J&S Electronics Dual Monitor

Ten segment bargraph display shows amount of retard, and thus gives an indication of the engine's tendency to knock at any particular time. The monitor is driven by the Ultra J&S SafeGuard to which it attaches with a simple push-in connection. We recommend stongly that the Knock / Retard monitor be purchased with your SafeGuard unit. Without the Knock / Retard Monitor you will not have any visual clues as to the work the SafeGuard is doing to protect your engine. A built-in light sensor dims the display automatically at night.

The display shows how much tiiming is being taken out by the SafeGuard. When the SafeGuard is set for 20° control range, each LED is worth 2°. If the SafeGuard is set for "retard all", and it is taking out say 12° of timing, then you would see the 6th LED on. If the SafeGuard is set for "retard separate", then the display becomes more complex. Since the SafeGuard can retard each cylinder by a separate amount, you will see one LED on for each cylinder that is being retarded, and the position of that LED indicates how far. For example, let's say that one cylinder is retarded 4°, another 6°, and another 8°, then you would see the 2nd, 3rd, and 4th LEDs on.

The ten segment LED (GGGYYYYRRR) Air Fuel Display now has a user selectable, via a toggle switch, dual resolution feature that allows accurate tuning for both cruise and full power modes. Under Cruise Mode the display reads air fuel ratios from full rich 10:1 to full lean 17:1. Under Power Mode the gauge expands the resolution around the "sweet spot" where maximum full power occurs...11:0:1 to 12.0:1 to 13.5:1. This feature alone makes this the most powerful tuning tool you can have in you arsenal. Combined with the retard display this new 2" round gauge represents a huge step forward in the information revolution.