MSD 2960 Atomic LS7 Master Kit Installation - Manual (Page 17)

INSTALLATION INSTRUCTIONS 17
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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
ADVANCED SETUP
The Advanced Setup features are optional as the Initial Setup
menu provides the Atomic EFI with the values needed to run
the engine. Features in the Advanced Menu are designed to
deliver additional features and advanced tuning functions to
further enhance the drivability and overall performance of the
engine.
Fans: This setting sets the temperatures to activate two electric
fans. Each circuit will be activated by supplying ground
through the Red (Pin A) and Orange (Pin H) wires of
the GT-Series 16 pin harness from the Power Module. A
relay is required for both circuits since those wires are a
low current ground. The fans will activate at the desired
temperature and will remain on until the temperature
falls below 10° of the setting. Settings are 100°-300°F
(Figure 27).
A/F Targets: The Atomic LS provides an option to set an air/
fuel target for Idle, Part Throttle, Wide Open (WOT),
Nitrous and Boost. The Atomic will use its self-learning
technology to adjust the fuel delivery to meet the target
air/fuel ratio. The values are adjusted in 0.1 increments
and range from rich at 10:1 to dead lean at 16:1. The
ideal air/fuel ratio for cruising is called stoichiometric
and is commonly referred as a 14.7:1 air/fuel ratio. (Fig )
Boost: The Atomic will switch to the commanded boost
A/F ratio once the manifold pressure reaches 110Kpa
(approximately 16psia - 32.5in/Hg).
Ignition Timing: The Atomic provides a base timing table for
each engine application. You can also modify these
settings at idle (closed throttle), part throttle, wide
open throttle (WOT), nitrous, and boost. Each setting
is adjustable +/-10°. Note that the values programmed
are set for stock engines using 91 octane fuel. For lower
octane fuels it is recommended to retard the timing 5°
as a starting point. Timing can be retarded up to 20° in
0.1° increments. Note that in order to alter the timing for
nitrous use, the Nitrous Selection in the Advanced menu
MUST be programmed to ENABLE. When the nitrous is
activated by supplying 12 volts to the Brown/White (Pin
C) wire the timing will retard (Figure 27).
TPS Enrichment: To assist in throttle transitions the Atomic
EFI has a feature to increase fuel delivery by a prescribed
percentage any time there is an increase in throttle
position. If needed, make small changes in no more than
5% increments without further testing. Most engines will
find 25% being sufficient. Most applications will accept
15%-35% enrichment. Adjustable from 0-100% in 1%
increments (Figure 27).
TPS Enrichment
Igniton Timing
Advanced Setup
Fans
A/F Targets
Figure 27