Driving with a broken speedometer in your muscle car has sadly fallen out of fashion. As a tech in the '90s, I'd see vehicles with carefully crafted cheat sheets taped to the dashboard calculating rpm ...

Sometimes, the factory speedometer isn’t an option. Maybe you’re trying different wheel and tire combinations that throw off calibration. Maybe the gauge cluster finally gave up the ghost. Or maybe ...

The average car speedometer may be off by a few mph There are several GPS and 3rd party apps that show your actual speed The speedometer, of course, tells you how fast or slow your car is moving when ...