INSTALLATION INSTRUCTIONS

7

Burnout Rev Limit:

Connect the supplied Blue wire from the Burnout terminal of the MSD to the 12 volt activation wire of

the line lock solenoid. With this setup, when the line lock is activated, 12 volts will be supplied to the

Burnout terminal which limits the rpm to your specified burnout rpm module.

Launch Rev Limit:

Connect the supplied Light Green wire to the Launch terminal of the MSD then splice it into the clutch

or trans brake 12 volt activation wire. This way, when the clutch pedal is depressed, 12 volts is applied

to the Launch terminal which limits the rpm to your specified launch rpm module.

Note: The Launch rpm limit is designed to override the Burnout limit. This way, if you activate the

line-lock on the starting line, when the Launch terminal is activated through the trans brake or

clutch switch, the Launch rpm (not the Burnout limit) will be in effect. After the car launchs the

Race rpm limit is activated to protect the engine from over revving.

RPM ACTIVATED SWITCH

The RPM Activated Switch (RAS) Output will turn on

a component such as a shift light or nitrous solenoid

at an adjustable rpm point by supplying a ground

path (Figure 11). The RPM Switch is capable of

handling a 10 amp load. If 12 volts is required to

activate the component, use an MSD Relay, PN

8960 or PN 8961.

The 7AL-3 also features an "RAS On/Off" for the RPM

Activated Switch. To use the RPM Switch, 12 volts

must be connected to the “RAS-On/Off” terminal

located at the top of the third terminal strip. When-

ever the 12 volts is removed from this terminal, the

RPM Activated Switch

will not operate. This is a

useful feature for only turning on a nitrous solenoid

in high gear

by incorporat-

ing a switch

on the shifter

(Figure 12).

Figure 12 Turning on Nitrous with R.A.S. after Transbrake is released.

RAS

ON/OFF

Figure 11 Connecting the RPM Activated Switch.

7AL-3 SIDE VIEW

4500

RPM ACTIVATED

SWITCH

NITROUS

SOLENOID(S)

WIRE (+)

INDICATES CONNECTION

12V

SWITCH

TWO STEP WIRE

TRANS

BRAKE

GROUND

GROUND

PUSH BUTTON

BATTERY

12 V