The DSL-1E Universal Diesel Tachometer Interface accepts an RPM signal from several different sources and converts the information into a tachometer signal for a 4, 6 or 8 cylinder, gas-engine tachometer. Able to receive a signal from the "W" terminal found on some diesel alternators, a timing gear (crank trigger) signal or a fly-wheel sensor, the DSL-1E is fully adjustable to allow for calibration to your gauge of choice. An onboard digital readout and integrated switches allow for push-button calibration.

Unit measures 4" x 2" x 1" and is designed to be mounted inside a vehicle.

Product not compatible with '86-91 VW Vanagon's and other similar models.

FAQ - Will It Work on...

Unfortunately we cannot test every possible combination, but here is what you need to find out to see if this item will work for your application.

DSL-1 vs DSL-2 Diesel Applications:

The DSL-1 diesel tach adapter is specifically for engines that have a “W” terminal on the alternator (usually a Bosch alternator). Since we don’t have an exhaustive list of vehicles this applies to, you will have to find out about your car to know if it will work or not. Again, this is only for analog tachometers.

The DSL-2 is the DSL-1 box with the addition of a 2-wire magnetic sensor that can read the teeth on the flywheel, thus generating a tachometer signal. This can be used on any application, including diesel engines, where you need to generate a tach signal. This output is the same, it only works on analog tachometers.

For dual ECU engine swaps for cars with CAN BUS gauges (350z, E46, IS300 etc). – In some cases, the easiest way to solve CAN BUS gauges not working is to keep the original engine ECU as WELL as the new engine ECU. The new engine ECU runs the engine, but some signals are fed to the original ECU which can send the information via CAN BUS to the stock gauges (in particular the tachometer signal). This is done by using an SGI-5 “speed” adapter (not an SGI-8 or DSL-1) to read the crank sensor speed (magnetic or hall effect) and then convert that signal to one that the original ECU understands. This requires advanced wiring and unfortunately we do not provide that service, but you can speak to the guys at Tweak’d Performance about wiring harnesses for engine swaps.

This listing is for the DSL-1 only, but you can purchase the SGI-5, SGI-8 or DSL-2 separately in our store if you need those instead.