Our tach input cable connects a tach signal from your vehicle's ignition system to the digital tach input on the Race-Keeper system. The tach data signal should be a clean square wave, nominally 0-5v.

The Race-Keeper SE cable is 6' long with a bare end for connection to tach signal and an RJ-45 connector that plugs into the Race-Keeper SE's connector port on the connector panel on the back of the Race-Keeper system. Plug the cable into the bottom right RJ-45 socket on the Race-Keeper SE.

The Race-Keeper HE cable has a bare wire for connection to tach signal on the vehicle and a locking sensor input connector for connection to the Race-Keeper HE's sensor input.

Race-Keeper Comparo manages calibration of the tach input signal. Once an outing has been recorded with the tach cable connected, the tach data will appear as an available data channel in Race-Keeper Comparo, which you can calibrate by right-clicking on the RPM channel name and selecting the number of pulses per two engine revolutions.