A plate attached to the carburetor that limits the amount of airflow entering the combustion chamber. It decreases horsepower. Read More »

Automotive jargon for the range of speeds (expressed as revolutions per minute) in which an engine is designed to operate. The lowest point in the rev range is the idle speed; the highest point is the redline. Read More »

A form of race start that begins with the cars already in formation, while also in motion. Read More »

A closed course with turns to both the right and the left mimicking a normal road. Read More »

The sensation of feeling the road through the steering and suspension systems. This gives the driver information about driving conditions. For example, cars that negate road feel by providing an excessively smooth ride can create a sense of being out of control by eliminating important information about the condition of the tarmac. Read More »

A well-regarded Austrian motorcycle/engine maker. Read More »

Any type of bruise or wound that is inflicted when you hit the ground, generally in a low-speed crash. A skinned knee is a type of road rash; multiply that by 100 and you get road rash that happens to unprotected motorcycle riders during an accident. High-speed crashes do much more damage. Read More »

Used in most single cam engines , these are pivoting levers that transfer the movement caused from the rotating lobes of the cams to the intake and exhaust valves. In most single and double overhead cam engines, the cam lobes act directly on the ends of the valves, reducing components, weight and complexity. Read More »

The section of a car’s body below the door opening. It usually runs from the front-wheel opening to the rear-wheel opening. Read More »

The device through which air passes to cool a single system in a car. Normally, it is used to cool engine coolant. Conversely it can cool engine oil. In the case of a turbocharged car, a radiator cools the air being forced into the engine and is called an intercooler. Read More »