INSTRUCTIONS
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MAP Enrichment: To assist in manifold pressure transitions
the Atomic EFI offers a MAP enrichment feature. This
function adds fuel based on MAP transitions while
moving the throttle. Large cam vehicles with low vacuum
generally required a slightly smaller number while stock/
small camshaft vehicles with a high vacuum 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 (Figure 28).
Nitrous: This setting enables the nitrous timing retard in the
Ignition timing and the nitrous AFR in AF Target setting.
The default setting is DISABLED (Figure 28).
Calibrate Speed: If there is speed output on the transmission,
a reference signal can be delivered to the Atomic LS. On
manual transmission equipped vehicles, the Calibrate
Speed option improves drivability when transitioning
from high RPM conditions to an idle (such as comming
off of a hill / between moving and coming to a complete
stop). The Power Module has a Brown (Pin D) wire
and a Light Blue (Pin E) wire. These wires connect to
a magnetic pickup monitoring driveshaft speed with a
collar mounted on a yoke. To program the calibration,
drive to 40mph on an open road to maintain speed.
Once at 40mph, select YES on the handheld. This will
calibrate the speed input. This option will also enable a
speedometer reading in the handheld Atomic LS Dash
(Figure 28).
Note: Use of a minimum four magnet collar is
recommended with this option.
Racepak Dash: This setting allows the Atomic LS Truck kit
to interface with a Racepak dash such an IQ3. Disable
is default. Racepak offers an optional V-net sensor to
connect their dash to the MSD Can-Bus connector
(Figure 28).
Racepak Dash Option
Speed Reference Setting
MAP Enrichment Setting
2-Step RPM Limit
Enable or Disable Nitrous
Figure 28