Technical information

AUTOTRONIC CONTROLS CORPORATION • 1490 HENRY BRENNAN, EL PASO, TEXAS 79936 • [phone] • FAX [phone]
www.msdignition.com email: [e-mail]
68
DEFAULT SWITCH POSITIONS SHOWN
MAX SPEED REV LIMIT
Selectors S5, S6, S7, and S8 deter-
mine the rpm point at which the engine
over-rev limiter is activated. Position the
selectors to the desired rev limit
indicated below.
RPM S5 S6 S7 S8
6250 OFF OFF OFF OFF
6500 ON OFF OFF OFF
6750 OFF ON OFF OFF
7000 ON ON OFF OFF
7250 OFF OFF ON OFF
7500 ON OFF ON OFF
7750 OFF ON ON OFF
8000 ON ON ON OFF
8250 OFF OFF OFF ON
8500 ON OFF OFF ON
8750 OFF ON OFF ON
9000 ON ON OFF ON
9250 OFF OFF ON ON
9500 ON OFF ON ON
9750 OFF ON ON ON
10000 ON ON ON ON
TIMING SETUP
When the Timing Setup function, S4, is
On the ignitions spark output is
disabled and the built-in LED indicator
is turned on. Note: the Timing Setup
switch must be set in the Off position in
order for the ignition to fire.
RETARD BEGIN SPEED
The Retard Begin Speed, S1, S2 and
S3 of Switch 3 determines the rpm
point at which the ignition’s retard
function will begin to retard the timing.
Position the switches to the desired
rpm point shown in the graph below.
RPM S1 S2 S3
4000 OFF OFF OFF
4500 ON OFF OFF
5000 OFF ON OFF
5500 ON ON OFF
6000 OFF OFF ON
6500 ON OFF ON
7000 OFF ON ON
7500 ON ON ON
MAX SPEED RETARD
The Max Speed Retard sets the amount
of ignition retard that occurs between
the Retard Begin Speed and the Max
Speed Rev Limit. Position selectors S5,
S6, S7 and S8 to the amount of retard
desired.
DEG S5 S6 S7 S8
0 OFF OFF OFF OFF
1° ON OFF OFF OFF
2° OFF ON OFF OFF
3° ON ON OFF OFF
4° OFF OFF ON OFF
5° ON OFF ON OFF
6° OFF ON ON OFF
7° ON ON ON OFF
8° OFF OFF OFF ON
9° ON OFF OFF ON
10° OFF ON OFF ON
11° ON ON OFF ON
12° OFF OFF ON ON
13° ON OFF ON ON
14° OFF ON ON ON
15° ON ON ON ON
STAGING REV LIMIT
Selectors S1, S2, S3 and S4 set the
rpm point at which the Staging Rev
Limit feature limits the engine rpm at.
Position the selectors to the desired
rpm below.
RPM S1 S2 S3 S4
3000 OFF OFF OFF OFF
3250 ON OFF OFF OFF
3500 OFF ON OFF OFF
3750 ON ON OFF OFF
4000 OFF OFF ON OFF
4250 ON OFF ON OFF
4500 OFF ON ON OFF
4750 ON ON ON OFF
5000 OFF OFF OFF ON
5250 ON OFF OFF ON
5500 OFF ON OFF ON
5750 ON ON OFF ON
6000 OFF OFF ON ON
6250 ON OFF ON ON
6500 OFF ON ON ON
MAX TIMING
The Max Timing selectors, S6,
S7 and S8 are for a feature
which is not programmed into
this model. Changing the
position of the Max Timing
selectors will not affect the
operation of this ignition.
WASTE SPARK
Selector S4 programs the
ignition for use with single (coil
per cylinder) or dual output
(coil pack) type coils. Set
selector S4 to OFF for
engines equipped with one
coil per cylinder (720° firing) or
to ON for all coil pack (360°
firing) equipped engines.
ELECTRIC START
Selector S3 programs the
ignition spark to occur after
one revolution for electric
starter equipped engines or
immediately for hand crank/
kick start type engines. Set
selector S3 to ON for hand
crank/kick start engines only.
HIGH SPEED RETARD
When the High Speed Retard
selector, S2, is ON the
ignitions high speed retard
feature will retard the ignition
timing 20° starting at 1000
rpm before the Max Speed
Rev Limit point.
MAX/MIN REV LIMIT (+)
Selector, S1, extends the
range of the Max Speed Rev
Limit and the Staging Rev
Limit by 4000 rpm. Set
selector S1 to ON to increase
the indicated Rev Limit points
by 4000 rpm.
NOTE: The ignition switch must be
turned ON then OFF before new
program changes will take effect.