MSD Soft Touch Rev Control is a device that helps drivers to maintain their engine’s RPM limit by limiting the ignition timing. It is an essential device for drag racers and other high-performance drivers. The wiring diagram of the MSD Soft Touch Rev Control is critical to ensure that the device performs as expected. In this article, we will explain the wiring diagram of the MSD Soft Touch Rev Control to help you install the device successfully.
The Basics of MSD Soft Touch Rev Control
The MSD Soft Touch Rev Control is a device that limits the engine’s RPM by retarding the ignition timing. The device has a built-in chip that sets the RPM limit, and when the engine reaches that limit, the device retards the ignition timing to limit the RPM. The device is wired into the ignition system and requires proper wiring to function correctly.
How Does MSD Soft Touch Rev Control Work?
The MSD Soft Touch Rev Control works by retarding the ignition timing when the engine reaches the desired RPM limit. The device has a built-in chip that sets the RPM limit, and when the engine reaches that limit, the device retards the ignition timing to limit the RPM. The device also has a soft-touch circuit that helps to prevent the engine from dropping too quickly.
The MSD Soft Touch Rev Control uses a magnetic pickup to sense the engine’s RPM. When the engine reaches the RPM limit set on the device, the device retards the ignition timing by grounding the ignition coil’s primary circuit. This grounding prevents the coil from charging, thus retarding the ignition timing and limiting the RPM.
What is the Wiring Diagram of MSD Soft Touch Rev Control?
The wiring diagram of MSD Soft Touch Rev Control is straightforward and consists of four wires: red, black, white, and green. The red wire connects to the ignition switch’s 12-volt source, and the black wire connects to the ground. The white wire connects to the magnetic pickup, and the green wire connects to the ignition coil. The following table summarizes the wiring diagram:
| Wire Color | Connection |
|---|---|
| Red | Ignition Switch’s 12-volt source |
| Black | Ground |
| White | Magnetic Pickup |
| Green | Ignition Coil |
Installation of MSD Soft Touch Rev Control
The installation of MSD Soft Touch Rev Control requires a basic understanding of automotive wiring. Follow the steps below to install the device:
Step 1: Disconnect the Battery
Disconnect the battery’s negative terminal to prevent any accidental electrical shocks or short circuits.
Step 2: Wiring the Device
Wire the device according to the wiring diagram. Connect the red wire to the ignition switch’s 12-volt source, the black wire to the ground, the white wire to the magnetic pickup, and the green wire to the ignition coil.
Step 3: Mount the Device
Mount the device in a suitable location near the ignition coil. Ensure that the device is securely mounted and that the wires are not touching any moving parts or hot surfaces.
Step 4: Reconnect the Battery
Reconnect the battery’s negative terminal and ensure that all connections are secure.
FAQ
What is the RPM limit of MSD Soft Touch Rev Control?
The RPM limit of MSD Soft Touch Rev Control can be set between 3,000 to 9,900 RPM using the built-in RPM module.
Can MSD Soft Touch Rev Control be used on any engine?
MSD Soft Touch Rev Control can be used on any 4, 6, or 8-cylinder engine with a conventional distributor-based ignition system.
Is it necessary to use MSD ignition system with MSD Soft Touch Rev Control?
No, it is not necessary to use an MSD ignition system with MSD Soft Touch Rev Control. The device can be used with any conventional distributor-based ignition system.
Can MSD Soft Touch Rev Control be used in conjunction with other ignition timing devices?
MSD Soft Touch Rev Control is designed to be used as a standalone device and should not be used in conjunction with other ignition timing devices.
What is the warranty period of MSD Soft Touch Rev Control?
The MSD Soft Touch Rev Control has a one-year warranty from the date of purchase against material and workmanship defects.
Conclusion
MSD Soft Touch Rev Control is a critical device for high-performance drivers who want to maintain their engine’s RPM limit. The wiring diagram of the device is straightforward and requires proper installation to function correctly. By following the installation steps outlined in this article, you can install the device successfully and enjoy its performance benefits. If you have any further questions or concerns, consult with your local mechanic or MSD technical support for additional assistance.
