A tachometer is a device that can display information about the number of revolutions of the crankshaft. This device must be installed on vehicles with forced engines. It can be used to determine the optimal operating mode of the engine.
Instructions
Step 1
Quite a lot of people buy Russian cars in order to create racing versions of them for participation in competitions. In this case, a tachometer is also indispensable. When connecting the device to a VAZ car, it is necessary to take into account a number of features.
Step 2
The easiest way to connect the device is through a metal cable. He, in turn, goes to the engine. If you want to install a tachometer on a carburetor car, you need to connect to the ignition system. As a result, the pulse frequency will be converted into an electromagnetic field. This signal will be processed by a specialized electronic device and displayed on the electronic tachometer.
Step 3
Also with the crankshaft there are two pulses. They are eventually converted into a signal. It will be displayed on the device.
Step 4
On injection vehicles, the tachometer is installed in a completely different way. It connects to the ECM. In this case, the pulses will be read directly from the controller, which receives data from the crankshaft position sensor. The tachometer is optional, but most drivers prefer to use it while driving. This device is especially useful for beginners who are not able to "by ear" determine the engine speed. Also, when buying a tachometer, you should definitely pay attention to the brands of cars on which it can be installed. This information is usually found on the box of the instrument. Failure to do so may result in incorrect readings on the instrument. In some cases, there are serious problems with the car's wiring, especially on injection engines.
