Engine Knock Alert, PN 8964
Features:

• Visually and audibly alerts you of detonation.
• Great for well insulated vehicles.
• Adjustable sensitivity to match your engine.

One of an engines worst enemies is detonation. It can occur at any time and if its left uncontrolled, severe engine damage may result. Sometimes however, the pinging noise may be hard to hear or recognize due to well insulated interiors, engine compartments or excessive road noise. The MSD Engine Knock Alert listens to what's going on in the engine for you. When detonation occurs, it relays this information to you in two forms; a warning light and an audible beep. An extremely sensitive Knock Sensor is used to "listen" to the engine. This sensor is screwed into one of the engine block's drains or access holes (an adapter mount is also supplied). Once in place, the sensor relays excessive detonation noise to the Knock Alert. Since all engines make noise, some more than others, MSD added a sensitivity adjustment to the Alert. This adjustment allows you to "tune" the Alert to match your engine's characteristics.
The Knock Alert is easy to install and features matching Weathertight connectors for firm connections. It will work on 4, 6 and 8-cylinder engines with 12 volt electrical systems and comes complete with the sensor, adapter and controller.

Using the Alert
Just knowing when detonation is occurring isn't going to stop it. To take full advantage of the Knock Alert, an MSD Adjustable Timing Control should be used. This way, when the Alert is showing detonation, you can simply retard the timing with the dash mounted control knob of the Timing Control until the Alert shows that the detonation is gone.
For example, as you're driving through the mountains and the Alert light all of a sudden shows heavy detonation you simply reach over and retard the timing until the Alert shows that it is safe. This way, you don't have to slow down to a snail's pace or worry about hurting the engine. When you get over the peak, you can return the timing to the factory setting for more power and economy!

Engine Knock Alert
PN 8964