MSD 7730 Power Grid System - Controller Only Installation - Manual (Page 6)

6 INSTALLATION INSTRUCTIONS
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SHIFT LIGHT
Using the Shift Light controls opens a variety of options designed to help make sure the light is exactly as
desired. The shift light setting can be set by single rpm increments. In this control tab, each value can be
entered to the exact rpm desired and the light’s intensity can be adjusted so that it is visible without blinding.
The number of gears that appear on this tab will be auto-populated by the program after the number of gears
is set in the general settings. This can also be used with a relay as a transmission shifter. The maximum
current for this circuit is 3 amps.
Light Intensity: This percentage setting controls brightness of the shift light for easy use in both day and
night racing. If being used for anything other than shift light control, the intensity must be 100%.
Power-On Test: Normally set to on but can be turned off if desired. The power-on test turns the shift light
on as soon as the controller receives power to show that the circuit is complete and working.
Launch Light: The Shift Light will turn on if the engine rpm is between the launch low limit and the launch
high limit. The light will blink if rpm is above the launch high limit.
Gear 1-5: A setting can be adjusted for each individual shift. To do this enter the engine RPM that should
turn the Shift Light ON for each gear.
OUTPUT SWITCH
When the switch is activated it will supply ground to a circuit in order to turn an item on by time and/or rpm.
The circuit can maintain up to 2 continuous amps. If more than 2 amps is needed a relay is recommended,
PN 8961.
To activate or deactivate this circuit the system must see a programmed time and/or rpm setting which is
programmed in the Settings – Output. Using both On and Off values will set a window to control the switch.
The output will only be activated while within the set window and will be deactivated as soon as one or both
sides of the windows are not met. All parameters must be met for the output switch to be activated. For
example, if values are entered for both RPM On and Activation Point (timed on) then both of those values
must be reached before the switch is activated. The rpm function becomes active and the time function
begins counting after the Dark Blue launch wire is released.
Note: If using the time activation function a duration MUST be set above 0.00 or the switch will not be
activated by time.
IGNITION TIMING
The user can set the timing from 0 - 60° BTDC. However, actual timing will never advance past the maximum
timing reference nor will the timing retard more than 30° from the max timing reference. MAX and MIN timing
lines will be displayed for convenient reference in the main engine timing tab. (Those lines can be turned
off by unchecking them in the upper left column.)
Note: When using EFI the max timing reference and the main timing must be the same number.
Engine timing cannot exceed the maximum timing reference. In order to advance timing, the main timing
map must be set below the maximum timing reference. I.E. If the crank trigger is at 40° and the main timing
map is set to 35° there will be up to 5° of advance available.
ENGINE TIMING
Using MSD View software, an entire timing curve can be mapped. The map specifies the actual engine
timing. The Power Grid will retard the input trigger to obtain the correct engine timing. The maximum timing
reference must be set properly for correct engine timing. These maps include changes in 50 rpm increments
and timing changes down to 0.1 degrees. A maximum of 30 points can be set per map.