Technical information

AUTOTRONIC CONTROLS CORPORATION • 1490 HENRY BRENNAN, EL PASO, TEXAS 79936 • [phone] • FAX [phone]
www.msdignition.com email: [e-mail]
100
TIMING COMPUTER, PN 8981
T
A
C
H
T
A
C
H
C+
C-
IGN
PTS
M+
M-
HEAVY RED
TO GROUND
NOT USED
WHITE
TIMING
CONTROL
PN 8981
SWITCHED 12 VOLTS
FROM IGNITION KEY
YELLOW
RED
RED
BLACK
NOT
USED
ORANGE
HEAVY BLACK
PRO POWER COIL
PN 8201
+
GRAY
BLACK
VIOLET
TO STARTER
SOLENOID
(FOR START RETARD)
OR
GREEN
VIOLET
DISTRIBUTOR
WITH
MAGNETIC PICKUP
12V
ACTIVATION
STAGE 1
NITROUS
SOLENOID
+
TO BATTERY
TO BATTERY
CYLINDERS
8
6
4
CUT LOOPS
NONE
RED
RED
&
BLUE
All adjustments of the Timing Computer are taken from your Mechanical, or total timing setting.
The Mechanical timing is set by the position of the crank trigger or distributor. Before making
any adjustments, be sure to have your mechanical timing set to your specifications.
RPM: This is the rpm point in
which the advance will begin. To
set this, accelerate the engine to
the rpm point that you want the
advance to start. Turn the RPM
control pot counterclockwise
until the timing begins to change.
Initial Timing: This adjusts
the timing setting where the
engine idles. This amount can
be adjusted 20° from where
the mechanical timing is set.
To adjust the initial timing,
turn the control pot
counterclockwise. It will
retard the timing up to 20°
from the mechanical timing.
Slope: This is the point where
the timing advances to the
mechanical timing again. To
set this, rev the engine up to
the rpm point that the timing
should be completely in at.
Turn the Slope control pot
counterclockwise until the
timing begins to change.