The SE-1100 noncontact engine tachometer features an ignitionspark-detection method that makes it safe and easy to use. The handheld tach weighs about 110 gm including batteries. Rpm updates every ...

Ever since the first race cars were built, it's been helpful for drivers to know their engine speed. It may sound obvious, but engine power is always a function of engine speed, so accurately knowing ...

With more and more new-car buyers choosing automatic transmissions over manuals, why do tachometers still have such a large presence on dashboards? The tachometer displays engine speed in revolutions ...

Yeah, it might be a nerdy gearhead thing, but as enthusiasts we want a lot of information about what our cars are doing. Unfortunately, the manufacturers don't quite see it our way, so cars are ...

RPM stands for revolutions per minute, and in cars, it measures how many times the engine’s crankshaft makes one full rotation every minute and how many times each piston goes up and down in its ...

When you’ve got a piece of interesting old aviation hardware on your desk, what do you do with it? If you’re not willing to relegate it to paperweight status, your only real choice is to tear it down ...