Tachometers

Want to see exactly when the engine hits the right shift point? A separate tachometer gives you a clear readout of engine RPM, and we have gauges for the street car, the track car and the drag racing project.

How to choose a tachometer

Start with the scale: it should cover the engine's maximum RPM with a little margin, but a very large scale can make it harder to read accurately in the range you use most. For example, we have gauges from 4,000 up to 11,000 RPM. The size depends on space and use – a 5 inch gauge is easy to read at speed, while 2-1/16, 2-5/8 and 3-3/8 inch typically fit existing panels or gauge pods. Also consider:

• Mounting: models for in-dash installation or pedestal mounting on top of the dash
• Shift light: built-in shift light or separate lamps, e.g. a Pro Stock model with four lights
• Memory: versions with memory or playback function can store data so you can review the run afterwards

Installation and signal

An electronic tachometer needs an RPM signal from the car, and which connection is right depends on the ignition system and engine management. So check the instructions for the specific part number before you order. Also make sure you have stable power, a good ground and a lighting feed so the gauge can be read at night.

Matching instrumentation

The category consists of gauges from AutoMeter in series such as Sport-Comp, Ultra-Lite, GT Series, Z-Series and American Platinum. If you choose the same series for several instruments, the panel gets a uniform look – combine them with our speedometers, for example, or see the full category of speedometers and tachometers.

Frequently asked questions

How high should the scale on my tachometer go?

Choose a scale that covers the engine's maximum RPM with a little margin. A scale far beyond your needs can make the display less precise to read in the range where you drive most.

Can an aftermarket tachometer be used on a car with engine management?

It depends on the gauge and the car's ignition system. On some cars the signal cannot be taken directly from the ignition coil, so check the connection options in the instructions for the specific part number before you buy.

Why does my tachometer read incorrectly after installation?

A typical cause is an incorrect cylinder count setting or a signal that does not match the gauge. An unstable reading can also be caused by a poor ground connection or electrical noise from the ignition system.