MSD Ignition 7AL-3 7230 User Manual

MSD 7AL-3, Ignition Control
PN 7230
Important: Read the instructions before attempting the installation.
Parts Included:
1 - 7AL-3, PN 7230
1 - Parts Bag (wires and connectors)
4 - RPM Modules 3000, 7000, 8000, 9000
4 - Retard Modules 2°, 3°, 4°, 4°
4 - Zero Degree Modules
4 - Vibration Mounts
WARNING: During installation, disconnect the battery cables. When disconnecting the battery,
always remove the Negative cable first and install it last.
Note: The MSD 7AL-3 will retard the ignition timing approximately 4° compared to other MSD Ignitions.
After installation, the timing should always be checked and adjusted at idle and total timing.
Note: This unit is designed for 8-cylinder engines only.
COIL RECOMMENDATIONS
The MSD 7AL-3 can be used with a variety of coils, but to receive the best performance, it is
recommended to use an MSD Coil. For drag racing and “short duration” applications, the Pro Power
Coil, PN 8201, is the best choice. For street applications or long duration racing events, the HVC Pro
Power Coil, PN 8251 is recommended. The 7AL-3 may be used with a GM HEI Distributor with an
internal coil, however the Rotor Bushing must be replaced with an MSD Low Resistance Bushing,
PN 8412.
MOUNTING
The 7AL-3 can be mounted under the hood, but should be mounted in a position away from direct
engine heat sources. Use the ignition as a template and mark the location of the mounting holes.
Remove the unit and drill the holes using a 1/4" bit. Install the vibration mounts to the 7AL-3 then
mount the ignition using the supplied lock washers and nuts.
WIRING
Wiring the 7AL-3 will be simple by following the instructions. There are several color coded wires
supplied with the 7AL-3 and should be used as noted to avoid confusion or wrong connections. This
section is also broken down into two sections; Primary Wiring and Optional Wiring.
• The Primary section designates the wires that must be connected to run the engine.
• The Optional Wiring section explains the wiring of optional built-in features such as the Rev Controls,
RPM Activated Switch and Retard Controls.
WARNING: The 7AL-3 produces very high voltages. Never short the battery or coil terminals. Use
caution during installation and while working near the ignition.
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MSD Ignition 7AL-3 7230 Specifications

General

MPN	7230
Brand	MSD Ignition
Series	7AL-3
Output Voltage	45, 000 Volts
RPM Range	Up to 15, 000 RPM
Rev Limiter	Adjustable
Timing Retard	Adjustable
Input Trigger	Magnetic Pickup or Points
Case Material	Aluminum
Input Voltage	12V DC
Secondary Voltage	45, 000 V
Spark Duration	20 degrees
Features	Adjustable rev limiter

Summary

Coil Recommendations

Mounting

Wiring

Primary Wiring

Details the essential connections required to operate the engine with the MSD 7AL-3.

Magnetic Pickup Polarity

Explains correct wiring polarity for various magnetic pickup distributors to ensure proper triggering.

GM HEI Distributor

Optional Wiring

Start Retard

Explains how to set up and wire the 25° ignition timing retard for easier starting.

Three Step RPM Limits

Details how to configure and wire the three-step RPM limiter for launch and burnout control.

RPM Activated Switch

Instructions for wiring the RPM Activated Switch (RAS) to control external components.

Multi-Step Retard

Connecting the Multi-Step Retard Function

Step-by-step guide for wiring the multi-step retard modules for specific applications.

Retard with the RPM Activated Switch

How to use the RPM Activated Switch to trigger retard stages via an external relay.

Tachometer

Kill Switch

Troubleshooting

Diagnostic LED

Explains the function of the Green and Red diagnostic LEDs for system status.

Wiring Check

Essential checks for all wire connections to ensure proper installation and function.

Checking for Spark

Procedures to verify if the ignition system is producing a spark correctly.

Service

Limited Warranty