When it comes to high-performance ignition systems, few brands are as popular as MSD. The company’s MSD 6AL 6420 ignition box is one of the most commonly used systems in the world of performance tuning. However, understanding how to wire this system can be a bit confusing. In this article, we’ll break down the MSD 6AL 6420 wiring diagram in easy-to-understand terms, with plenty of additional information and frequently asked questions (FAQs) included.
What is the MSD 6AL 6420?
The MSD 6AL 6420 is an ignition control box designed for high-performance engines. It provides a powerful spark that can help improve engine response, acceleration, and overall performance. The unit itself is solid-state and operates on a 12-volt DC electrical system.
How does the MSD 6AL 6420 work?
The MSD 6AL 6420 works by receiving signals from the engine’s distributor and processing them to create a high-energy spark. The unit uses capacitive discharge technology, which allows it to create a spark with a longer duration than traditional ignition systems. This more powerful spark can help improve combustion, leading to better engine performance.
Additionally, the MSD 6AL 6420 includes a built-in rev limiter that can help protect your engine from damage due to over-revving. The system is also compatible with a wide range of aftermarket ignition components, including MSD’s own line of spark plugs, wires, and distributors.
MSD 6AL 6420 Wiring Diagram
Before we dive into the wiring diagram, it’s worth noting that the exact setup of your ignition system may vary depending on your engine and vehicle. Always consult the instructions that come with your MSD 6AL 6420 to ensure proper installation.
That said, here’s a basic wiring diagram for the MSD 6AL 6420:
| Wire Color | Description |
|---|---|
| Red | Connects to switched 12-volt source (ignition switch) |
| Black | Connects to ground |
| Orange | Connects to the positive side of the ignition coil |
| Yellow | Connects to the negative side of the ignition coil |
| Violet | Connects to MSD’s magnetic pickup distributor or crank trigger |
| Green | Connects to a tachometer or aftermarket shift light |
Additional Wiring Tips
Here are a few additional tips to keep in mind when wiring your MSD 6AL 6420:
- Make sure your wiring connections are secure and well-insulated.
- Avoid running your wiring near any high-temperature or moving components.
- Use an appropriate fuse or circuit breaker to protect your system from electrical overloads.
- Consult a professional if you’re unsure of how to properly wire your system.
FAQs
What does the MSD 6AL 6420 do?
The MSD 6AL 6420 is an electronic ignition control box that helps improve the performance of high-performance engines. It provides a powerful spark and includes a built-in rev limiter to help protect your engine from damage.
What vehicles can use the MSD 6AL 6420?
The MSD 6AL 6420 is compatible with a wide range of engines and vehicles, provided they have a 12-volt DC electrical system. However, it’s typically used in performance cars, trucks, and racing vehicles.
What’s the difference between MSD’s 6AL and 6AL-2 systems?
MSD’s 6AL is the company’s standard ignition control box, while the 6AL-2 includes additional features like multiple spark discharge, adjustable timing controls, and more. Which system you choose depends on your specific needs and budget.
Do I need to use MSD’s own ignition components with the 6AL 6420?
No, the MSD 6AL 6420 is designed to work with a wide range of aftermarket ignition components. However, using MSD’s own plugs, wires, and distributors can help optimize your system’s performance.
Can the MSD 6AL 6420 be used with nitrous systems?
Yes, the MSD 6AL 6420 can be used with nitrous systems. However, it’s important to follow the manufacturer’s instructions carefully to ensure proper installation and operation.
What’s the warranty on the MSD 6AL 6420?
The MSD 6AL 6420 is backed by a one-year warranty from MSD, which covers defects in materials and workmanship.
Conclusion
The MSD 6AL 6420 is a powerful ignition control box that can help improve the performance of high-performance engines. Wiring the system correctly is crucial to ensure optimal operation, but it’s a relatively straightforward process with the right instructions. With this article, you should now have a better understanding of the MSD 6AL 6420 wiring diagram and how the system works. If you have further questions or need assistance with installation, consult a professional or contact MSD directly.
