Msd 8969 Digital RPM Window Switch Installation User Manual download pdf

Digital RPM Activated Window Switch

PN 8969

Parts Included:

1 - Digital Window Switch, PN 8969

1 - Parts Bag

OPERATION

The MSD Digital RPM Activated Window Switch accepts a variety of input signals from sources

such as a coil negative terminal (factory inductive ignitions), a CD ignition tach-output such as

an MSD 6 or 7 Series Ignition, an output from an ECU, or a 5-400 volt signal from an MSD Tach

Adapter.

The PN 8969 can be programmed for use on nearly every engine with a spark ignition or tachometer

signal. The rpm values are adjustable in 100 rpm increments from 200 - 15,000 rpm (The rpm is shown

x100). There must be a difference of at least 300 rpm between the two activation points for correct

operation. Changes can be made while the engine is running.

Note: There is a 200 rpm safety range built into the activation and deactivation points. This means

that the rpm must drop 200 rpm below the activation point to turn the circuit off. Conversely, the rpm

must drop 200 rpm below the deactivation point in order to turn the circuit back on. This is to prevent

the circuit from ‘chattering on and off’.

This switch is also capable of activating a circuit at a higher rpm than the Off rpm.

PROGRAMMING THE RPM

The engine application and rpm activation points are easily selected through push buttons on the

LED panel (Figure 1). This Switch can be programmed for a variety of engine and ignitions as shown

in the following chart.

1-Cylinder This program is used for individual coil per cylinder systems (such as GM

LS-1 engines, or ’99-Up Mustangs).

2-Cylinder This is for ignitions with coil packs that ﬁre two cylinders at the same time

(waste spark systems).

2-Cyl. Odd Use on coil pack ignitions that are on odd-ﬁre engines such as a

Viper V-10 or Harley-Davidson motorcycle.

4-Cylinder Typical 4-cylinder engines with a distributor.

6-Cylinder Typical 6-cylinder engines with a distributor.

6-Cyl. Odd Typical 6-cylinder odd-ﬁre engines with a distributor.

8-Cylinder Typical 8-cylinder engines with a distributor.

M S D • 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

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Summary of Contents

Page 1 - OPERATION

Digital RPM Activated Window SwitchPN 8969Parts Included: 1 - Digital Window Switch, PN 89691 - Parts BagOPERATIONThe MSD Digital RPM Activated Window

Page 2

2 IN STA LLA T ION IN STR UCT ION SM S D • 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 )

Page 3

IN STA LLA T ION IN STR UCT ION S 3M S D • 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

Page 4 - AND PIN LOCATIONS

Figure 5 Wired to an ECU Output. COIL5 VOLT CONVERSIONS AND PIN LOCATIONSOn many DIS applications, you can connect the White wire to the ECU

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Msd 8969 Digital RPM Window Switch Installation User Manual

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