MSD 62153 DIS-4 Plus High Output Installation - Manual (Page 8)

8 INSTALLATION INSTRUCTIONS
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• W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4
PROGRAMMABLE FEATURES
The DIS Ignitions provide several programmable features that are set using the seven rotary dials
on their end panel. The DIS Ignitions are programmed at the factory for operation on most 4, 6 or
8-cylinder engines with distributorless ignitions.
Figure 5 Programming Rotary Switches.
IGNITION MODE
The first dial, Ignition Mode, has several features and must be set to configure the MSD to match
your ignition system.
Waste Spark: If the ignition system uses dual tower coil packs, the system is a Waste Spark (WS).
This means that each side of the coil is fired but only one cylinder is under compression, so the other
spark is ‘wasted’. For these systems, you will select one of the WS On positions.
If you are incorporating a coil-per-cylinder ignition system, select a WS Off position.
Plus 4K or ØK: Each of the Ignition Mode selections shows Plus 4K or ØK. This will add either 4,000
rpm to the Max rev limit that you set or will leave the rpm limit at the value shown. This allows for a
Max rev limit to be set above 9,900 rpm and to 13,900 rpm.
Step Off Delay: If you are using nitrous, the Step Off Delay should be incorporated. This feature will
keep the timing retarded for one second after the Step Retard is deactivated. This helps clear the
engine of the nitrous mixture. When positions 4-7 are used, the Step Off Delay is active. When 0-3
positions are selected there is NO Step Off Delay.
Ignition Off: Positions 8-9 will disable the spark output of the ignition. This could be used as a theft
deterrent.
Switch Position WS or CPC Standard RPM or Add 4,000 Step Delay
0 CPC Standard No
1 (Default) WS Standard No
2 CPC Add 4,000 rpm to Max limit No
3 WS Add 4,000 rpm to Max limit No
4 CPC Standard Active
5 WS Standard Active
6 CPC Add 4,000 rpm to Max limit Active
7 WS Add 4,000 rpm to Max limit Active
8 Ignition is Disabled
9 Ignition is Disabled
IGNITION MODE SWITCH POSITIONS