MSD 8732 2-Step Rev Control for Digital 6AL Installation - Manual

M S D I G N I T I O N
• W W W . M S D I G N I T I O N . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • FA X ( 9 1 5 ) 8 5 7 - 3 3 4 4
Figure 1
Digital 2-Step
PN 8732
For the Digital 6AL Ignition Control, PN 6425
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Parts Included:
1 – Control
4 – Mounting Screws
WARNING: During installation, disconnect the battery cables. When disconnecting the
battery, always remove the negative cable first and install it last.
Note: Must be used with an MSD Digital 6AL Ignition, PN 6425.
GRAY
TO
SWITCHED
12V
BLACK
TO GROUND
BLUE
RED
ACTIVATE THE
2-STEP WITH
12 VOLTS
TO
TACH WIRE
ON MSD 6AL
PN 6425
X1000 X100
ALWAYS SET THE RPM VALUE
WITH THE PRINTED NUMBER ON
THE HOUSING. THIS FIGURE
SHOWS A SETTING OF 3000 RPM.
OPERATION
The Digital 2-Step Control is designed
specifically for the MSD Digital 6AL
Ignition Control, PN 6425. It provides
the ability to set an rpm limit to be used
during the launch of the vehicle through
a switch or tied into a line-lock device
or trans-brake.
There is a Blue wire coming out of the
2-Step, that controls when the launch
rpm limit is activated. When this wire
is connected to 12 volts, the 2-Step is
activated. When released, the rpm limit
that is set in the Digital 6AL Ignition is
active. This wire can be tied into a trans-
brake circuit, a clutch switch or simply
a stand alone switch.
RPM LIMIT
The rpm limit is set with the two rotary dials, in 100 rpm increments. The limit can be programmed
from 2,000 rpm to 11,800 rpm. (The position for 11,900 is reserved for use with MSD's Power Grid
ignition system.)
LED
There is a useful LED built into the Digital 2-Step. This LED will illuminate when 12 volts are applied to
the Blue wire and the low rpm limit of the 2-Step is active. When 12 volts are removed from the Blue
wire the 2-Step rev limit and the LED will turn off.
3-STEP
If you prefer to have three different rev limits, a second PN 8732 could be used to provide a third rev
limit, such as for use during the burnout.