Car Gear Ratios Dallas TX

A short gear is one with a low gear ratio, and a tall gear is one with a high gear ratio. For example, a 3.321:1 gear is shorter than a 1.902:1 gear.

In racing, you want to set up your gears so that you can use the full potential of your engine in each gear. In other words, it is not useful to have a 5-speed transmission if you’re driving on a relatively low-speed track where you never shift up to fifth gear. In this case, you could install a shorter final gear, which will have the effect of shrinking the difference between gears and allowing you to use the fifth gear. The opposite problem is when you run out of gears (reach the RPM limit in fifth gear). To allow for more top speed, you can install a taller final gear, which will have the effect of increasing the difference between your transmission’s gears. Before choosing a new final gear, you can use the Top Speed Calculator at http://www.240edge.com/performance/top-speed-calc.html to find what the top speed of your car will be with the new gear ratio. It is also possible to change the individual gears in your transmission, but this is not practical. It is usually only done by professional race teams.

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